projects/ldc: dmd/expression.c comparison

comparison dmd/expression.c @ 1:c53b6e3fe49a trunk

[svn r5] Initial commit. Most things are very rough.

author	lindquist
date	Sat, 01 Sep 2007 21:43:27 +0200
parents
children	788401029ecf

comparison

equal deleted inserted replaced

-:a9e71648e74d
+:c53b6e3fe49a
+// Compiler implementation of the D programming language
+// Copyright (c) 1999-2007 by Digital Mars
+// All Rights Reserved
+// written by Walter Bright
+// http://www.digitalmars.com
+// License for redistribution is by either the Artistic License
+// in artistic.txt, or the GNU General Public License in gnu.txt.
+// See the included readme.txt for details.
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <assert.h>
+#include <complex>
+#include <math.h>
+#if _WIN32 && __DMC__
+extern "C" char * __cdecl __locale_decpoint;
+#endif
+#if IN_GCC
+// Issues with using -include total.h (defines integer_t) and then complex.h fails...
+#undef integer_t
+#endif
+#ifdef __APPLE__
+#define integer_t dmd_integer_t
+#endif
+#if IN_GCC || IN_LLVM
+#include "mem.h"
+#elif _WIN32
+#include "..\root\mem.h"
+#elif linux
+#include "../root/mem.h"
+#endif
+//#include "port.h"
+#include "mtype.h"
+#include "init.h"
+#include "expression.h"
+#include "template.h"
+#include "utf.h"
+#include "enum.h"
+#include "scope.h"
+#include "statement.h"
+#include "declaration.h"
+#include "aggregate.h"
+#include "import.h"
+#include "id.h"
+#include "dsymbol.h"
+#include "module.h"
+#include "attrib.h"
+#include "hdrgen.h"
+#include "parse.h"
+Expression *createTypeInfoArray(Scope *sc, Expression *args[], int dim);
+#define LOGSEMANTIC	0
+/**********************************
+* Set operator precedence for each operator.
+*/
+// Operator precedence - greater values are higher precedence
+enum PREC
+{
+PREC_zero,
+PREC_expr,
+PREC_assign,
+PREC_cond,
+PREC_oror,
+PREC_andand,
+PREC_or,
+PREC_xor,
+PREC_and,
+PREC_equal,
+PREC_rel,
+PREC_shift,
+PREC_add,
+PREC_mul,
+PREC_unary,
+PREC_primary,
+};
+enum PREC precedence[TOKMAX];
+void initPrecedence()
+{
+precedence[TOKimport] = PREC_primary;
+precedence[TOKidentifier] = PREC_primary;
+precedence[TOKthis] = PREC_primary;
+precedence[TOKsuper] = PREC_primary;
+precedence[TOKint64] = PREC_primary;
+precedence[TOKfloat64] = PREC_primary;
+precedence[TOKnull] = PREC_primary;
+precedence[TOKstring] = PREC_primary;
+precedence[TOKarrayliteral] = PREC_primary;
+precedence[TOKtypedot] = PREC_primary;
+precedence[TOKtypeid] = PREC_primary;
+precedence[TOKis] = PREC_primary;
+precedence[TOKassert] = PREC_primary;
+precedence[TOKfunction] = PREC_primary;
+precedence[TOKvar] = PREC_primary;
+// post
+precedence[TOKdotti] = PREC_primary;
+precedence[TOKdot] = PREC_primary;
+//  precedence[TOKarrow] = PREC_primary;
+precedence[TOKplusplus] = PREC_primary;
+precedence[TOKminusminus] = PREC_primary;
+precedence[TOKcall] = PREC_primary;
+precedence[TOKslice] = PREC_primary;
+precedence[TOKarray] = PREC_primary;
+precedence[TOKaddress] = PREC_unary;
+precedence[TOKstar] = PREC_unary;
+precedence[TOKneg] = PREC_unary;
+precedence[TOKuadd] = PREC_unary;
+precedence[TOKnot] = PREC_unary;
+precedence[TOKtobool] = PREC_add;
+precedence[TOKtilde] = PREC_unary;
+precedence[TOKdelete] = PREC_unary;
+precedence[TOKnew] = PREC_unary;
+precedence[TOKcast] = PREC_unary;
+precedence[TOKmul] = PREC_mul;
+precedence[TOKdiv] = PREC_mul;
+precedence[TOKmod] = PREC_mul;
+precedence[TOKadd] = PREC_add;
+precedence[TOKmin] = PREC_add;
+precedence[TOKcat] = PREC_add;
+precedence[TOKshl] = PREC_shift;
+precedence[TOKshr] = PREC_shift;
+precedence[TOKushr] = PREC_shift;
+precedence[TOKlt] = PREC_rel;
+precedence[TOKle] = PREC_rel;
+precedence[TOKgt] = PREC_rel;
+precedence[TOKge] = PREC_rel;
+precedence[TOKunord] = PREC_rel;
+precedence[TOKlg] = PREC_rel;
+precedence[TOKleg] = PREC_rel;
+precedence[TOKule] = PREC_rel;
+precedence[TOKul] = PREC_rel;
+precedence[TOKuge] = PREC_rel;
+precedence[TOKug] = PREC_rel;
+precedence[TOKue] = PREC_rel;
+precedence[TOKin] = PREC_rel;
+precedence[TOKequal] = PREC_equal;
+precedence[TOKnotequal] = PREC_equal;
+precedence[TOKidentity] = PREC_equal;
+precedence[TOKnotidentity] = PREC_equal;
+precedence[TOKand] = PREC_and;
+precedence[TOKxor] = PREC_xor;
+precedence[TOKor] = PREC_or;
+precedence[TOKandand] = PREC_andand;
+precedence[TOKoror] = PREC_oror;
+precedence[TOKquestion] = PREC_cond;
+precedence[TOKassign] = PREC_assign;
+precedence[TOKaddass] = PREC_assign;
+precedence[TOKminass] = PREC_assign;
+precedence[TOKcatass] = PREC_assign;
+precedence[TOKmulass] = PREC_assign;
+precedence[TOKdivass] = PREC_assign;
+precedence[TOKmodass] = PREC_assign;
+precedence[TOKshlass] = PREC_assign;
+precedence[TOKshrass] = PREC_assign;
+precedence[TOKushrass] = PREC_assign;
+precedence[TOKandass] = PREC_assign;
+precedence[TOKorass] = PREC_assign;
+precedence[TOKxorass] = PREC_assign;
+precedence[TOKcomma] = PREC_expr;
+}
+/*****************************************
+* Determine if 'this' is available.
+* If it is, return the FuncDeclaration that has it.
+*/
+FuncDeclaration *hasThis(Scope *sc)
+{   FuncDeclaration *fd;
+FuncDeclaration *fdthis;
+//printf("hasThis()\n");
+fdthis = sc->parent->isFuncDeclaration();
+//printf("fdthis = %p, '%s'\n", fdthis, fdthis ? fdthis->toChars() : "");
+// Go upwards until we find the enclosing member function
+fd = fdthis;
+while (1)
+{
+	if (!fd)
+	{
+	    goto Lno;
+	}
+	if (!fd->isNested())
+	    break;
+	Dsymbol *parent = fd->parent;
+	while (parent)
+	{
+	    TemplateInstance *ti = parent->isTemplateInstance();
+	    if (ti)
+		parent = ti->parent;
+	    else
+		break;
+	}
+	fd = fd->parent->isFuncDeclaration();
+}
+if (!fd->isThis())
+{   //printf("test '%s'\n", fd->toChars());
+	goto Lno;
+}
+assert(fd->vthis);
+return fd;
+Lno:
+return NULL;		// don't have 'this' available
+}
+/***************************************
+* Pull out any properties.
+*/
+Expression *resolveProperties(Scope *sc, Expression *e)
+{
+//printf("resolveProperties(%s)\n", e->toChars());
+if (e->type)
+{
+	Type *t = e->type->toBasetype();
+	if (t->ty == Tfunction)
+	{
+	    e = new CallExp(e->loc, e);
+	    e = e->semantic(sc);
+	}
+	/* Look for e being a lazy parameter; rewrite as delegate call
+	 */
+	else if (e->op == TOKvar)
+	{   VarExp *ve = (VarExp *)e;
+	    if (ve->var->storage_class & STClazy)
+	    {
+		e = new CallExp(e->loc, e);
+		e = e->semantic(sc);
+	    }
+	}
+	else if (e->op == TOKdotexp)
+	{
+	    e->error("expression has no value");
+	}
+}
+return e;
+}
+/******************************
+* Perform semantic() on an array of Expressions.
+*/
+void arrayExpressionSemantic(Expressions *exps, Scope *sc)
+{
+if (exps)
+{
+	for (size_t i = 0; i < exps->dim; i++)
+	{   Expression *e = (Expression *)exps->data[i];
+	    e = e->semantic(sc);
+	    exps->data[i] = (void *)e;
+	}
+}
+}
+/****************************************
+* Expand tuples.
+*/
+void expandTuples(Expressions *exps)
+{
+//printf("expandTuples()\n");
+if (exps)
+{
+	for (size_t i = 0; i < exps->dim; i++)
+	{   Expression *arg = (Expression *)exps->data[i];
+	    if (!arg)
+		continue;
+	    // Look for tuple with 0 members
+	    if (arg->op == TOKtype)
+	    {	TypeExp *e = (TypeExp *)arg;
+		if (e->type->toBasetype()->ty == Ttuple)
+		{   TypeTuple *tt = (TypeTuple *)e->type->toBasetype();
+		    if (!tt->arguments || tt->arguments->dim == 0)
+		    {
+			exps->remove(i);
+			if (i == exps->dim)
+			    return;
+			i--;
+			continue;
+		    }
+		}
+	    }
+	    // Inline expand all the tuples
+	    while (arg->op == TOKtuple)
+	    {	TupleExp *te = (TupleExp *)arg;
+		exps->remove(i);		// remove arg
+		exps->insert(i, te->exps);	// replace with tuple contents
+		if (i == exps->dim)
+		    return;		// empty tuple, no more arguments
+		arg = (Expression *)exps->data[i];
+	    }
+	}
+}
+}
+/****************************************
+* Preprocess arguments to function.
+*/
+void preFunctionArguments(Loc loc, Scope *sc, Expressions *exps)
+{
+if (exps)
+{
+	expandTuples(exps);
+	for (size_t i = 0; i < exps->dim; i++)
+	{   Expression *arg = (Expression *)exps->data[i];
+	    if (!arg->type)
+	    {
+#ifdef DEBUG
+		if (!global.gag)
+		    printf("1: \n");
+#endif
+		arg->error("%s is not an expression", arg->toChars());
+		arg = new IntegerExp(arg->loc, 0, Type::tint32);
+	    }
+	    arg = resolveProperties(sc, arg);
+	    exps->data[i] = (void *) arg;
+	    //arg->rvalue();
+#if 0
+	    if (arg->type->ty == Tfunction)
+	    {
+		arg = new AddrExp(arg->loc, arg);
+		arg = arg->semantic(sc);
+		exps->data[i] = (void *) arg;
+	    }
+#endif
+	}
+}
+}
+/****************************************
+* Now that we know the exact type of the function we're calling,
+* the arguments[] need to be adjusted:
+*	1) implicitly convert argument to the corresponding parameter type
+*	2) add default arguments for any missing arguments
+*	3) do default promotions on arguments corresponding to ...
+*	4) add hidden _arguments[] argument
+*/
+void functionArguments(Loc loc, Scope *sc, TypeFunction *tf, Expressions *arguments)
+{
+unsigned n;
+int done;
+Type *tb;
+//printf("functionArguments()\n");
+assert(arguments);
+size_t nargs = arguments ? arguments->dim : 0;
+size_t nparams = Argument::dim(tf->parameters);
+if (nargs > nparams && tf->varargs == 0)
+	error(loc, "expected %zu arguments, not %zu", nparams, nargs);
+n = (nargs > nparams) ? nargs : nparams;	// n = max(nargs, nparams)
+done = 0;
+for (size_t i = 0; i < n; i++)
+{
+	Expression *arg;
+	if (i < nargs)
+	    arg = (Expression *)arguments->data[i];
+	else
+	    arg = NULL;
+	if (i < nparams)
+	{
+	    Argument *p = Argument::getNth(tf->parameters, i);
+	    if (!arg)
+	    {
+		if (!p->defaultArg)
+		{
+		    if (tf->varargs == 2 && i + 1 == nparams)
+			goto L2;
+		    error(loc, "expected %zu arguments, not %zu", nparams, nargs);
+		    break;
+		}
+		arg = p->defaultArg->copy();
+		arguments->push(arg);
+		nargs++;
+	    }
+	    if (tf->varargs == 2 && i + 1 == nparams)
+	    {
+		//printf("\t\tvarargs == 2, p->type = '%s'\n", p->type->toChars());
+		if (arg->implicitConvTo(p->type))
+		{
+		    if (nargs != nparams)
+		        error(loc, "expected %zu arguments, not %zu", nparams, nargs);
+		    goto L1;
+		}
+	     L2:
+		Type *tb = p->type->toBasetype();
+		Type *tret = p->isLazyArray();
+		switch (tb->ty)
+		{
+		    case Tsarray:
+		    case Tarray:
+		    {	// Create a static array variable v of type arg->type
+#ifdef IN_GCC
+			/* GCC 4.0 does not like zero length arrays used like
+			   this; pass a null array value instead. Could also
+			   just make a one-element array. */
+			if (nargs - i == 0)
+			{
+			    arg = new NullExp(loc);
+			    break;
+			}
+#endif
+			static int idn;
+			char name[10 + sizeof(idn)*3 + 1];
+			sprintf(name, "__arrayArg%d", ++idn);
+			Identifier *id = Lexer::idPool(name);
+			Type *t = new TypeSArray(tb->next, new IntegerExp(nargs - i));
+			t = t->semantic(loc, sc);
+			VarDeclaration *v = new VarDeclaration(loc, t, id, new VoidInitializer(loc));
+			v->semantic(sc);
+			v->parent = sc->parent;
+			//sc->insert(v);
+			Expression *c = new DeclarationExp(0, v);
+			c->type = v->type;
+			for (size_t u = i; u < nargs; u++)
+			{   Expression *a = (Expression *)arguments->data[u];
+			    if (tret && !tb->next->equals(a->type))
+				a = a->toDelegate(sc, tret);
+			    Expression *e = new VarExp(loc, v);
+			    e = new IndexExp(loc, e, new IntegerExp(u + 1 - nparams));
+			    e = new AssignExp(loc, e, a);
+			    if (c)
+				c = new CommaExp(loc, c, e);
+			    else
+				c = e;
+			}
+			arg = new VarExp(loc, v);
+			if (c)
+			    arg = new CommaExp(loc, c, arg);
+			break;
+		    }
+		    case Tclass:
+		    {	/* Set arg to be:
+			 *	new Tclass(arg0, arg1, ..., argn)
+			 */
+			Expressions *args = new Expressions();
+			args->setDim(nargs - i);
+			for (size_t u = i; u < nargs; u++)
+			    args->data[u - i] = arguments->data[u];
+			arg = new NewExp(loc, NULL, NULL, p->type, args);
+			break;
+		    }
+		    default:
+			if (!arg)
+			{   error(loc, "not enough arguments");
+			    return;
+		        }
+			break;
+		}
+		arg = arg->semantic(sc);
+		//printf("\targ = '%s'\n", arg->toChars());
+		arguments->setDim(i + 1);
+		done = 1;
+	    }
+	L1:
+	    if (!(p->storageClass & STClazy && p->type->ty == Tvoid))
+		arg = arg->implicitCastTo(sc, p->type);
+	    if (p->storageClass & (STCout | STCref))
+	    {
+		// BUG: should check that argument to ref is type 'invariant'
+		// BUG: assignments to ref should also be type 'invariant'
+		arg = arg->modifiableLvalue(sc, NULL);
+		//if (arg->op == TOKslice)
+		    //arg->error("cannot modify slice %s", arg->toChars());
+	    }
+	    // Convert static arrays to pointers
+	    tb = arg->type->toBasetype();
+	    if (tb->ty == Tsarray)
+	    {
+		arg = arg->checkToPointer();
+	    }
+	    // Convert lazy argument to a delegate
+	    if (p->storageClass & STClazy)
+	    {
+		arg = arg->toDelegate(sc, p->type);
+	    }
+	}
+	else
+	{
+	    // If not D linkage, do promotions
+	    if (tf->linkage != LINKd)
+	    {
+		// Promote bytes, words, etc., to ints
+		arg = arg->integralPromotions(sc);
+		// Promote floats to doubles
+		switch (arg->type->ty)
+		{
+		    case Tfloat32:
+			arg = arg->castTo(sc, Type::tfloat64);
+			break;
+		    case Timaginary32:
+			arg = arg->castTo(sc, Type::timaginary64);
+			break;
+		}
+	    }
+	    // Convert static arrays to dynamic arrays
+	    tb = arg->type->toBasetype();
+	    if (tb->ty == Tsarray)
+	    {	TypeSArray *ts = (TypeSArray *)tb;
+		Type *ta = tb->next->arrayOf();
+		if (ts->size(arg->loc) == 0)
+		{   arg = new NullExp(arg->loc);
+		    arg->type = ta;
+		}
+		else
+		    arg = arg->castTo(sc, ta);
+	    }
+	    arg->rvalue();
+	}
+	arg = arg->optimize(WANTvalue);
+	arguments->data[i] = (void *) arg;
+	if (done)
+	    break;
+}
+// If D linkage and variadic, add _arguments[] as first argument
+if (tf->linkage == LINKd && tf->varargs == 1)
+{
+	Expression *e;
+	e = createTypeInfoArray(sc, (Expression **)&arguments->data[nparams],
+		arguments->dim - nparams);
+	arguments->insert(0, e);
+}
+}
+/**************************************************
+* Write expression out to buf, but wrap it
+* in ( ) if its precedence is less than pr.
+*/
+void expToCBuffer(OutBuffer *buf, HdrGenState *hgs, Expression *e, enum PREC pr)
+{
+if (precedence[e->op] < pr)
+{
+	buf->writeByte('(');
+	e->toCBuffer(buf, hgs);
+	buf->writeByte(')');
+}
+else
+	e->toCBuffer(buf, hgs);
+}
+/**************************************************
+* Write out argument list to buf.
+*/
+void argsToCBuffer(OutBuffer *buf, Expressions *arguments, HdrGenState *hgs)
+{
+if (arguments)
+{
+	for (size_t i = 0; i < arguments->dim; i++)
+	{   Expression *arg = (Expression *)arguments->data[i];
+	    if (i)
+		buf->writeByte(',');
+	    expToCBuffer(buf, hgs, arg, PREC_assign);
+	}
+}
+}
+/**************************************************
+* Write out argument types to buf.
+*/
+void argExpTypesToCBuffer(OutBuffer *buf, Expressions *arguments, HdrGenState *hgs)
+{
+if (arguments)
+{	OutBuffer argbuf;
+	for (size_t i = 0; i < arguments->dim; i++)
+	{   Expression *arg = (Expression *)arguments->data[i];
+	    if (i)
+		buf->writeByte(',');
+	    argbuf.reset();
+	    arg->type->toCBuffer2(&argbuf, NULL, hgs);
+	    buf->write(&argbuf);
+	}
+}
+}
+/******************************** Expression **************************/
+Expression::Expression(Loc loc, enum TOK op, int size)
+: loc(loc)
+{
+this->loc = loc;
+this->op = op;
+this->size = size;
+type = NULL;
+}
+Expression *Expression::syntaxCopy()
+{
+//printf("Expression::syntaxCopy()\n");
+//dump(0);
+return copy();
+}
+/*********************************
+* Does *not* do a deep copy.
+*/
+Expression *Expression::copy()
+{
+Expression *e;
+if (!size)
+{
+#ifdef DEBUG
+	fprintf(stdmsg, "No expression copy for: %s\n", toChars());
+	printf("op = %d\n", op);
+	dump(0);
+#endif
+	assert(0);
+}
+e = (Expression *)mem.malloc(size);
+return (Expression *)memcpy(e, this, size);
+}
+/**************************
+* Semantically analyze Expression.
+* Determine types, fold constants, etc.
+*/
+Expression *Expression::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("Expression::semantic()\n");
+#endif
+if (type)
+	type = type->semantic(loc, sc);
+else
+	type = Type::tvoid;
+return this;
+}
+void Expression::print()
+{
+fprintf(stdmsg, "%s\n", toChars());
+fflush(stdmsg);
+}
+char *Expression::toChars()
+{   OutBuffer *buf;
+HdrGenState hgs;
+memset(&hgs, 0, sizeof(hgs));
+buf = new OutBuffer();
+toCBuffer(buf, &hgs);
+return buf->toChars();
+}
+void Expression::error(const char *format, ...)
+{
+va_list ap;
+va_start(ap, format);
+::verror(loc, format, ap);
+va_end( ap );
+}
+void Expression::rvalue()
+{
+if (type && type->toBasetype()->ty == Tvoid)
+{	error("expression %s is void and has no value", toChars());
+#if 0
+	dump(0);
+	halt();
+#endif
+}
+}
+Expression *Expression::combine(Expression *e1, Expression *e2)
+{
+if (e1)
+{
+	if (e2)
+	{
+	    e1 = new CommaExp(e1->loc, e1, e2);
+	    e1->type = e2->type;
+	}
+}
+else
+	e1 = e2;
+return e1;
+}
+integer_t Expression::toInteger()
+{
+//printf("Expression %s\n", Token::toChars(op));
+error("Integer constant expression expected instead of %s", toChars());
+return 0;
+}
+uinteger_t Expression::toUInteger()
+{
+//printf("Expression %s\n", Token::toChars(op));
+return (uinteger_t)toInteger();
+}
+real_t Expression::toReal()
+{
+error("Floating point constant expression expected instead of %s", toChars());
+return 0;
+}
+real_t Expression::toImaginary()
+{
+error("Floating point constant expression expected instead of %s", toChars());
+return 0;
+}
+complex_t Expression::toComplex()
+{
+error("Floating point constant expression expected instead of %s", toChars());
+#ifdef IN_GCC
+return complex_t(real_t(0)); // %% nicer
+#else
+return 0;
+#endif
+}
+void Expression::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(Token::toChars(op));
+}
+void Expression::toMangleBuffer(OutBuffer *buf)
+{
+error("expression %s is not a valid template value argument", toChars());
+}
+/*******************************
+* Give error if we're not an lvalue.
+* If we can, convert expression to be an lvalue.
+*/
+Expression *Expression::toLvalue(Scope *sc, Expression *e)
+{
+if (!e)
+	e = this;
+else if (!loc.filename)
+	loc = e->loc;
+error("%s is not an lvalue", e->toChars());
+return this;
+}
+Expression *Expression::modifiableLvalue(Scope *sc, Expression *e)
+{
+// See if this expression is a modifiable lvalue (i.e. not const)
+return toLvalue(sc, e);
+}
+/************************************
+* Detect cases where pointers to the stack can 'escape' the
+* lifetime of the stack frame.
+*/
+void Expression::checkEscape()
+{
+}
+void Expression::checkScalar()
+{
+if (!type->isscalar())
+	error("'%s' is not a scalar, it is a %s", toChars(), type->toChars());
+}
+void Expression::checkNoBool()
+{
+if (type->toBasetype()->ty == Tbool)
+	error("operation not allowed on bool '%s'", toChars());
+}
+Expression *Expression::checkIntegral()
+{
+if (!type->isintegral())
+{	error("'%s' is not of integral type, it is a %s", toChars(), type->toChars());
+	return new IntegerExp(0);
+}
+return this;
+}
+void Expression::checkArithmetic()
+{
+if (!type->isintegral() && !type->isfloating())
+	error("'%s' is not an arithmetic type", toChars());
+}
+void Expression::checkDeprecated(Scope *sc, Dsymbol *s)
+{
+s->checkDeprecated(loc, sc);
+}
+/********************************
+* Check for expressions that have no use.
+* Input:
+*	flag	0 not going to use the result, so issue error message if no
+*		  side effects
+*		1 the result of the expression is used, but still check
+*		  for useless subexpressions
+*		2 do not issue error messages, just return !=0 if expression
+*		  has side effects
+*/
+int Expression::checkSideEffect(int flag)
+{
+if (flag == 0)
+{	if (op == TOKimport)
+	{
+	    error("%s has no effect", toChars());
+	}
+	else
+	    error("%s has no effect in expression (%s)",
+		Token::toChars(op), toChars());
+}
+return 0;
+}
+/*****************************
+* Check that expression can be tested for true or false.
+*/
+Expression *Expression::checkToBoolean()
+{
+// Default is 'yes' - do nothing
+#ifdef DEBUG
+if (!type)
+	dump(0);
+#endif
+if (!type->checkBoolean())
+{
+	error("expression %s of type %s does not have a boolean value", toChars(), type->toChars());
+}
+return this;
+}
+/****************************
+*/
+Expression *Expression::checkToPointer()
+{
+Expression *e;
+Type *tb;
+//printf("Expression::checkToPointer()\n");
+e = this;
+// If C static array, convert to pointer
+tb = type->toBasetype();
+if (tb->ty == Tsarray)
+{	TypeSArray *ts = (TypeSArray *)tb;
+	if (ts->size(loc) == 0)
+	    e = new NullExp(loc);
+	else
+	    e = new AddrExp(loc, this);
+	e->type = tb->next->pointerTo();
+}
+return e;
+}
+/******************************
+* Take address of expression.
+*/
+Expression *Expression::addressOf(Scope *sc)
+{
+Expression *e;
+//printf("Expression::addressOf()\n");
+e = toLvalue(sc, NULL);
+e = new AddrExp(loc, e);
+e->type = type->pointerTo();
+return e;
+}
+/******************************
+* If this is a reference, dereference it.
+*/
+Expression *Expression::deref()
+{
+//printf("Expression::deref()\n");
+if (type->ty == Treference)
+{	Expression *e;
+	e = new PtrExp(loc, this);
+	e->type = type->next;
+	return e;
+}
+return this;
+}
+/********************************
+* Does this expression statically evaluate to a boolean TRUE or FALSE?
+*/
+int Expression::isBool(int result)
+{
+return FALSE;
+}
+/********************************
+* Does this expression result in either a 1 or a 0?
+*/
+int Expression::isBit()
+{
+return FALSE;
+}
+Expressions *Expression::arraySyntaxCopy(Expressions *exps)
+{   Expressions *a = NULL;
+if (exps)
+{
+	a = new Expressions();
+	a->setDim(exps->dim);
+	for (int i = 0; i < a->dim; i++)
+	{   Expression *e = (Expression *)exps->data[i];
+	    e = e->syntaxCopy();
+	    a->data[i] = e;
+	}
+}
+return a;
+}
+/******************************** IntegerExp **************************/
+IntegerExp::IntegerExp(Loc loc, integer_t value, Type *type)
+	: Expression(loc, TOKint64, sizeof(IntegerExp))
+{
+//printf("IntegerExp(value = %lld, type = '%s')\n", value, type ? type->toChars() : "");
+if (type && !type->isscalar())
+{
+	error("integral constant must be scalar type, not %s", type->toChars());
+	type = Type::terror;
+}
+this->type = type;
+this->value = value;
+}
+IntegerExp::IntegerExp(integer_t value)
+	: Expression(0, TOKint64, sizeof(IntegerExp))
+{
+this->type = Type::tint32;
+this->value = value;
+}
+int IntegerExp::equals(Object *o)
+{   IntegerExp *ne;
+if (this == o ||
+	(((Expression *)o)->op == TOKint64 &&
+	 ((ne = (IntegerExp *)o), type->equals(ne->type)) &&
+	 value == ne->value))
+	return 1;
+return 0;
+}
+char *IntegerExp::toChars()
+{
+#if 1
+return Expression::toChars();
+#else
+static char buffer[sizeof(value) * 3 + 1];
+sprintf(buffer, "%jd", value);
+return buffer;
+#endif
+}
+integer_t IntegerExp::toInteger()
+{   Type *t;
+t = type;
+while (t)
+{
+	switch (t->ty)
+	{
+	    case Tbit:
+	    case Tbool:		value = (value != 0);		break;
+	    case Tint8:		value = (d_int8)  value;	break;
+	    case Tchar:
+	    case Tuns8:		value = (d_uns8)  value;	break;
+	    case Tint16:	value = (d_int16) value;	break;
+	    case Twchar:
+	    case Tuns16:	value = (d_uns16) value;	break;
+	    case Tint32:	value = (d_int32) value;	break;
+	    case Tpointer:
+	    case Tdchar:
+	    case Tuns32:	value = (d_uns32) value;	break;
+	    case Tint64:	value = (d_int64) value;	break;
+	    case Tuns64:	value = (d_uns64) value;	break;
+	    case Tenum:
+	    {
+		TypeEnum *te = (TypeEnum *)t;
+		t = te->sym->memtype;
+		continue;
+	    }
+	    case Ttypedef:
+	    {
+		TypeTypedef *tt = (TypeTypedef *)t;
+		t = tt->sym->basetype;
+		continue;
+	    }
+	    default:
+		print();
+		type->print();
+		assert(0);
+		break;
+	}
+	break;
+}
+return value;
+}
+real_t IntegerExp::toReal()
+{
+Type *t;
+toInteger();
+t = type->toBasetype();
+if (t->ty == Tuns64)
+	return (real_t)(d_uns64)value;
+else
+	return (real_t)(d_int64)value;
+}
+real_t IntegerExp::toImaginary()
+{
+return (real_t) 0;
+}
+complex_t IntegerExp::toComplex()
+{
+return toReal();
+}
+int IntegerExp::isBool(int result)
+{
+return result ? value != 0 : value == 0;
+}
+Expression *IntegerExp::semantic(Scope *sc)
+{
+if (!type)
+{
+	// Determine what the type of this number is
+	integer_t number = value;
+	if (number & 0x8000000000000000LL)
+	    type = Type::tuns64;
+	else if (number & 0xFFFFFFFF80000000LL)
+	    type = Type::tint64;
+	else
+	    type = Type::tint32;
+}
+else
+{	type = type->semantic(loc, sc);
+}
+return this;
+}
+Expression *IntegerExp::toLvalue(Scope *sc, Expression *e)
+{
+if (!e)
+	e = this;
+else if (!loc.filename)
+	loc = e->loc;
+e->error("constant %s is not an lvalue", e->toChars());
+return this;
+}
+void IntegerExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+integer_t v = toInteger();
+if (type)
+{	Type *t = type;
+L1:
+	switch (t->ty)
+	{
+	    case Tenum:
+	    {   TypeEnum *te = (TypeEnum *)t;
+		buf->printf("cast(%s)", te->sym->toChars());
+		t = te->sym->memtype;
+		goto L1;
+	    }
+	    case Ttypedef:
+	    {	TypeTypedef *tt = (TypeTypedef *)t;
+		buf->printf("cast(%s)", tt->sym->toChars());
+		t = tt->sym->basetype;
+		goto L1;
+	    }
+	    case Twchar:	// BUG: need to cast(wchar)
+	    case Tdchar:	// BUG: need to cast(dchar)
+		if ((uinteger_t)v > 0xFF)
+		{
+		     buf->printf("'\\U%08x'", v);
+		     break;
+		}
+	    case Tchar:
+		if (v == '\'')
+		    buf->writestring("'\\''");
+		else if (isprint(v) && v != '\\')
+		    buf->printf("'%c'", (int)v);
+		else
+		    buf->printf("'\\x%02x'", (int)v);
+		break;
+	    case Tint8:
+		buf->writestring("cast(byte)");
+		goto L2;
+	    case Tint16:
+		buf->writestring("cast(short)");
+		goto L2;
+	    case Tint32:
+	    L2:
+		buf->printf("%d", (int)v);
+		break;
+	    case Tuns8:
+		buf->writestring("cast(ubyte)");
+		goto L3;
+	    case Tuns16:
+		buf->writestring("cast(ushort)");
+		goto L3;
+	    case Tuns32:
+	    L3:
+		buf->printf("%du", (unsigned)v);
+		break;
+	    case Tint64:
+		buf->printf("%jdL", v);
+		break;
+	    case Tuns64:
+		buf->printf("%juLU", v);
+		break;
+	    case Tbit:
+	    case Tbool:
+		buf->writestring((char *)(v ? "true" : "false"));
+		break;
+	    case Tpointer:
+		buf->writestring("cast(");
+		buf->writestring(t->toChars());
+		buf->writeByte(')');
+		goto L3;
+	    default:
+#ifdef DEBUG
+		t->print();
+#endif
+		assert(0);
+	}
+}
+else if (v & 0x8000000000000000LL)
+	buf->printf("0x%jx", v);
+else
+	buf->printf("%jd", v);
+}
+void IntegerExp::toMangleBuffer(OutBuffer *buf)
+{
+if ((sinteger_t)value < 0)
+	buf->printf("N%jd", -value);
+else
+	buf->printf("%jd", value);
+}
+/******************************** RealExp **************************/
+RealExp::RealExp(Loc loc, real_t value, Type *type)
+	: Expression(loc, TOKfloat64, sizeof(RealExp))
+{
+//printf("RealExp::RealExp(%Lg)\n", value);
+this->value = value;
+this->type = type;
+}
+char *RealExp::toChars()
+{
+static char buffer[sizeof(value) * 3 + 8 + 1 + 1];
+#ifdef IN_GCC
+value.format(buffer, sizeof(buffer));
+if (type->isimaginary())
+	strcat(buffer, "i");
+#else
+sprintf(buffer, type->isimaginary() ? "%Lgi" : "%Lg", value);
+#endif
+assert(strlen(buffer) < sizeof(buffer));
+return buffer;
+}
+integer_t RealExp::toInteger()
+{
+#ifdef IN_GCC
+return toReal().toInt();
+#else
+return (sinteger_t) toReal();
+#endif
+}
+uinteger_t RealExp::toUInteger()
+{
+#ifdef IN_GCC
+return (uinteger_t) toReal().toInt();
+#else
+return (uinteger_t) toReal();
+#endif
+}
+real_t RealExp::toReal()
+{
+return type->isreal() ? value : 0;
+}
+real_t RealExp::toImaginary()
+{
+return type->isreal() ? 0 : value;
+}
+complex_t RealExp::toComplex()
+{
+#ifdef __DMC__
+return toReal() + toImaginary() * I;
+#else
+return complex_t(toReal(), toImaginary());
+#endif
+}
+/********************************
+* Test to see if two reals are the same.
+* Regard NaN's as equivalent.
+* Regard +0 and -0 as different.
+*/
+int RealEquals(real_t x1, real_t x2)
+{
+return (isnan(x1) && isnan(x2)) ||
+	/* In some cases, the REALPAD bytes get garbage in them,
+	 * so be sure and ignore them.
+	 */
+	memcmp(&x1, &x2, REALSIZE - REALPAD) == 0;
+}
+int RealExp::equals(Object *o)
+{   RealExp *ne;
+if (this == o ||
+	(((Expression *)o)->op == TOKfloat64 &&
+	 ((ne = (RealExp *)o), type->equals(ne->type)) &&
+	 RealEquals(value, ne->value)
+)
+)
+	return 1;
+return 0;
+}
+Expression *RealExp::semantic(Scope *sc)
+{
+if (!type)
+	type = Type::tfloat64;
+else
+	type = type->semantic(loc, sc);
+return this;
+}
+int RealExp::isBool(int result)
+{
+#ifdef IN_GCC
+return result ? (! value.isZero()) : (value.isZero());
+#else
+return result ? (value != 0)
+		  : (value == 0);
+#endif
+}
+void floatToBuffer(OutBuffer *buf, Type *type, real_t value)
+{
+/* In order to get an exact representation, try converting it
+* to decimal then back again. If it matches, use it.
+* If it doesn't, fall back to hex, which is
+* always exact.
+*/
+char buffer[25];
+sprintf(buffer, "%Lg", value);
+assert(strlen(buffer) < sizeof(buffer));
+#if _WIN32 && __DMC__
+char *save = __locale_decpoint;
+__locale_decpoint = ".";
+real_t r = strtold(buffer, NULL);
+__locale_decpoint = save;
+#else
+real_t r = strtold(buffer, NULL);
+#endif
+if (r == value)			// if exact duplication
+	buf->writestring(buffer);
+else
+	buf->printf("%La", value);	// ensure exact duplication
+if (type)
+{
+	Type *t = type->toBasetype();
+	switch (t->ty)
+	{
+	    case Tfloat32:
+	    case Timaginary32:
+	    case Tcomplex32:
+		buf->writeByte('F');
+		break;
+	    case Tfloat80:
+	    case Timaginary80:
+	    case Tcomplex80:
+		buf->writeByte('L');
+		break;
+	    default:
+		break;
+	}
+	if (t->isimaginary())
+	    buf->writeByte('i');
+}
+}
+void RealExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+floatToBuffer(buf, type, value);
+}
+void realToMangleBuffer(OutBuffer *buf, real_t value)
+{
+/* Rely on %A to get portable mangling.
+* Must munge result to get only identifier characters.
+*
+* Possible values from %A	=> mangled result
+* NAN			=> NAN
+* -INF			=> NINF
+* INF			=> INF
+* -0X1.1BC18BA997B95P+79	=> N11BC18BA997B95P79
+* 0X1.9P+2			=> 19P2
+*/
+if (isnan(value))
+	buf->writestring("NAN");	// no -NAN bugs
+else
+{
+	char buffer[32];
+	int n = sprintf(buffer, "%LA", value);
+	assert(n > 0 && n < sizeof(buffer));
+	for (int i = 0; i < n; i++)
+	{   char c = buffer[i];
+	    switch (c)
+	    {
+		case '-':
+		    buf->writeByte('N');
+		    break;
+		case '+':
+		case 'X':
+		case '.':
+		    break;
+		case '0':
+		    if (i < 2)
+			break;		// skip leading 0X
+		default:
+		    buf->writeByte(c);
+		    break;
+	    }
+	}
+}
+}
+void RealExp::toMangleBuffer(OutBuffer *buf)
+{
+buf->writeByte('e');
+realToMangleBuffer(buf, value);
+}
+/******************************** ComplexExp **************************/
+ComplexExp::ComplexExp(Loc loc, complex_t value, Type *type)
+	: Expression(loc, TOKcomplex80, sizeof(ComplexExp))
+{
+this->value = value;
+this->type = type;
+//printf("ComplexExp::ComplexExp(%s)\n", toChars());
+}
+char *ComplexExp::toChars()
+{
+static char buffer[sizeof(value) * 3 + 8 + 1];
+#ifdef IN_GCC
+char buf1[sizeof(value) * 3 + 8 + 1];
+char buf2[sizeof(value) * 3 + 8 + 1];
+creall(value).format(buf1, sizeof(buf1));
+cimagl(value).format(buf2, sizeof(buf2));
+sprintf(buffer, "(%s+%si)", buf1, buf2);
+#else
+sprintf(buffer, "(%Lg+%Lgi)", creall(value), cimagl(value));
+assert(strlen(buffer) < sizeof(buffer));
+#endif
+return buffer;
+}
+integer_t ComplexExp::toInteger()
+{
+#ifdef IN_GCC
+return (sinteger_t) toReal().toInt();
+#else
+return (sinteger_t) toReal();
+#endif
+}
+uinteger_t ComplexExp::toUInteger()
+{
+#ifdef IN_GCC
+return (uinteger_t) toReal().toInt();
+#else
+return (uinteger_t) toReal();
+#endif
+}
+real_t ComplexExp::toReal()
+{
+return creall(value);
+}
+real_t ComplexExp::toImaginary()
+{
+return cimagl(value);
+}
+complex_t ComplexExp::toComplex()
+{
+return value;
+}
+int ComplexExp::equals(Object *o)
+{   ComplexExp *ne;
+if (this == o ||
+	(((Expression *)o)->op == TOKcomplex80 &&
+	 ((ne = (ComplexExp *)o), type->equals(ne->type)) &&
+	 RealEquals(creall(value), creall(ne->value)) &&
+	 RealEquals(cimagl(value), cimagl(ne->value))
+	)
+)
+	return 1;
+return 0;
+}
+Expression *ComplexExp::semantic(Scope *sc)
+{
+if (!type)
+	type = Type::tcomplex80;
+else
+	type = type->semantic(loc, sc);
+return this;
+}
+int ComplexExp::isBool(int result)
+{
+if (result)
+	return (bool)(value);
+else
+	return !value;
+}
+void ComplexExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+/* Print as:
+*  (re+imi)
+*/
+#ifdef IN_GCC
+char buf1[sizeof(value) * 3 + 8 + 1];
+char buf2[sizeof(value) * 3 + 8 + 1];
+creall(value).format(buf1, sizeof(buf1));
+cimagl(value).format(buf2, sizeof(buf2));
+buf->printf("(%s+%si)", buf1, buf2);
+#else
+buf->writeByte('(');
+floatToBuffer(buf, type, creall(value));
+buf->writeByte('+');
+floatToBuffer(buf, type, cimagl(value));
+buf->writestring("i)");
+#endif
+}
+void ComplexExp::toMangleBuffer(OutBuffer *buf)
+{
+buf->writeByte('c');
+real_t r = toReal();
+realToMangleBuffer(buf, r);
+buf->writeByte('c');	// separate the two
+r = toImaginary();
+realToMangleBuffer(buf, r);
+}
+/******************************** IdentifierExp **************************/
+IdentifierExp::IdentifierExp(Loc loc, Identifier *ident)
+	: Expression(loc, TOKidentifier, sizeof(IdentifierExp))
+{
+this->ident = ident;
+}
+Expression *IdentifierExp::semantic(Scope *sc)
+{
+Dsymbol *s;
+Dsymbol *scopesym;
+#if LOGSEMANTIC
+printf("IdentifierExp::semantic('%s')\n", ident->toChars());
+#endif
+s = sc->search(loc, ident, &scopesym);
+if (s)
+{	Expression *e;
+	WithScopeSymbol *withsym;
+	// See if it was a with class
+	withsym = scopesym->isWithScopeSymbol();
+	if (withsym)
+	{
+	    s = s->toAlias();
+	    // Same as wthis.ident
+	    if (s->needThis() || s->isTemplateDeclaration())
+	    {
+		e = new VarExp(loc, withsym->withstate->wthis);
+		e = new DotIdExp(loc, e, ident);
+	    }
+	    else
+	    {	Type *t = withsym->withstate->wthis->type;
+		if (t->ty == Tpointer)
+		    t = t->next;
+		e = new TypeDotIdExp(loc, t, ident);
+	    }
+	}
+	else
+	{
+	    if (!s->parent && scopesym->isArrayScopeSymbol())
+	    {	// Kludge to run semantic() here because
+		// ArrayScopeSymbol::search() doesn't have access to sc.
+		s->semantic(sc);
+	    }
+	    // Look to see if f is really a function template
+	    FuncDeclaration *f = s->isFuncDeclaration();
+	    if (f && f->parent)
+	    {   TemplateInstance *ti = f->parent->isTemplateInstance();
+		if (ti &&
+		    !ti->isTemplateMixin() &&
+		    (ti->name == f->ident ||
+		     ti->toAlias()->ident == f->ident)
+		    &&
+		    ti->tempdecl && ti->tempdecl->onemember)
+		{
+		    TemplateDeclaration *tempdecl = ti->tempdecl;
+		    if (tempdecl->overroot)         // if not start of overloaded list of TemplateDeclaration's
+			tempdecl = tempdecl->overroot; // then get the start
+		    e = new TemplateExp(loc, tempdecl);
+		    e = e->semantic(sc);
+		    return e;
+		}
+	    }
+	    e = new DsymbolExp(loc, s);
+	}
+	return e->semantic(sc);
+}
+error("undefined identifier %s", ident->toChars());
+type = Type::terror;
+return this;
+}
+char *IdentifierExp::toChars()
+{
+return ident->toChars();
+}
+void IdentifierExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+if (hgs->hdrgen)
+	buf->writestring(ident->toHChars2());
+else
+	buf->writestring(ident->toChars());
+}
+Expression *IdentifierExp::toLvalue(Scope *sc, Expression *e)
+{
+#if 0
+tym = tybasic(e1->ET->Tty);
+if (!(tyscalar(tym) ||
+	  tym == TYstruct ||
+	  tym == TYarray && e->Eoper == TOKaddr))
+	    synerr(EM_lvalue);	// lvalue expected
+#endif
+return this;
+}
+/******************************** DollarExp **************************/
+DollarExp::DollarExp(Loc loc)
+	: IdentifierExp(loc, Id::dollar)
+{
+}
+/******************************** DsymbolExp **************************/
+DsymbolExp::DsymbolExp(Loc loc, Dsymbol *s)
+	: Expression(loc, TOKdsymbol, sizeof(DsymbolExp))
+{
+this->s = s;
+}
+Expression *DsymbolExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("DsymbolExp::semantic('%s')\n", s->toChars());
+#endif
+Lagain:
+EnumMember *em;
+Expression *e;
+VarDeclaration *v;
+FuncDeclaration *f;
+FuncLiteralDeclaration *fld;
+Declaration *d;
+ClassDeclaration *cd;
+ClassDeclaration *thiscd = NULL;
+Import *imp;
+Package *pkg;
+Type *t;
+//printf("DsymbolExp:: %p '%s' is a symbol\n", this, toChars());
+//printf("s = '%s', s->kind = '%s'\n", s->toChars(), s->kind());
+if (type)
+	return this;
+if (!s->isFuncDeclaration())	// functions are checked after overloading
+	checkDeprecated(sc, s);
+s = s->toAlias();
+//printf("s = '%s', s->kind = '%s', s->needThis() = %p\n", s->toChars(), s->kind(), s->needThis());
+if (!s->isFuncDeclaration())
+	checkDeprecated(sc, s);
+if (sc->func)
+	thiscd = sc->func->parent->isClassDeclaration();
+// BUG: This should happen after overload resolution for functions, not before
+if (s->needThis())
+{
+	if (hasThis(sc) /*&& !s->isFuncDeclaration()*/)
+	{
+	    // Supply an implicit 'this', as in
+	    //	  this.ident
+	    DotVarExp *de;
+	    de = new DotVarExp(loc, new ThisExp(loc), s->isDeclaration());
+	    return de->semantic(sc);
+	}
+}
+em = s->isEnumMember();
+if (em)
+{
+	e = em->value;
+	e = e->semantic(sc);
+	return e;
+}
+v = s->isVarDeclaration();
+if (v)
+{
+	//printf("Identifier '%s' is a variable, type '%s'\n", toChars(), v->type->toChars());
+	if (!type)
+	{   type = v->type;
+	    if (!v->type)
+	    {	error("forward reference of %s", v->toChars());
+		type = Type::terror;
+	    }
+	}
+	if (v->isConst() && type->toBasetype()->ty != Tsarray)
+	{
+	    if (v->init)
+	    {
+		if (v->inuse)
+		{
+		    error("circular reference to '%s'", v->toChars());
+		    type = Type::tint32;
+		    return this;
+		}
+		ExpInitializer *ei = v->init->isExpInitializer();
+		if (ei)
+		{
+		    e = ei->exp->copy();	// make copy so we can change loc
+		    if (e->op == TOKstring || !e->type)
+			e = e->semantic(sc);
+		    e = e->implicitCastTo(sc, type);
+		    e->loc = loc;
+		    return e;
+		}
+	    }
+	    else
+	    {
+		e = type->defaultInit();
+		e->loc = loc;
+		return e;
+	    }
+	}
+	e = new VarExp(loc, v);
+	e->type = type;
+	e = e->semantic(sc);
+	return e->deref();
+}
+fld = s->isFuncLiteralDeclaration();
+if (fld)
+{	//printf("'%s' is a function literal\n", fld->toChars());
+	e = new FuncExp(loc, fld);
+	return e->semantic(sc);
+}
+f = s->isFuncDeclaration();
+if (f)
+{	//printf("'%s' is a function\n", f->toChars());
+	return new VarExp(loc, f);
+}
+cd = s->isClassDeclaration();
+if (cd && thiscd && cd->isBaseOf(thiscd, NULL) && sc->func->needThis())
+{
+	// We need to add an implicit 'this' if cd is this class or a base class.
+	DotTypeExp *dte;
+	dte = new DotTypeExp(loc, new ThisExp(loc), s);
+	return dte->semantic(sc);
+}
+imp = s->isImport();
+if (imp)
+{
+	ScopeExp *ie;
+	ie = new ScopeExp(loc, imp->pkg);
+	return ie->semantic(sc);
+}
+pkg = s->isPackage();
+if (pkg)
+{
+	ScopeExp *ie;
+	ie = new ScopeExp(loc, pkg);
+	return ie->semantic(sc);
+}
+Module *mod = s->isModule();
+if (mod)
+{
+	ScopeExp *ie;
+	ie = new ScopeExp(loc, mod);
+	return ie->semantic(sc);
+}
+t = s->getType();
+if (t)
+{
+	return new TypeExp(loc, t);
+}
+TupleDeclaration *tup = s->isTupleDeclaration();
+if (tup)
+{
+	e = new TupleExp(loc, tup);
+	e = e->semantic(sc);
+	return e;
+}
+TemplateInstance *ti = s->isTemplateInstance();
+if (ti && !global.errors)
+{   if (!ti->semanticdone)
+	    ti->semantic(sc);
+	s = ti->inst->toAlias();
+	if (!s->isTemplateInstance())
+	    goto Lagain;
+	e = new ScopeExp(loc, ti);
+	e = e->semantic(sc);
+	return e;
+}
+TemplateDeclaration *td = s->isTemplateDeclaration();
+if (td)
+{
+	e = new TemplateExp(loc, td);
+	e = e->semantic(sc);
+	return e;
+}
+Lerr:
+error("%s '%s' is not a variable", s->kind(), s->toChars());
+type = Type::terror;
+return this;
+}
+char *DsymbolExp::toChars()
+{
+return s->toChars();
+}
+void DsymbolExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(s->toChars());
+}
+Expression *DsymbolExp::toLvalue(Scope *sc, Expression *e)
+{
+#if 0
+tym = tybasic(e1->ET->Tty);
+if (!(tyscalar(tym) ||
+	  tym == TYstruct ||
+	  tym == TYarray && e->Eoper == TOKaddr))
+	    synerr(EM_lvalue);	// lvalue expected
+#endif
+return this;
+}
+/******************************** ThisExp **************************/
+ThisExp::ThisExp(Loc loc)
+	: Expression(loc, TOKthis, sizeof(ThisExp))
+{
+var = NULL;
+}
+Expression *ThisExp::semantic(Scope *sc)
+{   FuncDeclaration *fd;
+FuncDeclaration *fdthis;
+int nested = 0;
+#if LOGSEMANTIC
+printf("ThisExp::semantic()\n");
+#endif
+if (type)
+{	//assert(global.errors || var);
+	return this;
+}
+/* Special case for typeof(this) and typeof(super) since both
+* should work even if they are not inside a non-static member function
+*/
+if (sc->intypeof)
+{
+	// Find enclosing struct or class
+	for (Dsymbol *s = sc->parent; 1; s = s->parent)
+	{
+	    ClassDeclaration *cd;
+	    StructDeclaration *sd;
+	    if (!s)
+	    {
+		error("%s is not in a struct or class scope", toChars());
+		goto Lerr;
+	    }
+	    cd = s->isClassDeclaration();
+	    if (cd)
+	    {
+		type = cd->type;
+		return this;
+	    }
+	    sd = s->isStructDeclaration();
+	    if (sd)
+	    {
+		type = sd->type->pointerTo();
+		return this;
+	    }
+	}
+}
+fdthis = sc->parent->isFuncDeclaration();
+fd = hasThis(sc);	// fd is the uplevel function with the 'this' variable
+if (!fd)
+	goto Lerr;
+assert(fd->vthis);
+var = fd->vthis;
+assert(var->parent);
+type = var->type;
+var->isVarDeclaration()->checkNestedReference(sc, loc);
+#if 0
+if (fd != fdthis)		// if nested
+{
+	fdthis->getLevel(loc, fd);
+	fd->vthis->nestedref = 1;
+	fd->nestedFrameRef = 1;
+}
+#endif
+sc->callSuper |= CSXthis;
+return this;
+Lerr:
+error("'this' is only allowed in non-static member functions, not %s", sc->parent->toChars());
+type = Type::tint32;
+return this;
+}
+int ThisExp::isBool(int result)
+{
+return result ? TRUE : FALSE;
+}
+void ThisExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("this");
+}
+Expression *ThisExp::toLvalue(Scope *sc, Expression *e)
+{
+return this;
+}
+/******************************** SuperExp **************************/
+SuperExp::SuperExp(Loc loc)
+	: ThisExp(loc)
+{
+op = TOKsuper;
+}
+Expression *SuperExp::semantic(Scope *sc)
+{   FuncDeclaration *fd;
+FuncDeclaration *fdthis;
+ClassDeclaration *cd;
+Dsymbol *s;
+#if LOGSEMANTIC
+printf("SuperExp::semantic('%s')\n", toChars());
+#endif
+if (type)
+	return this;
+/* Special case for typeof(this) and typeof(super) since both
+* should work even if they are not inside a non-static member function
+*/
+if (sc->intypeof)
+{
+	// Find enclosing class
+	for (Dsymbol *s = sc->parent; 1; s = s->parent)
+	{
+	    ClassDeclaration *cd;
+	    if (!s)
+	    {
+		error("%s is not in a class scope", toChars());
+		goto Lerr;
+	    }
+	    cd = s->isClassDeclaration();
+	    if (cd)
+	    {
+		cd = cd->baseClass;
+		if (!cd)
+		{   error("class %s has no 'super'", s->toChars());
+		    goto Lerr;
+		}
+		type = cd->type;
+		return this;
+	    }
+	}
+}
+fdthis = sc->parent->isFuncDeclaration();
+fd = hasThis(sc);
+if (!fd)
+	goto Lerr;
+assert(fd->vthis);
+var = fd->vthis;
+assert(var->parent);
+s = fd->toParent();
+while (s && s->isTemplateInstance())
+	s = s->toParent();
+assert(s);
+cd = s->isClassDeclaration();
+//printf("parent is %s %s\n", fd->toParent()->kind(), fd->toParent()->toChars());
+if (!cd)
+	goto Lerr;
+if (!cd->baseClass)
+{
+	error("no base class for %s", cd->toChars());
+	type = fd->vthis->type;
+}
+else
+{
+	type = cd->baseClass->type;
+}
+var->isVarDeclaration()->checkNestedReference(sc, loc);
+#if 0
+if (fd != fdthis)
+{
+	fdthis->getLevel(loc, fd);
+	fd->vthis->nestedref = 1;
+	fd->nestedFrameRef = 1;
+}
+#endif
+sc->callSuper |= CSXsuper;
+return this;
+Lerr:
+error("'super' is only allowed in non-static class member functions");
+type = Type::tint32;
+return this;
+}
+void SuperExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("super");
+}
+/******************************** NullExp **************************/
+NullExp::NullExp(Loc loc)
+	: Expression(loc, TOKnull, sizeof(NullExp))
+{
+committed = 0;
+}
+Expression *NullExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("NullExp::semantic('%s')\n", toChars());
+#endif
+// NULL is the same as (void *)0
+if (!type)
+	type = Type::tvoid->pointerTo();
+return this;
+}
+int NullExp::isBool(int result)
+{
+return result ? FALSE : TRUE;
+}
+void NullExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("null");
+}
+void NullExp::toMangleBuffer(OutBuffer *buf)
+{
+buf->writeByte('n');
+}
+/******************************** StringExp **************************/
+StringExp::StringExp(Loc loc, char *string)
+	: Expression(loc, TOKstring, sizeof(StringExp))
+{
+this->string = string;
+this->len = strlen(string);
+this->sz = 1;
+this->committed = 0;
+this->postfix = 0;
+}
+StringExp::StringExp(Loc loc, void *string, size_t len)
+	: Expression(loc, TOKstring, sizeof(StringExp))
+{
+this->string = string;
+this->len = len;
+this->sz = 1;
+this->committed = 0;
+this->postfix = 0;
+}
+StringExp::StringExp(Loc loc, void *string, size_t len, unsigned char postfix)
+	: Expression(loc, TOKstring, sizeof(StringExp))
+{
+this->string = string;
+this->len = len;
+this->sz = 1;
+this->committed = 0;
+this->postfix = postfix;
+}
+#if 0
+Expression *StringExp::syntaxCopy()
+{
+printf("StringExp::syntaxCopy() %s\n", toChars());
+return copy();
+}
+#endif
+int StringExp::equals(Object *o)
+{
+//printf("StringExp::equals('%s')\n", o->toChars());
+if (o && o->dyncast() == DYNCAST_EXPRESSION)
+{	Expression *e = (Expression *)o;
+	if (e->op == TOKstring)
+	{
+	    return compare(o) == 0;
+	}
+}
+return FALSE;
+}
+char *StringExp::toChars()
+{
+OutBuffer buf;
+HdrGenState hgs;
+char *p;
+memset(&hgs, 0, sizeof(hgs));
+toCBuffer(&buf, &hgs);
+buf.writeByte(0);
+p = (char *)buf.data;
+buf.data = NULL;
+return p;
+}
+Expression *StringExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("StringExp::semantic() %s\n", toChars());
+#endif
+if (!type)
+{	OutBuffer buffer;
+	size_t newlen = 0;
+	char *p;
+	size_t u;
+	unsigned c;
+	switch (postfix)
+	{
+	    case 'd':
+		for (u = 0; u < len;)
+		{
+		    p = utf_decodeChar((unsigned char *)string, len, &u, &c);
+		    if (p)
+		    {	error("%s", p);
+			break;
+		    }
+		    else
+		    {	buffer.write4(c);
+			newlen++;
+		    }
+		}
+		buffer.write4(0);
+		string = buffer.extractData();
+		len = newlen;
+		sz = 4;
+		type = new TypeSArray(Type::tdchar, new IntegerExp(loc, len, Type::tindex));
+		committed = 1;
+		break;
+	    case 'w':
+		for (u = 0; u < len;)
+		{
+		    p = utf_decodeChar((unsigned char *)string, len, &u, &c);
+		    if (p)
+		    {	error("%s", p);
+			break;
+		    }
+		    else
+		    {	buffer.writeUTF16(c);
+			newlen++;
+			if (c >= 0x10000)
+			    newlen++;
+		    }
+		}
+		buffer.writeUTF16(0);
+		string = buffer.extractData();
+		len = newlen;
+		sz = 2;
+		type = new TypeSArray(Type::twchar, new IntegerExp(loc, len, Type::tindex));
+		committed = 1;
+		break;
+	    case 'c':
+		committed = 1;
+	    default:
+		type = new TypeSArray(Type::tchar, new IntegerExp(loc, len, Type::tindex));
+		break;
+	}
+	type = type->semantic(loc, sc);
+}
+return this;
+}
+/****************************************
+* Convert string to char[].
+*/
+StringExp *StringExp::toUTF8(Scope *sc)
+{
+if (sz != 1)
+{	// Convert to UTF-8 string
+	committed = 0;
+	Expression *e = castTo(sc, Type::tchar->arrayOf());
+	e = e->optimize(WANTvalue);
+	assert(e->op == TOKstring);
+	StringExp *se = (StringExp *)e;
+	assert(se->sz == 1);
+	return se;
+}
+return this;
+}
+int StringExp::compare(Object *obj)
+{
+// Used to sort case statement expressions so we can do an efficient lookup
+StringExp *se2 = (StringExp *)(obj);
+// This is a kludge so isExpression() in template.c will return 5
+// for StringExp's.
+if (!se2)
+	return 5;
+assert(se2->op == TOKstring);
+int len1 = len;
+int len2 = se2->len;
+if (len1 == len2)
+{
+	switch (sz)
+	{
+	    case 1:
+		return strcmp((char *)string, (char *)se2->string);
+	    case 2:
+	    {	unsigned u;
+		d_wchar *s1 = (d_wchar *)string;
+		d_wchar *s2 = (d_wchar *)se2->string;
+		for (u = 0; u < len; u++)
+		{
+		    if (s1[u] != s2[u])
+			return s1[u] - s2[u];
+		}
+	    }
+	    case 4:
+	    {	unsigned u;
+		d_dchar *s1 = (d_dchar *)string;
+		d_dchar *s2 = (d_dchar *)se2->string;
+		for (u = 0; u < len; u++)
+		{
+		    if (s1[u] != s2[u])
+			return s1[u] - s2[u];
+		}
+	    }
+	    break;
+	    default:
+		assert(0);
+	}
+}
+return len1 - len2;
+}
+int StringExp::isBool(int result)
+{
+return result ? TRUE : FALSE;
+}
+void StringExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writeByte('"');
+for (size_t i = 0; i < len; i++)
+{	unsigned c;
+	switch (sz)
+	{
+	    case 1:
+		c = ((unsigned char *)string)[i];
+		break;
+	    case 2:
+		c = ((unsigned short *)string)[i];
+		break;
+	    case 4:
+		c = ((unsigned *)string)[i];
+		break;
+	    default:
+		assert(0);
+	}
+	switch (c)
+	{
+	    case '"':
+	    case '\\':
+		if (!hgs->console)
+		    buf->writeByte('\\');
+	    default:
+		if (c <= 0xFF)
+		{   if (c <= 0x7F && (isprint(c) || hgs->console))
+			buf->writeByte(c);
+		    else
+			buf->printf("\\x%02x", c);
+		}
+		else if (c <= 0xFFFF)
+		    buf->printf("\\x%02x\\x%02x", c & 0xFF, c >> 8);
+		else
+		    buf->printf("\\x%02x\\x%02x\\x%02x\\x%02x",
+			c & 0xFF, (c >> 8) & 0xFF, (c >> 16) & 0xFF, c >> 24);
+		break;
+	}
+}
+buf->writeByte('"');
+if (postfix)
+	buf->writeByte(postfix);
+}
+void StringExp::toMangleBuffer(OutBuffer *buf)
+{   char m;
+OutBuffer tmp;
+char *p;
+unsigned c;
+size_t u;
+unsigned char *q;
+unsigned qlen;
+/* Write string in UTF-8 format
+*/
+switch (sz)
+{	case 1:
+	    m = 'a';
+	    q = (unsigned char *)string;
+	    qlen = len;
+	    break;
+	case 2:
+	    m = 'w';
+	    for (u = 0; u < len; )
+	    {
+p = utf_decodeWchar((unsigned short *)string, len, &u, &c);
+if (p)
+error("%s", p);
+else
+tmp.writeUTF8(c);
+	    }
+	    q = tmp.data;
+	    qlen = tmp.offset;
+	    break;
+	case 4:
+	    m = 'd';
+for (u = 0; u < len; u++)
+{
+c = ((unsigned *)string)[u];
+if (!utf_isValidDchar(c))
+error("invalid UCS-32 char \\U%08x", c);
+else
+tmp.writeUTF8(c);
+}
+	    q = tmp.data;
+	    qlen = tmp.offset;
+	    break;
+	default:
+	    assert(0);
+}
+buf->writeByte(m);
+buf->printf("%d_", qlen);
+for (size_t i = 0; i < qlen; i++)
+	buf->printf("%02x", q[i]);
+}
+/************************ ArrayLiteralExp ************************************/
+// [ e1, e2, e3, ... ]
+ArrayLiteralExp::ArrayLiteralExp(Loc loc, Expressions *elements)
+: Expression(loc, TOKarrayliteral, sizeof(ArrayLiteralExp))
+{
+this->elements = elements;
+}
+ArrayLiteralExp::ArrayLiteralExp(Loc loc, Expression *e)
+: Expression(loc, TOKarrayliteral, sizeof(ArrayLiteralExp))
+{
+elements = new Expressions;
+elements->push(e);
+}
+Expression *ArrayLiteralExp::syntaxCopy()
+{
+return new ArrayLiteralExp(loc, arraySyntaxCopy(elements));
+}
+Expression *ArrayLiteralExp::semantic(Scope *sc)
+{   Expression *e;
+Type *t0 = NULL;
+#if LOGSEMANTIC
+printf("ArrayLiteralExp::semantic('%s')\n", toChars());
+#endif
+// Run semantic() on each element
+for (int i = 0; i < elements->dim; i++)
+{	e = (Expression *)elements->data[i];
+	e = e->semantic(sc);
+	elements->data[i] = (void *)e;
+}
+expandTuples(elements);
+for (int i = 0; i < elements->dim; i++)
+{	e = (Expression *)elements->data[i];
+	if (!e->type)
+	    error("%s has no value", e->toChars());
+	e = resolveProperties(sc, e);
+	unsigned char committed = 1;
+	if (e->op == TOKstring)
+	    committed = ((StringExp *)e)->committed;
+	if (!t0)
+	{   t0 = e->type;
+	    // Convert any static arrays to dynamic arrays
+	    if (t0->ty == Tsarray)
+	    {
+		t0 = t0->next->arrayOf();
+		e = e->implicitCastTo(sc, t0);
+	    }
+	}
+	else
+	    e = e->implicitCastTo(sc, t0);
+	if (!committed && e->op == TOKstring)
+	{   StringExp *se = (StringExp *)e;
+	    se->committed = 0;
+	}
+	elements->data[i] = (void *)e;
+}
+if (!t0)
+	t0 = Type::tvoid;
+type = new TypeSArray(t0, new IntegerExp(elements->dim));
+type = type->semantic(loc, sc);
+return this;
+}
+int ArrayLiteralExp::checkSideEffect(int flag)
+{   int f = 0;
+for (size_t i = 0; i < elements->dim; i++)
+{	Expression *e = (Expression *)elements->data[i];
+	f |= e->checkSideEffect(2);
+}
+if (flag == 0 && f == 0)
+	Expression::checkSideEffect(0);
+return f;
+}
+int ArrayLiteralExp::isBool(int result)
+{
+size_t dim = elements ? elements->dim : 0;
+return result ? (dim != 0) : (dim == 0);
+}
+void ArrayLiteralExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writeByte('[');
+argsToCBuffer(buf, elements, hgs);
+buf->writeByte(']');
+}
+void ArrayLiteralExp::toMangleBuffer(OutBuffer *buf)
+{
+size_t dim = elements ? elements->dim : 0;
+buf->printf("A%u", dim);
+for (size_t i = 0; i < dim; i++)
+{	Expression *e = (Expression *)elements->data[i];
+	e->toMangleBuffer(buf);
+}
+}
+/************************ AssocArrayLiteralExp ************************************/
+// [ key0 : value0, key1 : value1, ... ]
+AssocArrayLiteralExp::AssocArrayLiteralExp(Loc loc,
+		Expressions *keys, Expressions *values)
+: Expression(loc, TOKassocarrayliteral, sizeof(AssocArrayLiteralExp))
+{
+assert(keys->dim == values->dim);
+this->keys = keys;
+this->values = values;
+}
+Expression *AssocArrayLiteralExp::syntaxCopy()
+{
+return new AssocArrayLiteralExp(loc,
+	arraySyntaxCopy(keys), arraySyntaxCopy(values));
+}
+Expression *AssocArrayLiteralExp::semantic(Scope *sc)
+{   Expression *e;
+Type *tkey = NULL;
+Type *tvalue = NULL;
+#if LOGSEMANTIC
+printf("AssocArrayLiteralExp::semantic('%s')\n", toChars());
+#endif
+// Run semantic() on each element
+for (size_t i = 0; i < keys->dim; i++)
+{	Expression *key = (Expression *)keys->data[i];
+	Expression *value = (Expression *)values->data[i];
+	key = key->semantic(sc);
+	value = value->semantic(sc);
+	keys->data[i] = (void *)key;
+	values->data[i] = (void *)value;
+}
+expandTuples(keys);
+expandTuples(values);
+if (keys->dim != values->dim)
+{
+	error("number of keys is %u, must match number of values %u", keys->dim, values->dim);
+	keys->setDim(0);
+	values->setDim(0);
+}
+for (size_t i = 0; i < keys->dim; i++)
+{	Expression *key = (Expression *)keys->data[i];
+	Expression *value = (Expression *)values->data[i];
+	if (!key->type)
+	    error("%s has no value", key->toChars());
+	if (!value->type)
+	    error("%s has no value", value->toChars());
+	key = resolveProperties(sc, key);
+	value = resolveProperties(sc, value);
+	if (!tkey)
+	    tkey = key->type;
+	else
+	    key = key->implicitCastTo(sc, tkey);
+	keys->data[i] = (void *)key;
+	if (!tvalue)
+	    tvalue = value->type;
+	else
+	    value = value->implicitCastTo(sc, tvalue);
+	values->data[i] = (void *)value;
+}
+if (!tkey)
+	tkey = Type::tvoid;
+if (!tvalue)
+	tvalue = Type::tvoid;
+type = new TypeAArray(tvalue, tkey);
+type = type->semantic(loc, sc);
+return this;
+}
+int AssocArrayLiteralExp::checkSideEffect(int flag)
+{   int f = 0;
+for (size_t i = 0; i < keys->dim; i++)
+{	Expression *key = (Expression *)keys->data[i];
+	Expression *value = (Expression *)values->data[i];
+	f |= key->checkSideEffect(2);
+	f |= value->checkSideEffect(2);
+}
+if (flag == 0 && f == 0)
+	Expression::checkSideEffect(0);
+return f;
+}
+int AssocArrayLiteralExp::isBool(int result)
+{
+size_t dim = keys->dim;
+return result ? (dim != 0) : (dim == 0);
+}
+void AssocArrayLiteralExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writeByte('[');
+for (size_t i = 0; i < keys->dim; i++)
+{	Expression *key = (Expression *)keys->data[i];
+	Expression *value = (Expression *)values->data[i];
+	if (i)
+	    buf->writeByte(',');
+	expToCBuffer(buf, hgs, key, PREC_assign);
+	buf->writeByte(':');
+	expToCBuffer(buf, hgs, value, PREC_assign);
+}
+buf->writeByte(']');
+}
+void AssocArrayLiteralExp::toMangleBuffer(OutBuffer *buf)
+{
+size_t dim = keys->dim;
+buf->printf("A%u", dim);
+for (size_t i = 0; i < dim; i++)
+{	Expression *key = (Expression *)keys->data[i];
+	Expression *value = (Expression *)values->data[i];
+	key->toMangleBuffer(buf);
+	value->toMangleBuffer(buf);
+}
+}
+/************************ StructLiteralExp ************************************/
+// sd( e1, e2, e3, ... )
+StructLiteralExp::StructLiteralExp(Loc loc, StructDeclaration *sd, Expressions *elements)
+: Expression(loc, TOKstructliteral, sizeof(StructLiteralExp))
+{
+this->sd = sd;
+this->elements = elements;
+this->sym = NULL;
+this->soffset = 0;
+this->fillHoles = 1;
+}
+Expression *StructLiteralExp::syntaxCopy()
+{
+return new StructLiteralExp(loc, sd, arraySyntaxCopy(elements));
+}
+Expression *StructLiteralExp::semantic(Scope *sc)
+{   Expression *e;
+#if LOGSEMANTIC
+printf("StructLiteralExp::semantic('%s')\n", toChars());
+#endif
+// Run semantic() on each element
+for (size_t i = 0; i < elements->dim; i++)
+{	e = (Expression *)elements->data[i];
+	if (!e)
+	    continue;
+	e = e->semantic(sc);
+	elements->data[i] = (void *)e;
+}
+expandTuples(elements);
+size_t offset = 0;
+for (size_t i = 0; i < elements->dim; i++)
+{	e = (Expression *)elements->data[i];
+	if (!e)
+	    continue;
+	if (!e->type)
+	    error("%s has no value", e->toChars());
+	e = resolveProperties(sc, e);
+	if (i >= sd->fields.dim)
+	{   error("more initializers than fields of %s", sd->toChars());
+	    break;
+	}
+	Dsymbol *s = (Dsymbol *)sd->fields.data[i];
+	VarDeclaration *v = s->isVarDeclaration();
+	assert(v);
+	if (v->offset < offset)
+	    error("overlapping initialization for %s", v->toChars());
+	offset = v->offset + v->type->size();
+	Type *telem = v->type;
+	while (!e->implicitConvTo(telem) && telem->toBasetype()->ty == Tsarray)
+	{   /* Static array initialization, as in:
+	     *	T[3][5] = e;
+	     */
+	    telem = telem->toBasetype()->nextOf();
+	}
+	e = e->implicitCastTo(sc, telem);
+	elements->data[i] = (void *)e;
+}
+/* Fill out remainder of elements[] with default initializers for fields[]
+*/
+for (size_t i = elements->dim; i < sd->fields.dim; i++)
+{	Dsymbol *s = (Dsymbol *)sd->fields.data[i];
+	VarDeclaration *v = s->isVarDeclaration();
+	assert(v);
+	if (v->offset < offset)
+	{   e = NULL;
+	    sd->hasUnions = 1;
+	}
+	else
+	{
+	    if (v->init)
+	    {   e = v->init->toExpression();
+		if (!e)
+		    error("cannot make expression out of initializer for %s", v->toChars());
+	    }
+	    else
+	    {	e = v->type->defaultInit();
+		e->loc = loc;
+	    }
+	    offset = v->offset + v->type->size();
+	}
+	elements->push(e);
+}
+type = sd->type;
+return this;
+}
+/**************************************
+* Gets expression at offset of type.
+* Returns NULL if not found.
+*/
+Expression *StructLiteralExp::getField(Type *type, unsigned offset)
+{   Expression *e = NULL;
+int i = getFieldIndex(type, offset);
+if (i != -1)
+{   e = (Expression *)elements->data[i];
+	if (e)
+	{
+	    e = e->copy();
+	    e->type = type;
+	}
+}
+return e;
+}
+/************************************
+* Get index of field.
+* Returns -1 if not found.
+*/
+int StructLiteralExp::getFieldIndex(Type *type, unsigned offset)
+{
+/* Find which field offset is by looking at the field offsets
+*/
+for (size_t i = 0; i < sd->fields.dim; i++)
+{
+	Dsymbol *s = (Dsymbol *)sd->fields.data[i];
+	VarDeclaration *v = s->isVarDeclaration();
+	assert(v);
+	if (offset == v->offset &&
+	    type->size() == v->type->size())
+	{   Expression *e = (Expression *)elements->data[i];
+	    if (e)
+	    {
+		return i;
+	    }
+	    break;
+	}
+}
+return -1;
+}
+Expression *StructLiteralExp::toLvalue(Scope *sc, Expression *e)
+{
+return this;
+}
+int StructLiteralExp::checkSideEffect(int flag)
+{   int f = 0;
+for (size_t i = 0; i < elements->dim; i++)
+{	Expression *e = (Expression *)elements->data[i];
+	if (!e)
+	    continue;
+	f |= e->checkSideEffect(2);
+}
+if (flag == 0 && f == 0)
+	Expression::checkSideEffect(0);
+return f;
+}
+void StructLiteralExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(sd->toChars());
+buf->writeByte('(');
+argsToCBuffer(buf, elements, hgs);
+buf->writeByte(')');
+}
+void StructLiteralExp::toMangleBuffer(OutBuffer *buf)
+{
+size_t dim = elements ? elements->dim : 0;
+buf->printf("S%u", dim);
+for (size_t i = 0; i < dim; i++)
+{	Expression *e = (Expression *)elements->data[i];
+	if (e)
+	    e->toMangleBuffer(buf);
+	else
+	    buf->writeByte('v');	// 'v' for void
+}
+}
+/************************ TypeDotIdExp ************************************/
+/* Things like:
+*	int.size
+*	foo.size
+*	(foo).size
+*	cast(foo).size
+*/
+TypeDotIdExp::TypeDotIdExp(Loc loc, Type *type, Identifier *ident)
+: Expression(loc, TOKtypedot, sizeof(TypeDotIdExp))
+{
+this->type = type;
+this->ident = ident;
+}
+Expression *TypeDotIdExp::syntaxCopy()
+{
+TypeDotIdExp *te = new TypeDotIdExp(loc, type->syntaxCopy(), ident);
+return te;
+}
+Expression *TypeDotIdExp::semantic(Scope *sc)
+{   Expression *e;
+#if LOGSEMANTIC
+printf("TypeDotIdExp::semantic()\n");
+#endif
+e = new DotIdExp(loc, new TypeExp(loc, type), ident);
+e = e->semantic(sc);
+return e;
+}
+void TypeDotIdExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writeByte('(');
+type->toCBuffer(buf, NULL, hgs);
+buf->writeByte(')');
+buf->writeByte('.');
+buf->writestring(ident->toChars());
+}
+/************************************************************/
+// Mainly just a placeholder
+TypeExp::TypeExp(Loc loc, Type *type)
+: Expression(loc, TOKtype, sizeof(TypeExp))
+{
+//printf("TypeExp::TypeExp(%s)\n", type->toChars());
+this->type = type;
+}
+Expression *TypeExp::semantic(Scope *sc)
+{
+//printf("TypeExp::semantic(%s)\n", type->toChars());
+type = type->semantic(loc, sc);
+return this;
+}
+void TypeExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+type->toCBuffer(buf, NULL, hgs);
+}
+/************************************************************/
+// Mainly just a placeholder
+ScopeExp::ScopeExp(Loc loc, ScopeDsymbol *pkg)
+: Expression(loc, TOKimport, sizeof(ScopeExp))
+{
+//printf("ScopeExp::ScopeExp(pkg = '%s')\n", pkg->toChars());
+//static int count; if (++count == 38) *(char*)0=0;
+this->sds = pkg;
+}
+Expression *ScopeExp::syntaxCopy()
+{
+ScopeExp *se = new ScopeExp(loc, (ScopeDsymbol *)sds->syntaxCopy(NULL));
+return se;
+}
+Expression *ScopeExp::semantic(Scope *sc)
+{
+TemplateInstance *ti;
+ScopeDsymbol *sds2;
+#if LOGSEMANTIC
+printf("+ScopeExp::semantic('%s')\n", toChars());
+#endif
+Lagain:
+ti = sds->isTemplateInstance();
+if (ti && !global.errors)
+{	Dsymbol *s;
+	if (!ti->semanticdone)
+	    ti->semantic(sc);
+	s = ti->inst->toAlias();
+	sds2 = s->isScopeDsymbol();
+	if (!sds2)
+	{   Expression *e;
+	    //printf("s = %s, '%s'\n", s->kind(), s->toChars());
+	    if (ti->withsym)
+	    {
+		// Same as wthis.s
+		e = new VarExp(loc, ti->withsym->withstate->wthis);
+		e = new DotVarExp(loc, e, s->isDeclaration());
+	    }
+	    else
+		e = new DsymbolExp(loc, s);
+	    e = e->semantic(sc);
+	    //printf("-1ScopeExp::semantic()\n");
+	    return e;
+	}
+	if (sds2 != sds)
+	{
+	    sds = sds2;
+	    goto Lagain;
+	}
+	//printf("sds = %s, '%s'\n", sds->kind(), sds->toChars());
+}
+else
+{
+	//printf("sds = %s, '%s'\n", sds->kind(), sds->toChars());
+	//printf("\tparent = '%s'\n", sds->parent->toChars());
+	sds->semantic(sc);
+}
+type = Type::tvoid;
+//printf("-2ScopeExp::semantic() %s\n", toChars());
+return this;
+}
+void ScopeExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+if (sds->isTemplateInstance())
+{
+sds->toCBuffer(buf, hgs);
+}
+else
+{
+	buf->writestring(sds->kind());
+	buf->writestring(" ");
+	buf->writestring(sds->toChars());
+}
+}
+/********************** TemplateExp **************************************/
+// Mainly just a placeholder
+TemplateExp::TemplateExp(Loc loc, TemplateDeclaration *td)
+: Expression(loc, TOKtemplate, sizeof(TemplateExp))
+{
+//printf("TemplateExp(): %s\n", td->toChars());
+this->td = td;
+}
+void TemplateExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(td->toChars());
+}
+void TemplateExp::rvalue()
+{
+error("template %s has no value", toChars());
+}
+/********************** NewExp **************************************/
+NewExp::NewExp(Loc loc, Expression *thisexp, Expressions *newargs,
+	Type *newtype, Expressions *arguments)
+: Expression(loc, TOKnew, sizeof(NewExp))
+{
+this->thisexp = thisexp;
+this->newargs = newargs;
+this->newtype = newtype;
+this->arguments = arguments;
+member = NULL;
+allocator = NULL;
+onstack = 0;
+}
+Expression *NewExp::syntaxCopy()
+{
+return new NewExp(loc,
+	thisexp ? thisexp->syntaxCopy() : NULL,
+	arraySyntaxCopy(newargs),
+	newtype->syntaxCopy(), arraySyntaxCopy(arguments));
+}
+Expression *NewExp::semantic(Scope *sc)
+{   int i;
+Type *tb;
+ClassDeclaration *cdthis = NULL;
+#if LOGSEMANTIC
+printf("NewExp::semantic() %s\n", toChars());
+if (thisexp)
+	printf("\tthisexp = %s\n", thisexp->toChars());
+printf("\tnewtype: %s\n", newtype->toChars());
+#endif
+if (type)			// if semantic() already run
+	return this;
+Lagain:
+if (thisexp)
+{	thisexp = thisexp->semantic(sc);
+	cdthis = thisexp->type->isClassHandle();
+	if (cdthis)
+	{
+	    sc = sc->push(cdthis);
+	    type = newtype->semantic(loc, sc);
+	    sc = sc->pop();
+	}
+	else
+	{
+	    error("'this' for nested class must be a class type, not %s", thisexp->type->toChars());
+	    type = newtype->semantic(loc, sc);
+	}
+}
+else
+	type = newtype->semantic(loc, sc);
+newtype = type;		// in case type gets cast to something else
+tb = type->toBasetype();
+//printf("tb: %s, deco = %s\n", tb->toChars(), tb->deco);
+arrayExpressionSemantic(newargs, sc);
+preFunctionArguments(loc, sc, newargs);
+arrayExpressionSemantic(arguments, sc);
+preFunctionArguments(loc, sc, arguments);
+if (thisexp && tb->ty != Tclass)
+	error("e.new is only for allocating nested classes, not %s", tb->toChars());
+if (tb->ty == Tclass)
+{	TypeFunction *tf;
+	TypeClass *tc = (TypeClass *)(tb);
+	ClassDeclaration *cd = tc->sym->isClassDeclaration();
+	if (cd->isInterfaceDeclaration())
+	    error("cannot create instance of interface %s", cd->toChars());
+	else if (cd->isAbstract())
+	    error("cannot create instance of abstract class %s", cd->toChars());
+	checkDeprecated(sc, cd);
+	if (cd->isNested())
+	{   /* We need a 'this' pointer for the nested class.
+	     * Ensure we have the right one.
+	     */
+	    Dsymbol *s = cd->toParent2();
+	    ClassDeclaration *cdn = s->isClassDeclaration();
+	    //printf("isNested, cdn = %s\n", cdn ? cdn->toChars() : "null");
+	    if (cdn)
+	    {
+		if (!cdthis)
+		{
+		    // Supply an implicit 'this' and try again
+		    thisexp = new ThisExp(loc);
+		    for (Dsymbol *sp = sc->parent; 1; sp = sp->parent)
+		    {	if (!sp)
+			{
+			    error("outer class %s 'this' needed to 'new' nested class %s", cdn->toChars(), cd->toChars());
+			    break;
+			}
+			ClassDeclaration *cdp = sp->isClassDeclaration();
+			if (!cdp)
+			    continue;
+			if (cdp == cdn || cdn->isBaseOf(cdp, NULL))
+			    break;
+			// Add a '.outer' and try again
+			thisexp = new DotIdExp(loc, thisexp, Id::outer);
+		    }
+		    if (!global.errors)
+			goto Lagain;
+		}
+		if (cdthis)
+		{
+		    //printf("cdthis = %s\n", cdthis->toChars());
+		    if (cdthis != cdn && !cdn->isBaseOf(cdthis, NULL))
+			error("'this' for nested class must be of type %s, not %s", cdn->toChars(), thisexp->type->toChars());
+		}
+#if 0
+		else
+		{
+		    for (Dsymbol *sf = sc->func; 1; sf= sf->toParent2()->isFuncDeclaration())
+		    {
+			if (!sf)
+			{
+			    error("outer class %s 'this' needed to 'new' nested class %s", cdn->toChars(), cd->toChars());
+			    break;
+			}
+			printf("sf = %s\n", sf->toChars());
+			AggregateDeclaration *ad = sf->isThis();
+			if (ad && (ad == cdn || cdn->isBaseOf(ad->isClassDeclaration(), NULL)))
+			    break;
+		    }
+		}
+#endif
+	    }
+	    else if (thisexp)
+		error("e.new is only for allocating nested classes");
+	}
+	else if (thisexp)
+	    error("e.new is only for allocating nested classes");
+	FuncDeclaration *f = cd->ctor;
+	if (f)
+	{
+	    assert(f);
+	    f = f->overloadResolve(loc, arguments);
+	    checkDeprecated(sc, f);
+	    member = f->isCtorDeclaration();
+	    assert(member);
+	    cd->accessCheck(loc, sc, member);
+	    tf = (TypeFunction *)f->type;
+	    type = tf->next;
+	    if (!arguments)
+		arguments = new Expressions();
+	    functionArguments(loc, sc, tf, arguments);
+	}
+	else
+	{
+	    if (arguments && arguments->dim)
+		error("no constructor for %s", cd->toChars());
+	}
+	if (cd->aggNew)
+	{   Expression *e;
+	    f = cd->aggNew;
+	    // Prepend the uint size argument to newargs[]
+	    e = new IntegerExp(loc, cd->size(loc), Type::tuns32);
+	    if (!newargs)
+		newargs = new Expressions();
+	    newargs->shift(e);
+	    f = f->overloadResolve(loc, newargs);
+	    allocator = f->isNewDeclaration();
+	    assert(allocator);
+	    tf = (TypeFunction *)f->type;
+	    functionArguments(loc, sc, tf, newargs);
+	}
+	else
+	{
+	    if (newargs && newargs->dim)
+		error("no allocator for %s", cd->toChars());
+	}
+}
+else if (tb->ty == Tstruct)
+{
+	TypeStruct *ts = (TypeStruct *)tb;
+	StructDeclaration *sd = ts->sym;
+	FuncDeclaration *f = sd->aggNew;
+	TypeFunction *tf;
+	if (arguments && arguments->dim)
+	    error("no constructor for %s", type->toChars());
+	if (f)
+	{
+	    Expression *e;
+	    // Prepend the uint size argument to newargs[]
+	    e = new IntegerExp(loc, sd->size(loc), Type::tuns32);
+	    if (!newargs)
+		newargs = new Expressions();
+	    newargs->shift(e);
+	    f = f->overloadResolve(loc, newargs);
+	    allocator = f->isNewDeclaration();
+	    assert(allocator);
+	    tf = (TypeFunction *)f->type;
+	    functionArguments(loc, sc, tf, newargs);
+	    e = new VarExp(loc, f);
+	    e = new CallExp(loc, e, newargs);
+	    e = e->semantic(sc);
+	    e->type = type->pointerTo();
+	    return e;
+	}
+	type = type->pointerTo();
+}
+else if (tb->ty == Tarray && (arguments && arguments->dim))
+{
+	for (size_t i = 0; i < arguments->dim; i++)
+	{
+	    if (tb->ty != Tarray)
+	    {	error("too many arguments for array");
+		arguments->dim = i;
+		break;
+	    }
+	    Expression *arg = (Expression *)arguments->data[i];
+	    arg = resolveProperties(sc, arg);
+	    arg = arg->implicitCastTo(sc, Type::tsize_t);
+	    if (arg->op == TOKint64 && (long long)arg->toInteger() < 0)
+		error("negative array index %s", arg->toChars());
+	    arguments->data[i] = (void *) arg;
+	    tb = tb->next->toBasetype();
+	}
+}
+else if (tb->isscalar())
+{
+	if (arguments && arguments->dim)
+	    error("no constructor for %s", type->toChars());
+	type = type->pointerTo();
+}
+else
+{
+	error("new can only create structs, dynamic arrays or class objects, not %s's", type->toChars());
+	type = type->pointerTo();
+}
+//printf("NewExp: '%s'\n", toChars());
+//printf("NewExp:type '%s'\n", type->toChars());
+return this;
+}
+int NewExp::checkSideEffect(int flag)
+{
+return 1;
+}
+void NewExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{   int i;
+if (thisexp)
+{	expToCBuffer(buf, hgs, thisexp, PREC_primary);
+	buf->writeByte('.');
+}
+buf->writestring("new ");
+if (newargs && newargs->dim)
+{
+	buf->writeByte('(');
+	argsToCBuffer(buf, newargs, hgs);
+	buf->writeByte(')');
+}
+newtype->toCBuffer(buf, NULL, hgs);
+if (arguments && arguments->dim)
+{
+	buf->writeByte('(');
+	argsToCBuffer(buf, arguments, hgs);
+	buf->writeByte(')');
+}
+}
+/********************** NewAnonClassExp **************************************/
+NewAnonClassExp::NewAnonClassExp(Loc loc, Expression *thisexp,
+	Expressions *newargs, ClassDeclaration *cd, Expressions *arguments)
+: Expression(loc, TOKnewanonclass, sizeof(NewAnonClassExp))
+{
+this->thisexp = thisexp;
+this->newargs = newargs;
+this->cd = cd;
+this->arguments = arguments;
+}
+Expression *NewAnonClassExp::syntaxCopy()
+{
+return new NewAnonClassExp(loc,
+	thisexp ? thisexp->syntaxCopy() : NULL,
+	arraySyntaxCopy(newargs),
+	(ClassDeclaration *)cd->syntaxCopy(NULL),
+	arraySyntaxCopy(arguments));
+}
+Expression *NewAnonClassExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("NewAnonClassExp::semantic() %s\n", toChars());
+//printf("type: %s\n", type->toChars());
+#endif
+Expression *d = new DeclarationExp(loc, cd);
+d = d->semantic(sc);
+Expression *n = new NewExp(loc, thisexp, newargs, cd->type, arguments);
+Expression *c = new CommaExp(loc, d, n);
+return c->semantic(sc);
+}
+int NewAnonClassExp::checkSideEffect(int flag)
+{
+return 1;
+}
+void NewAnonClassExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{   int i;
+if (thisexp)
+{	expToCBuffer(buf, hgs, thisexp, PREC_primary);
+	buf->writeByte('.');
+}
+buf->writestring("new");
+if (newargs && newargs->dim)
+{
+	buf->writeByte('(');
+	argsToCBuffer(buf, newargs, hgs);
+	buf->writeByte(')');
+}
+buf->writestring(" class ");
+if (arguments && arguments->dim)
+{
+	buf->writeByte('(');
+	argsToCBuffer(buf, arguments, hgs);
+	buf->writeByte(')');
+}
+//buf->writestring(" { }");
+if (cd)
+{
+cd->toCBuffer(buf, hgs);
+}
+}
+/********************** SymOffExp **************************************/
+SymOffExp::SymOffExp(Loc loc, Declaration *var, unsigned offset)
+: Expression(loc, TOKsymoff, sizeof(SymOffExp))
+{
+assert(var);
+this->var = var;
+this->offset = offset;
+VarDeclaration *v = var->isVarDeclaration();
+if (v && v->needThis())
+	error("need 'this' for address of %s", v->toChars());
+}
+Expression *SymOffExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("SymOffExp::semantic('%s')\n", toChars());
+#endif
+//var->semantic(sc);
+if (!type)
+	type = var->type->pointerTo();
+VarDeclaration *v = var->isVarDeclaration();
+if (v)
+	v->checkNestedReference(sc, loc);
+return this;
+}
+int SymOffExp::isBool(int result)
+{
+return result ? TRUE : FALSE;
+}
+void SymOffExp::checkEscape()
+{
+VarDeclaration *v = var->isVarDeclaration();
+if (v)
+{
+	if (!v->isDataseg())
+	    error("escaping reference to local variable %s", v->toChars());
+}
+}
+void SymOffExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+if (offset)
+	buf->printf("(& %s+%u)", var->toChars(), offset);
+else
+	buf->printf("& %s", var->toChars());
+}
+/******************************** VarExp **************************/
+VarExp::VarExp(Loc loc, Declaration *var)
+	: Expression(loc, TOKvar, sizeof(VarExp))
+{
+//printf("VarExp(this = %p, '%s')\n", this, var->toChars());
+this->var = var;
+this->type = var->type;
+}
+int VarExp::equals(Object *o)
+{   VarExp *ne;
+if (this == o ||
+	(((Expression *)o)->op == TOKvar &&
+	 ((ne = (VarExp *)o), type->equals(ne->type)) &&
+	 var == ne->var))
+	return 1;
+return 0;
+}
+Expression *VarExp::semantic(Scope *sc)
+{   FuncLiteralDeclaration *fd;
+#if LOGSEMANTIC
+printf("VarExp::semantic(%s)\n", toChars());
+#endif
+if (!type)
+{	type = var->type;
+#if 0
+	if (var->storage_class & STClazy)
+	{
+	    TypeFunction *tf = new TypeFunction(NULL, type, 0, LINKd);
+	    type = new TypeDelegate(tf);
+	    type = type->semantic(loc, sc);
+	}
+#endif
+}
+VarDeclaration *v = var->isVarDeclaration();
+if (v)
+{
+	if (v->isConst() && type->toBasetype()->ty != Tsarray && v->init)
+	{
+	    ExpInitializer *ei = v->init->isExpInitializer();
+	    if (ei)
+	    {
+		//ei->exp->implicitCastTo(sc, type)->print();
+		return ei->exp->implicitCastTo(sc, type);
+	    }
+	}
+	v->checkNestedReference(sc, loc);
+}
+#if 0
+else if ((fd = var->isFuncLiteralDeclaration()) != NULL)
+{	Expression *e;
+	e = new FuncExp(loc, fd);
+	e->type = type;
+	return e;
+}
+#endif
+return this;
+}
+char *VarExp::toChars()
+{
+return var->toChars();
+}
+void VarExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(var->toChars());
+}
+void VarExp::checkEscape()
+{
+VarDeclaration *v = var->isVarDeclaration();
+if (v)
+{	Type *tb = v->type->toBasetype();
+	// if reference type
+	if (tb->ty == Tarray || tb->ty == Tsarray || tb->ty == Tclass)
+	{
+	    if ((v->isAuto() || v->isScope()) && !v->noauto)
+		error("escaping reference to auto local %s", v->toChars());
+	    else if (v->storage_class & STCvariadic)
+		error("escaping reference to variadic parameter %s", v->toChars());
+	}
+}
+}
+Expression *VarExp::toLvalue(Scope *sc, Expression *e)
+{
+#if 0
+tym = tybasic(e1->ET->Tty);
+if (!(tyscalar(tym) ||
+	  tym == TYstruct ||
+	  tym == TYarray && e->Eoper == TOKaddr))
+	    synerr(EM_lvalue);	// lvalue expected
+#endif
+if (var->storage_class & STClazy)
+	error("lazy variables cannot be lvalues");
+return this;
+}
+Expression *VarExp::modifiableLvalue(Scope *sc, Expression *e)
+{
+//printf("VarExp::modifiableLvalue('%s')\n", var->toChars());
+if (sc->incontract && var->isParameter())
+	error("cannot modify parameter '%s' in contract", var->toChars());
+if (type && type->toBasetype()->ty == Tsarray)
+	error("cannot change reference to static array '%s'", var->toChars());
+VarDeclaration *v = var->isVarDeclaration();
+if (v && v->canassign == 0 &&
+(var->isConst() || (global.params.Dversion > 1 && var->isFinal())))
+	error("cannot modify final variable '%s'", var->toChars());
+if (var->isCtorinit())
+{	// It's only modifiable if inside the right constructor
+	Dsymbol *s = sc->func;
+	while (1)
+	{
+	    FuncDeclaration *fd = NULL;
+	    if (s)
+		fd = s->isFuncDeclaration();
+	    if (fd &&
+		((fd->isCtorDeclaration() && var->storage_class & STCfield) ||
+		 (fd->isStaticCtorDeclaration() && !(var->storage_class & STCfield))) &&
+		fd->toParent() == var->toParent()
+	       )
+	    {
+		VarDeclaration *v = var->isVarDeclaration();
+		assert(v);
+		v->ctorinit = 1;
+		//printf("setting ctorinit\n");
+	    }
+	    else
+	    {
+		if (s)
+		{   s = s->toParent2();
+		    continue;
+		}
+		else
+		{
+		    const char *p = var->isStatic() ? "static " : "";
+		    error("can only initialize %sconst %s inside %sconstructor",
+			p, var->toChars(), p);
+		}
+	    }
+	    break;
+	}
+}
+// See if this expression is a modifiable lvalue (i.e. not const)
+return toLvalue(sc, e);
+}
+/******************************** TupleExp **************************/
+TupleExp::TupleExp(Loc loc, Expressions *exps)
+	: Expression(loc, TOKtuple, sizeof(TupleExp))
+{
+//printf("TupleExp(this = %p)\n", this);
+this->exps = exps;
+this->type = NULL;
+}
+TupleExp::TupleExp(Loc loc, TupleDeclaration *tup)
+	: Expression(loc, TOKtuple, sizeof(TupleExp))
+{
+exps = new Expressions();
+type = NULL;
+exps->reserve(tup->objects->dim);
+for (size_t i = 0; i < tup->objects->dim; i++)
+{   Object *o = (Object *)tup->objects->data[i];
+	if (o->dyncast() == DYNCAST_EXPRESSION)
+	{
+	    Expression *e = (Expression *)o;
+	    e = e->syntaxCopy();
+	    exps->push(e);
+	}
+	else if (o->dyncast() == DYNCAST_DSYMBOL)
+	{
+	    Dsymbol *s = (Dsymbol *)o;
+	    Expression *e = new DsymbolExp(loc, s);
+	    exps->push(e);
+	}
+	else if (o->dyncast() == DYNCAST_TYPE)
+	{
+	    Type *t = (Type *)o;
+	    Expression *e = new TypeExp(loc, t);
+	    exps->push(e);
+	}
+	else
+	{
+	    error("%s is not an expression", o->toChars());
+	}
+}
+}
+int TupleExp::equals(Object *o)
+{   TupleExp *ne;
+if (this == o)
+	return 1;
+if (((Expression *)o)->op == TOKtuple)
+{
+	TupleExp *te = (TupleExp *)o;
+	if (exps->dim != te->exps->dim)
+	    return 0;
+	for (size_t i = 0; i < exps->dim; i++)
+	{   Expression *e1 = (Expression *)exps->data[i];
+	    Expression *e2 = (Expression *)te->exps->data[i];
+	    if (!e1->equals(e2))
+		return 0;
+	}
+	return 1;
+}
+return 0;
+}
+Expression *TupleExp::syntaxCopy()
+{
+return new TupleExp(loc, arraySyntaxCopy(exps));
+}
+Expression *TupleExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("+TupleExp::semantic(%s)\n", toChars());
+#endif
+if (type)
+	return this;
+// Run semantic() on each argument
+for (size_t i = 0; i < exps->dim; i++)
+{	Expression *e = (Expression *)exps->data[i];
+	e = e->semantic(sc);
+	if (!e->type)
+	{   error("%s has no value", e->toChars());
+	    e->type = Type::terror;
+	}
+	exps->data[i] = (void *)e;
+}
+expandTuples(exps);
+if (0 && exps->dim == 1)
+{
+	return (Expression *)exps->data[0];
+}
+type = new TypeTuple(exps);
+//printf("-TupleExp::semantic(%s)\n", toChars());
+return this;
+}
+void TupleExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("tuple(");
+argsToCBuffer(buf, exps, hgs);
+buf->writeByte(')');
+}
+int TupleExp::checkSideEffect(int flag)
+{   int f = 0;
+for (int i = 0; i < exps->dim; i++)
+{	Expression *e = (Expression *)exps->data[i];
+	f |= e->checkSideEffect(2);
+}
+if (flag == 0 && f == 0)
+	Expression::checkSideEffect(0);
+return f;
+}
+void TupleExp::checkEscape()
+{
+for (size_t i = 0; i < exps->dim; i++)
+{   Expression *e = (Expression *)exps->data[i];
+	e->checkEscape();
+}
+}
+/******************************** FuncExp *********************************/
+FuncExp::FuncExp(Loc loc, FuncLiteralDeclaration *fd)
+	: Expression(loc, TOKfunction, sizeof(FuncExp))
+{
+this->fd = fd;
+}
+Expression *FuncExp::syntaxCopy()
+{
+return new FuncExp(loc, (FuncLiteralDeclaration *)fd->syntaxCopy(NULL));
+}
+Expression *FuncExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("FuncExp::semantic(%s)\n", toChars());
+#endif
+if (!type)
+{
+	fd->semantic(sc);
+	fd->parent = sc->parent;
+	if (global.errors)
+	{
+	    if (!fd->type->next)
+		fd->type->next = Type::terror;
+	}
+	else
+	{
+	    fd->semantic2(sc);
+	    if (!global.errors)
+	    {
+		fd->semantic3(sc);
+		if (!global.errors && global.params.useInline)
+		    fd->inlineScan();
+	    }
+	}
+	// Type is a "delegate to" or "pointer to" the function literal
+	if (fd->isNested())
+	{
+	    type = new TypeDelegate(fd->type);
+	    type = type->semantic(loc, sc);
+	}
+	else
+	{
+	    type = fd->type->pointerTo();
+	}
+}
+return this;
+}
+char *FuncExp::toChars()
+{
+return fd->toChars();
+}
+void FuncExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(fd->toChars());
+}
+/******************************** DeclarationExp **************************/
+DeclarationExp::DeclarationExp(Loc loc, Dsymbol *declaration)
+	: Expression(loc, TOKdeclaration, sizeof(DeclarationExp))
+{
+this->declaration = declaration;
+}
+Expression *DeclarationExp::syntaxCopy()
+{
+return new DeclarationExp(loc, declaration->syntaxCopy(NULL));
+}
+Expression *DeclarationExp::semantic(Scope *sc)
+{
+if (type)
+	return this;
+#if LOGSEMANTIC
+printf("DeclarationExp::semantic() %s\n", toChars());
+#endif
+/* This is here to support extern(linkage) declaration,
+* where the extern(linkage) winds up being an AttribDeclaration
+* wrapper.
+*/
+Dsymbol *s = declaration;
+AttribDeclaration *ad = declaration->isAttribDeclaration();
+if (ad)
+{
+	if (ad->decl && ad->decl->dim == 1)
+	    s = (Dsymbol *)ad->decl->data[0];
+}
+if (s->isVarDeclaration())
+{	// Do semantic() on initializer first, so:
+	//	int a = a;
+	// will be illegal.
+	declaration->semantic(sc);
+	s->parent = sc->parent;
+}
+//printf("inserting '%s' %p into sc = %p\n", s->toChars(), s, sc);
+// Insert into both local scope and function scope.
+// Must be unique in both.
+if (s->ident)
+{
+	if (!sc->insert(s))
+	    error("declaration %s is already defined", s->toPrettyChars());
+	else if (sc->func)
+	{   VarDeclaration *v = s->isVarDeclaration();
+	    if ((s->isFuncDeclaration() /*|| v && v->storage_class & STCstatic*/) &&
+		!sc->func->localsymtab->insert(s))
+		error("declaration %s is already defined in another scope in %s", s->toPrettyChars(), sc->func->toChars());
+	    else if (!global.params.useDeprecated)
+	    {	// Disallow shadowing
+		for (Scope *scx = sc->enclosing; scx && scx->func == sc->func; scx = scx->enclosing)
+		{   Dsymbol *s2;
+		    if (scx->scopesym && scx->scopesym->symtab &&
+			(s2 = scx->scopesym->symtab->lookup(s->ident)) != NULL &&
+			s != s2)
+		    {
+			error("shadowing declaration %s is deprecated", s->toPrettyChars());
+		    }
+		}
+	    }
+	}
+}
+if (!s->isVarDeclaration())
+{
+	declaration->semantic(sc);
+	s->parent = sc->parent;
+}
+if (!global.errors)
+{
+	declaration->semantic2(sc);
+	if (!global.errors)
+	{
+	    declaration->semantic3(sc);
+	    if (!global.errors && global.params.useInline)
+		declaration->inlineScan();
+	}
+}
+type = Type::tvoid;
+return this;
+}
+int DeclarationExp::checkSideEffect(int flag)
+{
+return 1;
+}
+void DeclarationExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+declaration->toCBuffer(buf, hgs);
+}
+/************************ TypeidExp ************************************/
+/*
+*	typeid(int)
+*/
+TypeidExp::TypeidExp(Loc loc, Type *typeidType)
+: Expression(loc, TOKtypeid, sizeof(TypeidExp))
+{
+this->typeidType = typeidType;
+}
+Expression *TypeidExp::syntaxCopy()
+{
+return new TypeidExp(loc, typeidType->syntaxCopy());
+}
+Expression *TypeidExp::semantic(Scope *sc)
+{   Expression *e;
+#if LOGSEMANTIC
+printf("TypeidExp::semantic()\n");
+#endif
+typeidType = typeidType->semantic(loc, sc);
+e = typeidType->getTypeInfo(sc);
+return e;
+}
+void TypeidExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("typeid(");
+typeidType->toCBuffer(buf, NULL, hgs);
+buf->writeByte(')');
+}
+/************************************************************/
+HaltExp::HaltExp(Loc loc)
+	: Expression(loc, TOKhalt, sizeof(HaltExp))
+{
+}
+Expression *HaltExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("HaltExp::semantic()\n");
+#endif
+type = Type::tvoid;
+return this;
+}
+int HaltExp::checkSideEffect(int flag)
+{
+return 1;
+}
+void HaltExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("halt");
+}
+/************************************************************/
+IftypeExp::IftypeExp(Loc loc, Type *targ, Identifier *id, enum TOK tok,
+	Type *tspec, enum TOK tok2)
+	: Expression(loc, TOKis, sizeof(IftypeExp))
+{
+this->targ = targ;
+this->id = id;
+this->tok = tok;
+this->tspec = tspec;
+this->tok2 = tok2;
+}
+Expression *IftypeExp::syntaxCopy()
+{
+return new IftypeExp(loc,
+	targ->syntaxCopy(),
+	id,
+	tok,
+	tspec ? tspec->syntaxCopy() : NULL,
+	tok2);
+}
+Expression *IftypeExp::semantic(Scope *sc)
+{   Type *tded;
+//printf("IftypeExp::semantic()\n");
+if (id && !(sc->flags & SCOPEstaticif))
+	error("can only declare type aliases within static if conditionals");
+unsigned errors_save = global.errors;
+global.errors = 0;
+global.gag++;			// suppress printing of error messages
+targ = targ->semantic(loc, sc);
+global.gag--;
+unsigned gerrors = global.errors;
+global.errors = errors_save;
+if (gerrors)			// if any errors happened
+{					// then condition is false
+	goto Lno;
+}
+else if (tok2 != TOKreserved)
+{
+	switch (tok2)
+	{
+	    case TOKtypedef:
+		if (targ->ty != Ttypedef)
+		    goto Lno;
+		tded = ((TypeTypedef *)targ)->sym->basetype;
+		break;
+	    case TOKstruct:
+		if (targ->ty != Tstruct)
+		    goto Lno;
+		if (((TypeStruct *)targ)->sym->isUnionDeclaration())
+		    goto Lno;
+		tded = targ;
+		break;
+	    case TOKunion:
+		if (targ->ty != Tstruct)
+		    goto Lno;
+		if (!((TypeStruct *)targ)->sym->isUnionDeclaration())
+		    goto Lno;
+		tded = targ;
+		break;
+	    case TOKclass:
+		if (targ->ty != Tclass)
+		    goto Lno;
+		if (((TypeClass *)targ)->sym->isInterfaceDeclaration())
+		    goto Lno;
+		tded = targ;
+		break;
+	    case TOKinterface:
+		if (targ->ty != Tclass)
+		    goto Lno;
+		if (!((TypeClass *)targ)->sym->isInterfaceDeclaration())
+		    goto Lno;
+		tded = targ;
+		break;
+	    case TOKsuper:
+		// If class or interface, get the base class and interfaces
+		if (targ->ty != Tclass)
+		    goto Lno;
+		else
+		{   ClassDeclaration *cd = ((TypeClass *)targ)->sym;
+		    Arguments *args = new Arguments;
+		    args->reserve(cd->baseclasses.dim);
+		    for (size_t i = 0; i < cd->baseclasses.dim; i++)
+		    {	BaseClass *b = (BaseClass *)cd->baseclasses.data[i];
+			args->push(new Argument(STCin, b->type, NULL, NULL));
+		    }
+		    tded = new TypeTuple(args);
+		}
+		break;
+	    case TOKenum:
+		if (targ->ty != Tenum)
+		    goto Lno;
+		tded = ((TypeEnum *)targ)->sym->memtype;
+		break;
+	    case TOKdelegate:
+		if (targ->ty != Tdelegate)
+		    goto Lno;
+		tded = targ->next;	// the underlying function type
+		break;
+	    case TOKfunction:
+	    {	if (targ->ty != Tfunction)
+		    goto Lno;
+		tded = targ;
+		/* Generate tuple from function parameter types.
+		 */
+		assert(tded->ty == Tfunction);
+		Arguments *params = ((TypeFunction *)tded)->parameters;
+		size_t dim = Argument::dim(params);
+		Arguments *args = new Arguments;
+		args->reserve(dim);
+		for (size_t i = 0; i < dim; i++)
+		{   Argument *arg = Argument::getNth(params, i);
+		    assert(arg && arg->type);
+		    args->push(new Argument(arg->storageClass, arg->type, NULL, NULL));
+		}
+		tded = new TypeTuple(args);
+		break;
+	    }
+	    case TOKreturn:
+		/* Get the 'return type' for the function,
+		 * delegate, or pointer to function.
+		 */
+		if (targ->ty == Tfunction)
+		    tded = targ->next;
+		else if (targ->ty == Tdelegate)
+		    tded = targ->next->next;
+		else if (targ->ty == Tpointer && targ->next->ty == Tfunction)
+		    tded = targ->next->next;
+		else
+		    goto Lno;
+		break;
+	    default:
+		assert(0);
+	}
+	goto Lyes;
+}
+else if (id && tspec)
+{
+	/* Evaluate to TRUE if targ matches tspec.
+	 * If TRUE, declare id as an alias for the specialized type.
+	 */
+	MATCH m;
+	TemplateTypeParameter tp(loc, id, NULL, NULL);
+	TemplateParameters parameters;
+	parameters.setDim(1);
+	parameters.data[0] = (void *)&tp;
+	Objects dedtypes;
+	dedtypes.setDim(1);
+	dedtypes.data[0] = NULL;
+	m = targ->deduceType(NULL, tspec, &parameters, &dedtypes);
+	if (m == MATCHnomatch ||
+	    (m != MATCHexact && tok == TOKequal))
+	    goto Lno;
+	else
+	{
+	    assert(dedtypes.dim == 1);
+	    tded = (Type *)dedtypes.data[0];
+	    if (!tded)
+		tded = targ;
+	    goto Lyes;
+	}
+}
+else if (id)
+{
+	/* Declare id as an alias for type targ. Evaluate to TRUE
+	 */
+	tded = targ;
+	goto Lyes;
+}
+else if (tspec)
+{
+	/* Evaluate to TRUE if targ matches tspec
+	 */
+	tspec = tspec->semantic(loc, sc);
+	//printf("targ  = %s\n", targ->toChars());
+	//printf("tspec = %s\n", tspec->toChars());
+	if (tok == TOKcolon)
+	{   if (targ->implicitConvTo(tspec))
+		goto Lyes;
+	    else
+		goto Lno;
+	}
+	else /* == */
+	{   if (targ->equals(tspec))
+		goto Lyes;
+	    else
+		goto Lno;
+	}
+}
+Lyes:
+if (id)
+{
+	Dsymbol *s = new AliasDeclaration(loc, id, tded);
+	s->semantic(sc);
+	sc->insert(s);
+	if (sc->sd)
+	    s->addMember(sc, sc->sd, 1);
+}
+return new IntegerExp(1);
+Lno:
+return new IntegerExp(0);
+}
+void IftypeExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("is(");
+targ->toCBuffer(buf, id, hgs);
+if (tspec)
+{
+	if (tok == TOKcolon)
+	    buf->writestring(" : ");
+	else
+	    buf->writestring(" == ");
+	tspec->toCBuffer(buf, NULL, hgs);
+}
+buf->writeByte(')');
+}
+/************************************************************/
+UnaExp::UnaExp(Loc loc, enum TOK op, int size, Expression *e1)
+	: Expression(loc, op, size)
+{
+this->e1 = e1;
+}
+Expression *UnaExp::syntaxCopy()
+{   UnaExp *e;
+e = (UnaExp *)copy();
+e->type = NULL;
+e->e1 = e->e1->syntaxCopy();
+return e;
+}
+Expression *UnaExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("UnaExp::semantic('%s')\n", toChars());
+#endif
+e1 = e1->semantic(sc);
+//    if (!e1->type)
+//	error("%s has no value", e1->toChars());
+return this;
+}
+void UnaExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(Token::toChars(op));
+expToCBuffer(buf, hgs, e1, precedence[op]);
+}
+/************************************************************/
+BinExp::BinExp(Loc loc, enum TOK op, int size, Expression *e1, Expression *e2)
+	: Expression(loc, op, size)
+{
+this->e1 = e1;
+this->e2 = e2;
+}
+Expression *BinExp::syntaxCopy()
+{   BinExp *e;
+e = (BinExp *)copy();
+e->type = NULL;
+e->e1 = e->e1->syntaxCopy();
+e->e2 = e->e2->syntaxCopy();
+return e;
+}
+Expression *BinExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("BinExp::semantic('%s')\n", toChars());
+#endif
+e1 = e1->semantic(sc);
+if (!e1->type)
+{
+	error("%s has no value", e1->toChars());
+	e1->type = Type::terror;
+}
+e2 = e2->semantic(sc);
+if (!e2->type)
+{
+	error("%s has no value", e2->toChars());
+	e2->type = Type::terror;
+}
+assert(e1->type);
+return this;
+}
+Expression *BinExp::semanticp(Scope *sc)
+{
+BinExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+e2 = resolveProperties(sc, e2);
+return this;
+}
+/***************************
+* Common semantic routine for some xxxAssignExp's.
+*/
+Expression *BinExp::commonSemanticAssign(Scope *sc)
+{   Expression *e;
+if (!type)
+{
+	BinExp::semantic(sc);
+	e2 = resolveProperties(sc, e2);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	e1 = e1->modifiableLvalue(sc, NULL);
+	e1->checkScalar();
+	type = e1->type;
+	if (type->toBasetype()->ty == Tbool)
+	{
+	    error("operator not allowed on bool expression %s", toChars());
+	}
+	typeCombine(sc);
+	e1->checkArithmetic();
+	e2->checkArithmetic();
+	if (op == TOKmodass && e2->type->iscomplex())
+	{   error("cannot perform modulo complex arithmetic");
+	    return new IntegerExp(0);
+	}
+}
+return this;
+}
+Expression *BinExp::commonSemanticAssignIntegral(Scope *sc)
+{   Expression *e;
+if (!type)
+{
+	BinExp::semantic(sc);
+	e2 = resolveProperties(sc, e2);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	e1 = e1->modifiableLvalue(sc, NULL);
+	e1->checkScalar();
+	type = e1->type;
+	if (type->toBasetype()->ty == Tbool)
+	{
+	    e2 = e2->implicitCastTo(sc, type);
+	}
+	typeCombine(sc);
+	e1->checkIntegral();
+	e2->checkIntegral();
+}
+return this;
+}
+int BinExp::checkSideEffect(int flag)
+{
+if (op == TOKplusplus ||
+	   op == TOKminusminus ||
+	   op == TOKassign ||
+	   op == TOKaddass ||
+	   op == TOKminass ||
+	   op == TOKcatass ||
+	   op == TOKmulass ||
+	   op == TOKdivass ||
+	   op == TOKmodass ||
+	   op == TOKshlass ||
+	   op == TOKshrass ||
+	   op == TOKushrass ||
+	   op == TOKandass ||
+	   op == TOKorass ||
+	   op == TOKxorass ||
+	   op == TOKin ||
+	   op == TOKremove)
+	return 1;
+return Expression::checkSideEffect(flag);
+}
+void BinExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, e1, precedence[op]);
+buf->writeByte(' ');
+buf->writestring(Token::toChars(op));
+buf->writeByte(' ');
+expToCBuffer(buf, hgs, e2, (enum PREC)(precedence[op] + 1));
+}
+int BinExp::isunsigned()
+{
+return e1->type->isunsigned() || e2->type->isunsigned();
+}
+void BinExp::incompatibleTypes()
+{
+error("incompatible types for ((%s) %s (%s)): '%s' and '%s'",
+e1->toChars(), Token::toChars(op), e2->toChars(),
+e1->type->toChars(), e2->type->toChars());
+}
+/************************************************************/
+CompileExp::CompileExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKmixin, sizeof(CompileExp), e)
+{
+}
+Expression *CompileExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("CompileExp::semantic('%s')\n", toChars());
+#endif
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+e1 = e1->optimize(WANTvalue | WANTinterpret);
+if (e1->op != TOKstring)
+{	error("argument to mixin must be a string, not (%s)", e1->toChars());
+	type = Type::terror;
+	return this;
+}
+StringExp *se = (StringExp *)e1;
+se = se->toUTF8(sc);
+Parser p(sc->module, (unsigned char *)se->string, se->len, 0);
+p.loc = loc;
+p.nextToken();
+Expression *e = p.parseExpression();
+if (p.token.value != TOKeof)
+	error("incomplete mixin expression (%s)", se->toChars());
+return e->semantic(sc);
+}
+void CompileExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("mixin(");
+expToCBuffer(buf, hgs, e1, PREC_assign);
+buf->writeByte(')');
+}
+/************************************************************/
+FileExp::FileExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKmixin, sizeof(FileExp), e)
+{
+}
+Expression *FileExp::semantic(Scope *sc)
+{   char *name;
+StringExp *se;
+#if LOGSEMANTIC
+printf("FileExp::semantic('%s')\n", toChars());
+#endif
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+e1 = e1->optimize(WANTvalue);
+if (e1->op != TOKstring)
+{	error("file name argument must be a string, not (%s)", e1->toChars());
+	goto Lerror;
+}
+se = (StringExp *)e1;
+se = se->toUTF8(sc);
+name = (char *)se->string;
+if (!global.params.fileImppath)
+{	error("need -Jpath switch to import text file %s", name);
+	goto Lerror;
+}
+if (name != FileName::name(name))
+{	error("use -Jpath switch to provide path for filename %s", name);
+	goto Lerror;
+}
+name = FileName::searchPath(global.filePath, name, 0);
+if (!name)
+{	error("file %s cannot be found, check -Jpath", se->toChars());
+	goto Lerror;
+}
+if (global.params.verbose)
+	printf("file      %s\t(%s)\n", se->string, name);
+{	File f(name);
+	if (f.read())
+	{   error("cannot read file %s", f.toChars());
+	    goto Lerror;
+	}
+	else
+	{
+	    f.ref = 1;
+	    se = new StringExp(loc, f.buffer, f.len);
+	}
+}
+Lret:
+return se->semantic(sc);
+Lerror:
+se = new StringExp(loc, "");
+goto Lret;
+}
+void FileExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("import(");
+expToCBuffer(buf, hgs, e1, PREC_assign);
+buf->writeByte(')');
+}
+/************************************************************/
+AssertExp::AssertExp(Loc loc, Expression *e, Expression *msg)
+	: UnaExp(loc, TOKassert, sizeof(AssertExp), e)
+{
+this->msg = msg;
+}
+Expression *AssertExp::syntaxCopy()
+{
+AssertExp *ae = new AssertExp(loc, e1->syntaxCopy(),
+				       msg ? msg->syntaxCopy() : NULL);
+return ae;
+}
+Expression *AssertExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("AssertExp::semantic('%s')\n", toChars());
+#endif
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+// BUG: see if we can do compile time elimination of the Assert
+e1 = e1->optimize(WANTvalue);
+e1 = e1->checkToBoolean();
+if (msg)
+{
+	msg = msg->semantic(sc);
+	msg = resolveProperties(sc, msg);
+	msg = msg->implicitCastTo(sc, Type::tchar->arrayOf());
+	msg = msg->optimize(WANTvalue);
+}
+if (e1->isBool(FALSE))
+{
+	FuncDeclaration *fd = sc->parent->isFuncDeclaration();
+	fd->hasReturnExp |= 4;
+	if (!global.params.useAssert)
+	{   Expression *e = new HaltExp(loc);
+	    e = e->semantic(sc);
+	    return e;
+	}
+}
+type = Type::tvoid;
+return this;
+}
+int AssertExp::checkSideEffect(int flag)
+{
+return 1;
+}
+void AssertExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("assert(");
+expToCBuffer(buf, hgs, e1, PREC_assign);
+if (msg)
+{
+	buf->writeByte(',');
+	expToCBuffer(buf, hgs, msg, PREC_assign);
+}
+buf->writeByte(')');
+}
+/************************************************************/
+DotIdExp::DotIdExp(Loc loc, Expression *e, Identifier *ident)
+	: UnaExp(loc, TOKdot, sizeof(DotIdExp), e)
+{
+this->ident = ident;
+}
+Expression *DotIdExp::semantic(Scope *sc)
+{   Expression *e;
+Expression *eleft;
+Expression *eright;
+#if LOGSEMANTIC
+printf("DotIdExp::semantic(this = %p, '%s')\n", this, toChars());
+//printf("e1->op = %d, '%s'\n", e1->op, Token::toChars(e1->op));
+#endif
+//{ static int z; fflush(stdout); if (++z == 10) *(char*)0=0; }
+#if 0
+/* Don't do semantic analysis if we'll be converting
+* it to a string.
+*/
+if (ident == Id::stringof)
+{	char *s = e1->toChars();
+	e = new StringExp(loc, s, strlen(s), 'c');
+	e = e->semantic(sc);
+	return e;
+}
+#endif
+/* Special case: rewrite this.id and super.id
+* to be classtype.id and baseclasstype.id
+* if we have no this pointer.
+*/
+if ((e1->op == TOKthis || e1->op == TOKsuper) && !hasThis(sc))
+{	ClassDeclaration *cd;
+	StructDeclaration *sd;
+	AggregateDeclaration *ad;
+	ad = sc->getStructClassScope();
+	if (ad)
+	{
+	    cd = ad->isClassDeclaration();
+	    if (cd)
+	    {
+		if (e1->op == TOKthis)
+		{
+		    e = new TypeDotIdExp(loc, cd->type, ident);
+		    return e->semantic(sc);
+		}
+		else if (cd->baseClass && e1->op == TOKsuper)
+		{
+		    e = new TypeDotIdExp(loc, cd->baseClass->type, ident);
+		    return e->semantic(sc);
+		}
+	    }
+	    else
+	    {
+		sd = ad->isStructDeclaration();
+		if (sd)
+		{
+		    if (e1->op == TOKthis)
+		    {
+			e = new TypeDotIdExp(loc, sd->type, ident);
+			return e->semantic(sc);
+		    }
+		}
+	    }
+	}
+}
+UnaExp::semantic(sc);
+if (e1->op == TOKdotexp)
+{
+	DotExp *de = (DotExp *)e1;
+	eleft = de->e1;
+	eright = de->e2;
+}
+else
+{
+	e1 = resolveProperties(sc, e1);
+	eleft = NULL;
+	eright = e1;
+}
+if (e1->op == TOKtuple && ident == Id::length)
+{
+	TupleExp *te = (TupleExp *)e1;
+	e = new IntegerExp(loc, te->exps->dim, Type::tsize_t);
+	return e;
+}
+if (eright->op == TOKimport)	// also used for template alias's
+{
+	Dsymbol *s;
+	ScopeExp *ie = (ScopeExp *)eright;
+	s = ie->sds->search(loc, ident, 0);
+	if (s)
+	{
+	    s = s->toAlias();
+	    checkDeprecated(sc, s);
+	    EnumMember *em = s->isEnumMember();
+	    if (em)
+	    {
+		e = em->value;
+		e = e->semantic(sc);
+		return e;
+	    }
+	    VarDeclaration *v = s->isVarDeclaration();
+	    if (v)
+	    {
+		//printf("DotIdExp:: Identifier '%s' is a variable, type '%s'\n", toChars(), v->type->toChars());
+		if (v->inuse)
+		{
+		    error("circular reference to '%s'", v->toChars());
+		    type = Type::tint32;
+		    return this;
+		}
+		type = v->type;
+		if (v->isConst())
+		{
+		    if (v->init)
+		    {
+			ExpInitializer *ei = v->init->isExpInitializer();
+			if (ei)
+			{
+//printf("\tei: %p (%s)\n", ei->exp, ei->exp->toChars());
+//ei->exp = ei->exp->semantic(sc);
+			    if (ei->exp->type == type)
+			    {
+				e = ei->exp->copy();	// make copy so we can change loc
+				e->loc = loc;
+				return e;
+			    }
+			}
+		    }
+		    else if (type->isscalar())
+		    {
+			e = type->defaultInit();
+			e->loc = loc;
+			return e;
+		    }
+		}
+		if (v->needThis())
+		{
+		    if (!eleft)
+			eleft = new ThisExp(loc);
+		    e = new DotVarExp(loc, eleft, v);
+		    e = e->semantic(sc);
+		}
+		else
+		{
+		    e = new VarExp(loc, v);
+		    if (eleft)
+		    {	e = new CommaExp(loc, eleft, e);
+			e->type = v->type;
+		    }
+		}
+		return e->deref();
+	    }
+	    FuncDeclaration *f = s->isFuncDeclaration();
+	    if (f)
+	    {
+		//printf("it's a function\n");
+		if (f->needThis())
+		{
+		    if (!eleft)
+			eleft = new ThisExp(loc);
+		    e = new DotVarExp(loc, eleft, f);
+		    e = e->semantic(sc);
+		}
+		else
+		{
+		    e = new VarExp(loc, f);
+		    if (eleft)
+		    {	e = new CommaExp(loc, eleft, e);
+			e->type = f->type;
+		    }
+		}
+		return e;
+	    }
+	    Type *t = s->getType();
+	    if (t)
+	    {
+		return new TypeExp(loc, t);
+	    }
+	    ScopeDsymbol *sds = s->isScopeDsymbol();
+	    if (sds)
+	    {
+		//printf("it's a ScopeDsymbol\n");
+		e = new ScopeExp(loc, sds);
+		e = e->semantic(sc);
+		if (eleft)
+		    e = new DotExp(loc, eleft, e);
+		return e;
+	    }
+	    Import *imp = s->isImport();
+	    if (imp)
+	    {
+		ScopeExp *ie;
+		ie = new ScopeExp(loc, imp->pkg);
+		return ie->semantic(sc);
+	    }
+	    // BUG: handle other cases like in IdentifierExp::semantic()
+#ifdef DEBUG
+	    printf("s = '%s', kind = '%s'\n", s->toChars(), s->kind());
+#endif
+	    assert(0);
+	}
+	else if (ident == Id::stringof)
+	{   char *s = ie->toChars();
+	    e = new StringExp(loc, s, strlen(s), 'c');
+	    e = e->semantic(sc);
+	    return e;
+	}
+	error("undefined identifier %s", toChars());
+	type = Type::tvoid;
+	return this;
+}
+else if (e1->type->ty == Tpointer &&
+	     ident != Id::init && ident != Id::__sizeof &&
+	     ident != Id::alignof && ident != Id::offsetof &&
+	     ident != Id::mangleof && ident != Id::stringof)
+{
+	e = new PtrExp(loc, e1);
+	e->type = e1->type->next;
+	return e->type->dotExp(sc, e, ident);
+}
+else
+{
+	e = e1->type->dotExp(sc, e1, ident);
+	e = e->semantic(sc);
+	return e;
+}
+}
+void DotIdExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+//printf("DotIdExp::toCBuffer()\n");
+expToCBuffer(buf, hgs, e1, PREC_primary);
+buf->writeByte('.');
+buf->writestring(ident->toChars());
+}
+/********************** DotTemplateExp ***********************************/
+// Mainly just a placeholder
+DotTemplateExp::DotTemplateExp(Loc loc, Expression *e, TemplateDeclaration *td)
+	: UnaExp(loc, TOKdottd, sizeof(DotTemplateExp), e)
+{
+this->td = td;
+}
+void DotTemplateExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, e1, PREC_primary);
+buf->writeByte('.');
+buf->writestring(td->toChars());
+}
+/************************************************************/
+DotVarExp::DotVarExp(Loc loc, Expression *e, Declaration *v)
+	: UnaExp(loc, TOKdotvar, sizeof(DotVarExp), e)
+{
+//printf("DotVarExp()\n");
+this->var = v;
+}
+Expression *DotVarExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("DotVarExp::semantic('%s')\n", toChars());
+#endif
+if (!type)
+{
+	var = var->toAlias()->isDeclaration();
+	TupleDeclaration *tup = var->isTupleDeclaration();
+	if (tup)
+	{   /* Replace:
+	     *	e1.tuple(a, b, c)
+	     * with:
+	     *	tuple(e1.a, e1.b, e1.c)
+	     */
+	    Expressions *exps = new Expressions;
+	    exps->reserve(tup->objects->dim);
+	    for (size_t i = 0; i < tup->objects->dim; i++)
+	    {   Object *o = (Object *)tup->objects->data[i];
+		if (o->dyncast() != DYNCAST_EXPRESSION)
+		{
+		    error("%s is not an expression", o->toChars());
+		}
+		else
+		{
+		    Expression *e = (Expression *)o;
+		    if (e->op != TOKdsymbol)
+			error("%s is not a member", e->toChars());
+		    else
+		    {	DsymbolExp *ve = (DsymbolExp *)e;
+			e = new DotVarExp(loc, e1, ve->s->isDeclaration());
+			exps->push(e);
+		    }
+		}
+	    }
+	    Expression *e = new TupleExp(loc, exps);
+	    e = e->semantic(sc);
+	    return e;
+	}
+	e1 = e1->semantic(sc);
+	type = var->type;
+	if (!type && global.errors)
+	{   // var is goofed up, just return 0
+	    return new IntegerExp(0);
+	}
+	assert(type);
+	if (!var->isFuncDeclaration())	// for functions, do checks after overload resolution
+	{
+	    AggregateDeclaration *ad = var->toParent()->isAggregateDeclaration();
+	L1:
+	    Type *t = e1->type;
+	    if (ad &&
+		!(t->ty == Tpointer && t->next->ty == Tstruct &&
+		  ((TypeStruct *)t->next)->sym == ad)
+		&&
+		!(t->ty == Tstruct &&
+		  ((TypeStruct *)t)->sym == ad)
+	       )
+	    {
+		ClassDeclaration *cd = ad->isClassDeclaration();
+		ClassDeclaration *tcd = t->isClassHandle();
+		if (!cd || !tcd ||
+		    !(tcd == cd || cd->isBaseOf(tcd, NULL))
+		   )
+		{
+		    if (tcd && tcd->isNested())
+		    {	// Try again with outer scope
+			e1 = new DotVarExp(loc, e1, tcd->vthis);
+			e1 = e1->semantic(sc);
+			// Skip over nested functions, and get the enclosing
+			// class type.
+			Dsymbol *s = tcd->toParent();
+			while (s && s->isFuncDeclaration())
+			{   FuncDeclaration *f = s->isFuncDeclaration();
+			    if (f->vthis)
+			    {
+				e1 = new VarExp(loc, f->vthis);
+			    }
+			    s = s->toParent();
+			}
+			if (s && s->isClassDeclaration())
+			    e1->type = s->isClassDeclaration()->type;
+			goto L1;
+		    }
+#ifdef DEBUG
+		    printf("2: ");
+#endif
+		    error("this for %s needs to be type %s not type %s",
+			var->toChars(), ad->toChars(), t->toChars());
+		}
+	    }
+	    accessCheck(loc, sc, e1, var);
+	}
+}
+//printf("-DotVarExp::semantic('%s')\n", toChars());
+return this;
+}
+Expression *DotVarExp::toLvalue(Scope *sc, Expression *e)
+{
+//printf("DotVarExp::toLvalue(%s)\n", toChars());
+return this;
+}
+Expression *DotVarExp::modifiableLvalue(Scope *sc, Expression *e)
+{
+//printf("DotVarExp::modifiableLvalue(%s)\n", toChars());
+if (var->isCtorinit())
+{	// It's only modifiable if inside the right constructor
+	Dsymbol *s = sc->func;
+	while (1)
+	{
+	    FuncDeclaration *fd = NULL;
+	    if (s)
+		fd = s->isFuncDeclaration();
+	    if (fd &&
+		((fd->isCtorDeclaration() && var->storage_class & STCfield) ||
+		 (fd->isStaticCtorDeclaration() && !(var->storage_class & STCfield))) &&
+		fd->toParent() == var->toParent() &&
+		e1->op == TOKthis
+	       )
+	    {
+		VarDeclaration *v = var->isVarDeclaration();
+		assert(v);
+		v->ctorinit = 1;
+		//printf("setting ctorinit\n");
+	    }
+	    else
+	    {
+		if (s)
+		{   s = s->toParent2();
+		    continue;
+		}
+		else
+		{
+		    const char *p = var->isStatic() ? "static " : "";
+		    error("can only initialize %sconst member %s inside %sconstructor",
+			p, var->toChars(), p);
+		}
+	    }
+	    break;
+	}
+}
+return this;
+}
+void DotVarExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, e1, PREC_primary);
+buf->writeByte('.');
+buf->writestring(var->toChars());
+}
+/************************************************************/
+/* Things like:
+*	foo.bar!(args)
+*/
+DotTemplateInstanceExp::DotTemplateInstanceExp(Loc loc, Expression *e, TemplateInstance *ti)
+	: UnaExp(loc, TOKdotti, sizeof(DotTemplateInstanceExp), e)
+{
+//printf("DotTemplateInstanceExp()\n");
+this->ti = ti;
+}
+Expression *DotTemplateInstanceExp::syntaxCopy()
+{
+DotTemplateInstanceExp *de = new DotTemplateInstanceExp(loc,
+	e1->syntaxCopy(),
+	(TemplateInstance *)ti->syntaxCopy(NULL));
+return de;
+}
+Expression *DotTemplateInstanceExp::semantic(Scope *sc)
+{   Dsymbol *s;
+Dsymbol *s2;
+TemplateDeclaration *td;
+Expression *e;
+Identifier *id;
+Type *t1;
+Expression *eleft = NULL;
+Expression *eright;
+#if LOGSEMANTIC
+printf("DotTemplateInstanceExp::semantic('%s')\n", toChars());
+#endif
+//e1->print();
+//print();
+e1 = e1->semantic(sc);
+t1 = e1->type;
+if (t1)
+	t1 = t1->toBasetype();
+//t1->print();
+if (e1->op == TOKdotexp)
+{	DotExp *de = (DotExp *)e1;
+	eleft = de->e1;
+	eright = de->e2;
+}
+else
+{	eleft = NULL;
+	eright = e1;
+}
+if (eright->op == TOKimport)
+{
+	s = ((ScopeExp *)eright)->sds;
+}
+else if (e1->op == TOKtype)
+{
+	s = t1->isClassHandle();
+	if (!s)
+	{   if (t1->ty == Tstruct)
+		s = ((TypeStruct *)t1)->sym;
+	    else
+		goto L1;
+	}
+}
+else if (t1 && (t1->ty == Tstruct || t1->ty == Tclass))
+{
+	s = t1->toDsymbol(sc);
+	eleft = e1;
+}
+else if (t1 && t1->ty == Tpointer)
+{
+	t1 = t1->next->toBasetype();
+	if (t1->ty != Tstruct)
+	    goto L1;
+	s = t1->toDsymbol(sc);
+	eleft = e1;
+}
+else
+{
+L1:
+	error("template %s is not a member of %s", ti->toChars(), e1->toChars());
+	goto Lerr;
+}
+assert(s);
+id = ti->name;
+s2 = s->search(loc, id, 0);
+if (!s2)
+{	error("template identifier %s is not a member of %s %s", id->toChars(), s->kind(), s->ident->toChars());
+	goto Lerr;
+}
+s = s2;
+s->semantic(sc);
+s = s->toAlias();
+td = s->isTemplateDeclaration();
+if (!td)
+{
+	error("%s is not a template", id->toChars());
+	goto Lerr;
+}
+if (global.errors)
+	goto Lerr;
+ti->tempdecl = td;
+if (eleft)
+{	Declaration *v;
+	ti->semantic(sc);
+	s = ti->inst->toAlias();
+	v = s->isDeclaration();
+	if (v)
+	{   e = new DotVarExp(loc, eleft, v);
+	    e = e->semantic(sc);
+	    return e;
+	}
+}
+e = new ScopeExp(loc, ti);
+if (eleft)
+{
+	e = new DotExp(loc, eleft, e);
+}
+e = e->semantic(sc);
+return e;
+Lerr:
+return new IntegerExp(0);
+}
+void DotTemplateInstanceExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, e1, PREC_primary);
+buf->writeByte('.');
+ti->toCBuffer(buf, hgs);
+}
+/************************************************************/
+DelegateExp::DelegateExp(Loc loc, Expression *e, FuncDeclaration *f)
+	: UnaExp(loc, TOKdelegate, sizeof(DelegateExp), e)
+{
+this->func = f;
+}
+Expression *DelegateExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("DelegateExp::semantic('%s')\n", toChars());
+#endif
+if (!type)
+{
+	e1 = e1->semantic(sc);
+	type = new TypeDelegate(func->type);
+	type = type->semantic(loc, sc);
+//-----------------
+	/* For func, we need to get the
+	 * right 'this' pointer if func is in an outer class, but our
+	 * existing 'this' pointer is in an inner class.
+	 * This code is analogous to that used for variables
+	 * in DotVarExp::semantic().
+	 */
+	AggregateDeclaration *ad = func->toParent()->isAggregateDeclaration();
+L10:
+	Type *t = e1->type;
+	if (func->needThis() && ad &&
+	    !(t->ty == Tpointer && t->next->ty == Tstruct &&
+	      ((TypeStruct *)t->next)->sym == ad) &&
+	    !(t->ty == Tstruct && ((TypeStruct *)t)->sym == ad)
+	   )
+	{
+	    ClassDeclaration *cd = ad->isClassDeclaration();
+	    ClassDeclaration *tcd = t->isClassHandle();
+	    if (!cd || !tcd ||
+		!(tcd == cd || cd->isBaseOf(tcd, NULL))
+	       )
+	    {
+		if (tcd && tcd->isNested())
+		{   // Try again with outer scope
+		    e1 = new DotVarExp(loc, e1, tcd->vthis);
+		    e1 = e1->semantic(sc);
+		    goto L10;
+		}
+#ifdef DEBUG
+		printf("3: ");
+#endif
+		error("this for %s needs to be type %s not type %s",
+		    func->toChars(), ad->toChars(), t->toChars());
+	    }
+	}
+//-----------------
+}
+return this;
+}
+void DelegateExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writeByte('&');
+if (!func->isNested())
+{
+	expToCBuffer(buf, hgs, e1, PREC_primary);
+	buf->writeByte('.');
+}
+buf->writestring(func->toChars());
+}
+/************************************************************/
+DotTypeExp::DotTypeExp(Loc loc, Expression *e, Dsymbol *s)
+	: UnaExp(loc, TOKdottype, sizeof(DotTypeExp), e)
+{
+this->sym = s;
+this->type = s->getType();
+}
+Expression *DotTypeExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("DotTypeExp::semantic('%s')\n", toChars());
+#endif
+UnaExp::semantic(sc);
+return this;
+}
+void DotTypeExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, e1, PREC_primary);
+buf->writeByte('.');
+buf->writestring(sym->toChars());
+}
+/************************************************************/
+CallExp::CallExp(Loc loc, Expression *e, Expressions *exps)
+	: UnaExp(loc, TOKcall, sizeof(CallExp), e)
+{
+this->arguments = exps;
+}
+CallExp::CallExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKcall, sizeof(CallExp), e)
+{
+this->arguments = NULL;
+}
+CallExp::CallExp(Loc loc, Expression *e, Expression *earg1)
+	: UnaExp(loc, TOKcall, sizeof(CallExp), e)
+{
+Expressions *arguments = new Expressions();
+arguments->setDim(1);
+arguments->data[0] = (void *)earg1;
+this->arguments = arguments;
+}
+CallExp::CallExp(Loc loc, Expression *e, Expression *earg1, Expression *earg2)
+	: UnaExp(loc, TOKcall, sizeof(CallExp), e)
+{
+Expressions *arguments = new Expressions();
+arguments->setDim(2);
+arguments->data[0] = (void *)earg1;
+arguments->data[1] = (void *)earg2;
+this->arguments = arguments;
+}
+Expression *CallExp::syntaxCopy()
+{
+return new CallExp(loc, e1->syntaxCopy(), arraySyntaxCopy(arguments));
+}
+Expression *CallExp::semantic(Scope *sc)
+{
+TypeFunction *tf;
+FuncDeclaration *f;
+int i;
+Type *t1;
+int istemp;
+#if LOGSEMANTIC
+printf("CallExp::semantic('%s')\n", toChars());
+#endif
+if (type)
+	return this;		// semantic() already run
+#if 0
+if (arguments && arguments->dim)
+{
+	Expression *earg = (Expression *)arguments->data[0];
+	earg->print();
+	if (earg->type) earg->type->print();
+}
+#endif
+if (e1->op == TOKdelegate)
+{	DelegateExp *de = (DelegateExp *)e1;
+	e1 = new DotVarExp(de->loc, de->e1, de->func);
+	return semantic(sc);
+}
+/* Transform:
+*	array.id(args) into id(array,args)
+*	aa.remove(arg) into delete aa[arg]
+*/
+if (e1->op == TOKdot)
+{
+	// BUG: we should handle array.a.b.c.e(args) too
+	DotIdExp *dotid = (DotIdExp *)(e1);
+	dotid->e1 = dotid->e1->semantic(sc);
+	assert(dotid->e1);
+	if (dotid->e1->type)
+	{
+	    TY e1ty = dotid->e1->type->toBasetype()->ty;
+	    if (e1ty == Taarray && dotid->ident == Id::remove)
+	    {
+		if (!arguments || arguments->dim != 1)
+		{   error("expected key as argument to aa.remove()");
+		    goto Lagain;
+		}
+		Expression *key = (Expression *)arguments->data[0];
+		key = key->semantic(sc);
+		key = resolveProperties(sc, key);
+		key->rvalue();
+		TypeAArray *taa = (TypeAArray *)dotid->e1->type->toBasetype();
+		key = key->implicitCastTo(sc, taa->index);
+		key = key->implicitCastTo(sc, taa->key);
+		return new RemoveExp(loc, dotid->e1, key);
+	    }
+	    else if (e1ty == Tarray || e1ty == Tsarray || e1ty == Taarray)
+	    {
+		if (!arguments)
+		    arguments = new Expressions();
+		arguments->shift(dotid->e1);
+		e1 = new IdentifierExp(dotid->loc, dotid->ident);
+	    }
+	}
+}
+istemp = 0;
+Lagain:
+f = NULL;
+if (e1->op == TOKthis || e1->op == TOKsuper)
+{
+	// semantic() run later for these
+}
+else
+{
+	UnaExp::semantic(sc);
+	/* Look for e1 being a lazy parameter
+	 */
+	if (e1->op == TOKvar)
+	{   VarExp *ve = (VarExp *)e1;
+	    if (ve->var->storage_class & STClazy)
+	    {
+		TypeFunction *tf = new TypeFunction(NULL, ve->var->type, 0, LINKd);
+		TypeDelegate *t = new TypeDelegate(tf);
+		ve->type = t->semantic(loc, sc);
+	    }
+	}
+	if (e1->op == TOKimport)
+	{   // Perhaps this should be moved to ScopeExp::semantic()
+	    ScopeExp *se = (ScopeExp *)e1;
+	    e1 = new DsymbolExp(loc, se->sds);
+	    e1 = e1->semantic(sc);
+	}
+#if 1	// patch for #540 by Oskar Linde
+	else if (e1->op == TOKdotexp)
+	{
+	    DotExp *de = (DotExp *) e1;
+	    if (de->e2->op == TOKimport)
+	    {   // This should *really* be moved to ScopeExp::semantic()
+		ScopeExp *se = (ScopeExp *)de->e2;
+		de->e2 = new DsymbolExp(loc, se->sds);
+		de->e2 = de->e2->semantic(sc);
+	    }
+	    if (de->e2->op == TOKtemplate)
+	    {   TemplateExp *te = (TemplateExp *) de->e2;
+		e1 = new DotTemplateExp(loc,de->e1,te->td);
+	    }
+	}
+#endif
+}
+if (e1->op == TOKcomma)
+{
+	CommaExp *ce = (CommaExp *)e1;
+	e1 = ce->e2;
+	e1->type = ce->type;
+	ce->e2 = this;
+	ce->type = NULL;
+	return ce->semantic(sc);
+}
+t1 = NULL;
+if (e1->type)
+	t1 = e1->type->toBasetype();
+// Check for call operator overload
+if (t1)
+{	AggregateDeclaration *ad;
+	if (t1->ty == Tstruct)
+	{
+	    ad = ((TypeStruct *)t1)->sym;
+	    if (search_function(ad, Id::call))
+		goto L1;	// overload of opCall, therefore it's a call
+	    /* It's a struct literal
+	     */
+	    Expression *e = new StructLiteralExp(loc, (StructDeclaration *)ad, arguments);
+	    e = e->semantic(sc);
+	    return e;
+	}
+	else if (t1->ty == Tclass)
+	{
+	    ad = ((TypeClass *)t1)->sym;
+	    goto L1;
+	L1:
+	    // Rewrite as e1.call(arguments)
+	    Expression *e = new DotIdExp(loc, e1, Id::call);
+	    e = new CallExp(loc, e, arguments);
+	    e = e->semantic(sc);
+	    return e;
+	}
+}
+arrayExpressionSemantic(arguments, sc);
+preFunctionArguments(loc, sc, arguments);
+if (e1->op == TOKdotvar && t1->ty == Tfunction ||
+e1->op == TOKdottd)
+{
+	DotVarExp *dve;
+	DotTemplateExp *dte;
+	AggregateDeclaration *ad;
+	UnaExp *ue = (UnaExp *)(e1);
+	if (e1->op == TOKdotvar)
+{   // Do overload resolution
+	    dve = (DotVarExp *)(e1);
+	    f = dve->var->isFuncDeclaration();
+	    assert(f);
+	    f = f->overloadResolve(loc, arguments);
+	    ad = f->toParent()->isAggregateDeclaration();
+	}
+else
+{   dte = (DotTemplateExp *)(e1);
+	    TemplateDeclaration *td = dte->td;
+	    assert(td);
+	    if (!arguments)
+		// Should fix deduce() so it works on NULL argument
+		arguments = new Expressions();
+	    f = td->deduce(sc, loc, NULL, arguments);
+	    if (!f)
+	    {	type = Type::terror;
+		return this;
+	    }
+	    ad = td->toParent()->isAggregateDeclaration();
+	}
+	/* Now that we have the right function f, we need to get the
+	 * right 'this' pointer if f is in an outer class, but our
+	 * existing 'this' pointer is in an inner class.
+	 * This code is analogous to that used for variables
+	 * in DotVarExp::semantic().
+	 */
+L10:
+	Type *t = ue->e1->type->toBasetype();
+	if (f->needThis() && ad &&
+	    !(t->ty == Tpointer && t->next->ty == Tstruct &&
+	      ((TypeStruct *)t->next)->sym == ad) &&
+	    !(t->ty == Tstruct && ((TypeStruct *)t)->sym == ad)
+	   )
+	{
+	    ClassDeclaration *cd = ad->isClassDeclaration();
+	    ClassDeclaration *tcd = t->isClassHandle();
+	    if (!cd || !tcd ||
+		!(tcd == cd || cd->isBaseOf(tcd, NULL))
+	       )
+	    {
+		if (tcd && tcd->isNested())
+		{   // Try again with outer scope
+		    ue->e1 = new DotVarExp(loc, ue->e1, tcd->vthis);
+		    ue->e1 = ue->e1->semantic(sc);
+		    goto L10;
+		}
+#ifdef DEBUG
+		printf("1: ");
+#endif
+		error("this for %s needs to be type %s not type %s",
+		    f->toChars(), ad->toChars(), t->toChars());
+	    }
+	}
+	checkDeprecated(sc, f);
+	accessCheck(loc, sc, ue->e1, f);
+	if (!f->needThis())
+	{
+	    VarExp *ve = new VarExp(loc, f);
+	    e1 = new CommaExp(loc, ue->e1, ve);
+	    e1->type = f->type;
+	}
+	else
+	{
+	    if (e1->op == TOKdotvar)
+		dve->var = f;
+	    else
+		e1 = new DotVarExp(loc, dte->e1, f);
+	    e1->type = f->type;
+	    // See if we need to adjust the 'this' pointer
+	    AggregateDeclaration *ad = f->isThis();
+	    ClassDeclaration *cd = ue->e1->type->isClassHandle();
+	    if (ad && cd && ad->isClassDeclaration() && ad != cd &&
+		ue->e1->op != TOKsuper)
+	    {
+		ue->e1 = ue->e1->castTo(sc, ad->type); //new CastExp(loc, ue->e1, ad->type);
+		ue->e1 = ue->e1->semantic(sc);
+	    }
+	}
+	t1 = e1->type;
+}
+else if (e1->op == TOKsuper)
+{
+	// Base class constructor call
+	ClassDeclaration *cd = NULL;
+	if (sc->func)
+	    cd = sc->func->toParent()->isClassDeclaration();
+	if (!cd || !cd->baseClass || !sc->func->isCtorDeclaration())
+	{
+	    error("super class constructor call must be in a constructor");
+	    type = Type::terror;
+	    return this;
+	}
+	else
+	{
+	    f = cd->baseClass->ctor;
+	    if (!f)
+	    {	error("no super class constructor for %s", cd->baseClass->toChars());
+		type = Type::terror;
+		return this;
+	    }
+	    else
+	    {
+#if 0
+		if (sc->callSuper & (CSXthis | CSXsuper))
+		    error("reference to this before super()");
+#endif
+		if (sc->noctor || sc->callSuper & CSXlabel)
+		    error("constructor calls not allowed in loops or after labels");
+		if (sc->callSuper & (CSXsuper_ctor | CSXthis_ctor))
+		    error("multiple constructor calls");
+		sc->callSuper |= CSXany_ctor | CSXsuper_ctor;
+		f = f->overloadResolve(loc, arguments);
+		checkDeprecated(sc, f);
+		e1 = new DotVarExp(e1->loc, e1, f);
+		e1 = e1->semantic(sc);
+		t1 = e1->type;
+	    }
+	}
+}
+else if (e1->op == TOKthis)
+{
+	// same class constructor call
+	ClassDeclaration *cd = NULL;
+	if (sc->func)
+	    cd = sc->func->toParent()->isClassDeclaration();
+	if (!cd || !sc->func->isCtorDeclaration())
+	{
+	    error("class constructor call must be in a constructor");
+	    type = Type::terror;
+	    return this;
+	}
+	else
+	{
+#if 0
+	    if (sc->callSuper & (CSXthis | CSXsuper))
+		error("reference to this before super()");
+#endif
+	    if (sc->noctor || sc->callSuper & CSXlabel)
+		error("constructor calls not allowed in loops or after labels");
+	    if (sc->callSuper & (CSXsuper_ctor | CSXthis_ctor))
+		error("multiple constructor calls");
+	    sc->callSuper |= CSXany_ctor | CSXthis_ctor;
+	    f = cd->ctor;
+	    f = f->overloadResolve(loc, arguments);
+	    checkDeprecated(sc, f);
+	    e1 = new DotVarExp(e1->loc, e1, f);
+	    e1 = e1->semantic(sc);
+	    t1 = e1->type;
+	    // BUG: this should really be done by checking the static
+	    // call graph
+	    if (f == sc->func)
+		error("cyclic constructor call");
+	}
+}
+else if (!t1)
+{
+	error("function expected before (), not '%s'", e1->toChars());
+	type = Type::terror;
+	return this;
+}
+else if (t1->ty != Tfunction)
+{
+	if (t1->ty == Tdelegate)
+	{
+	    assert(t1->next->ty == Tfunction);
+	    tf = (TypeFunction *)(t1->next);
+	    goto Lcheckargs;
+	}
+	else if (t1->ty == Tpointer && t1->next->ty == Tfunction)
+	{   Expression *e;
+	    e = new PtrExp(loc, e1);
+	    t1 = t1->next;
+	    e->type = t1;
+	    e1 = e;
+	}
+	else if (e1->op == TOKtemplate)
+	{
+	    TemplateExp *te = (TemplateExp *)e1;
+	    f = te->td->deduce(sc, loc, NULL, arguments);
+	    if (!f)
+	    {	type = Type::terror;
+		return this;
+	    }
+	    if (f->needThis() && hasThis(sc))
+	    {
+		// Supply an implicit 'this', as in
+		//	  this.ident
+		e1 = new DotTemplateExp(loc, (new ThisExp(loc))->semantic(sc), te->td);
+		goto Lagain;
+	    }
+	    e1 = new VarExp(loc, f);
+	    goto Lagain;
+	}
+	else
+	{   error("function expected before (), not %s of type %s", e1->toChars(), e1->type->toChars());
+	    type = Type::terror;
+	    return this;
+	}
+}
+else if (e1->op == TOKvar)
+{
+	// Do overload resolution
+	VarExp *ve = (VarExp *)e1;
+	f = ve->var->isFuncDeclaration();
+	assert(f);
+	// Look to see if f is really a function template
+	if (0 && !istemp && f->parent)
+	{   TemplateInstance *ti = f->parent->isTemplateInstance();
+	    if (ti &&
+		(ti->name == f->ident ||
+		 ti->toAlias()->ident == f->ident)
+		&&
+		ti->tempdecl)
+	    {
+		/* This is so that one can refer to the enclosing
+		 * template, even if it has the same name as a member
+		 * of the template, if it has a !(arguments)
+		 */
+		TemplateDeclaration *tempdecl = ti->tempdecl;
+		if (tempdecl->overroot)         // if not start of overloaded list of TemplateDeclaration's
+		    tempdecl = tempdecl->overroot; // then get the start
+		e1 = new TemplateExp(loc, tempdecl);
+		istemp = 1;
+		goto Lagain;
+	    }
+	}
+	f = f->overloadResolve(loc, arguments);
+	checkDeprecated(sc, f);
+	if (f->needThis() && hasThis(sc))
+	{
+	    // Supply an implicit 'this', as in
+	    //	  this.ident
+	    e1 = new DotVarExp(loc, new ThisExp(loc), f);
+	    goto Lagain;
+	}
+	accessCheck(loc, sc, NULL, f);
+	ve->var = f;
+	ve->type = f->type;
+	t1 = f->type;
+}
+assert(t1->ty == Tfunction);
+tf = (TypeFunction *)(t1);
+Lcheckargs:
+assert(tf->ty == Tfunction);
+type = tf->next;
+if (!arguments)
+	arguments = new Expressions();
+functionArguments(loc, sc, tf, arguments);
+assert(type);
+if (f && f->tintro)
+{
+	Type *t = type;
+	int offset = 0;
+	if (f->tintro->next->isBaseOf(t, &offset) && offset)
+	{
+	    type = f->tintro->next;
+	    return castTo(sc, t);
+	}
+}
+return this;
+}
+int CallExp::checkSideEffect(int flag)
+{
+return 1;
+}
+Expression *CallExp::toLvalue(Scope *sc, Expression *e)
+{
+if (type->toBasetype()->ty == Tstruct)
+	return this;
+else
+	return Expression::toLvalue(sc, e);
+}
+void CallExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{   int i;
+expToCBuffer(buf, hgs, e1, precedence[op]);
+buf->writeByte('(');
+argsToCBuffer(buf, arguments, hgs);
+buf->writeByte(')');
+}
+/************************************************************/
+AddrExp::AddrExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKaddress, sizeof(AddrExp), e)
+{
+}
+Expression *AddrExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("AddrExp::semantic('%s')\n", toChars());
+#endif
+if (!type)
+{
+	UnaExp::semantic(sc);
+	e1 = e1->toLvalue(sc, NULL);
+	if (!e1->type)
+	{
+	    error("cannot take address of %s", e1->toChars());
+	    type = Type::tint32;
+	    return this;
+	}
+	type = e1->type->pointerTo();
+	// See if this should really be a delegate
+	if (e1->op == TOKdotvar)
+	{
+	    DotVarExp *dve = (DotVarExp *)e1;
+	    FuncDeclaration *f = dve->var->isFuncDeclaration();
+	    if (f)
+	    {	Expression *e;
+		e = new DelegateExp(loc, dve->e1, f);
+		e = e->semantic(sc);
+		return e;
+	    }
+	}
+	else if (e1->op == TOKvar)
+	{
+	    VarExp *dve = (VarExp *)e1;
+	    FuncDeclaration *f = dve->var->isFuncDeclaration();
+	    if (f && f->isNested())
+	    {	Expression *e;
+		e = new DelegateExp(loc, e1, f);
+		e = e->semantic(sc);
+		return e;
+	    }
+	}
+	else if (e1->op == TOKarray)
+	{
+	    if (e1->type->toBasetype()->ty == Tbit)
+		error("cannot take address of bit in array");
+	}
+	return optimize(WANTvalue);
+}
+return this;
+}
+/************************************************************/
+PtrExp::PtrExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKstar, sizeof(PtrExp), e)
+{
+if (e->type)
+	type = e->type->next;
+}
+PtrExp::PtrExp(Loc loc, Expression *e, Type *t)
+	: UnaExp(loc, TOKstar, sizeof(PtrExp), e)
+{
+type = t;
+}
+Expression *PtrExp::semantic(Scope *sc)
+{   Type *tb;
+#if LOGSEMANTIC
+printf("PtrExp::semantic('%s')\n", toChars());
+#endif
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+if (type)
+	return this;
+if (!e1->type)
+	printf("PtrExp::semantic('%s')\n", toChars());
+tb = e1->type->toBasetype();
+switch (tb->ty)
+{
+	case Tpointer:
+	    type = tb->next;
+	    if (type->isbit())
+	    {	Expression *e;
+		// Rewrite *p as p[0]
+		e = new IndexExp(loc, e1, new IntegerExp(0));
+		return e->semantic(sc);
+	    }
+	    break;
+	case Tsarray:
+	case Tarray:
+	    type = tb->next;
+	    e1 = e1->castTo(sc, type->pointerTo());
+	    break;
+	default:
+	    error("can only * a pointer, not a '%s'", e1->type->toChars());
+	    type = Type::tint32;
+	    break;
+}
+rvalue();
+return this;
+}
+Expression *PtrExp::toLvalue(Scope *sc, Expression *e)
+{
+#if 0
+tym = tybasic(e1->ET->Tty);
+if (!(tyscalar(tym) ||
+	  tym == TYstruct ||
+	  tym == TYarray && e->Eoper == TOKaddr))
+	    synerr(EM_lvalue);	// lvalue expected
+#endif
+return this;
+}
+void PtrExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writeByte('*');
+expToCBuffer(buf, hgs, e1, precedence[op]);
+}
+/************************************************************/
+NegExp::NegExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKneg, sizeof(NegExp), e)
+{
+}
+Expression *NegExp::semantic(Scope *sc)
+{   Expression *e;
+#if LOGSEMANTIC
+printf("NegExp::semantic('%s')\n", toChars());
+#endif
+if (!type)
+{
+	UnaExp::semantic(sc);
+	e1 = resolveProperties(sc, e1);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	e1->checkNoBool();
+	e1->checkArithmetic();
+	type = e1->type;
+}
+return this;
+}
+/************************************************************/
+UAddExp::UAddExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKuadd, sizeof(UAddExp), e)
+{
+}
+Expression *UAddExp::semantic(Scope *sc)
+{   Expression *e;
+#if LOGSEMANTIC
+printf("UAddExp::semantic('%s')\n", toChars());
+#endif
+assert(!type);
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+e = op_overload(sc);
+if (e)
+	return e;
+e1->checkNoBool();
+e1->checkArithmetic();
+return e1;
+}
+/************************************************************/
+ComExp::ComExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKtilde, sizeof(ComExp), e)
+{
+}
+Expression *ComExp::semantic(Scope *sc)
+{   Expression *e;
+if (!type)
+{
+	UnaExp::semantic(sc);
+	e1 = resolveProperties(sc, e1);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	e1->checkNoBool();
+	e1 = e1->checkIntegral();
+	type = e1->type;
+}
+return this;
+}
+/************************************************************/
+NotExp::NotExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKnot, sizeof(NotExp), e)
+{
+}
+Expression *NotExp::semantic(Scope *sc)
+{
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+e1 = e1->checkToBoolean();
+type = Type::tboolean;
+return this;
+}
+int NotExp::isBit()
+{
+return TRUE;
+}
+/************************************************************/
+BoolExp::BoolExp(Loc loc, Expression *e, Type *t)
+	: UnaExp(loc, TOKtobool, sizeof(BoolExp), e)
+{
+type = t;
+}
+Expression *BoolExp::semantic(Scope *sc)
+{
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+e1 = e1->checkToBoolean();
+type = Type::tboolean;
+return this;
+}
+int BoolExp::isBit()
+{
+return TRUE;
+}
+/************************************************************/
+DeleteExp::DeleteExp(Loc loc, Expression *e)
+	: UnaExp(loc, TOKdelete, sizeof(DeleteExp), e)
+{
+}
+Expression *DeleteExp::semantic(Scope *sc)
+{
+Type *tb;
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+e1 = e1->toLvalue(sc, NULL);
+type = Type::tvoid;
+tb = e1->type->toBasetype();
+switch (tb->ty)
+{	case Tclass:
+	{   TypeClass *tc = (TypeClass *)tb;
+	    ClassDeclaration *cd = tc->sym;
+	    if (cd->isInterfaceDeclaration() && cd->isCOMclass())
+		error("cannot delete instance of COM interface %s", cd->toChars());
+	    break;
+	}
+	case Tpointer:
+	    tb = tb->next->toBasetype();
+	    if (tb->ty == Tstruct)
+	    {
+		TypeStruct *ts = (TypeStruct *)tb;
+		StructDeclaration *sd = ts->sym;
+		FuncDeclaration *f = sd->aggDelete;
+		if (f)
+		{
+		    Expression *e;
+		    Expression *ec;
+		    Type *tpv = Type::tvoid->pointerTo();
+		    e = e1;
+		    e->type = tpv;
+		    ec = new VarExp(loc, f);
+		    e = new CallExp(loc, ec, e);
+		    return e->semantic(sc);
+		}
+	    }
+	    break;
+	case Tarray:
+	    break;
+	default:
+	    if (e1->op == TOKindex)
+	    {
+		IndexExp *ae = (IndexExp *)(e1);
+		Type *tb1 = ae->e1->type->toBasetype();
+		if (tb1->ty == Taarray)
+		    break;
+	    }
+	    error("cannot delete type %s", e1->type->toChars());
+	    break;
+}
+if (e1->op == TOKindex)
+{
+	IndexExp *ae = (IndexExp *)(e1);
+	Type *tb1 = ae->e1->type->toBasetype();
+	if (tb1->ty == Taarray)
+	{   if (!global.params.useDeprecated)
+		error("delete aa[key] deprecated, use aa.remove(key)");
+	}
+}
+return this;
+}
+int DeleteExp::checkSideEffect(int flag)
+{
+return 1;
+}
+Expression *DeleteExp::checkToBoolean()
+{
+error("delete does not give a boolean result");
+return this;
+}
+void DeleteExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("delete ");
+expToCBuffer(buf, hgs, e1, precedence[op]);
+}
+/************************************************************/
+CastExp::CastExp(Loc loc, Expression *e, Type *t)
+	: UnaExp(loc, TOKcast, sizeof(CastExp), e)
+{
+to = t;
+}
+Expression *CastExp::syntaxCopy()
+{
+return new CastExp(loc, e1->syntaxCopy(), to->syntaxCopy());
+}
+Expression *CastExp::semantic(Scope *sc)
+{   Expression *e;
+BinExp *b;
+UnaExp *u;
+#if LOGSEMANTIC
+printf("CastExp::semantic('%s')\n", toChars());
+#endif
+//static int x; assert(++x < 10);
+if (type)
+	return this;
+UnaExp::semantic(sc);
+if (e1->type)		// if not a tuple
+{
+	e1 = resolveProperties(sc, e1);
+	to = to->semantic(loc, sc);
+	e = op_overload(sc);
+	if (e)
+	{
+	    return e->implicitCastTo(sc, to);
+	}
+	Type *tob = to->toBasetype();
+	if (tob->ty == Tstruct && !tob->equals(e1->type->toBasetype()))
+	{
+	    /* Look to replace:
+	     *	cast(S)t
+	     * with:
+	     *	S(t)
+	     */
+	    // Rewrite as to.call(e1)
+	    e = new TypeExp(loc, to);
+	    e = new DotIdExp(loc, e, Id::call);
+	    e = new CallExp(loc, e, e1);
+	    e = e->semantic(sc);
+	    return e;
+	}
+}
+e = e1->castTo(sc, to);
+return e;
+}
+int CastExp::checkSideEffect(int flag)
+{
+/* if not:
+*  cast(void)
+*  cast(classtype)func()
+*/
+if (!to->equals(Type::tvoid) &&
+	!(to->ty == Tclass && e1->op == TOKcall && e1->type->ty == Tclass))
+	return Expression::checkSideEffect(flag);
+return 1;
+}
+void CastExp::checkEscape()
+{   Type *tb = type->toBasetype();
+if (tb->ty == Tarray && e1->op == TOKvar &&
+	e1->type->toBasetype()->ty == Tsarray)
+{	VarExp *ve = (VarExp *)e1;
+	VarDeclaration *v = ve->var->isVarDeclaration();
+	if (v)
+	{
+	    if (!v->isDataseg() && !v->isParameter())
+		error("escaping reference to local %s", v->toChars());
+	}
+}
+}
+void CastExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("cast(");
+to->toCBuffer(buf, NULL, hgs);
+buf->writeByte(')');
+expToCBuffer(buf, hgs, e1, precedence[op]);
+}
+/************************************************************/
+SliceExp::SliceExp(Loc loc, Expression *e1, Expression *lwr, Expression *upr)
+	: UnaExp(loc, TOKslice, sizeof(SliceExp), e1)
+{
+this->upr = upr;
+this->lwr = lwr;
+lengthVar = NULL;
+}
+Expression *SliceExp::syntaxCopy()
+{
+Expression *lwr = NULL;
+if (this->lwr)
+	lwr = this->lwr->syntaxCopy();
+Expression *upr = NULL;
+if (this->upr)
+	upr = this->upr->syntaxCopy();
+return new SliceExp(loc, e1->syntaxCopy(), lwr, upr);
+}
+Expression *SliceExp::semantic(Scope *sc)
+{   Expression *e;
+AggregateDeclaration *ad;
+//FuncDeclaration *fd;
+ScopeDsymbol *sym;
+#if LOGSEMANTIC
+printf("SliceExp::semantic('%s')\n", toChars());
+#endif
+if (type)
+	return this;
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+e = this;
+Type *t = e1->type->toBasetype();
+if (t->ty == Tpointer)
+{
+	if (!lwr || !upr)
+	    error("need upper and lower bound to slice pointer");
+}
+else if (t->ty == Tarray)
+{
+}
+else if (t->ty == Tsarray)
+{
+}
+else if (t->ty == Tclass)
+{
+ad = ((TypeClass *)t)->sym;
+goto L1;
+}
+else if (t->ty == Tstruct)
+{
+ad = ((TypeStruct *)t)->sym;
+L1:
+	if (search_function(ad, Id::slice))
+{
+// Rewrite as e1.slice(lwr, upr)
+	    e = new DotIdExp(loc, e1, Id::slice);
+	    if (lwr)
+	    {
+		assert(upr);
+		e = new CallExp(loc, e, lwr, upr);
+	    }
+	    else
+	    {	assert(!upr);
+		e = new CallExp(loc, e);
+	    }
+	    e = e->semantic(sc);
+	    return e;
+}
+	goto Lerror;
+}
+else if (t->ty == Ttuple)
+{
+	if (!lwr && !upr)
+	    return e1;
+	if (!lwr || !upr)
+	{   error("need upper and lower bound to slice tuple");
+	    goto Lerror;
+	}
+}
+else
+	goto Lerror;
+if (t->ty == Tsarray || t->ty == Tarray || t->ty == Ttuple)
+{
+	sym = new ArrayScopeSymbol(this);
+	sym->loc = loc;
+	sym->parent = sc->scopesym;
+	sc = sc->push(sym);
+}
+if (lwr)
+{	lwr = lwr->semantic(sc);
+	lwr = resolveProperties(sc, lwr);
+	lwr = lwr->implicitCastTo(sc, Type::tsize_t);
+}
+if (upr)
+{	upr = upr->semantic(sc);
+	upr = resolveProperties(sc, upr);
+	upr = upr->implicitCastTo(sc, Type::tsize_t);
+}
+if (t->ty == Tsarray || t->ty == Tarray || t->ty == Ttuple)
+	sc->pop();
+if (t->ty == Ttuple)
+{
+	lwr = lwr->optimize(WANTvalue);
+	upr = upr->optimize(WANTvalue);
+	uinteger_t i1 = lwr->toUInteger();
+	uinteger_t i2 = upr->toUInteger();
+	size_t length;
+	TupleExp *te;
+	TypeTuple *tup;
+	if (e1->op == TOKtuple)		// slicing an expression tuple
+	{   te = (TupleExp *)e1;
+	    length = te->exps->dim;
+	}
+	else if (e1->op == TOKtype)	// slicing a type tuple
+	{   tup = (TypeTuple *)t;
+	    length = Argument::dim(tup->arguments);
+	}
+	else
+	    assert(0);
+	if (i1 <= i2 && i2 <= length)
+	{   size_t j1 = (size_t) i1;
+	    size_t j2 = (size_t) i2;
+	    if (e1->op == TOKtuple)
+	    {	Expressions *exps = new Expressions;
+		exps->setDim(j2 - j1);
+		for (size_t i = 0; i < j2 - j1; i++)
+		{   Expression *e = (Expression *)te->exps->data[j1 + i];
+		    exps->data[i] = (void *)e;
+		}
+		e = new TupleExp(loc, exps);
+	    }
+	    else
+	    {	Arguments *args = new Arguments;
+		args->reserve(j2 - j1);
+		for (size_t i = j1; i < j2; i++)
+		{   Argument *arg = Argument::getNth(tup->arguments, i);
+		    args->push(arg);
+		}
+		e = new TypeExp(e1->loc, new TypeTuple(args));
+	    }
+	    e = e->semantic(sc);
+	}
+	else
+	{
+	    error("string slice [%ju .. %ju] is out of bounds", i1, i2);
+	    e = e1;
+	}
+	return e;
+}
+type = t->next->arrayOf();
+return e;
+Lerror:
+char *s;
+if (t->ty == Tvoid)
+	s = e1->toChars();
+else
+	s = t->toChars();
+error("%s cannot be sliced with []", s);
+type = Type::terror;
+return e;
+}
+void SliceExp::checkEscape()
+{
+e1->checkEscape();
+}
+Expression *SliceExp::toLvalue(Scope *sc, Expression *e)
+{
+return this;
+}
+Expression *SliceExp::modifiableLvalue(Scope *sc, Expression *e)
+{
+error("slice expression %s is not a modifiable lvalue", toChars());
+return this;
+}
+void SliceExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, e1, precedence[op]);
+buf->writeByte('[');
+if (upr || lwr)
+{
+	if (lwr)
+	    expToCBuffer(buf, hgs, lwr, PREC_assign);
+	else
+	    buf->writeByte('0');
+	buf->writestring("..");
+	if (upr)
+	    expToCBuffer(buf, hgs, upr, PREC_assign);
+	else
+	    buf->writestring("length");		// BUG: should be array.length
+}
+buf->writeByte(']');
+}
+/********************** ArrayLength **************************************/
+ArrayLengthExp::ArrayLengthExp(Loc loc, Expression *e1)
+	: UnaExp(loc, TOKarraylength, sizeof(ArrayLengthExp), e1)
+{
+}
+Expression *ArrayLengthExp::semantic(Scope *sc)
+{   Expression *e;
+#if LOGSEMANTIC
+printf("ArrayLengthExp::semantic('%s')\n", toChars());
+#endif
+if (!type)
+{
+	UnaExp::semantic(sc);
+	e1 = resolveProperties(sc, e1);
+	type = Type::tsize_t;
+}
+return this;
+}
+void ArrayLengthExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, e1, PREC_primary);
+buf->writestring(".length");
+}
+/*********************** ArrayExp *************************************/
+// e1 [ i1, i2, i3, ... ]
+ArrayExp::ArrayExp(Loc loc, Expression *e1, Expressions *args)
+	: UnaExp(loc, TOKarray, sizeof(ArrayExp), e1)
+{
+arguments = args;
+}
+Expression *ArrayExp::syntaxCopy()
+{
+return new ArrayExp(loc, e1->syntaxCopy(), arraySyntaxCopy(arguments));
+}
+Expression *ArrayExp::semantic(Scope *sc)
+{   Expression *e;
+Type *t1;
+#if LOGSEMANTIC
+printf("ArrayExp::semantic('%s')\n", toChars());
+#endif
+UnaExp::semantic(sc);
+e1 = resolveProperties(sc, e1);
+t1 = e1->type->toBasetype();
+if (t1->ty != Tclass && t1->ty != Tstruct)
+{	// Convert to IndexExp
+	if (arguments->dim != 1)
+	    error("only one index allowed to index %s", t1->toChars());
+	e = new IndexExp(loc, e1, (Expression *)arguments->data[0]);
+	return e->semantic(sc);
+}
+// Run semantic() on each argument
+for (size_t i = 0; i < arguments->dim; i++)
+{	e = (Expression *)arguments->data[i];
+	e = e->semantic(sc);
+	if (!e->type)
+	    error("%s has no value", e->toChars());
+	arguments->data[i] = (void *)e;
+}
+expandTuples(arguments);
+assert(arguments && arguments->dim);
+e = op_overload(sc);
+if (!e)
+{	error("no [] operator overload for type %s", e1->type->toChars());
+	e = e1;
+}
+return e;
+}
+Expression *ArrayExp::toLvalue(Scope *sc, Expression *e)
+{
+if (type && type->toBasetype()->ty == Tvoid)
+	error("voids have no value");
+return this;
+}
+void ArrayExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{   int i;
+expToCBuffer(buf, hgs, e1, PREC_primary);
+buf->writeByte('[');
+argsToCBuffer(buf, arguments, hgs);
+buf->writeByte(']');
+}
+/************************* DotExp ***********************************/
+DotExp::DotExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKdotexp, sizeof(DotExp), e1, e2)
+{
+}
+Expression *DotExp::semantic(Scope *sc)
+{
+#if LOGSEMANTIC
+printf("DotExp::semantic('%s')\n", toChars());
+if (type) printf("\ttype = %s\n", type->toChars());
+#endif
+e1 = e1->semantic(sc);
+e2 = e2->semantic(sc);
+if (e2->op == TOKimport)
+{
+	ScopeExp *se = (ScopeExp *)e2;
+	TemplateDeclaration *td = se->sds->isTemplateDeclaration();
+	if (td)
+	{   Expression *e = new DotTemplateExp(loc, e1, td);
+	    e = e->semantic(sc);
+	    return e;
+	}
+}
+if (!type)
+	type = e2->type;
+return this;
+}
+/************************* CommaExp ***********************************/
+CommaExp::CommaExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKcomma, sizeof(CommaExp), e1, e2)
+{
+}
+Expression *CommaExp::semantic(Scope *sc)
+{
+if (!type)
+{	BinExp::semanticp(sc);
+	type = e2->type;
+}
+return this;
+}
+void CommaExp::checkEscape()
+{
+e2->checkEscape();
+}
+Expression *CommaExp::toLvalue(Scope *sc, Expression *e)
+{
+e2 = e2->toLvalue(sc, NULL);
+return this;
+}
+Expression *CommaExp::modifiableLvalue(Scope *sc, Expression *e)
+{
+e2 = e2->modifiableLvalue(sc, e);
+return this;
+}
+int CommaExp::isBool(int result)
+{
+return e2->isBool(result);
+}
+int CommaExp::checkSideEffect(int flag)
+{
+if (flag == 2)
+	return e1->checkSideEffect(2) || e2->checkSideEffect(2);
+else
+{
+	// Don't check e1 until we cast(void) the a,b code generation
+	return e2->checkSideEffect(flag);
+}
+}
+/************************** IndexExp **********************************/
+// e1 [ e2 ]
+IndexExp::IndexExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKindex, sizeof(IndexExp), e1, e2)
+{
+//printf("IndexExp::IndexExp('%s')\n", toChars());
+lengthVar = NULL;
+modifiable = 0;	// assume it is an rvalue
+}
+Expression *IndexExp::semantic(Scope *sc)
+{   Expression *e;
+BinExp *b;
+UnaExp *u;
+Type *t1;
+ScopeDsymbol *sym;
+#if LOGSEMANTIC
+printf("IndexExp::semantic('%s')\n", toChars());
+#endif
+if (type)
+	return this;
+if (!e1->type)
+	e1 = e1->semantic(sc);
+assert(e1->type);		// semantic() should already be run on it
+e = this;
+// Note that unlike C we do not implement the int[ptr]
+t1 = e1->type->toBasetype();
+if (t1->ty == Tsarray || t1->ty == Tarray || t1->ty == Ttuple)
+{	// Create scope for 'length' variable
+	sym = new ArrayScopeSymbol(this);
+	sym->loc = loc;
+	sym->parent = sc->scopesym;
+	sc = sc->push(sym);
+}
+e2 = e2->semantic(sc);
+if (!e2->type)
+{
+	error("%s has no value", e2->toChars());
+	e2->type = Type::terror;
+}
+e2 = resolveProperties(sc, e2);
+if (t1->ty == Tsarray || t1->ty == Tarray || t1->ty == Ttuple)
+	sc = sc->pop();
+switch (t1->ty)
+{
+	case Tpointer:
+	case Tarray:
+	    e2 = e2->implicitCastTo(sc, Type::tsize_t);
+	    e->type = t1->next;
+	    break;
+	case Tsarray:
+	{
+	    e2 = e2->implicitCastTo(sc, Type::tsize_t);
+	    TypeSArray *tsa = (TypeSArray *)t1;
+#if 0 	// Don't do now, because it might be short-circuit evaluated
+	    // Do compile time array bounds checking if possible
+	    e2 = e2->optimize(WANTvalue);
+	    if (e2->op == TOKint64)
+	    {
+		integer_t index = e2->toInteger();
+		integer_t length = tsa->dim->toInteger();
+		if (index < 0 || index >= length)
+		    error("array index [%lld] is outside array bounds [0 .. %lld]",
+			    index, length);
+	    }
+#endif
+	    e->type = t1->next;
+	    break;
+	}
+	case Taarray:
+	{   TypeAArray *taa = (TypeAArray *)t1;
+	    e2 = e2->implicitCastTo(sc, taa->index);	// type checking
+	    e2 = e2->implicitCastTo(sc, taa->key);	// actual argument type
+	    type = taa->next;
+	    break;
+	}
+	case Ttuple:
+	{
+	    e2 = e2->implicitCastTo(sc, Type::tsize_t);
+	    e2 = e2->optimize(WANTvalue);
+	    uinteger_t index = e2->toUInteger();
+	    size_t length;
+	    TupleExp *te;
+	    TypeTuple *tup;
+	    if (e1->op == TOKtuple)
+	    {	te = (TupleExp *)e1;
+		length = te->exps->dim;
+	    }
+	    else if (e1->op == TOKtype)
+	    {
+		tup = (TypeTuple *)t1;
+		length = Argument::dim(tup->arguments);
+	    }
+	    else
+		assert(0);
+	    if (index < length)
+	    {
+		if (e1->op == TOKtuple)
+		    e = (Expression *)te->exps->data[(size_t)index];
+		else
+		    e = new TypeExp(e1->loc, Argument::getNth(tup->arguments, (size_t)index)->type);
+	    }
+	    else
+	    {
+		error("array index [%ju] is outside array bounds [0 .. %zu]",
+			index, length);
+		e = e1;
+	    }
+	    break;
+	}
+	default:
+	    error("%s must be an array or pointer type, not %s",
+		e1->toChars(), e1->type->toChars());
+	    type = Type::tint32;
+	    break;
+}
+return e;
+}
+Expression *IndexExp::toLvalue(Scope *sc, Expression *e)
+{
+//    if (type && type->toBasetype()->ty == Tvoid)
+//	error("voids have no value");
+return this;
+}
+Expression *IndexExp::modifiableLvalue(Scope *sc, Expression *e)
+{
+//printf("IndexExp::modifiableLvalue(%s)\n", toChars());
+modifiable = 1;
+if (e1->op == TOKstring)
+	error("string literals are immutable");
+if (e1->type->toBasetype()->ty == Taarray)
+	e1 = e1->modifiableLvalue(sc, e1);
+return toLvalue(sc, e);
+}
+void IndexExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, e1, PREC_primary);
+buf->writeByte('[');
+expToCBuffer(buf, hgs, e2, PREC_assign);
+buf->writeByte(']');
+}
+/************************* PostExp ***********************************/
+PostExp::PostExp(enum TOK op, Loc loc, Expression *e)
+	: BinExp(loc, op, sizeof(PostExp), e,
+	  new IntegerExp(loc, 1, Type::tint32))
+{
+}
+Expression *PostExp::semantic(Scope *sc)
+{   Expression *e = this;
+if (!type)
+{
+	BinExp::semantic(sc);
+	e2 = resolveProperties(sc, e2);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	e = this;
+	e1 = e1->modifiableLvalue(sc, NULL);
+	e1->checkScalar();
+	e1->checkNoBool();
+	if (e1->type->ty == Tpointer)
+	    e = scaleFactor(sc);
+	else
+	    e2 = e2->castTo(sc, e1->type);
+	e->type = e1->type;
+}
+return e;
+}
+void PostExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, e1, precedence[op]);
+buf->writestring((op == TOKplusplus) ? (char *)"++" : (char *)"--");
+}
+/************************************************************/
+/* Can be TOKconstruct too */
+AssignExp::AssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKassign, sizeof(AssignExp), e1, e2)
+{
+ismemset = 0;
+}
+Expression *AssignExp::semantic(Scope *sc)
+{   Type *t1;
+Expression *e1old = e1;
+#if LOGSEMANTIC
+printf("AssignExp::semantic('%s')\n", toChars());
+#endif
+//printf("e1->op = %d, '%s'\n", e1->op, Token::toChars(e1->op));
+/* Look for operator overloading of a[i]=value.
+* Do it before semantic() otherwise the a[i] will have been
+* converted to a.opIndex() already.
+*/
+if (e1->op == TOKarray)
+{	Type *t1;
+	ArrayExp *ae = (ArrayExp *)e1;
+	AggregateDeclaration *ad;
+	Identifier *id = Id::index;
+	ae->e1 = ae->e1->semantic(sc);
+	t1 = ae->e1->type->toBasetype();
+	if (t1->ty == Tstruct)
+	{
+	    ad = ((TypeStruct *)t1)->sym;
+	    goto L1;
+	}
+	else if (t1->ty == Tclass)
+	{
+	    ad = ((TypeClass *)t1)->sym;
+	  L1:
+	    // Rewrite (a[i] = value) to (a.opIndexAssign(value, i))
+	    if (search_function(ad, Id::indexass))
+	    {	Expression *e = new DotIdExp(loc, ae->e1, Id::indexass);
+		Expressions *a = (Expressions *)ae->arguments->copy();
+		a->insert(0, e2);
+		e = new CallExp(loc, e, a);
+		e = e->semantic(sc);
+		return e;
+	    }
+	    else
+	    {
+		// Rewrite (a[i] = value) to (a.opIndex(i, value))
+		if (search_function(ad, id))
+		{   Expression *e = new DotIdExp(loc, ae->e1, id);
+		    if (1 || !global.params.useDeprecated)
+			error("operator [] assignment overload with opIndex(i, value) illegal, use opIndexAssign(value, i)");
+		    e = new CallExp(loc, e, (Expression *)ae->arguments->data[0], e2);
+		    e = e->semantic(sc);
+		    return e;
+		}
+	    }
+	}
+}
+/* Look for operator overloading of a[i..j]=value.
+* Do it before semantic() otherwise the a[i..j] will have been
+* converted to a.opSlice() already.
+*/
+if (e1->op == TOKslice)
+{	Type *t1;
+	SliceExp *ae = (SliceExp *)e1;
+	AggregateDeclaration *ad;
+	Identifier *id = Id::index;
+	ae->e1 = ae->e1->semantic(sc);
+	ae->e1 = resolveProperties(sc, ae->e1);
+	t1 = ae->e1->type->toBasetype();
+	if (t1->ty == Tstruct)
+	{
+	    ad = ((TypeStruct *)t1)->sym;
+	    goto L2;
+	}
+	else if (t1->ty == Tclass)
+	{
+	    ad = ((TypeClass *)t1)->sym;
+	  L2:
+	    // Rewrite (a[i..j] = value) to (a.opIndexAssign(value, i, j))
+	    if (search_function(ad, Id::sliceass))
+	    {	Expression *e = new DotIdExp(loc, ae->e1, Id::sliceass);
+		Expressions *a = new Expressions();
+		a->push(e2);
+		if (ae->lwr)
+		{   a->push(ae->lwr);
+		    assert(ae->upr);
+		    a->push(ae->upr);
+		}
+		else
+		    assert(!ae->upr);
+		e = new CallExp(loc, e, a);
+		e = e->semantic(sc);
+		return e;
+	    }
+	}
+}
+BinExp::semantic(sc);
+e2 = resolveProperties(sc, e2);
+assert(e1->type);
+t1 = e1->type->toBasetype();
+if (t1->ty == Tfunction)
+{	// Rewrite f=value to f(value)
+	Expression *e;
+	e = new CallExp(loc, e1, e2);
+	e = e->semantic(sc);
+	return e;
+}
+/* If it is an assignment from a 'foreign' type,
+* check for operator overloading.
+*/
+if (t1->ty == Tclass || t1->ty == Tstruct)
+{
+	if (!e2->type->implicitConvTo(e1->type))
+	{
+	    Expression *e = op_overload(sc);
+	    if (e)
+		return e;
+	}
+}
+e2->rvalue();
+if (e1->op == TOKarraylength)
+{
+	// e1 is not an lvalue, but we let code generator handle it
+	ArrayLengthExp *ale = (ArrayLengthExp *)e1;
+	ale->e1 = ale->e1->modifiableLvalue(sc, NULL);
+}
+else if (e1->op == TOKslice)
+	;
+else
+{	// Try to do a decent error message with the expression
+	// before it got constant folded
+	e1 = e1->modifiableLvalue(sc, e1old);
+}
+if (e1->op == TOKslice &&
+	t1->next &&
+	!(t1->next->equals(e2->type->next) /*||
+	  (t1->next->ty == Tchar && e2->op == TOKstring)*/)
+)
+{	// memset
+	e2 = e2->implicitCastTo(sc, t1->next);
+}
+#if 0
+else if (e1->op == TOKslice &&
+	     e2->op == TOKstring &&
+	     ((StringExp *)e2)->len == 1)
+{	// memset
+	e2 = e2->implicitCastTo(sc, e1->type->next);
+}
+#endif
+else if (t1->ty == Tsarray)
+{
+	error("cannot assign to static array %s", e1->toChars());
+}
+else
+{
+	e2 = e2->implicitCastTo(sc, e1->type);
+}
+type = e1->type;
+assert(type);
+return this;
+}
+Expression *AssignExp::checkToBoolean()
+{
+// Things like:
+//	if (a = b) ...
+// are usually mistakes.
+error("'=' does not give a boolean result");
+return this;
+}
+/************************************************************/
+AddAssignExp::AddAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKaddass, sizeof(AddAssignExp), e1, e2)
+{
+}
+Expression *AddAssignExp::semantic(Scope *sc)
+{   Expression *e;
+if (type)
+	return this;
+BinExp::semantic(sc);
+e2 = resolveProperties(sc, e2);
+e = op_overload(sc);
+if (e)
+	return e;
+e1 = e1->modifiableLvalue(sc, NULL);
+Type *tb1 = e1->type->toBasetype();
+Type *tb2 = e2->type->toBasetype();
+if ((tb1->ty == Tarray || tb1->ty == Tsarray) &&
+	(tb2->ty == Tarray || tb2->ty == Tsarray) &&
+	tb1->next->equals(tb2->next)
+)
+{
+	type = e1->type;
+	e = this;
+}
+else
+{
+	e1->checkScalar();
+	e1->checkNoBool();
+	if (tb1->ty == Tpointer && tb2->isintegral())
+	    e = scaleFactor(sc);
+	else if (tb1->ty == Tbit || tb1->ty == Tbool)
+	{
+#if 0
+	    // Need to rethink this
+	    if (e1->op != TOKvar)
+	    {   // Rewrite e1+=e2 to (v=&e1),*v=*v+e2
+		VarDeclaration *v;
+		Expression *ea;
+		Expression *ex;
+		char name[6+6+1];
+		Identifier *id;
+		static int idn;
+		sprintf(name, "__name%d", ++idn);
+		id = Lexer::idPool(name);
+		v = new VarDeclaration(loc, tb1->pointerTo(), id, NULL);
+		v->semantic(sc);
+		if (!sc->insert(v))
+		    assert(0);
+		v->parent = sc->func;
+		ea = new AddrExp(loc, e1);
+		ea = new AssignExp(loc, new VarExp(loc, v), ea);
+		ex = new VarExp(loc, v);
+		ex = new PtrExp(loc, ex);
+		e = new AddExp(loc, ex, e2);
+		e = new CastExp(loc, e, e1->type);
+		e = new AssignExp(loc, ex->syntaxCopy(), e);
+		e = new CommaExp(loc, ea, e);
+	    }
+	    else
+#endif
+	    {   // Rewrite e1+=e2 to e1=e1+e2
+		// BUG: doesn't account for side effects in e1
+		// BUG: other assignment operators for bits aren't handled at all
+		e = new AddExp(loc, e1, e2);
+		e = new CastExp(loc, e, e1->type);
+		e = new AssignExp(loc, e1->syntaxCopy(), e);
+	    }
+	    e = e->semantic(sc);
+	}
+	else
+	{
+	    type = e1->type;
+	    typeCombine(sc);
+	    e1->checkArithmetic();
+	    e2->checkArithmetic();
+	    if (type->isreal() || type->isimaginary())
+	    {
+		assert(global.errors || e2->type->isfloating());
+		e2 = e2->castTo(sc, e1->type);
+	    }
+	    e = this;
+	}
+}
+return e;
+}
+/************************************************************/
+MinAssignExp::MinAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKminass, sizeof(MinAssignExp), e1, e2)
+{
+}
+Expression *MinAssignExp::semantic(Scope *sc)
+{   Expression *e;
+if (type)
+	return this;
+BinExp::semantic(sc);
+e2 = resolveProperties(sc, e2);
+e = op_overload(sc);
+if (e)
+	return e;
+e1 = e1->modifiableLvalue(sc, NULL);
+e1->checkScalar();
+e1->checkNoBool();
+if (e1->type->ty == Tpointer && e2->type->isintegral())
+	e = scaleFactor(sc);
+else
+{
+	type = e1->type;
+	typeCombine(sc);
+	e1->checkArithmetic();
+	e2->checkArithmetic();
+	if (type->isreal() || type->isimaginary())
+	{
+	    assert(e2->type->isfloating());
+	    e2 = e2->castTo(sc, e1->type);
+	}
+	e = this;
+}
+return e;
+}
+/************************************************************/
+CatAssignExp::CatAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKcatass, sizeof(CatAssignExp), e1, e2)
+{
+}
+Expression *CatAssignExp::semantic(Scope *sc)
+{   Expression *e;
+BinExp::semantic(sc);
+e2 = resolveProperties(sc, e2);
+e = op_overload(sc);
+if (e)
+	return e;
+if (e1->op == TOKslice)
+{	SliceExp *se = (SliceExp *)e1;
+	if (se->e1->type->toBasetype()->ty == Tsarray)
+	    error("cannot append to static array %s", se->e1->type->toChars());
+}
+e1 = e1->modifiableLvalue(sc, NULL);
+Type *tb1 = e1->type->toBasetype();
+Type *tb2 = e2->type->toBasetype();
+if ((tb1->ty == Tarray) &&
+	(tb2->ty == Tarray || tb2->ty == Tsarray) &&
+	e2->implicitConvTo(e1->type)
+	//e1->type->next->equals(e2->type->next)
+)
+{	// Append array
+	e2 = e2->castTo(sc, e1->type);
+	type = e1->type;
+	e = this;
+}
+else if ((tb1->ty == Tarray) &&
+	e2->implicitConvTo(tb1->next)
+)
+{	// Append element
+	e2 = e2->castTo(sc, tb1->next);
+	type = e1->type;
+	e = this;
+}
+else
+{
+	error("cannot append type %s to type %s", tb2->toChars(), tb1->toChars());
+	type = Type::tint32;
+	e = this;
+}
+return e;
+}
+/************************************************************/
+MulAssignExp::MulAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKmulass, sizeof(MulAssignExp), e1, e2)
+{
+}
+Expression *MulAssignExp::semantic(Scope *sc)
+{   Expression *e;
+BinExp::semantic(sc);
+e2 = resolveProperties(sc, e2);
+e = op_overload(sc);
+if (e)
+	return e;
+e1 = e1->modifiableLvalue(sc, NULL);
+e1->checkScalar();
+e1->checkNoBool();
+type = e1->type;
+typeCombine(sc);
+e1->checkArithmetic();
+e2->checkArithmetic();
+if (e2->type->isfloating())
+{	Type *t1;
+	Type *t2;
+	t1 = e1->type;
+	t2 = e2->type;
+	if (t1->isreal())
+	{
+	    if (t2->isimaginary() || t2->iscomplex())
+	    {
+		e2 = e2->castTo(sc, t1);
+	    }
+	}
+	else if (t1->isimaginary())
+	{
+	    if (t2->isimaginary() || t2->iscomplex())
+	    {
+		switch (t1->ty)
+		{
+		    case Timaginary32: t2 = Type::tfloat32; break;
+		    case Timaginary64: t2 = Type::tfloat64; break;
+		    case Timaginary80: t2 = Type::tfloat80; break;
+		    default:
+			assert(0);
+		}
+		e2 = e2->castTo(sc, t2);
+	    }
+	}
+}
+return this;
+}
+/************************************************************/
+DivAssignExp::DivAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKdivass, sizeof(DivAssignExp), e1, e2)
+{
+}
+Expression *DivAssignExp::semantic(Scope *sc)
+{   Expression *e;
+BinExp::semantic(sc);
+e2 = resolveProperties(sc, e2);
+e = op_overload(sc);
+if (e)
+	return e;
+e1 = e1->modifiableLvalue(sc, NULL);
+e1->checkScalar();
+e1->checkNoBool();
+type = e1->type;
+typeCombine(sc);
+e1->checkArithmetic();
+e2->checkArithmetic();
+if (e2->type->isimaginary())
+{	Type *t1;
+	Type *t2;
+	t1 = e1->type;
+	if (t1->isreal())
+	{   // x/iv = i(-x/v)
+	    // Therefore, the result is 0
+	    e2 = new CommaExp(loc, e2, new RealExp(loc, 0, t1));
+	    e2->type = t1;
+	    e = new AssignExp(loc, e1, e2);
+	    e->type = t1;
+	    return e;
+	}
+	else if (t1->isimaginary())
+	{   Expression *e;
+	    switch (t1->ty)
+	    {
+		case Timaginary32: t2 = Type::tfloat32; break;
+		case Timaginary64: t2 = Type::tfloat64; break;
+		case Timaginary80: t2 = Type::tfloat80; break;
+		default:
+		    assert(0);
+	    }
+	    e2 = e2->castTo(sc, t2);
+	    e = new AssignExp(loc, e1, e2);
+	    e->type = t1;
+	    return e;
+	}
+}
+return this;
+}
+/************************************************************/
+ModAssignExp::ModAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKmodass, sizeof(ModAssignExp), e1, e2)
+{
+}
+Expression *ModAssignExp::semantic(Scope *sc)
+{
+return commonSemanticAssign(sc);
+}
+/************************************************************/
+ShlAssignExp::ShlAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKshlass, sizeof(ShlAssignExp), e1, e2)
+{
+}
+Expression *ShlAssignExp::semantic(Scope *sc)
+{   Expression *e;
+//printf("ShlAssignExp::semantic()\n");
+BinExp::semantic(sc);
+e2 = resolveProperties(sc, e2);
+e = op_overload(sc);
+if (e)
+	return e;
+e1 = e1->modifiableLvalue(sc, NULL);
+e1->checkScalar();
+e1->checkNoBool();
+type = e1->type;
+typeCombine(sc);
+e1->checkIntegral();
+e2 = e2->checkIntegral();
+e2 = e2->castTo(sc, Type::tshiftcnt);
+return this;
+}
+/************************************************************/
+ShrAssignExp::ShrAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKshrass, sizeof(ShrAssignExp), e1, e2)
+{
+}
+Expression *ShrAssignExp::semantic(Scope *sc)
+{   Expression *e;
+BinExp::semantic(sc);
+e2 = resolveProperties(sc, e2);
+e = op_overload(sc);
+if (e)
+	return e;
+e1 = e1->modifiableLvalue(sc, NULL);
+e1->checkScalar();
+e1->checkNoBool();
+type = e1->type;
+typeCombine(sc);
+e1->checkIntegral();
+e2 = e2->checkIntegral();
+e2 = e2->castTo(sc, Type::tshiftcnt);
+return this;
+}
+/************************************************************/
+UshrAssignExp::UshrAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKushrass, sizeof(UshrAssignExp), e1, e2)
+{
+}
+Expression *UshrAssignExp::semantic(Scope *sc)
+{   Expression *e;
+BinExp::semantic(sc);
+e2 = resolveProperties(sc, e2);
+e = op_overload(sc);
+if (e)
+	return e;
+e1 = e1->modifiableLvalue(sc, NULL);
+e1->checkScalar();
+e1->checkNoBool();
+type = e1->type;
+typeCombine(sc);
+e1->checkIntegral();
+e2 = e2->checkIntegral();
+e2 = e2->castTo(sc, Type::tshiftcnt);
+return this;
+}
+/************************************************************/
+AndAssignExp::AndAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKandass, sizeof(AndAssignExp), e1, e2)
+{
+}
+Expression *AndAssignExp::semantic(Scope *sc)
+{
+return commonSemanticAssignIntegral(sc);
+}
+/************************************************************/
+OrAssignExp::OrAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKorass, sizeof(OrAssignExp), e1, e2)
+{
+}
+Expression *OrAssignExp::semantic(Scope *sc)
+{
+return commonSemanticAssignIntegral(sc);
+}
+/************************************************************/
+XorAssignExp::XorAssignExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKxorass, sizeof(XorAssignExp), e1, e2)
+{
+}
+Expression *XorAssignExp::semantic(Scope *sc)
+{
+return commonSemanticAssignIntegral(sc);
+}
+/************************* AddExp *****************************/
+AddExp::AddExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKadd, sizeof(AddExp), e1, e2)
+{
+}
+Expression *AddExp::semantic(Scope *sc)
+{   Expression *e;
+#if LOGSEMANTIC
+printf("AddExp::semantic('%s')\n", toChars());
+#endif
+if (!type)
+{
+	BinExp::semanticp(sc);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	Type *tb1 = e1->type->toBasetype();
+	Type *tb2 = e2->type->toBasetype();
+if ((tb1->ty == Tarray || tb1->ty == Tsarray) &&
+(tb2->ty == Tarray || tb2->ty == Tsarray) &&
+tb1->next->equals(tb2->next)
+)
+{
+type = e1->type;
+e = this;
+}
+	else if (tb1->ty == Tpointer && e2->type->isintegral() ||
+	    tb2->ty == Tpointer && e1->type->isintegral())
+	    e = scaleFactor(sc);
+	else if (tb1->ty == Tpointer && tb2->ty == Tpointer)
+	{
+	    incompatibleTypes();
+	    type = e1->type;
+	    e = this;
+	}
+	else
+	{
+	    typeCombine(sc);
+	    if ((e1->type->isreal() && e2->type->isimaginary()) ||
+		(e1->type->isimaginary() && e2->type->isreal()))
+	    {
+		switch (type->toBasetype()->ty)
+		{
+		    case Tfloat32:
+		    case Timaginary32:
+			type = Type::tcomplex32;
+			break;
+		    case Tfloat64:
+		    case Timaginary64:
+			type = Type::tcomplex64;
+			break;
+		    case Tfloat80:
+		    case Timaginary80:
+			type = Type::tcomplex80;
+			break;
+		    default:
+			assert(0);
+		}
+	    }
+	    e = this;
+	}
+	return e;
+}
+return this;
+}
+/************************************************************/
+MinExp::MinExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKmin, sizeof(MinExp), e1, e2)
+{
+}
+Expression *MinExp::semantic(Scope *sc)
+{   Expression *e;
+Type *t1;
+Type *t2;
+#if LOGSEMANTIC
+printf("MinExp::semantic('%s')\n", toChars());
+#endif
+if (type)
+	return this;
+BinExp::semanticp(sc);
+e = op_overload(sc);
+if (e)
+	return e;
+e = this;
+t1 = e1->type->toBasetype();
+t2 = e2->type->toBasetype();
+if (t1->ty == Tpointer)
+{
+	if (t2->ty == Tpointer)
+	{   // Need to divide the result by the stride
+	    // Replace (ptr - ptr) with (ptr - ptr) / stride
+	    d_int64 stride;
+	    Expression *e;
+	    typeCombine(sc);		// make sure pointer types are compatible
+	    type = Type::tptrdiff_t;
+	    stride = t2->next->size();
+	    e = new DivExp(loc, this, new IntegerExp(0, stride, Type::tptrdiff_t));
+	    e->type = Type::tptrdiff_t;
+	    return e;
+	}
+	else if (t2->isintegral())
+	    e = scaleFactor(sc);
+	else
+	{   error("incompatible types for -");
+	    return new IntegerExp(0);
+	}
+}
+else if (t2->ty == Tpointer)
+{
+	type = e2->type;
+	error("can't subtract pointer from %s", e1->type->toChars());
+	return new IntegerExp(0);
+}
+else
+{
+	typeCombine(sc);
+	t1 = e1->type->toBasetype();
+	t2 = e2->type->toBasetype();
+	if ((t1->isreal() && t2->isimaginary()) ||
+	    (t1->isimaginary() && t2->isreal()))
+	{
+	    switch (type->ty)
+	    {
+		case Tfloat32:
+		case Timaginary32:
+		    type = Type::tcomplex32;
+		    break;
+		case Tfloat64:
+		case Timaginary64:
+		    type = Type::tcomplex64;
+		    break;
+		case Tfloat80:
+		case Timaginary80:
+		    type = Type::tcomplex80;
+		    break;
+		default:
+		    assert(0);
+	    }
+	}
+}
+return e;
+}
+/************************* CatExp *****************************/
+CatExp::CatExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKcat, sizeof(CatExp), e1, e2)
+{
+}
+Expression *CatExp::semantic(Scope *sc)
+{   Expression *e;
+//printf("CatExp::semantic() %s\n", toChars());
+if (!type)
+{
+	BinExp::semanticp(sc);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	Type *tb1 = e1->type->toBasetype();
+	Type *tb2 = e2->type->toBasetype();
+	/* BUG: Should handle things like:
+	 *	char c;
+	 *	c ~ ' '
+	 *	' ' ~ c;
+	 */
+#if 0
+	e1->type->print();
+	e2->type->print();
+#endif
+	if ((tb1->ty == Tsarray || tb1->ty == Tarray) &&
+	    e2->type->equals(tb1->next))
+	{
+	    type = tb1->next->arrayOf();
+	    if (tb2->ty == Tarray)
+	    {	// Make e2 into [e2]
+		e2 = new ArrayLiteralExp(e2->loc, e2);
+		e2->type = type;
+	    }
+	    return this;
+	}
+	else if ((tb2->ty == Tsarray || tb2->ty == Tarray) &&
+	    e1->type->equals(tb2->next))
+	{
+	    type = tb2->next->arrayOf();
+	    if (tb1->ty == Tarray)
+	    {	// Make e1 into [e1]
+		e1 = new ArrayLiteralExp(e1->loc, e1);
+		e1->type = type;
+	    }
+	    return this;
+	}
+	typeCombine(sc);
+	if (type->toBasetype()->ty == Tsarray)
+	    type = type->toBasetype()->next->arrayOf();
+#if 0
+	e1->type->print();
+	e2->type->print();
+	type->print();
+	print();
+#endif
+	if (e1->op == TOKstring && e2->op == TOKstring)
+	    e = optimize(WANTvalue);
+	else if (e1->type->equals(e2->type) &&
+		(e1->type->toBasetype()->ty == Tarray ||
+		 e1->type->toBasetype()->ty == Tsarray))
+	{
+	    e = this;
+	}
+	else
+	{
+	    error("Can only concatenate arrays, not (%s ~ %s)",
+		e1->type->toChars(), e2->type->toChars());
+	    type = Type::tint32;
+	    e = this;
+	}
+	e->type = e->type->semantic(loc, sc);
+	return e;
+}
+return this;
+}
+/************************************************************/
+MulExp::MulExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKmul, sizeof(MulExp), e1, e2)
+{
+}
+Expression *MulExp::semantic(Scope *sc)
+{   Expression *e;
+#if 0
+printf("MulExp::semantic() %s\n", toChars());
+#endif
+if (type)
+{
+	return this;
+}
+BinExp::semanticp(sc);
+e = op_overload(sc);
+if (e)
+	return e;
+typeCombine(sc);
+e1->checkArithmetic();
+e2->checkArithmetic();
+if (type->isfloating())
+{	Type *t1 = e1->type;
+	Type *t2 = e2->type;
+	if (t1->isreal())
+	{
+	    type = t2;
+	}
+	else if (t2->isreal())
+	{
+	    type = t1;
+	}
+	else if (t1->isimaginary())
+	{
+	    if (t2->isimaginary())
+	    {	Expression *e;
+		switch (t1->ty)
+		{
+		    case Timaginary32:	type = Type::tfloat32;	break;
+		    case Timaginary64:	type = Type::tfloat64;	break;
+		    case Timaginary80:	type = Type::tfloat80;	break;
+		    default:		assert(0);
+		}
+		// iy * iv = -yv
+		e1->type = type;
+		e2->type = type;
+		e = new NegExp(loc, this);
+		e = e->semantic(sc);
+		return e;
+	    }
+	    else
+		type = t2;	// t2 is complex
+	}
+	else if (t2->isimaginary())
+	{
+	    type = t1;	// t1 is complex
+	}
+}
+return this;
+}
+/************************************************************/
+DivExp::DivExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKdiv, sizeof(DivExp), e1, e2)
+{
+}
+Expression *DivExp::semantic(Scope *sc)
+{   Expression *e;
+if (type)
+	return this;
+BinExp::semanticp(sc);
+e = op_overload(sc);
+if (e)
+	return e;
+typeCombine(sc);
+e1->checkArithmetic();
+e2->checkArithmetic();
+if (type->isfloating())
+{	Type *t1 = e1->type;
+	Type *t2 = e2->type;
+	if (t1->isreal())
+	{
+	    type = t2;
+	    if (t2->isimaginary())
+	    {	Expression *e;
+		// x/iv = i(-x/v)
+		e2->type = t1;
+		e = new NegExp(loc, this);
+		e = e->semantic(sc);
+		return e;
+	    }
+	}
+	else if (t2->isreal())
+	{
+	    type = t1;
+	}
+	else if (t1->isimaginary())
+	{
+	    if (t2->isimaginary())
+	    {
+		switch (t1->ty)
+		{
+		    case Timaginary32:	type = Type::tfloat32;	break;
+		    case Timaginary64:	type = Type::tfloat64;	break;
+		    case Timaginary80:	type = Type::tfloat80;	break;
+		    default:		assert(0);
+		}
+	    }
+	    else
+		type = t2;	// t2 is complex
+	}
+	else if (t2->isimaginary())
+	{
+	    type = t1;	// t1 is complex
+	}
+}
+return this;
+}
+/************************************************************/
+ModExp::ModExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKmod, sizeof(ModExp), e1, e2)
+{
+}
+Expression *ModExp::semantic(Scope *sc)
+{   Expression *e;
+if (type)
+	return this;
+BinExp::semanticp(sc);
+e = op_overload(sc);
+if (e)
+	return e;
+typeCombine(sc);
+e1->checkArithmetic();
+e2->checkArithmetic();
+if (type->isfloating())
+{	type = e1->type;
+	if (e2->type->iscomplex())
+	{   error("cannot perform modulo complex arithmetic");
+	    return new IntegerExp(0);
+	}
+}
+return this;
+}
+/************************************************************/
+ShlExp::ShlExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKshl, sizeof(ShlExp), e1, e2)
+{
+}
+Expression *ShlExp::semantic(Scope *sc)
+{   Expression *e;
+//printf("ShlExp::semantic(), type = %p\n", type);
+if (!type)
+{	BinExp::semanticp(sc);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	e1 = e1->checkIntegral();
+	e2 = e2->checkIntegral();
+	e1 = e1->integralPromotions(sc);
+	e2 = e2->castTo(sc, Type::tshiftcnt);
+	type = e1->type;
+}
+return this;
+}
+/************************************************************/
+ShrExp::ShrExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKshr, sizeof(ShrExp), e1, e2)
+{
+}
+Expression *ShrExp::semantic(Scope *sc)
+{   Expression *e;
+if (!type)
+{	BinExp::semanticp(sc);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	e1 = e1->checkIntegral();
+	e2 = e2->checkIntegral();
+	e1 = e1->integralPromotions(sc);
+	e2 = e2->castTo(sc, Type::tshiftcnt);
+	type = e1->type;
+}
+return this;
+}
+/************************************************************/
+UshrExp::UshrExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKushr, sizeof(UshrExp), e1, e2)
+{
+}
+Expression *UshrExp::semantic(Scope *sc)
+{   Expression *e;
+if (!type)
+{	BinExp::semanticp(sc);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	e1 = e1->checkIntegral();
+	e2 = e2->checkIntegral();
+	e1 = e1->integralPromotions(sc);
+	e2 = e2->castTo(sc, Type::tshiftcnt);
+	type = e1->type;
+}
+return this;
+}
+/************************************************************/
+AndExp::AndExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKand, sizeof(AndExp), e1, e2)
+{
+}
+Expression *AndExp::semantic(Scope *sc)
+{   Expression *e;
+if (!type)
+{	BinExp::semanticp(sc);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	if (e1->type->toBasetype()->ty == Tbool &&
+	    e2->type->toBasetype()->ty == Tbool)
+	{
+	    type = e1->type;
+	    e = this;
+	}
+	else
+	{
+	    typeCombine(sc);
+	    e1->checkIntegral();
+	    e2->checkIntegral();
+	}
+}
+return this;
+}
+/************************************************************/
+OrExp::OrExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKor, sizeof(OrExp), e1, e2)
+{
+}
+Expression *OrExp::semantic(Scope *sc)
+{   Expression *e;
+if (!type)
+{	BinExp::semanticp(sc);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	if (e1->type->toBasetype()->ty == Tbool &&
+	    e2->type->toBasetype()->ty == Tbool)
+	{
+	    type = e1->type;
+	    e = this;
+	}
+	else
+	{
+	    typeCombine(sc);
+	    e1->checkIntegral();
+	    e2->checkIntegral();
+	}
+}
+return this;
+}
+/************************************************************/
+XorExp::XorExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKxor, sizeof(XorExp), e1, e2)
+{
+}
+Expression *XorExp::semantic(Scope *sc)
+{   Expression *e;
+if (!type)
+{	BinExp::semanticp(sc);
+	e = op_overload(sc);
+	if (e)
+	    return e;
+	if (e1->type->toBasetype()->ty == Tbool &&
+	    e2->type->toBasetype()->ty == Tbool)
+	{
+	    type = e1->type;
+	    e = this;
+	}
+	else
+	{
+	    typeCombine(sc);
+	    e1->checkIntegral();
+	    e2->checkIntegral();
+	}
+}
+return this;
+}
+/************************************************************/
+OrOrExp::OrOrExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKoror, sizeof(OrOrExp), e1, e2)
+{
+}
+Expression *OrOrExp::semantic(Scope *sc)
+{
+unsigned cs1;
+// same as for AndAnd
+e1 = e1->semantic(sc);
+e1 = resolveProperties(sc, e1);
+e1 = e1->checkToPointer();
+e1 = e1->checkToBoolean();
+cs1 = sc->callSuper;
+if (sc->flags & SCOPEstaticif)
+{
+	/* If in static if, don't evaluate e2 if we don't have to.
+	 */
+	e1 = e1->optimize(WANTflags);
+	if (e1->isBool(TRUE))
+	{
+	    return new IntegerExp(loc, 1, Type::tboolean);
+	}
+}
+e2 = e2->semantic(sc);
+sc->mergeCallSuper(loc, cs1);
+e2 = resolveProperties(sc, e2);
+e2 = e2->checkToPointer();
+type = Type::tboolean;
+if (e1->type->ty == Tvoid)
+	type = Type::tvoid;
+if (e2->op == TOKtype || e2->op == TOKimport)
+	error("%s is not an expression", e2->toChars());
+return this;
+}
+Expression *OrOrExp::checkToBoolean()
+{
+e2 = e2->checkToBoolean();
+return this;
+}
+int OrOrExp::isBit()
+{
+return TRUE;
+}
+int OrOrExp::checkSideEffect(int flag)
+{
+if (flag == 2)
+{
+	return e1->checkSideEffect(2) || e2->checkSideEffect(2);
+}
+else
+{	e1->checkSideEffect(1);
+	return e2->checkSideEffect(flag);
+}
+}
+/************************************************************/
+AndAndExp::AndAndExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKandand, sizeof(AndAndExp), e1, e2)
+{
+}
+Expression *AndAndExp::semantic(Scope *sc)
+{
+unsigned cs1;
+// same as for OrOr
+e1 = e1->semantic(sc);
+e1 = resolveProperties(sc, e1);
+e1 = e1->checkToPointer();
+e1 = e1->checkToBoolean();
+cs1 = sc->callSuper;
+if (sc->flags & SCOPEstaticif)
+{
+	/* If in static if, don't evaluate e2 if we don't have to.
+	 */
+	e1 = e1->optimize(WANTflags);
+	if (e1->isBool(FALSE))
+	{
+	    return new IntegerExp(loc, 0, Type::tboolean);
+	}
+}
+e2 = e2->semantic(sc);
+sc->mergeCallSuper(loc, cs1);
+e2 = resolveProperties(sc, e2);
+e2 = e2->checkToPointer();
+type = Type::tboolean;
+if (e1->type->ty == Tvoid)
+	type = Type::tvoid;
+if (e2->op == TOKtype || e2->op == TOKimport)
+	error("%s is not an expression", e2->toChars());
+return this;
+}
+Expression *AndAndExp::checkToBoolean()
+{
+e2 = e2->checkToBoolean();
+return this;
+}
+int AndAndExp::isBit()
+{
+return TRUE;
+}
+int AndAndExp::checkSideEffect(int flag)
+{
+if (flag == 2)
+{
+	return e1->checkSideEffect(2) || e2->checkSideEffect(2);
+}
+else
+{
+	e1->checkSideEffect(1);
+	return e2->checkSideEffect(flag);
+}
+}
+/************************************************************/
+InExp::InExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKin, sizeof(InExp), e1, e2)
+{
+}
+Expression *InExp::semantic(Scope *sc)
+{   Expression *e;
+if (type)
+	return this;
+BinExp::semanticp(sc);
+e = op_overload(sc);
+if (e)
+	return e;
+//type = Type::tboolean;
+Type *t2b = e2->type->toBasetype();
+if (t2b->ty != Taarray)
+{
+	error("rvalue of in expression must be an associative array, not %s", e2->type->toChars());
+	type = Type::terror;
+}
+else
+{
+	TypeAArray *ta = (TypeAArray *)t2b;
+	// Convert key to type of key
+	e1 = e1->implicitCastTo(sc, ta->index);
+	// Return type is pointer to value
+	type = ta->next->pointerTo();
+}
+return this;
+}
+int InExp::isBit()
+{
+return FALSE;
+}
+/************************************************************/
+/* This deletes the key e1 from the associative array e2
+*/
+RemoveExp::RemoveExp(Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKremove, sizeof(RemoveExp), e1, e2)
+{
+type = Type::tvoid;
+}
+/************************************************************/
+CmpExp::CmpExp(enum TOK op, Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, op, sizeof(CmpExp), e1, e2)
+{
+}
+Expression *CmpExp::semantic(Scope *sc)
+{   Expression *e;
+Type *t1;
+Type *t2;
+#if LOGSEMANTIC
+printf("CmpExp::semantic('%s')\n", toChars());
+#endif
+if (type)
+	return this;
+BinExp::semanticp(sc);
+e = op_overload(sc);
+if (e)
+{
+	e = new CmpExp(op, loc, e, new IntegerExp(loc, 0, Type::tint32));
+	e = e->semantic(sc);
+	return e;
+}
+typeCombine(sc);
+type = Type::tboolean;
+// Special handling for array comparisons
+t1 = e1->type->toBasetype();
+t2 = e2->type->toBasetype();
+if ((t1->ty == Tarray || t1->ty == Tsarray) &&
+	(t2->ty == Tarray || t2->ty == Tsarray))
+{
+	if (!t1->next->equals(t2->next))
+	    error("array comparison type mismatch, %s vs %s", t1->next->toChars(), t2->next->toChars());
+	e = this;
+}
+else if (t1->ty == Tstruct || t2->ty == Tstruct ||
+	     (t1->ty == Tclass && t2->ty == Tclass))
+{
+	if (t2->ty == Tstruct)
+	    error("need member function opCmp() for %s %s to compare", t2->toDsymbol(sc)->kind(), t2->toChars());
+	else
+	    error("need member function opCmp() for %s %s to compare", t1->toDsymbol(sc)->kind(), t1->toChars());
+	e = this;
+}
+#if 1
+else if (t1->iscomplex() || t2->iscomplex())
+{
+	error("compare not defined for complex operands");
+	e = new IntegerExp(0);
+}
+#endif
+else
+	e = this;
+return e;
+}
+int CmpExp::isBit()
+{
+return TRUE;
+}
+/************************************************************/
+EqualExp::EqualExp(enum TOK op, Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, op, sizeof(EqualExp), e1, e2)
+{
+}
+Expression *EqualExp::semantic(Scope *sc)
+{   Expression *e;
+Type *t1;
+Type *t2;
+//printf("EqualExp::semantic('%s')\n", toChars());
+if (type)
+	return this;
+BinExp::semanticp(sc);
+/* Before checking for operator overloading, check to see if we're
+* comparing the addresses of two statics. If so, we can just see
+* if they are the same symbol.
+*/
+if (e1->op == TOKaddress && e2->op == TOKaddress)
+{	AddrExp *ae1 = (AddrExp *)e1;
+	AddrExp *ae2 = (AddrExp *)e2;
+	if (ae1->e1->op == TOKvar && ae2->e1->op == TOKvar)
+	{   VarExp *ve1 = (VarExp *)ae1->e1;
+	    VarExp *ve2 = (VarExp *)ae2->e1;
+	    if (ve1->var == ve2->var /*|| ve1->var->toSymbol() == ve2->var->toSymbol()*/)
+	    {
+		// They are the same, result is 'true' for ==, 'false' for !=
+		e = new IntegerExp(loc, (op == TOKequal), Type::tboolean);
+		return e;
+	    }
+	}
+}
+//if (e2->op != TOKnull)
+{
+	e = op_overload(sc);
+	if (e)
+	{
+	    if (op == TOKnotequal)
+	    {
+		e = new NotExp(e->loc, e);
+		e = e->semantic(sc);
+	    }
+	    return e;
+	}
+}
+e = typeCombine(sc);
+type = Type::tboolean;
+// Special handling for array comparisons
+t1 = e1->type->toBasetype();
+t2 = e2->type->toBasetype();
+if ((t1->ty == Tarray || t1->ty == Tsarray) &&
+	(t2->ty == Tarray || t2->ty == Tsarray))
+{
+	if (!t1->next->equals(t2->next))
+	    error("array comparison type mismatch, %s vs %s", t1->next->toChars(), t2->next->toChars());
+}
+else
+{
+	if (e1->type != e2->type && e1->type->isfloating() && e2->type->isfloating())
+	{
+	    // Cast both to complex
+	    e1 = e1->castTo(sc, Type::tcomplex80);
+	    e2 = e2->castTo(sc, Type::tcomplex80);
+	}
+}
+return e;
+}
+int EqualExp::isBit()
+{
+return TRUE;
+}
+/************************************************************/
+IdentityExp::IdentityExp(enum TOK op, Loc loc, Expression *e1, Expression *e2)
+	: BinExp(loc, op, sizeof(IdentityExp), e1, e2)
+{
+}
+Expression *IdentityExp::semantic(Scope *sc)
+{
+if (type)
+	return this;
+BinExp::semanticp(sc);
+type = Type::tboolean;
+typeCombine(sc);
+if (e1->type != e2->type && e1->type->isfloating() && e2->type->isfloating())
+{
+	// Cast both to complex
+	e1 = e1->castTo(sc, Type::tcomplex80);
+	e2 = e2->castTo(sc, Type::tcomplex80);
+}
+return this;
+}
+int IdentityExp::isBit()
+{
+return TRUE;
+}
+/****************************************************************/
+CondExp::CondExp(Loc loc, Expression *econd, Expression *e1, Expression *e2)
+	: BinExp(loc, TOKquestion, sizeof(CondExp), e1, e2)
+{
+this->econd = econd;
+}
+Expression *CondExp::syntaxCopy()
+{
+return new CondExp(loc, econd->syntaxCopy(), e1->syntaxCopy(), e2->syntaxCopy());
+}
+Expression *CondExp::semantic(Scope *sc)
+{   Type *t1;
+Type *t2;
+unsigned cs0;
+unsigned cs1;
+#if LOGSEMANTIC
+printf("CondExp::semantic('%s')\n", toChars());
+#endif
+if (type)
+	return this;
+econd = econd->semantic(sc);
+econd = resolveProperties(sc, econd);
+econd = econd->checkToPointer();
+econd = econd->checkToBoolean();
+#if 0	/* this cannot work right because the types of e1 and e2
+	 * both contribute to the type of the result.
+	 */
+if (sc->flags & SCOPEstaticif)
+{
+	/* If in static if, don't evaluate what we don't have to.
+	 */
+	econd = econd->optimize(WANTflags);
+	if (econd->isBool(TRUE))
+	{
+	    e1 = e1->semantic(sc);
+	    e1 = resolveProperties(sc, e1);
+	    return e1;
+	}
+	else if (econd->isBool(FALSE))
+	{
+	    e2 = e2->semantic(sc);
+	    e2 = resolveProperties(sc, e2);
+	    return e2;
+	}
+}
+#endif
+cs0 = sc->callSuper;
+e1 = e1->semantic(sc);
+e1 = resolveProperties(sc, e1);
+cs1 = sc->callSuper;
+sc->callSuper = cs0;
+e2 = e2->semantic(sc);
+e2 = resolveProperties(sc, e2);
+sc->mergeCallSuper(loc, cs1);
+// If either operand is void, the result is void
+t1 = e1->type;
+t2 = e2->type;
+if (t1->ty == Tvoid || t2->ty == Tvoid)
+	type = Type::tvoid;
+else if (t1 == t2)
+	type = t1;
+else
+{
+	typeCombine(sc);
+	switch (e1->type->toBasetype()->ty)
+	{
+	    case Tcomplex32:
+	    case Tcomplex64:
+	    case Tcomplex80:
+		e2 = e2->castTo(sc, e1->type);
+		break;
+	}
+	switch (e2->type->toBasetype()->ty)
+	{
+	    case Tcomplex32:
+	    case Tcomplex64:
+	    case Tcomplex80:
+		e1 = e1->castTo(sc, e2->type);
+		break;
+	}
+}
+return this;
+}
+Expression *CondExp::toLvalue(Scope *sc, Expression *ex)
+{
+PtrExp *e;
+// convert (econd ? e1 : e2) to *(econd ? &e1 : &e2)
+e = new PtrExp(loc, this, type);
+e1 = e1->addressOf(sc);
+//e1 = e1->toLvalue(sc, NULL);
+e2 = e2->addressOf(sc);
+//e2 = e2->toLvalue(sc, NULL);
+typeCombine(sc);
+type = e2->type;
+return e;
+}
+Expression *CondExp::modifiableLvalue(Scope *sc, Expression *e)
+{
+error("conditional expression %s is not a modifiable lvalue", toChars());
+return this;
+}
+void CondExp::checkEscape()
+{
+e1->checkEscape();
+e2->checkEscape();
+}
+Expression *CondExp::checkToBoolean()
+{
+e1 = e1->checkToBoolean();
+e2 = e2->checkToBoolean();
+return this;
+}
+int CondExp::checkSideEffect(int flag)
+{
+if (flag == 2)
+{
+	return econd->checkSideEffect(2) ||
+		e1->checkSideEffect(2) ||
+		e2->checkSideEffect(2);
+}
+else
+{
+	econd->checkSideEffect(1);
+	e1->checkSideEffect(flag);
+	return e2->checkSideEffect(flag);
+}
+}
+void CondExp::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+expToCBuffer(buf, hgs, econd, PREC_oror);
+buf->writestring(" ? ");
+expToCBuffer(buf, hgs, e1, PREC_expr);
+buf->writestring(" : ");
+expToCBuffer(buf, hgs, e2, PREC_cond);
+}

Mercurial > projects > ldc

comparison dmd/expression.c @ 1:c53b6e3fe49a trunk