projects/ldc: dmd/statement.c comparison

comparison dmd/statement.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 <assert.h>
+#include "mem.h"
+#include "statement.h"
+#include "expression.h"
+#include "cond.h"
+#include "init.h"
+#include "staticassert.h"
+#include "mtype.h"
+#include "scope.h"
+#include "declaration.h"
+#include "aggregate.h"
+#include "id.h"
+#include "hdrgen.h"
+#include "parse.h"
+/******************************** Statement ***************************/
+Statement::Statement(Loc loc)
+: loc(loc)
+{
+#ifdef _DH
+// If this is an in{} contract scope statement (skip for determining
+//  inlineStatus of a function body for header content)
+incontract = 0;
+#endif
+}
+Statement *Statement::syntaxCopy()
+{
+assert(0);
+return NULL;
+}
+void Statement::print()
+{
+fprintf(stdmsg, "%s\n", toChars());
+fflush(stdmsg);
+}
+char *Statement::toChars()
+{   OutBuffer *buf;
+HdrGenState hgs;
+buf = new OutBuffer();
+toCBuffer(buf, &hgs);
+return buf->toChars();
+}
+void Statement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->printf("Statement::toCBuffer()");
+buf->writenl();
+}
+Statement *Statement::semantic(Scope *sc)
+{
+return this;
+}
+// Same as semantic(), but do create a new scope
+Statement *Statement::semanticScope(Scope *sc, Statement *sbreak, Statement *scontinue)
+{   Scope *scd;
+Statement *s;
+scd = sc->push();
+if (sbreak)
+	scd->sbreak = sbreak;
+if (scontinue)
+	scd->scontinue = scontinue;
+s = semantic(scd);
+scd->pop();
+return s;
+}
+void Statement::error(const char *format, ...)
+{
+va_list ap;
+va_start(ap, format);
+::verror(loc, format, ap);
+va_end( ap );
+}
+int Statement::hasBreak()
+{
+//printf("Statement::hasBreak()\n");
+return FALSE;
+}
+int Statement::hasContinue()
+{
+return FALSE;
+}
+// TRUE if statement uses exception handling
+int Statement::usesEH()
+{
+return FALSE;
+}
+// TRUE if statement may fall off the end without a throw or return
+int Statement::fallOffEnd()
+{
+return TRUE;
+}
+// TRUE if statement 'comes from' somewhere else, like a goto
+int Statement::comeFrom()
+{
+//printf("Statement::comeFrom()\n");
+return FALSE;
+}
+/****************************************
+* If this statement has code that needs to run in a finally clause
+* at the end of the current scope, return that code in the form of
+* a Statement.
+* Output:
+*	*sentry		code executed upon entry to the scope
+*	*sexception	code executed upon exit from the scope via exception
+*	*sfinally	code executed in finally block
+*/
+void Statement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally)
+{
+//printf("Statement::scopeCode()\n");
+//print();
+*sentry = NULL;
+*sexception = NULL;
+*sfinally = NULL;
+}
+/*********************************
+* Flatten out the scope by presenting the statement
+* as an array of statements.
+* Returns NULL if no flattening necessary.
+*/
+Statements *Statement::flatten(Scope *sc)
+{
+return NULL;
+}
+/******************************** ExpStatement ***************************/
+ExpStatement::ExpStatement(Loc loc, Expression *exp)
+: Statement(loc)
+{
+this->exp = exp;
+}
+Statement *ExpStatement::syntaxCopy()
+{
+Expression *e = exp ? exp->syntaxCopy() : NULL;
+ExpStatement *es = new ExpStatement(loc, e);
+return es;
+}
+void ExpStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+if (exp)
+	exp->toCBuffer(buf, hgs);
+buf->writeByte(';');
+if (!hgs->FLinit.init)
+buf->writenl();
+}
+Statement *ExpStatement::semantic(Scope *sc)
+{
+if (exp)
+{
+	//printf("ExpStatement::semantic() %s\n", exp->toChars());
+	exp = exp->semantic(sc);
+	exp = resolveProperties(sc, exp);
+	exp->checkSideEffect(0);
+	exp = exp->optimize(0);
+	//exp = exp->optimize(isDeclarationStatement() ? WANTvalue : 0);
+}
+return this;
+}
+int ExpStatement::fallOffEnd()
+{
+if (exp)
+{
+	if (exp->op == TOKassert)
+	{   AssertExp *a = (AssertExp *)exp;
+	    if (a->e1->isBool(FALSE))	// if it's an assert(0)
+		return FALSE;
+	}
+	else if (exp->op == TOKhalt)
+	    return FALSE;
+}
+return TRUE;
+}
+/******************************** CompileStatement ***************************/
+CompileStatement::CompileStatement(Loc loc, Expression *exp)
+: Statement(loc)
+{
+this->exp = exp;
+}
+Statement *CompileStatement::syntaxCopy()
+{
+Expression *e = exp->syntaxCopy();
+CompileStatement *es = new CompileStatement(loc, e);
+return es;
+}
+void CompileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("mixin(");
+exp->toCBuffer(buf, hgs);
+buf->writestring(");");
+if (!hgs->FLinit.init)
+buf->writenl();
+}
+Statement *CompileStatement::semantic(Scope *sc)
+{
+//printf("CompileStatement::semantic() %s\n", exp->toChars());
+exp = exp->semantic(sc);
+exp = resolveProperties(sc, exp);
+exp = exp->optimize(WANTvalue | WANTinterpret);
+if (exp->op != TOKstring)
+{	error("argument to mixin must be a string, not (%s)", exp->toChars());
+	return this;
+}
+StringExp *se = (StringExp *)exp;
+se = se->toUTF8(sc);
+Parser p(sc->module, (unsigned char *)se->string, se->len, 0);
+p.loc = loc;
+p.nextToken();
+Statements *statements = new Statements();
+while (p.token.value != TOKeof)
+{
+	Statement *s = p.parseStatement(PSsemi | PScurlyscope);
+	statements->push(s);
+}
+Statement *s = new CompoundStatement(loc, statements);
+return s->semantic(sc);
+}
+/******************************** DeclarationStatement ***************************/
+DeclarationStatement::DeclarationStatement(Loc loc, Dsymbol *declaration)
+: ExpStatement(loc, new DeclarationExp(loc, declaration))
+{
+}
+DeclarationStatement::DeclarationStatement(Loc loc, Expression *exp)
+: ExpStatement(loc, exp)
+{
+}
+Statement *DeclarationStatement::syntaxCopy()
+{
+DeclarationStatement *ds = new DeclarationStatement(loc, exp->syntaxCopy());
+return ds;
+}
+void DeclarationStatement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally)
+{
+//printf("DeclarationStatement::scopeCode()\n");
+//print();
+*sentry = NULL;
+*sexception = NULL;
+*sfinally = NULL;
+if (exp)
+{
+	if (exp->op == TOKdeclaration)
+	{
+	    DeclarationExp *de = (DeclarationExp *)(exp);
+	    VarDeclaration *v = de->declaration->isVarDeclaration();
+	    if (v)
+	    {	Expression *e;
+		e = v->callAutoDtor();
+		if (e)
+		{
+		    //printf("dtor is: "); e->print();
+		    *sfinally = new ExpStatement(loc, e);
+		}
+	    }
+	}
+}
+}
+void DeclarationStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+exp->toCBuffer(buf, hgs);
+}
+/******************************** CompoundStatement ***************************/
+CompoundStatement::CompoundStatement(Loc loc, Statements *s)
+: Statement(loc)
+{
+statements = s;
+}
+CompoundStatement::CompoundStatement(Loc loc, Statement *s1, Statement *s2)
+: Statement(loc)
+{
+statements = new Statements();
+statements->reserve(2);
+statements->push(s1);
+statements->push(s2);
+}
+Statement *CompoundStatement::syntaxCopy()
+{
+Statements *a = new Statements();
+a->setDim(statements->dim);
+for (size_t i = 0; i < statements->dim; i++)
+{	Statement *s = (Statement *)statements->data[i];
+	if (s)
+	    s = s->syntaxCopy();
+	a->data[i] = s;
+}
+CompoundStatement *cs = new CompoundStatement(loc, a);
+return cs;
+}
+Statement *CompoundStatement::semantic(Scope *sc)
+{   Statement *s;
+//printf("CompoundStatement::semantic(this = %p, sc = %p)\n", this, sc);
+for (size_t i = 0; i < statements->dim; )
+{
+	s = (Statement *) statements->data[i];
+	if (s)
+	{   Statements *a = s->flatten(sc);
+	    if (a)
+	    {
+		statements->remove(i);
+		statements->insert(i, a);
+		continue;
+	    }
+	    s = s->semantic(sc);
+	    statements->data[i] = s;
+	    if (s)
+	    {
+		Statement *sentry;
+		Statement *sexception;
+		Statement *sfinally;
+		s->scopeCode(&sentry, &sexception, &sfinally);
+		if (sentry)
+		{
+		    sentry = sentry->semantic(sc);
+		    statements->data[i] = sentry;
+		}
+		if (sexception)
+		{
+		    if (i + 1 == statements->dim && !sfinally)
+		    {
+#if 1
+			sexception = sexception->semantic(sc);
+#else
+			statements->push(sexception);
+			if (sfinally)
+			    // Assume sexception does not throw
+			    statements->push(sfinally);
+#endif
+		    }
+		    else
+		    {
+			/* Rewrite:
+			 *	s; s1; s2;
+			 * As:
+			 *	s;
+			 *	try { s1; s2; }
+			 *	catch (Object __o)
+			 *	{ sexception; throw __o; }
+			 */
+			Statement *body;
+			Statements *a = new Statements();
+			for (int j = i + 1; j < statements->dim; j++)
+			{
+			    a->push(statements->data[j]);
+			}
+			body = new CompoundStatement(0, a);
+			body = new ScopeStatement(0, body);
+			static int num;
+			char name[3 + sizeof(num) * 3 + 1];
+			sprintf(name, "__o%d", ++num);
+			Identifier *id = Lexer::idPool(name);
+			Statement *handler = new ThrowStatement(0, new IdentifierExp(0, id));
+			handler = new CompoundStatement(0, sexception, handler);
+			Array *catches = new Array();
+			Catch *ctch = new Catch(0, NULL, id, handler);
+			catches->push(ctch);
+			s = new TryCatchStatement(0, body, catches);
+			if (sfinally)
+			    s = new TryFinallyStatement(0, s, sfinally);
+			s = s->semantic(sc);
+			statements->setDim(i + 1);
+			statements->push(s);
+			break;
+		    }
+		}
+		else if (sfinally)
+		{
+		    if (0 && i + 1 == statements->dim)
+		    {
+			statements->push(sfinally);
+		    }
+		    else
+		    {
+			/* Rewrite:
+			 *	s; s1; s2;
+			 * As:
+			 *	s; try { s1; s2; } finally { sfinally; }
+			 */
+			Statement *body;
+			Statements *a = new Statements();
+			for (int j = i + 1; j < statements->dim; j++)
+			{
+			    a->push(statements->data[j]);
+			}
+			body = new CompoundStatement(0, a);
+			s = new TryFinallyStatement(0, body, sfinally);
+			s = s->semantic(sc);
+			statements->setDim(i + 1);
+			statements->push(s);
+			break;
+		    }
+		}
+	    }
+	}
+	i++;
+}
+if (statements->dim == 1)
+	return s;
+return this;
+}
+Statements *CompoundStatement::flatten(Scope *sc)
+{
+return statements;
+}
+ReturnStatement *CompoundStatement::isReturnStatement()
+{   int i;
+ReturnStatement *rs = NULL;
+for (i = 0; i < statements->dim; i++)
+{	Statement *s;
+	s = (Statement *) statements->data[i];
+	if (s)
+	{
+	    rs = s->isReturnStatement();
+	    if (rs)
+		break;
+	}
+}
+return rs;
+}
+void CompoundStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{   int i;
+for (i = 0; i < statements->dim; i++)
+{	Statement *s;
+	s = (Statement *) statements->data[i];
+	if (s)
+	    s->toCBuffer(buf, hgs);
+}
+}
+int CompoundStatement::usesEH()
+{
+for (int i = 0; i < statements->dim; i++)
+{	Statement *s;
+	s = (Statement *) statements->data[i];
+	if (s && s->usesEH())
+	    return TRUE;
+}
+return FALSE;
+}
+int CompoundStatement::fallOffEnd()
+{   int falloff = TRUE;
+//printf("CompoundStatement::fallOffEnd()\n");
+for (int i = 0; i < statements->dim; i++)
+{	Statement *s = (Statement *)statements->data[i];
+	if (!s)
+	    continue;
+	if (!falloff && global.params.warnings && !s->comeFrom())
+	{
+	    fprintf(stdmsg, "warning - ");
+	    s->error("statement is not reachable");
+	}
+	falloff = s->fallOffEnd();
+}
+return falloff;
+}
+int CompoundStatement::comeFrom()
+{   int comefrom = FALSE;
+//printf("CompoundStatement::comeFrom()\n");
+for (int i = 0; i < statements->dim; i++)
+{	Statement *s = (Statement *)statements->data[i];
+	if (!s)
+	    continue;
+	comefrom |= s->comeFrom();
+}
+return comefrom;
+}
+/**************************** UnrolledLoopStatement ***************************/
+UnrolledLoopStatement::UnrolledLoopStatement(Loc loc, Statements *s)
+: Statement(loc)
+{
+statements = s;
+}
+Statement *UnrolledLoopStatement::syntaxCopy()
+{
+Statements *a = new Statements();
+a->setDim(statements->dim);
+for (size_t i = 0; i < statements->dim; i++)
+{	Statement *s = (Statement *)statements->data[i];
+	if (s)
+	    s = s->syntaxCopy();
+	a->data[i] = s;
+}
+UnrolledLoopStatement *cs = new UnrolledLoopStatement(loc, a);
+return cs;
+}
+Statement *UnrolledLoopStatement::semantic(Scope *sc)
+{
+//printf("UnrolledLoopStatement::semantic(this = %p, sc = %p)\n", this, sc);
+sc->noctor++;
+Scope *scd = sc->push();
+scd->sbreak = this;
+scd->scontinue = this;
+for (size_t i = 0; i < statements->dim; i++)
+{
+	Statement *s = (Statement *) statements->data[i];
+	if (s)
+	{
+	    s = s->semantic(scd);
+	    statements->data[i] = s;
+	}
+}
+scd->pop();
+sc->noctor--;
+return this;
+}
+void UnrolledLoopStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("unrolled {");
+buf->writenl();
+for (size_t i = 0; i < statements->dim; i++)
+{	Statement *s;
+	s = (Statement *) statements->data[i];
+	if (s)
+	    s->toCBuffer(buf, hgs);
+}
+buf->writeByte('}');
+buf->writenl();
+}
+int UnrolledLoopStatement::hasBreak()
+{
+return TRUE;
+}
+int UnrolledLoopStatement::hasContinue()
+{
+return TRUE;
+}
+int UnrolledLoopStatement::usesEH()
+{
+for (size_t i = 0; i < statements->dim; i++)
+{	Statement *s;
+	s = (Statement *) statements->data[i];
+	if (s && s->usesEH())
+	    return TRUE;
+}
+return FALSE;
+}
+int UnrolledLoopStatement::fallOffEnd()
+{   int falloff = TRUE;
+//printf("UnrolledLoopStatement::fallOffEnd()\n");
+for (size_t i = 0; i < statements->dim; i++)
+{	Statement *s = (Statement *)statements->data[i];
+	if (!s)
+	    continue;
+	if (!falloff && global.params.warnings && !s->comeFrom())
+	{
+	    fprintf(stdmsg, "warning - ");
+	    s->error("statement is not reachable");
+	}
+	falloff = s->fallOffEnd();
+}
+return falloff;
+}
+int UnrolledLoopStatement::comeFrom()
+{   int comefrom = FALSE;
+//printf("UnrolledLoopStatement::comeFrom()\n");
+for (size_t i = 0; i < statements->dim; i++)
+{	Statement *s = (Statement *)statements->data[i];
+	if (!s)
+	    continue;
+	comefrom |= s->comeFrom();
+}
+return comefrom;
+}
+/******************************** ScopeStatement ***************************/
+ScopeStatement::ScopeStatement(Loc loc, Statement *s)
+: Statement(loc)
+{
+this->statement = s;
+}
+Statement *ScopeStatement::syntaxCopy()
+{
+Statement *s;
+s = statement ? statement->syntaxCopy() : NULL;
+s = new ScopeStatement(loc, s);
+return s;
+}
+Statement *ScopeStatement::semantic(Scope *sc)
+{   ScopeDsymbol *sym;
+//printf("ScopeStatement::semantic(sc = %p)\n", sc);
+if (statement)
+{	Statements *a;
+	sym = new ScopeDsymbol();
+	sym->parent = sc->scopesym;
+	sc = sc->push(sym);
+	a = statement->flatten(sc);
+	if (a)
+	{
+	    statement = new CompoundStatement(loc, a);
+	}
+	statement = statement->semantic(sc);
+	if (statement)
+	{
+	    Statement *sentry;
+	    Statement *sexception;
+	    Statement *sfinally;
+	    statement->scopeCode(&sentry, &sexception, &sfinally);
+	    if (sfinally)
+	    {
+		//printf("adding sfinally\n");
+		statement = new CompoundStatement(loc, statement, sfinally);
+	    }
+	}
+	sc->pop();
+}
+return this;
+}
+int ScopeStatement::hasBreak()
+{
+//printf("ScopeStatement::hasBreak() %s\n", toChars());
+return statement ? statement->hasBreak() : FALSE;
+}
+int ScopeStatement::hasContinue()
+{
+return statement ? statement->hasContinue() : FALSE;
+}
+int ScopeStatement::usesEH()
+{
+return statement ? statement->usesEH() : FALSE;
+}
+int ScopeStatement::fallOffEnd()
+{
+return statement ? statement->fallOffEnd() : TRUE;
+}
+int ScopeStatement::comeFrom()
+{
+//printf("ScopeStatement::comeFrom()\n");
+return statement ? statement->comeFrom() : FALSE;
+}
+void ScopeStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writeByte('{');
+buf->writenl();
+if (statement)
+	statement->toCBuffer(buf, hgs);
+buf->writeByte('}');
+buf->writenl();
+}
+/******************************** WhileStatement ***************************/
+WhileStatement::WhileStatement(Loc loc, Expression *c, Statement *b)
+: Statement(loc)
+{
+condition = c;
+body = b;
+}
+Statement *WhileStatement::syntaxCopy()
+{
+WhileStatement *s = new WhileStatement(loc, condition->syntaxCopy(), body ? body->syntaxCopy() : NULL);
+return s;
+}
+Statement *WhileStatement::semantic(Scope *sc)
+{
+#if 0
+if (condition->op == TOKmatch)
+{
+	/* Rewrite while (condition) body as:
+	 *   if (condition)
+	 *     do
+	 *       body
+	 *     while ((_match = _match.opNext), _match);
+	 */
+	Expression *ew = new IdentifierExp(0, Id::_match);
+	ew = new DotIdExp(0, ew, Id::next);
+	ew = new AssignExp(0, new IdentifierExp(0, Id::_match), ew);
+	////ew = new EqualExp(TOKnotequal, 0, ew, new NullExp(0));
+	Expression *ev = new IdentifierExp(0, Id::_match);
+	//ev = new CastExp(0, ev, Type::tvoidptr);
+	ew = new CommaExp(0, ew, ev);
+	Statement *sw = new DoStatement(loc, body, ew);
+	Statement *si = new IfStatement(loc, condition, sw, NULL);
+	return si->semantic(sc);
+}
+#endif
+condition = condition->semantic(sc);
+condition = resolveProperties(sc, condition);
+condition = condition->optimize(WANTvalue);
+condition = condition->checkToBoolean();
+sc->noctor++;
+Scope *scd = sc->push();
+scd->sbreak = this;
+scd->scontinue = this;
+if (body)
+	body = body->semantic(scd);
+scd->pop();
+sc->noctor--;
+return this;
+}
+int WhileStatement::hasBreak()
+{
+return TRUE;
+}
+int WhileStatement::hasContinue()
+{
+return TRUE;
+}
+int WhileStatement::usesEH()
+{
+return body ? body->usesEH() : 0;
+}
+int WhileStatement::fallOffEnd()
+{
+if (body)
+	body->fallOffEnd();
+return TRUE;
+}
+int WhileStatement::comeFrom()
+{
+if (body)
+	return body->comeFrom();
+return FALSE;
+}
+void WhileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("while (");
+condition->toCBuffer(buf, hgs);
+buf->writebyte(')');
+buf->writenl();
+if (body)
+	body->toCBuffer(buf, hgs);
+}
+/******************************** DoStatement ***************************/
+DoStatement::DoStatement(Loc loc, Statement *b, Expression *c)
+: Statement(loc)
+{
+body = b;
+condition = c;
+}
+Statement *DoStatement::syntaxCopy()
+{
+DoStatement *s = new DoStatement(loc, body ? body->syntaxCopy() : NULL, condition->syntaxCopy());
+return s;
+}
+Statement *DoStatement::semantic(Scope *sc)
+{
+sc->noctor++;
+if (body)
+	body = body->semanticScope(sc, this, this);
+sc->noctor--;
+condition = condition->semantic(sc);
+condition = resolveProperties(sc, condition);
+condition = condition->checkToBoolean();
+return this;
+}
+int DoStatement::hasBreak()
+{
+return TRUE;
+}
+int DoStatement::hasContinue()
+{
+return TRUE;
+}
+int DoStatement::usesEH()
+{
+return body ? body->usesEH() : 0;
+}
+int DoStatement::fallOffEnd()
+{
+if (body)
+	body->fallOffEnd();
+return TRUE;
+}
+int DoStatement::comeFrom()
+{
+if (body)
+	return body->comeFrom();
+return FALSE;
+}
+void DoStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("do");
+buf->writenl();
+if (body)
+	body->toCBuffer(buf, hgs);
+buf->writestring("while (");
+condition->toCBuffer(buf, hgs);
+buf->writebyte(')');
+}
+/******************************** ForStatement ***************************/
+ForStatement::ForStatement(Loc loc, Statement *init, Expression *condition, Expression *increment, Statement *body)
+: Statement(loc)
+{
+this->init = init;
+this->condition = condition;
+this->increment = increment;
+this->body = body;
+}
+Statement *ForStatement::syntaxCopy()
+{
+Statement *i = NULL;
+if (init)
+	i = init->syntaxCopy();
+Expression *c = NULL;
+if (condition)
+	c = condition->syntaxCopy();
+Expression *inc = NULL;
+if (increment)
+	inc = increment->syntaxCopy();
+ForStatement *s = new ForStatement(loc, i, c, inc, body->syntaxCopy());
+return s;
+}
+Statement *ForStatement::semantic(Scope *sc)
+{
+ScopeDsymbol *sym = new ScopeDsymbol();
+sym->parent = sc->scopesym;
+sc = sc->push(sym);
+if (init)
+	init = init->semantic(sc);
+if (!condition)
+	// Use a default value
+	condition = new IntegerExp(loc, 1, Type::tboolean);
+sc->noctor++;
+condition = condition->semantic(sc);
+condition = resolveProperties(sc, condition);
+condition = condition->checkToBoolean();
+if (increment)
+	increment = increment->semantic(sc);
+sc->sbreak = this;
+sc->scontinue = this;
+body = body->semantic(sc);
+sc->noctor--;
+sc->pop();
+return this;
+}
+void ForStatement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally)
+{
+//printf("ForStatement::scopeCode()\n");
+//print();
+if (init)
+	init->scopeCode(sentry, sexception, sfinally);
+else
+	Statement::scopeCode(sentry, sexception, sfinally);
+}
+int ForStatement::hasBreak()
+{
+//printf("ForStatement::hasBreak()\n");
+return TRUE;
+}
+int ForStatement::hasContinue()
+{
+return TRUE;
+}
+int ForStatement::usesEH()
+{
+return (init && init->usesEH()) || body->usesEH();
+}
+int ForStatement::fallOffEnd()
+{
+if (body)
+	body->fallOffEnd();
+return TRUE;
+}
+int ForStatement::comeFrom()
+{
+//printf("ForStatement::comeFrom()\n");
+if (body)
+{	int result = body->comeFrom();
+	//printf("result = %d\n", result);
+	return result;
+}
+return FALSE;
+}
+void ForStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("for (");
+if (init)
+{
+hgs->FLinit.init++;
+hgs->FLinit.decl = 0;
+init->toCBuffer(buf, hgs);
+if (hgs->FLinit.decl > 0)
+buf->writebyte(';');
+hgs->FLinit.decl = 0;
+hgs->FLinit.init--;
+}
+else
+buf->writebyte(';');
+if (condition)
+{   buf->writebyte(' ');
+condition->toCBuffer(buf, hgs);
+}
+buf->writebyte(';');
+if (increment)
+{   buf->writebyte(' ');
+increment->toCBuffer(buf, hgs);
+}
+buf->writebyte(')');
+buf->writenl();
+buf->writebyte('{');
+buf->writenl();
+body->toCBuffer(buf, hgs);
+buf->writebyte('}');
+buf->writenl();
+}
+/******************************** ForeachStatement ***************************/
+ForeachStatement::ForeachStatement(Loc loc, enum TOK op, Arguments *arguments,
+	Expression *aggr, Statement *body)
+: Statement(loc)
+{
+this->op = op;
+this->arguments = arguments;
+this->aggr = aggr;
+this->body = body;
+this->key = NULL;
+this->value = NULL;
+this->func = NULL;
+}
+Statement *ForeachStatement::syntaxCopy()
+{
+Arguments *args = Argument::arraySyntaxCopy(arguments);
+Expression *exp = aggr->syntaxCopy();
+ForeachStatement *s = new ForeachStatement(loc, op, args, exp, body->syntaxCopy());
+return s;
+}
+Statement *ForeachStatement::semantic(Scope *sc)
+{
+//printf("ForeachStatement::semantic() %p\n", this);
+ScopeDsymbol *sym;
+Statement *s = this;
+int dim = arguments->dim;
+int i;
+TypeAArray *taa = NULL;
+Type *tn = NULL;
+Type *tnv = NULL;
+func = sc->func;
+if (func->fes)
+	func = func->fes->func;
+aggr = aggr->semantic(sc);
+aggr = resolveProperties(sc, aggr);
+if (!aggr->type)
+{
+	error("invalid foreach aggregate %s", aggr->toChars());
+	return this;
+}
+inferApplyArgTypes(op, arguments, aggr);
+/* Check for inference errors
+*/
+if (dim != arguments->dim)
+{
+	//printf("dim = %d, arguments->dim = %d\n", dim, arguments->dim);
+	error("cannot uniquely infer foreach argument types");
+	return this;
+}
+Type *tab = aggr->type->toBasetype();
+if (tab->ty == Ttuple)	// don't generate new scope for tuple loops
+{
+	if (dim < 1 || dim > 2)
+	{
+	    error("only one (value) or two (key,value) arguments for tuple foreach");
+	    return s;
+	}
+	TypeTuple *tuple = (TypeTuple *)tab;
+	Statements *statements = new Statements();
+	//printf("aggr: op = %d, %s\n", aggr->op, aggr->toChars());
+	size_t n;
+	TupleExp *te = NULL;
+	if (aggr->op == TOKtuple)	// expression tuple
+	{   te = (TupleExp *)aggr;
+	    n = te->exps->dim;
+	}
+	else if (aggr->op == TOKtype)	// type tuple
+	{
+	    n = Argument::dim(tuple->arguments);
+	}
+	else
+	    assert(0);
+	for (size_t j = 0; j < n; j++)
+	{   size_t k = (op == TOKforeach) ? j : n - 1 - j;
+	    Expression *e;
+	    Type *t;
+	    if (te)
+		e = (Expression *)te->exps->data[k];
+	    else
+		t = Argument::getNth(tuple->arguments, k)->type;
+	    Argument *arg = (Argument *)arguments->data[0];
+	    Statements *st = new Statements();
+	    if (dim == 2)
+	    {   // Declare key
+		if (arg->storageClass & (STCout | STCref | STClazy))
+		    error("no storage class for key %s", arg->ident->toChars());
+		TY keyty = arg->type->ty;
+		if ((keyty != Tint32 && keyty != Tuns32) ||
+		    (global.params.is64bit &&
+			    keyty != Tint64 && keyty != Tuns64)
+		   )
+		{
+		    error("foreach: key type must be int or uint, not %s", arg->type->toChars());
+		}
+		Initializer *ie = new ExpInitializer(0, new IntegerExp(k));
+		VarDeclaration *var = new VarDeclaration(loc, arg->type, arg->ident, ie);
+		var->storage_class |= STCconst;
+		DeclarationExp *de = new DeclarationExp(loc, var);
+		st->push(new ExpStatement(loc, de));
+		arg = (Argument *)arguments->data[1];	// value
+	    }
+	    // Declare value
+	    if (arg->storageClass & (STCout | STCref | STClazy))
+		error("no storage class for value %s", arg->ident->toChars());
+	    Dsymbol *var;
+	    if (te)
+	    {
+		if (e->type->toBasetype()->ty == Tfunction &&
+		    e->op == TOKvar)
+		{   VarExp *ve = (VarExp *)e;
+		    var = new AliasDeclaration(loc, arg->ident, ve->var);
+		}
+		else
+		{
+		    arg->type = e->type;
+		    Initializer *ie = new ExpInitializer(0, e);
+		    VarDeclaration *v = new VarDeclaration(loc, arg->type, arg->ident, ie);
+		    if (e->isConst())
+			v->storage_class |= STCconst;
+#if V2
+		    else
+			v->storage_class |= STCfinal;
+#endif
+		    var = v;
+		}
+	    }
+	    else
+	    {
+		var = new AliasDeclaration(loc, arg->ident, t);
+	    }
+	    DeclarationExp *de = new DeclarationExp(loc, var);
+	    st->push(new ExpStatement(loc, de));
+	    st->push(body->syntaxCopy());
+	    s = new CompoundStatement(loc, st);
+	    s = new ScopeStatement(loc, s);
+	    statements->push(s);
+	}
+	s = new UnrolledLoopStatement(loc, statements);
+	s = s->semantic(sc);
+	return s;
+}
+for (i = 0; i < dim; i++)
+{	Argument *arg = (Argument *)arguments->data[i];
+	if (!arg->type)
+	{
+	    error("cannot infer type for %s", arg->ident->toChars());
+	    return this;
+	}
+}
+sym = new ScopeDsymbol();
+sym->parent = sc->scopesym;
+sc = sc->push(sym);
+sc->noctor++;
+switch (tab->ty)
+{
+	case Tarray:
+	case Tsarray:
+	    if (dim < 1 || dim > 2)
+	    {
+		error("only one or two arguments for array foreach");
+		break;
+	    }
+	    /* Look for special case of parsing char types out of char type
+	     * array.
+	     */
+	    tn = tab->next->toBasetype();
+	    if (tn->ty == Tchar || tn->ty == Twchar || tn->ty == Tdchar)
+	    {	Argument *arg;
+		i = (dim == 1) ? 0 : 1;	// index of value
+		arg = (Argument *)arguments->data[i];
+		arg->type = arg->type->semantic(loc, sc);
+		tnv = arg->type->toBasetype();
+		if (tnv->ty != tn->ty &&
+		    (tnv->ty == Tchar || tnv->ty == Twchar || tnv->ty == Tdchar))
+		{
+		    if (arg->storageClass & STCref)
+			error("foreach: value of UTF conversion cannot be ref");
+		    if (dim == 2)
+		    {	arg = (Argument *)arguments->data[0];
+			if (arg->storageClass & STCref)
+			    error("foreach: key cannot be ref");
+		    }
+		    goto Lapply;
+		}
+	    }
+	    for (i = 0; i < dim; i++)
+	    {	// Declare args
+		Argument *arg = (Argument *)arguments->data[i];
+		VarDeclaration *var;
+		var = new VarDeclaration(loc, arg->type, arg->ident, NULL);
+		var->storage_class |= STCforeach;
+		var->storage_class |= arg->storageClass & (STCin | STCout | STCref);
+#if 1
+		DeclarationExp *de = new DeclarationExp(loc, var);
+		de->semantic(sc);
+#else
+		var->semantic(sc);
+		if (!sc->insert(var))
+		    error("%s already defined", var->ident->toChars());
+#endif
+		if (dim == 2 && i == 0)
+		    key = var;
+		else
+		    value = var;
+	    }
+	    sc->sbreak = this;
+	    sc->scontinue = this;
+	    body = body->semantic(sc);
+	    if (!value->type->equals(tab->next))
+	    {
+		if (aggr->op == TOKstring)
+		    aggr = aggr->implicitCastTo(sc, value->type->arrayOf());
+		else
+		    error("foreach: %s is not an array of %s", tab->toChars(), value->type->toChars());
+	    }
+	    if (value->storage_class & STCout && value->type->toBasetype()->ty == Tbit)
+		error("foreach: value cannot be out and type bit");
+	    if (key &&
+		((key->type->ty != Tint32 && key->type->ty != Tuns32) ||
+		 (global.params.is64bit &&
+			key->type->ty != Tint64 && key->type->ty != Tuns64)
+	        )
+	       )
+	    {
+		error("foreach: key type must be int or uint, not %s", key->type->toChars());
+	    }
+	    if (key && key->storage_class & (STCout | STCref))
+		error("foreach: key cannot be out or ref");
+	    break;
+	case Taarray:
+	    taa = (TypeAArray *)tab;
+	    if (dim < 1 || dim > 2)
+	    {
+		error("only one or two arguments for associative array foreach");
+		break;
+	    }
+	    if (op == TOKforeach_reverse)
+	    {
+		error("no reverse iteration on associative arrays");
+	    }
+	    goto Lapply;
+	case Tclass:
+	case Tstruct:
+	case Tdelegate:
+	Lapply:
+	{   FuncDeclaration *fdapply;
+	    Arguments *args;
+	    Expression *ec;
+	    Expression *e;
+	    FuncLiteralDeclaration *fld;
+	    Argument *a;
+	    Type *t;
+	    Expression *flde;
+	    Identifier *id;
+	    Type *tret;
+	    tret = func->type->next;
+	    // Need a variable to hold value from any return statements in body.
+	    if (!sc->func->vresult && tret && tret != Type::tvoid)
+	    {	VarDeclaration *v;
+		v = new VarDeclaration(loc, tret, Id::result, NULL);
+		v->noauto = 1;
+		v->semantic(sc);
+		if (!sc->insert(v))
+		    assert(0);
+		v->parent = sc->func;
+		sc->func->vresult = v;
+	    }
+	    /* Turn body into the function literal:
+	     *	int delegate(ref T arg) { body }
+	     */
+	    args = new Arguments();
+	    for (i = 0; i < dim; i++)
+	    {	Argument *arg = (Argument *)arguments->data[i];
+		arg->type = arg->type->semantic(loc, sc);
+		if (arg->storageClass & STCref)
+		    id = arg->ident;
+		else
+		{   // Make a copy of the ref argument so it isn't
+		    // a reference.
+		    VarDeclaration *v;
+		    Initializer *ie;
+		    char applyArg[10 + sizeof(i)*3 + 1];
+		    sprintf(applyArg, "__applyArg%d", i);
+		    id = Lexer::idPool(applyArg);
+		    ie = new ExpInitializer(0, new IdentifierExp(0, id));
+		    v = new VarDeclaration(0, arg->type, arg->ident, ie);
+		    s = new DeclarationStatement(0, v);
+		    body = new CompoundStatement(loc, s, body);
+		}
+		a = new Argument(STCref, arg->type, id, NULL);
+		args->push(a);
+	    }
+	    t = new TypeFunction(args, Type::tint32, 0, LINKd);
+	    fld = new FuncLiteralDeclaration(loc, 0, t, TOKdelegate, this);
+	    fld->fbody = body;
+	    flde = new FuncExp(loc, fld);
+	    flde = flde->semantic(sc);
+	    // Resolve any forward referenced goto's
+	    for (int i = 0; i < gotos.dim; i++)
+	    {	CompoundStatement *cs = (CompoundStatement *)gotos.data[i];
+		GotoStatement *gs = (GotoStatement *)cs->statements->data[0];
+		if (!gs->label->statement)
+		{   // 'Promote' it to this scope, and replace with a return
+		    cases.push(gs);
+		    s = new ReturnStatement(0, new IntegerExp(cases.dim + 1));
+		    cs->statements->data[0] = (void *)s;
+		}
+	    }
+	    if (tab->ty == Taarray)
+	    {
+		// Check types
+		Argument *arg = (Argument *)arguments->data[0];
+		if (dim == 2)
+		{
+		    if (arg->storageClass & STCref)
+			error("foreach: index cannot be ref");
+		    if (!arg->type->equals(taa->index))
+			error("foreach: index must be type %s, not %s", taa->index->toChars(), arg->type->toChars());
+		    arg = (Argument *)arguments->data[1];
+		}
+		if (!arg->type->equals(taa->next))
+		    error("foreach: value must be type %s, not %s", taa->next->toChars(), arg->type->toChars());
+		/* Call:
+		 *	_aaApply(aggr, keysize, flde)
+		 */
+		if (dim == 2)
+		    fdapply = FuncDeclaration::genCfunc(Type::tindex, "_aaApply2");
+		else
+		    fdapply = FuncDeclaration::genCfunc(Type::tindex, "_aaApply");
+		ec = new VarExp(0, fdapply);
+		Expressions *exps = new Expressions();
+		exps->push(aggr);
+		size_t keysize = taa->key->size();
+		keysize = (keysize + 3) & ~3;
+		exps->push(new IntegerExp(0, keysize, Type::tint32));
+		exps->push(flde);
+		e = new CallExp(loc, ec, exps);
+		e->type = Type::tindex;	// don't run semantic() on e
+	    }
+	    else if (tab->ty == Tarray || tab->ty == Tsarray)
+	    {
+		/* Call:
+		 *	_aApply(aggr, flde)
+		 */
+		static char fntab[9][3] =
+		{ "cc","cw","cd",
+		  "wc","cc","wd",
+		  "dc","dw","dd"
+		};
+		char fdname[7+1+2+ sizeof(dim)*3 + 1];
+		int flag;
+		switch (tn->ty)
+		{
+		    case Tchar:		flag = 0; break;
+		    case Twchar:	flag = 3; break;
+		    case Tdchar:	flag = 6; break;
+		    default:		assert(0);
+		}
+		switch (tnv->ty)
+		{
+		    case Tchar:		flag += 0; break;
+		    case Twchar:	flag += 1; break;
+		    case Tdchar:	flag += 2; break;
+		    default:		assert(0);
+		}
+		const char *r = (op == TOKforeach_reverse) ? "R" : "";
+		int j = sprintf(fdname, "_aApply%s%.*s%d", r, 2, fntab[flag], dim);
+		assert(j < sizeof(fdname));
+		fdapply = FuncDeclaration::genCfunc(Type::tindex, fdname);
+		ec = new VarExp(0, fdapply);
+		Expressions *exps = new Expressions();
+		if (tab->ty == Tsarray)
+		   aggr = aggr->castTo(sc, tn->arrayOf());
+		exps->push(aggr);
+		exps->push(flde);
+		e = new CallExp(loc, ec, exps);
+		e->type = Type::tindex;	// don't run semantic() on e
+	    }
+	    else if (tab->ty == Tdelegate)
+	    {
+		/* Call:
+		 *	aggr(flde)
+		 */
+		Expressions *exps = new Expressions();
+		exps->push(flde);
+		e = new CallExp(loc, aggr, exps);
+		e = e->semantic(sc);
+		if (e->type != Type::tint32)
+		    error("opApply() function for %s must return an int", tab->toChars());
+	    }
+	    else
+	    {
+		/* Call:
+		 *	aggr.apply(flde)
+		 */
+		ec = new DotIdExp(loc, aggr,
+			(op == TOKforeach_reverse) ? Id::applyReverse
+						   : Id::apply);
+		Expressions *exps = new Expressions();
+		exps->push(flde);
+		e = new CallExp(loc, ec, exps);
+		e = e->semantic(sc);
+		if (e->type != Type::tint32)
+		    error("opApply() function for %s must return an int", tab->toChars());
+	    }
+	    if (!cases.dim)
+		// Easy case, a clean exit from the loop
+		s = new ExpStatement(loc, e);
+	    else
+	    {	// Construct a switch statement around the return value
+		// of the apply function.
+		Statements *a = new Statements();
+		// default: break; takes care of cases 0 and 1
+		s = new BreakStatement(0, NULL);
+		s = new DefaultStatement(0, s);
+		a->push(s);
+		// cases 2...
+		for (int i = 0; i < cases.dim; i++)
+		{
+		    s = (Statement *)cases.data[i];
+		    s = new CaseStatement(0, new IntegerExp(i + 2), s);
+		    a->push(s);
+		}
+		s = new CompoundStatement(loc, a);
+		s = new SwitchStatement(loc, e, s);
+		s = s->semantic(sc);
+	    }
+	    break;
+	}
+	default:
+	    error("foreach: %s is not an aggregate type", aggr->type->toChars());
+	    break;
+}
+sc->noctor--;
+sc->pop();
+return s;
+}
+int ForeachStatement::hasBreak()
+{
+return TRUE;
+}
+int ForeachStatement::hasContinue()
+{
+return TRUE;
+}
+int ForeachStatement::usesEH()
+{
+return body->usesEH();
+}
+int ForeachStatement::fallOffEnd()
+{
+if (body)
+	body->fallOffEnd();
+return TRUE;
+}
+int ForeachStatement::comeFrom()
+{
+if (body)
+	return body->comeFrom();
+return FALSE;
+}
+void ForeachStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(Token::toChars(op));
+buf->writestring(" (");
+int i;
+for (int i = 0; i < arguments->dim; i++)
+{
+	Argument *a = (Argument *)arguments->data[i];
+	if (i)
+	    buf->writestring(", ");
+	if (a->storageClass & STCref)
+	    buf->writestring((global.params.Dversion == 1)
+		? (char*)"inout " : (char*)"ref ");
+	if (a->type)
+	    a->type->toCBuffer(buf, a->ident, hgs);
+	else
+	    buf->writestring(a->ident->toChars());
+}
+buf->writestring("; ");
+aggr->toCBuffer(buf, hgs);
+buf->writebyte(')');
+buf->writenl();
+buf->writebyte('{');
+buf->writenl();
+if (body)
+	body->toCBuffer(buf, hgs);
+buf->writebyte('}');
+buf->writenl();
+}
+/******************************** IfStatement ***************************/
+IfStatement::IfStatement(Loc loc, Argument *arg, Expression *condition, Statement *ifbody, Statement *elsebody)
+: Statement(loc)
+{
+this->arg = arg;
+this->condition = condition;
+this->ifbody = ifbody;
+this->elsebody = elsebody;
+this->match = NULL;
+}
+Statement *IfStatement::syntaxCopy()
+{
+Statement *i = NULL;
+if (ifbody)
+i = ifbody->syntaxCopy();
+Statement *e = NULL;
+if (elsebody)
+	e = elsebody->syntaxCopy();
+Argument *a = arg ? arg->syntaxCopy() : NULL;
+IfStatement *s = new IfStatement(loc, a, condition->syntaxCopy(), i, e);
+return s;
+}
+Statement *IfStatement::semantic(Scope *sc)
+{
+condition = condition->semantic(sc);
+condition = resolveProperties(sc, condition);
+condition = condition->checkToBoolean();
+// If we can short-circuit evaluate the if statement, don't do the
+// semantic analysis of the skipped code.
+// This feature allows a limited form of conditional compilation.
+condition = condition->optimize(WANTflags);
+// Evaluate at runtime
+unsigned cs0 = sc->callSuper;
+unsigned cs1;
+Scope *scd;
+if (arg)
+{	/* Declare arg, which we will set to be the
+	 * result of condition.
+	 */
+	ScopeDsymbol *sym = new ScopeDsymbol();
+	sym->parent = sc->scopesym;
+	scd = sc->push(sym);
+	Type *t = arg->type ? arg->type : condition->type;
+	match = new VarDeclaration(loc, t, arg->ident, NULL);
+	match->noauto = 1;
+	match->semantic(scd);
+	if (!scd->insert(match))
+	    assert(0);
+	match->parent = sc->func;
+	/* Generate:
+	 *  (arg = condition)
+	 */
+	VarExp *v = new VarExp(0, match);
+	condition = new AssignExp(loc, v, condition);
+	condition = condition->semantic(scd);
+}
+else
+	scd = sc->push();
+ifbody = ifbody->semantic(scd);
+scd->pop();
+cs1 = sc->callSuper;
+sc->callSuper = cs0;
+if (elsebody)
+	elsebody = elsebody->semanticScope(sc, NULL, NULL);
+sc->mergeCallSuper(loc, cs1);
+return this;
+}
+int IfStatement::usesEH()
+{
+return (ifbody && ifbody->usesEH()) || (elsebody && elsebody->usesEH());
+}
+int IfStatement::fallOffEnd()
+{
+if (!ifbody || ifbody->fallOffEnd() ||
+	!elsebody || elsebody->fallOffEnd())
+	return TRUE;
+return FALSE;
+}
+void IfStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("if (");
+if (arg)
+{
+	if (arg->type)
+	    arg->type->toCBuffer(buf, arg->ident, hgs);
+	else
+	    buf->writestring(arg->ident->toChars());
+	buf->writebyte(';');
+}
+condition->toCBuffer(buf, hgs);
+buf->writebyte(')');
+buf->writenl();
+ifbody->toCBuffer(buf, hgs);
+if (elsebody)
+{   buf->writestring("else");
+buf->writenl();
+elsebody->toCBuffer(buf, hgs);
+}
+}
+/******************************** ConditionalStatement ***************************/
+ConditionalStatement::ConditionalStatement(Loc loc, Condition *condition, Statement *ifbody, Statement *elsebody)
+: Statement(loc)
+{
+this->condition = condition;
+this->ifbody = ifbody;
+this->elsebody = elsebody;
+}
+Statement *ConditionalStatement::syntaxCopy()
+{
+Statement *e = NULL;
+if (elsebody)
+	e = elsebody->syntaxCopy();
+ConditionalStatement *s = new ConditionalStatement(loc,
+		condition->syntaxCopy(), ifbody->syntaxCopy(), e);
+return s;
+}
+Statement *ConditionalStatement::semantic(Scope *sc)
+{
+//printf("ConditionalStatement::semantic()\n");
+// If we can short-circuit evaluate the if statement, don't do the
+// semantic analysis of the skipped code.
+// This feature allows a limited form of conditional compilation.
+if (condition->include(sc, NULL))
+{
+	ifbody = ifbody->semantic(sc);
+	return ifbody;
+}
+else
+{
+	if (elsebody)
+	    elsebody = elsebody->semantic(sc);
+	return elsebody;
+}
+}
+Statements *ConditionalStatement::flatten(Scope *sc)
+{
+Statement *s;
+if (condition->include(sc, NULL))
+	s = ifbody;
+else
+	s = elsebody;
+Statements *a = new Statements();
+a->push(s);
+return a;
+}
+int ConditionalStatement::usesEH()
+{
+return (ifbody && ifbody->usesEH()) || (elsebody && elsebody->usesEH());
+}
+void ConditionalStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+condition->toCBuffer(buf, hgs);
+buf->writenl();
+if (ifbody)
+	ifbody->toCBuffer(buf, hgs);
+if (elsebody)
+{
+	buf->writestring("else");
+	buf->writenl();
+	elsebody->toCBuffer(buf, hgs);
+}
+buf->writenl();
+}
+/******************************** PragmaStatement ***************************/
+PragmaStatement::PragmaStatement(Loc loc, Identifier *ident, Expressions *args, Statement *body)
+: Statement(loc)
+{
+this->ident = ident;
+this->args = args;
+this->body = body;
+}
+Statement *PragmaStatement::syntaxCopy()
+{
+Statement *b = NULL;
+if (body)
+	b = body->syntaxCopy();
+PragmaStatement *s = new PragmaStatement(loc,
+		ident, Expression::arraySyntaxCopy(args), b);
+return s;
+}
+Statement *PragmaStatement::semantic(Scope *sc)
+{   // Should be merged with PragmaDeclaration
+//printf("PragmaStatement::semantic() %s\n", toChars());
+//printf("body = %p\n", body);
+if (ident == Id::msg)
+{
+if (args)
+{
+for (size_t i = 0; i < args->dim; i++)
+{
+Expression *e = (Expression *)args->data[i];
+e = e->semantic(sc);
+		e = e->optimize(WANTvalue | WANTinterpret);
+if (e->op == TOKstring)
+{
+StringExp *se = (StringExp *)e;
+fprintf(stdmsg, "%.*s", (int)se->len, se->string);
+}
+else
+		    error("string expected for message, not '%s'", e->toChars());
+}
+fprintf(stdmsg, "\n");
+}
+}
+else if (ident == Id::lib)
+{
+	if (!args || args->dim != 1)
+	    error("string expected for library name");
+	else
+	{
+	    Expression *e = (Expression *)args->data[0];
+	    e = e->semantic(sc);
+	    e = e->optimize(WANTvalue | WANTinterpret);
+	    args->data[0] = (void *)e;
+	    if (e->op != TOKstring)
+		error("string expected for library name, not '%s'", e->toChars());
+	    else if (global.params.verbose)
+	    {
+		StringExp *se = (StringExp *)e;
+		char *name = (char *)mem.malloc(se->len + 1);
+		memcpy(name, se->string, se->len);
+		name[se->len] = 0;
+		printf("library   %s\n", name);
+		mem.free(name);
+	    }
+	}
+}
+else
+error("unrecognized pragma(%s)", ident->toChars());
+if (body)
+{
+	body = body->semantic(sc);
+}
+return body;
+}
+int PragmaStatement::usesEH()
+{
+return body && body->usesEH();
+}
+int PragmaStatement::fallOffEnd()
+{
+if (body)
+	return body->fallOffEnd();
+return TRUE;
+}
+void PragmaStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("pragma (");
+buf->writestring(ident->toChars());
+if (args && args->dim)
+{
+	buf->writestring(", ");
+	argsToCBuffer(buf, args, hgs);
+}
+buf->writeByte(')');
+if (body)
+{
+	buf->writenl();
+	buf->writeByte('{');
+	buf->writenl();
+	body->toCBuffer(buf, hgs);
+	buf->writeByte('}');
+	buf->writenl();
+}
+else
+{
+	buf->writeByte(';');
+	buf->writenl();
+}
+}
+/******************************** StaticAssertStatement ***************************/
+StaticAssertStatement::StaticAssertStatement(StaticAssert *sa)
+: Statement(sa->loc)
+{
+this->sa = sa;
+}
+Statement *StaticAssertStatement::syntaxCopy()
+{
+StaticAssertStatement *s = new StaticAssertStatement((StaticAssert *)sa->syntaxCopy(NULL));
+return s;
+}
+Statement *StaticAssertStatement::semantic(Scope *sc)
+{
+sa->semantic2(sc);
+return NULL;
+}
+void StaticAssertStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+sa->toCBuffer(buf, hgs);
+}
+/******************************** SwitchStatement ***************************/
+SwitchStatement::SwitchStatement(Loc loc, Expression *c, Statement *b)
+: Statement(loc)
+{
+condition = c;
+body = b;
+sdefault = NULL;
+cases = NULL;
+hasNoDefault = 0;
+}
+Statement *SwitchStatement::syntaxCopy()
+{
+SwitchStatement *s = new SwitchStatement(loc,
+	condition->syntaxCopy(), body->syntaxCopy());
+return s;
+}
+Statement *SwitchStatement::semantic(Scope *sc)
+{
+//printf("SwitchStatement::semantic(%p)\n", this);
+assert(!cases);		// ensure semantic() is only run once
+condition = condition->semantic(sc);
+condition = resolveProperties(sc, condition);
+if (condition->type->isString())
+{
+	// If it's not an array, cast it to one
+	if (condition->type->ty != Tarray)
+	{
+	    condition = condition->implicitCastTo(sc, condition->type->next->arrayOf());
+	}
+}
+else
+{	condition = condition->integralPromotions(sc);
+	condition->checkIntegral();
+}
+sc = sc->push();
+sc->sbreak = this;
+sc->sw = this;
+cases = new Array();
+sc->noctor++;	// BUG: should use Scope::mergeCallSuper() for each case instead
+body = body->semantic(sc);
+sc->noctor--;
+// Resolve any goto case's with exp
+for (int i = 0; i < gotoCases.dim; i++)
+{
+	GotoCaseStatement *gcs = (GotoCaseStatement *)gotoCases.data[i];
+	if (!gcs->exp)
+	{
+	    gcs->error("no case statement following goto case;");
+	    break;
+	}
+	for (Scope *scx = sc; scx; scx = scx->enclosing)
+	{
+	    if (!scx->sw)
+		continue;
+	    for (int j = 0; j < scx->sw->cases->dim; j++)
+	    {
+		CaseStatement *cs = (CaseStatement *)scx->sw->cases->data[j];
+		if (cs->exp->equals(gcs->exp))
+		{
+		    gcs->cs = cs;
+		    goto Lfoundcase;
+		}
+	    }
+	}
+	gcs->error("case %s not found", gcs->exp->toChars());
+Lfoundcase:
+	;
+}
+if (!sc->sw->sdefault)
+{	hasNoDefault = 1;
+	if (global.params.warnings)
+	{   fprintf(stdmsg, "warning - ");
+	    error("switch statement has no default");
+	}
+	// Generate runtime error if the default is hit
+	Statements *a = new Statements();
+	CompoundStatement *cs;
+	Statement *s;
+	if (global.params.useSwitchError)
+	    s = new SwitchErrorStatement(loc);
+	else
+	{   Expression *e = new HaltExp(loc);
+	    s = new ExpStatement(loc, e);
+	}
+	a->reserve(4);
+	a->push(body);
+	a->push(new BreakStatement(loc, NULL));
+	sc->sw->sdefault = new DefaultStatement(loc, s);
+	a->push(sc->sw->sdefault);
+	cs = new CompoundStatement(loc, a);
+	body = cs;
+}
+sc->pop();
+return this;
+}
+int SwitchStatement::hasBreak()
+{
+return TRUE;
+}
+int SwitchStatement::usesEH()
+{
+return body ? body->usesEH() : 0;
+}
+int SwitchStatement::fallOffEnd()
+{
+if (body)
+	body->fallOffEnd();
+return TRUE;	// need to do this better
+}
+void SwitchStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("switch (");
+condition->toCBuffer(buf, hgs);
+buf->writebyte(')');
+buf->writenl();
+if (body)
+{
+	if (!body->isScopeStatement())
+{   buf->writebyte('{');
+buf->writenl();
+body->toCBuffer(buf, hgs);
+buf->writebyte('}');
+buf->writenl();
+}
+else
+{
+body->toCBuffer(buf, hgs);
+}
+}
+}
+/******************************** CaseStatement ***************************/
+CaseStatement::CaseStatement(Loc loc, Expression *exp, Statement *s)
+: Statement(loc)
+{
+this->exp = exp;
+this->statement = s;
+cblock = NULL;
+}
+Statement *CaseStatement::syntaxCopy()
+{
+CaseStatement *s = new CaseStatement(loc, exp->syntaxCopy(), statement->syntaxCopy());
+return s;
+}
+Statement *CaseStatement::semantic(Scope *sc)
+{   SwitchStatement *sw = sc->sw;
+exp = exp->semantic(sc);
+if (sw)
+{	int i;
+	exp = exp->implicitCastTo(sc, sw->condition->type);
+	exp = exp->optimize(WANTvalue | WANTinterpret);
+	if (exp->op != TOKstring && exp->op != TOKint64)
+	{
+	    error("case must be a string or an integral constant, not %s", exp->toChars());
+	    exp = new IntegerExp(0);
+	}
+	for (i = 0; i < sw->cases->dim; i++)
+	{
+	    CaseStatement *cs = (CaseStatement *)sw->cases->data[i];
+	    //printf("comparing '%s' with '%s'\n", exp->toChars(), cs->exp->toChars());
+	    if (cs->exp->equals(exp))
+	    {	error("duplicate case %s in switch statement", exp->toChars());
+		break;
+	    }
+	}
+	sw->cases->push(this);
+	// Resolve any goto case's with no exp to this case statement
+	for (i = 0; i < sw->gotoCases.dim; i++)
+	{
+	    GotoCaseStatement *gcs = (GotoCaseStatement *)sw->gotoCases.data[i];
+	    if (!gcs->exp)
+	    {
+		gcs->cs = this;
+		sw->gotoCases.remove(i);	// remove from array
+	    }
+	}
+}
+else
+	error("case not in switch statement");
+statement = statement->semantic(sc);
+return this;
+}
+int CaseStatement::compare(Object *obj)
+{
+// Sort cases so we can do an efficient lookup
+CaseStatement *cs2 = (CaseStatement *)(obj);
+return exp->compare(cs2->exp);
+}
+int CaseStatement::usesEH()
+{
+return statement->usesEH();
+}
+int CaseStatement::fallOffEnd()
+{
+return statement->fallOffEnd();
+}
+int CaseStatement::comeFrom()
+{
+return TRUE;
+}
+void CaseStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("case ");
+exp->toCBuffer(buf, hgs);
+buf->writebyte(':');
+buf->writenl();
+statement->toCBuffer(buf, hgs);
+}
+/******************************** DefaultStatement ***************************/
+DefaultStatement::DefaultStatement(Loc loc, Statement *s)
+: Statement(loc)
+{
+this->statement = s;
+#if IN_GCC
++    cblock = NULL;
+#endif
+}
+Statement *DefaultStatement::syntaxCopy()
+{
+DefaultStatement *s = new DefaultStatement(loc, statement->syntaxCopy());
+return s;
+}
+Statement *DefaultStatement::semantic(Scope *sc)
+{
+if (sc->sw)
+{
+	if (sc->sw->sdefault)
+	{
+	    error("switch statement already has a default");
+	}
+	sc->sw->sdefault = this;
+}
+else
+	error("default not in switch statement");
+statement = statement->semantic(sc);
+return this;
+}
+int DefaultStatement::usesEH()
+{
+return statement->usesEH();
+}
+int DefaultStatement::fallOffEnd()
+{
+return statement->fallOffEnd();
+}
+int DefaultStatement::comeFrom()
+{
+return TRUE;
+}
+void DefaultStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("default:\n");
+statement->toCBuffer(buf, hgs);
+}
+/******************************** GotoDefaultStatement ***************************/
+GotoDefaultStatement::GotoDefaultStatement(Loc loc)
+: Statement(loc)
+{
+sw = NULL;
+}
+Statement *GotoDefaultStatement::syntaxCopy()
+{
+GotoDefaultStatement *s = new GotoDefaultStatement(loc);
+return s;
+}
+Statement *GotoDefaultStatement::semantic(Scope *sc)
+{
+sw = sc->sw;
+if (!sw)
+	error("goto default not in switch statement");
+return this;
+}
+int GotoDefaultStatement::fallOffEnd()
+{
+return FALSE;
+}
+void GotoDefaultStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("goto default;\n");
+}
+/******************************** GotoCaseStatement ***************************/
+GotoCaseStatement::GotoCaseStatement(Loc loc, Expression *exp)
+: Statement(loc)
+{
+cs = NULL;
+this->exp = exp;
+}
+Statement *GotoCaseStatement::syntaxCopy()
+{
+Expression *e = exp ? exp->syntaxCopy() : NULL;
+GotoCaseStatement *s = new GotoCaseStatement(loc, e);
+return s;
+}
+Statement *GotoCaseStatement::semantic(Scope *sc)
+{
+if (exp)
+	exp = exp->semantic(sc);
+if (!sc->sw)
+	error("goto case not in switch statement");
+else
+{
+	sc->sw->gotoCases.push(this);
+	if (exp)
+	{
+	    exp = exp->implicitCastTo(sc, sc->sw->condition->type);
+	    exp = exp->optimize(WANTvalue);
+	}
+}
+return this;
+}
+int GotoCaseStatement::fallOffEnd()
+{
+return FALSE;
+}
+void GotoCaseStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("goto case");
+if (exp)
+{   buf->writebyte(' ');
+exp->toCBuffer(buf, hgs);
+}
+buf->writebyte(';');
+buf->writenl();
+}
+/******************************** SwitchErrorStatement ***************************/
+SwitchErrorStatement::SwitchErrorStatement(Loc loc)
+: Statement(loc)
+{
+}
+int SwitchErrorStatement::fallOffEnd()
+{
+return FALSE;
+}
+void SwitchErrorStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("SwitchErrorStatement::toCBuffer()");
+buf->writenl();
+}
+/******************************** ReturnStatement ***************************/
+ReturnStatement::ReturnStatement(Loc loc, Expression *exp)
+: Statement(loc)
+{
+this->exp = exp;
+}
+Statement *ReturnStatement::syntaxCopy()
+{
+Expression *e = NULL;
+if (exp)
+	e = exp->syntaxCopy();
+ReturnStatement *s = new ReturnStatement(loc, e);
+return s;
+}
+Statement *ReturnStatement::semantic(Scope *sc)
+{
+//printf("ReturnStatement::semantic() %s\n", toChars());
+FuncDeclaration *fd = sc->parent->isFuncDeclaration();
+Scope *scx = sc;
+int implicit0 = 0;
+if (sc->fes)
+{
+	// Find scope of function foreach is in
+	for (; 1; scx = scx->enclosing)
+	{
+	    assert(scx);
+	    if (scx->func != fd)
+	    {	fd = scx->func;		// fd is now function enclosing foreach
+		break;
+	    }
+	}
+}
+Type *tret = fd->type->next;
+if (fd->tintro)
+	tret = fd->tintro->next;
+Type *tbret = NULL;
+if (tret)
+	tbret = tret->toBasetype();
+// main() returns 0, even if it returns void
+if (!exp && (!tbret || tbret->ty == Tvoid) && fd->isMain())
+{	implicit0 = 1;
+	exp = new IntegerExp(0);
+}
+if (sc->incontract || scx->incontract)
+	error("return statements cannot be in contracts");
+if (sc->tf || scx->tf)
+	error("return statements cannot be in finally, scope(exit) or scope(success) bodies");
+if (fd->isCtorDeclaration())
+{
+	// Constructors implicitly do:
+	//	return this;
+	if (exp && exp->op != TOKthis)
+	    error("cannot return expression from constructor");
+	exp = new ThisExp(0);
+}
+if (!exp)
+	fd->nrvo_can = 0;
+if (exp)
+{
+	fd->hasReturnExp |= 1;
+	exp = exp->semantic(sc);
+	exp = resolveProperties(sc, exp);
+	exp = exp->optimize(WANTvalue);
+	if (fd->nrvo_can && exp->op == TOKvar)
+	{   VarExp *ve = (VarExp *)exp;
+	    VarDeclaration *v = ve->var->isVarDeclaration();
+	    if (!v || v->isOut() || v->isRef())
+		fd->nrvo_can = 0;
+	    else if (fd->nrvo_var == NULL)
+	    {	if (!v->isDataseg() && !v->isParameter() && v->toParent2() == fd)
+		    fd->nrvo_var = v;
+		else
+		    fd->nrvo_can = 0;
+	    }
+	    else if (fd->nrvo_var != v)
+		fd->nrvo_can = 0;
+	}
+	else
+	    fd->nrvo_can = 0;
+	if (fd->returnLabel && tbret->ty != Tvoid)
+	{
+	}
+	else if (fd->inferRetType)
+	{
+	    if (fd->type->next)
+	    {
+		if (!exp->type->equals(fd->type->next))
+		    error("mismatched function return type inference of %s and %s",
+			exp->type->toChars(), fd->type->next->toChars());
+	    }
+	    else
+	    {
+		fd->type->next = exp->type;
+		fd->type = fd->type->semantic(loc, sc);
+		if (!fd->tintro)
+		{   tret = fd->type->next;
+		    tbret = tret->toBasetype();
+		}
+	    }
+	}
+	else if (tbret->ty != Tvoid)
+	{
+	    exp = exp->implicitCastTo(sc, tret);
+	}
+}
+else if (fd->inferRetType)
+{
+	if (fd->type->next)
+	{
+	    if (fd->type->next->ty != Tvoid)
+		error("mismatched function return type inference of void and %s",
+		    fd->type->next->toChars());
+	}
+	else
+	{
+	    fd->type->next = Type::tvoid;
+	    fd->type = fd->type->semantic(loc, sc);
+	    if (!fd->tintro)
+	    {   tret = Type::tvoid;
+		tbret = tret;
+	    }
+	}
+}
+else if (tbret->ty != Tvoid)	// if non-void return
+	error("return expression expected");
+if (sc->fes)
+{
+	Statement *s;
+	if (exp && !implicit0)
+	{
+	    exp = exp->implicitCastTo(sc, tret);
+	}
+	if (!exp || exp->op == TOKint64 || exp->op == TOKfloat64 ||
+	    exp->op == TOKimaginary80 || exp->op == TOKcomplex80 ||
+	    exp->op == TOKthis || exp->op == TOKsuper || exp->op == TOKnull ||
+	    exp->op == TOKstring)
+	{
+	    sc->fes->cases.push(this);
+	    s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1));
+	}
+	else if (fd->type->next->toBasetype() == Type::tvoid)
+	{
+	    Statement *s1;
+	    Statement *s2;
+	    s = new ReturnStatement(0, NULL);
+	    sc->fes->cases.push(s);
+	    // Construct: { exp; return cases.dim + 1; }
+	    s1 = new ExpStatement(loc, exp);
+	    s2 = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1));
+	    s = new CompoundStatement(loc, s1, s2);
+	}
+	else
+	{
+	    VarExp *v;
+	    Statement *s1;
+	    Statement *s2;
+	    // Construct: return vresult;
+	    if (!fd->vresult)
+	    {	VarDeclaration *v;
+		v = new VarDeclaration(loc, tret, Id::result, NULL);
+		v->noauto = 1;
+		v->semantic(scx);
+		if (!scx->insert(v))
+		    assert(0);
+		v->parent = fd;
+		fd->vresult = v;
+	    }
+	    v = new VarExp(0, fd->vresult);
+	    s = new ReturnStatement(0, v);
+	    sc->fes->cases.push(s);
+	    // Construct: { vresult = exp; return cases.dim + 1; }
+	    v = new VarExp(0, fd->vresult);
+	    exp = new AssignExp(loc, v, exp);
+	    exp = exp->semantic(sc);
+	    s1 = new ExpStatement(loc, exp);
+	    s2 = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1));
+	    s = new CompoundStatement(loc, s1, s2);
+	}
+	return s;
+}
+if (exp)
+{
+	if (fd->returnLabel && tbret->ty != Tvoid)
+	{
+	    assert(fd->vresult);
+	    VarExp *v = new VarExp(0, fd->vresult);
+	    exp = new AssignExp(loc, v, exp);
+	    exp = exp->semantic(sc);
+	}
+	//exp->dump(0);
+	//exp->print();
+	exp->checkEscape();
+}
+/* BUG: need to issue an error on:
+*	this
+*	{   if (x) return;
+*	    super();
+*	}
+*/
+if (sc->callSuper & CSXany_ctor &&
+	!(sc->callSuper & (CSXthis_ctor | CSXsuper_ctor)))
+	error("return without calling constructor");
+sc->callSuper |= CSXreturn;
+// See if all returns are instead to be replaced with a goto returnLabel;
+if (fd->returnLabel)
+{
+	GotoStatement *gs = new GotoStatement(loc, Id::returnLabel);
+	gs->label = fd->returnLabel;
+	if (exp)
+	{   Statement *s;
+	    s = new ExpStatement(0, exp);
+	    return new CompoundStatement(loc, s, gs);
+	}
+	return gs;
+}
+if (exp && tbret->ty == Tvoid && !fd->isMain())
+{   Statement *s;
+	s = new ExpStatement(loc, exp);
+	loc = 0;
+	exp = NULL;
+	return new CompoundStatement(loc, s, this);
+}
+return this;
+}
+int ReturnStatement::fallOffEnd()
+{
+return FALSE;
+}
+void ReturnStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->printf("return ");
+if (exp)
+	exp->toCBuffer(buf, hgs);
+buf->writeByte(';');
+buf->writenl();
+}
+/******************************** BreakStatement ***************************/
+BreakStatement::BreakStatement(Loc loc, Identifier *ident)
+: Statement(loc)
+{
+this->ident = ident;
+}
+Statement *BreakStatement::syntaxCopy()
+{
+BreakStatement *s = new BreakStatement(loc, ident);
+return s;
+}
+Statement *BreakStatement::semantic(Scope *sc)
+{
+// If:
+//	break Identifier;
+if (ident)
+{
+	Scope *scx;
+	FuncDeclaration *thisfunc = sc->func;
+	for (scx = sc; scx; scx = scx->enclosing)
+	{
+	    LabelStatement *ls;
+	    if (scx->func != thisfunc)	// if in enclosing function
+	    {
+		if (sc->fes)		// if this is the body of a foreach
+		{
+		    /* Post this statement to the fes, and replace
+		     * it with a return value that caller will put into
+		     * a switch. Caller will figure out where the break
+		     * label actually is.
+		     * Case numbers start with 2, not 0, as 0 is continue
+		     * and 1 is break.
+		     */
+		    Statement *s;
+		    sc->fes->cases.push(this);
+		    s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1));
+		    return s;
+		}
+		break;			// can't break to it
+	    }
+	    ls = scx->slabel;
+	    if (ls && ls->ident == ident)
+	    {
+		Statement *s = ls->statement;
+		if (!s->hasBreak())
+		    error("label '%s' has no break", ident->toChars());
+		if (ls->tf != sc->tf)
+		    error("cannot break out of finally block");
+		return this;
+	    }
+	}
+	error("enclosing label '%s' for break not found", ident->toChars());
+}
+else if (!sc->sbreak)
+{
+	if (sc->fes)
+	{   Statement *s;
+	    // Replace break; with return 1;
+	    s = new ReturnStatement(0, new IntegerExp(1));
+	    return s;
+	}
+	error("break is not inside a loop or switch");
+}
+return this;
+}
+int BreakStatement::fallOffEnd()
+{
+return FALSE;
+}
+void BreakStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("break");
+if (ident)
+{   buf->writebyte(' ');
+buf->writestring(ident->toChars());
+}
+buf->writebyte(';');
+buf->writenl();
+}
+/******************************** ContinueStatement ***************************/
+ContinueStatement::ContinueStatement(Loc loc, Identifier *ident)
+: Statement(loc)
+{
+this->ident = ident;
+}
+Statement *ContinueStatement::syntaxCopy()
+{
+ContinueStatement *s = new ContinueStatement(loc, ident);
+return s;
+}
+Statement *ContinueStatement::semantic(Scope *sc)
+{
+//printf("ContinueStatement::semantic() %p\n", this);
+if (ident)
+{
+	Scope *scx;
+	FuncDeclaration *thisfunc = sc->func;
+	for (scx = sc; scx; scx = scx->enclosing)
+	{
+	    LabelStatement *ls;
+	    if (scx->func != thisfunc)	// if in enclosing function
+	    {
+		if (sc->fes)		// if this is the body of a foreach
+		{
+		    for (; scx; scx = scx->enclosing)
+		    {
+			ls = scx->slabel;
+			if (ls && ls->ident == ident && ls->statement == sc->fes)
+			{
+			    // Replace continue ident; with return 0;
+			    return new ReturnStatement(0, new IntegerExp(0));
+			}
+		    }
+		    /* Post this statement to the fes, and replace
+		     * it with a return value that caller will put into
+		     * a switch. Caller will figure out where the break
+		     * label actually is.
+		     * Case numbers start with 2, not 0, as 0 is continue
+		     * and 1 is break.
+		     */
+		    Statement *s;
+		    sc->fes->cases.push(this);
+		    s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1));
+		    return s;
+		}
+		break;			// can't continue to it
+	    }
+	    ls = scx->slabel;
+	    if (ls && ls->ident == ident)
+	    {
+		Statement *s = ls->statement;
+		if (!s->hasContinue())
+		    error("label '%s' has no continue", ident->toChars());
+		if (ls->tf != sc->tf)
+		    error("cannot continue out of finally block");
+		return this;
+	    }
+	}
+	error("enclosing label '%s' for continue not found", ident->toChars());
+}
+else if (!sc->scontinue)
+{
+	if (sc->fes)
+	{   Statement *s;
+	    // Replace continue; with return 0;
+	    s = new ReturnStatement(0, new IntegerExp(0));
+	    return s;
+	}
+	error("continue is not inside a loop");
+}
+return this;
+}
+int ContinueStatement::fallOffEnd()
+{
+return FALSE;
+}
+void ContinueStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("continue");
+if (ident)
+{   buf->writebyte(' ');
+buf->writestring(ident->toChars());
+}
+buf->writebyte(';');
+buf->writenl();
+}
+/******************************** SynchronizedStatement ***************************/
+SynchronizedStatement::SynchronizedStatement(Loc loc, Expression *exp, Statement *body)
+: Statement(loc)
+{
+this->exp = exp;
+this->body = body;
+this->esync = NULL;
+}
+SynchronizedStatement::SynchronizedStatement(Loc loc, elem *esync, Statement *body)
+: Statement(loc)
+{
+this->exp = NULL;
+this->body = body;
+this->esync = esync;
+}
+Statement *SynchronizedStatement::syntaxCopy()
+{
+Expression *e = exp ? exp->syntaxCopy() : NULL;
+SynchronizedStatement *s = new SynchronizedStatement(loc, e, body ? body->syntaxCopy() : NULL);
+return s;
+}
+Statement *SynchronizedStatement::semantic(Scope *sc)
+{
+if (exp)
+{	ClassDeclaration *cd;
+	exp = exp->semantic(sc);
+	exp = resolveProperties(sc, exp);
+	cd = exp->type->isClassHandle();
+	if (!cd)
+	    error("can only synchronize on class objects, not '%s'", exp->type->toChars());
+	else if (cd->isInterfaceDeclaration())
+	{   Type *t = new TypeIdentifier(0, Id::Object);
+	    t = t->semantic(0, sc);
+	    exp = new CastExp(loc, exp, t);
+	    exp = exp->semantic(sc);
+	}
+}
+if (body)
+	body = body->semantic(sc);
+return this;
+}
+int SynchronizedStatement::hasBreak()
+{
+return FALSE; //TRUE;
+}
+int SynchronizedStatement::hasContinue()
+{
+return FALSE; //TRUE;
+}
+int SynchronizedStatement::usesEH()
+{
+return TRUE;
+}
+int SynchronizedStatement::fallOffEnd()
+{
+return body ? body->fallOffEnd() : TRUE;
+}
+void SynchronizedStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("synchronized");
+if (exp)
+{   buf->writebyte('(');
+	exp->toCBuffer(buf, hgs);
+	buf->writebyte(')');
+}
+if (body)
+{
+	buf->writebyte(' ');
+	body->toCBuffer(buf, hgs);
+}
+}
+/******************************** WithStatement ***************************/
+WithStatement::WithStatement(Loc loc, Expression *exp, Statement *body)
+: Statement(loc)
+{
+this->exp = exp;
+this->body = body;
+wthis = NULL;
+}
+Statement *WithStatement::syntaxCopy()
+{
+WithStatement *s = new WithStatement(loc, exp->syntaxCopy(), body ? body->syntaxCopy() : NULL);
+return s;
+}
+Statement *WithStatement::semantic(Scope *sc)
+{   ScopeDsymbol *sym;
+Initializer *init;
+//printf("WithStatement::semantic()\n");
+exp = exp->semantic(sc);
+exp = resolveProperties(sc, exp);
+if (exp->op == TOKimport)
+{	ScopeExp *es = (ScopeExp *)exp;
+	sym = es->sds;
+}
+else if (exp->op == TOKtype)
+{	TypeExp *es = (TypeExp *)exp;
+	sym = es->type->toDsymbol(sc)->isScopeDsymbol();
+	if (!sym)
+	{   error("%s has no members", es->toChars());
+	    body = body->semantic(sc);
+	    return this;
+	}
+}
+else
+{	Type *t = exp->type;
+	assert(t);
+	t = t->toBasetype();
+	if (t->isClassHandle())
+	{
+	    init = new ExpInitializer(loc, exp);
+	    wthis = new VarDeclaration(loc, exp->type, Id::withSym, init);
+	    wthis->semantic(sc);
+	    sym = new WithScopeSymbol(this);
+	    sym->parent = sc->scopesym;
+	}
+	else if (t->ty == Tstruct)
+	{
+	    Expression *e = exp->addressOf(sc);
+	    init = new ExpInitializer(loc, e);
+	    wthis = new VarDeclaration(loc, e->type, Id::withSym, init);
+	    wthis->semantic(sc);
+	    sym = new WithScopeSymbol(this);
+	    sym->parent = sc->scopesym;
+	}
+	else
+	{   error("with expressions must be class objects, not '%s'", exp->type->toChars());
+	    return NULL;
+	}
+}
+sc = sc->push(sym);
+if (body)
+	body = body->semantic(sc);
+sc->pop();
+return this;
+}
+void WithStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("with (");
+exp->toCBuffer(buf, hgs);
+buf->writestring(")\n");
+if (body)
+	body->toCBuffer(buf, hgs);
+}
+int WithStatement::usesEH()
+{
+return body ? body->usesEH() : 0;
+}
+int WithStatement::fallOffEnd()
+{
+return body ? body->fallOffEnd() : TRUE;
+}
+/******************************** TryCatchStatement ***************************/
+TryCatchStatement::TryCatchStatement(Loc loc, Statement *body, Array *catches)
+: Statement(loc)
+{
+this->body = body;
+this->catches = catches;
+}
+Statement *TryCatchStatement::syntaxCopy()
+{
+Array *a = new Array();
+a->setDim(catches->dim);
+for (int i = 0; i < a->dim; i++)
+{   Catch *c;
+	c = (Catch *)catches->data[i];
+	c = c->syntaxCopy();
+	a->data[i] = c;
+}
+TryCatchStatement *s = new TryCatchStatement(loc, body->syntaxCopy(), a);
+return s;
+}
+Statement *TryCatchStatement::semantic(Scope *sc)
+{
+body = body->semanticScope(sc, NULL /*this*/, NULL);
+for (int i = 0; i < catches->dim; i++)
+{   Catch *c;
+	c = (Catch *)catches->data[i];
+	c->semantic(sc);
+	// Determine if current catch 'hides' any previous catches
+	for (int j = 0; j < i; j++)
+	{   Catch *cj = (Catch *)catches->data[j];
+	    char *si = c->loc.toChars();
+	    char *sj = cj->loc.toChars();
+	    if (c->type->toBasetype()->implicitConvTo(cj->type->toBasetype()))
+		error("catch at %s hides catch at %s", sj, si);
+	}
+}
+return this;
+}
+int TryCatchStatement::hasBreak()
+{
+return FALSE; //TRUE;
+}
+int TryCatchStatement::usesEH()
+{
+return TRUE;
+}
+int TryCatchStatement::fallOffEnd()
+{
+int result = FALSE;
+if (body)
+	result = body->fallOffEnd();
+for (int i = 0; i < catches->dim; i++)
+{   Catch *c;
+	c = (Catch *)catches->data[i];
+	if (c->handler)
+	    result |= c->handler->fallOffEnd();
+}
+return result;
+}
+void TryCatchStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("try");
+buf->writenl();
+if (body)
+body->toCBuffer(buf, hgs);
+int i;
+for (i = 0; i < catches->dim; i++)
+{
+Catch *c = (Catch *)catches->data[i];
+c->toCBuffer(buf, hgs);
+}
+}
+/******************************** Catch ***************************/
+Catch::Catch(Loc loc, Type *t, Identifier *id, Statement *handler)
+{
+//printf("Catch(%s, loc = %s)\n", id->toChars(), loc.toChars());
+this->loc = loc;
+this->type = t;
+this->ident = id;
+this->handler = handler;
+var = NULL;
+}
+Catch *Catch::syntaxCopy()
+{
+Catch *c = new Catch(loc,
+	(type ? type->syntaxCopy() : NULL),
+	ident,
+	(handler ? handler->syntaxCopy() : NULL));
+return c;
+}
+void Catch::semantic(Scope *sc)
+{   ScopeDsymbol *sym;
+//printf("Catch::semantic(%s)\n", ident->toChars());
+#ifndef IN_GCC
+if (sc->tf)
+{
+	/* This is because the _d_local_unwind() gets the stack munged
+	 * up on this. The workaround is to place any try-catches into
+	 * a separate function, and call that.
+	 * To fix, have the compiler automatically convert the finally
+	 * body into a nested function.
+	 */
+	error(loc, "cannot put catch statement inside finally block");
+}
+#endif
+sym = new ScopeDsymbol();
+sym->parent = sc->scopesym;
+sc = sc->push(sym);
+if (!type)
+	type = new TypeIdentifier(0, Id::Object);
+type = type->semantic(loc, sc);
+if (!type->toBasetype()->isClassHandle())
+	error("can only catch class objects, not '%s'", type->toChars());
+else if (ident)
+{
+	var = new VarDeclaration(loc, type, ident, NULL);
+	var->parent = sc->parent;
+	sc->insert(var);
+}
+handler = handler->semantic(sc);
+sc->pop();
+}
+void Catch::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("catch");
+if (type)
+{   buf->writebyte('(');
+	type->toCBuffer(buf, ident, hgs);
+buf->writebyte(')');
+}
+buf->writenl();
+buf->writebyte('{');
+buf->writenl();
+handler->toCBuffer(buf, hgs);
+buf->writebyte('}');
+buf->writenl();
+}
+/****************************** TryFinallyStatement ***************************/
+TryFinallyStatement::TryFinallyStatement(Loc loc, Statement *body, Statement *finalbody)
+: Statement(loc)
+{
+this->body = body;
+this->finalbody = finalbody;
+}
+Statement *TryFinallyStatement::syntaxCopy()
+{
+TryFinallyStatement *s = new TryFinallyStatement(loc,
+	body->syntaxCopy(), finalbody->syntaxCopy());
+return s;
+}
+Statement *TryFinallyStatement::semantic(Scope *sc)
+{
+//printf("TryFinallyStatement::semantic()\n");
+body = body->semantic(sc);
+sc = sc->push();
+sc->tf = this;
+sc->sbreak = NULL;
+sc->scontinue = NULL;	// no break or continue out of finally block
+finalbody = finalbody->semantic(sc);
+sc->pop();
+return this;
+}
+void TryFinallyStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->printf("try\n{\n");
+body->toCBuffer(buf, hgs);
+buf->printf("}\nfinally\n{\n");
+finalbody->toCBuffer(buf, hgs);
+buf->writeByte('}');
+buf->writenl();
+}
+int TryFinallyStatement::hasBreak()
+{
+return FALSE; //TRUE;
+}
+int TryFinallyStatement::hasContinue()
+{
+return FALSE; //TRUE;
+}
+int TryFinallyStatement::usesEH()
+{
+return TRUE;
+}
+int TryFinallyStatement::fallOffEnd()
+{   int result;
+result = body->fallOffEnd();
+//    if (finalbody)
+//	result = finalbody->fallOffEnd();
+return result;
+}
+/****************************** OnScopeStatement ***************************/
+OnScopeStatement::OnScopeStatement(Loc loc, TOK tok, Statement *statement)
+: Statement(loc)
+{
+this->tok = tok;
+this->statement = statement;
+}
+Statement *OnScopeStatement::syntaxCopy()
+{
+OnScopeStatement *s = new OnScopeStatement(loc,
+	tok, statement->syntaxCopy());
+return s;
+}
+Statement *OnScopeStatement::semantic(Scope *sc)
+{
+/* semantic is called on results of scopeCode() */
+return this;
+}
+void OnScopeStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(Token::toChars(tok));
+buf->writebyte(' ');
+statement->toCBuffer(buf, hgs);
+}
+int OnScopeStatement::usesEH()
+{
+return (tok != TOKon_scope_success);
+}
+void OnScopeStatement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally)
+{
+//printf("OnScopeStatement::scopeCode()\n");
+//print();
+*sentry = NULL;
+*sexception = NULL;
+*sfinally = NULL;
+switch (tok)
+{
+	case TOKon_scope_exit:
+	    *sfinally = statement;
+	    break;
+	case TOKon_scope_failure:
+	    *sexception = statement;
+	    break;
+	case TOKon_scope_success:
+	{
+	    /* Create:
+	     *	sentry:   int x = 0;
+	     *	sexception:    x = 1;
+	     *	sfinally: if (!x) statement;
+	     */
+	    static int num;
+	    char name[5 + sizeof(num) * 3 + 1];
+	    sprintf(name, "__osf%d", ++num);
+	    Identifier *id = Lexer::idPool(name);
+	    ExpInitializer *ie = new ExpInitializer(loc, new IntegerExp(0));
+	    VarDeclaration *v = new VarDeclaration(loc, Type::tint32, id, ie);
+	    *sentry = new DeclarationStatement(loc, v);
+	    Expression *e = new IntegerExp(1);
+	    e = new AssignExp(0, new VarExp(0, v), e);
+	    *sexception = new ExpStatement(0, e);
+	    e = new VarExp(0, v);
+	    e = new NotExp(0, e);
+	    *sfinally = new IfStatement(0, NULL, e, statement, NULL);
+	    break;
+	}
+	default:
+	    assert(0);
+}
+}
+/******************************** ThrowStatement ***************************/
+ThrowStatement::ThrowStatement(Loc loc, Expression *exp)
+: Statement(loc)
+{
+this->exp = exp;
+}
+Statement *ThrowStatement::syntaxCopy()
+{
+ThrowStatement *s = new ThrowStatement(loc, exp->syntaxCopy());
+return s;
+}
+Statement *ThrowStatement::semantic(Scope *sc)
+{
+//printf("ThrowStatement::semantic()\n");
+FuncDeclaration *fd = sc->parent->isFuncDeclaration();
+fd->hasReturnExp |= 2;
+if (sc->incontract)
+	error("Throw statements cannot be in contracts");
+exp = exp->semantic(sc);
+exp = resolveProperties(sc, exp);
+if (!exp->type->toBasetype()->isClassHandle())
+	error("can only throw class objects, not type %s", exp->type->toChars());
+return this;
+}
+int ThrowStatement::fallOffEnd()
+{
+return FALSE;
+}
+void ThrowStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->printf("throw ");
+exp->toCBuffer(buf, hgs);
+buf->writeByte(';');
+buf->writenl();
+}
+/******************************** VolatileStatement **************************/
+VolatileStatement::VolatileStatement(Loc loc, Statement *statement)
+: Statement(loc)
+{
+this->statement = statement;
+}
+Statement *VolatileStatement::syntaxCopy()
+{
+VolatileStatement *s = new VolatileStatement(loc,
+		statement ? statement->syntaxCopy() : NULL);
+return s;
+}
+Statement *VolatileStatement::semantic(Scope *sc)
+{
+statement = statement ? statement->semantic(sc) : NULL;
+return this;
+}
+Statements *VolatileStatement::flatten(Scope *sc)
+{
+Statements *a;
+a = statement ? statement->flatten(sc) : NULL;
+if (a)
+{	for (int i = 0; i < a->dim; i++)
+	{   Statement *s = (Statement *)a->data[i];
+	    s = new VolatileStatement(loc, s);
+	    a->data[i] = s;
+	}
+}
+return a;
+}
+int VolatileStatement::fallOffEnd()
+{
+return statement ? statement->fallOffEnd() : TRUE;
+}
+void VolatileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("volatile");
+if (statement)
+{   if (statement->isScopeStatement())
+buf->writenl();
+else
+buf->writebyte(' ');
+statement->toCBuffer(buf, hgs);
+}
+}
+/******************************** GotoStatement ***************************/
+GotoStatement::GotoStatement(Loc loc, Identifier *ident)
+: Statement(loc)
+{
+this->ident = ident;
+this->label = NULL;
+this->tf = NULL;
+}
+Statement *GotoStatement::syntaxCopy()
+{
+GotoStatement *s = new GotoStatement(loc, ident);
+return s;
+}
+Statement *GotoStatement::semantic(Scope *sc)
+{   FuncDeclaration *fd = sc->parent->isFuncDeclaration();
+//printf("GotoStatement::semantic()\n");
+tf = sc->tf;
+label = fd->searchLabel(ident);
+if (!label->statement && sc->fes)
+{
+	/* Either the goto label is forward referenced or it
+	 * is in the function that the enclosing foreach is in.
+	 * Can't know yet, so wrap the goto in a compound statement
+	 * so we can patch it later, and add it to a 'look at this later'
+	 * list.
+	 */
+	Statements *a = new Statements();
+	Statement *s;
+	a->push(this);
+	s = new CompoundStatement(loc, a);
+	sc->fes->gotos.push(s);		// 'look at this later' list
+	return s;
+}
+if (label->statement && label->statement->tf != sc->tf)
+	error("cannot goto in or out of finally block");
+return this;
+}
+int GotoStatement::fallOffEnd()
+{
+return FALSE;
+}
+void GotoStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring("goto ");
+buf->writestring(ident->toChars());
+buf->writebyte(';');
+buf->writenl();
+}
+/******************************** LabelStatement ***************************/
+LabelStatement::LabelStatement(Loc loc, Identifier *ident, Statement *statement)
+: Statement(loc)
+{
+this->ident = ident;
+this->statement = statement;
+this->tf = NULL;
+this->lblock = NULL;
+this->isReturnLabel = 0;
+}
+Statement *LabelStatement::syntaxCopy()
+{
+LabelStatement *s = new LabelStatement(loc, ident, statement->syntaxCopy());
+return s;
+}
+Statement *LabelStatement::semantic(Scope *sc)
+{   LabelDsymbol *ls;
+FuncDeclaration *fd = sc->parent->isFuncDeclaration();
+//printf("LabelStatement::semantic()\n");
+ls = fd->searchLabel(ident);
+if (ls->statement)
+	error("Label '%s' already defined", ls->toChars());
+else
+	ls->statement = this;
+tf = sc->tf;
+sc = sc->push();
+sc->scopesym = sc->enclosing->scopesym;
+sc->callSuper |= CSXlabel;
+sc->slabel = this;
+if (statement)
+	statement = statement->semantic(sc);
+sc->pop();
+return this;
+}
+Statements *LabelStatement::flatten(Scope *sc)
+{
+Statements *a = NULL;
+if (statement)
+{
+	a = statement->flatten(sc);
+	if (a)
+	{
+	    if (!a->dim)
+	    {
+		a->push(new ExpStatement(loc, NULL));
+	    }
+	    Statement *s = (Statement *)a->data[0];
+	    s = new LabelStatement(loc, ident, s);
+	    a->data[0] = s;
+	}
+}
+return a;
+}
+int LabelStatement::usesEH()
+{
+return statement ? statement->usesEH() : FALSE;
+}
+int LabelStatement::fallOffEnd()
+{
+return statement ? statement->fallOffEnd() : TRUE;
+}
+int LabelStatement::comeFrom()
+{
+//printf("LabelStatement::comeFrom()\n");
+return TRUE;
+}
+void LabelStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+buf->writestring(ident->toChars());
+buf->writebyte(':');
+buf->writenl();
+if (statement)
+statement->toCBuffer(buf, hgs);
+}
+/******************************** LabelDsymbol ***************************/
+LabelDsymbol::LabelDsymbol(Identifier *ident)
+	: Dsymbol(ident)
+{
+statement = NULL;
+#if IN_GCC
+asmLabelNum = 0;
+#endif
+}
+LabelDsymbol *LabelDsymbol::isLabel()		// is this a LabelDsymbol()?
+{
+return this;
+}

Mercurial > projects > ldc

comparison dmd/statement.c @ 1:c53b6e3fe49a trunk