--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dmd/enum.c	Sat Sep 01 21:43:27 2007 +0200
@@ -0,0 +1,314 @@
+
+// Copyright (c) 1999-2006 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 <assert.h>
+
+#include "root.h"
+#include "enum.h"
+#include "mtype.h"
+#include "scope.h"
+
+/********************************* EnumDeclaration ****************************/
+
+EnumDeclaration::EnumDeclaration(Loc loc, Identifier *id, Type *memtype)
+    : ScopeDsymbol(id)
+{
+    this->loc = loc;
+    type = new TypeEnum(this);
+    this->memtype = memtype;
+    maxval = 0;
+    minval = 0;
+    defaultval = 0;
+    sinit = NULL;
+}
+
+Dsymbol *EnumDeclaration::syntaxCopy(Dsymbol *s)
+{
+    Type *t = NULL;
+    if (memtype)
+	t = memtype->syntaxCopy();
+
+    EnumDeclaration *ed;
+    if (s)
+    {	ed = (EnumDeclaration *)s;
+	ed->memtype = t;
+    }
+    else
+	ed = new EnumDeclaration(loc, ident, t);
+    ScopeDsymbol::syntaxCopy(ed);
+    return ed;
+}
+
+void EnumDeclaration::semantic(Scope *sc)
+{   int i;
+    uinteger_t number;
+    Type *t;
+    Scope *sce;
+
+    //printf("EnumDeclaration::semantic(sd = %p, '%s')\n", sc->scopesym, sc->scopesym->toChars());
+    if (symtab)			// if already done
+	return;
+    if (!memtype)
+	memtype = Type::tint32;
+    parent = sc->scopesym;
+    memtype = memtype->semantic(loc, sc);
+
+    /* Check to see if memtype is forward referenced
+     */
+    if (memtype->ty == Tenum)
+    {	EnumDeclaration *sym = (EnumDeclaration *)memtype->toDsymbol(sc);
+	if (!sym->memtype)
+	{
+	    error("base enum %s is forward referenced", sym->toChars());
+	    memtype = Type::tint32;
+	}
+    }
+
+    if (!memtype->isintegral())
+    {	error("base type must be of integral type, not %s", memtype->toChars());
+	memtype = Type::tint32;
+    }
+
+    t = isAnonymous() ? memtype : type;
+    symtab = new DsymbolTable();
+    sce = sc->push(this);
+    sce->parent = this;
+    number = 0;
+    if (!members)		// enum ident;
+	return;
+    if (members->dim == 0)
+	error("enum %s must have at least one member", toChars());
+    int first = 1;
+    for (i = 0; i < members->dim; i++)
+    {
+	EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember();
+	Expression *e;
+
+	if (!em)
+	    /* The e->semantic(sce) can insert other symbols, such as
+	     * template instances and function literals.
+	     */
+	    continue;
+
+	//printf("Enum member '%s'\n",em->toChars());
+	e = em->value;
+	if (e)
+	{
+	    assert(e->dyncast() == DYNCAST_EXPRESSION);
+	    e = e->semantic(sce);
+	    e = e->optimize(WANTvalue);
+	    // Need to copy it because we're going to change the type
+	    e = e->copy();
+	    e = e->implicitCastTo(sc, memtype);
+	    e = e->optimize(WANTvalue);
+	    number = e->toInteger();
+	    e->type = t;
+	}
+	else
+	{   // Default is the previous number plus 1
+
+	    // Check for overflow
+	    if (!first)
+	    {
+		switch (t->toBasetype()->ty)
+		{
+		    case Tbool:
+			if (number == 2)	goto Loverflow;
+			break;
+
+		    case Tint8:
+			if (number == 128) goto Loverflow;
+			break;
+
+		    case Tchar:
+		    case Tuns8:
+			if (number == 256) goto Loverflow;
+			break;
+
+		    case Tint16:
+			if (number == 0x8000) goto Loverflow;
+			break;
+
+		    case Twchar:
+		    case Tuns16:
+			if (number == 0x10000) goto Loverflow;
+			break;
+
+		    case Tint32:
+			if (number == 0x80000000) goto Loverflow;
+			break;
+
+		    case Tdchar:
+		    case Tuns32:
+			if (number == 0x100000000LL) goto Loverflow;
+			break;
+
+		    case Tint64:
+			if (number == 0x8000000000000000LL) goto Loverflow;
+			break;
+
+		    case Tuns64:
+			if (number == 0) goto Loverflow;
+			break;
+
+		    Loverflow:
+			error("overflow of enum value");
+			break;
+
+		    default:
+			assert(0);
+		}
+	    }
+	    e = new IntegerExp(em->loc, number, t);
+	}
+	em->value = e;
+
+	// Add to symbol table only after evaluating 'value'
+	if (isAnonymous())
+	{
+	    //sce->enclosing->insert(em);
+	    for (Scope *scx = sce->enclosing; scx; scx = scx->enclosing)
+	    {
+		if (scx->scopesym)
+		{
+		    if (!scx->scopesym->symtab)
+			scx->scopesym->symtab = new DsymbolTable();
+		    em->addMember(sce, scx->scopesym, 1);
+		    break;
+		}
+	    }
+	}
+	else
+	    em->addMember(sc, this, 1);
+
+	if (first)
+	{   first = 0;
+	    defaultval = number;
+	    minval = number;
+	    maxval = number;
+	}
+	else if (memtype->isunsigned())
+	{
+	    if (number < minval)
+		minval = number;
+	    if (number > maxval)
+		maxval = number;
+	}
+	else
+	{
+	    if ((sinteger_t)number < (sinteger_t)minval)
+		minval = number;
+	    if ((sinteger_t)number > (sinteger_t)maxval)
+		maxval = number;
+	}
+
+	number++;
+    }
+    //printf("defaultval = %lld\n", defaultval);
+
+    sce->pop();
+    //members->print();
+}
+
+int EnumDeclaration::oneMember(Dsymbol **ps)
+{
+    if (isAnonymous())
+	return Dsymbol::oneMembers(members, ps);
+    return Dsymbol::oneMember(ps);
+}
+
+void EnumDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{   int i;
+
+    buf->writestring("enum ");
+    if (ident)
+    {	buf->writestring(ident->toChars());
+	buf->writeByte(' ');
+    }
+    if (memtype)
+    {
+	buf->writestring(": ");
+	memtype->toCBuffer(buf, NULL, hgs);
+    }
+    if (!members)
+    {
+	buf->writeByte(';');
+	buf->writenl();
+	return;
+    }
+    buf->writenl();
+    buf->writeByte('{');
+    buf->writenl();
+    for (i = 0; i < members->dim; i++)
+    {
+	EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember();
+	if (!em)
+	    continue;
+	//buf->writestring("    ");
+	em->toCBuffer(buf, hgs);
+	buf->writeByte(',');
+	buf->writenl();
+    }
+    buf->writeByte('}');
+    buf->writenl();
+}
+
+Type *EnumDeclaration::getType()
+{
+    return type;
+}
+
+char *EnumDeclaration::kind()
+{
+    return "enum";
+}
+
+/********************************* EnumMember ****************************/
+
+EnumMember::EnumMember(Loc loc, Identifier *id, Expression *value)
+    : Dsymbol(id)
+{
+    this->value = value;
+    this->loc = loc;
+}
+
+Dsymbol *EnumMember::syntaxCopy(Dsymbol *s)
+{
+    Expression *e = NULL;
+    if (value)
+	e = value->syntaxCopy();
+
+    EnumMember *em;
+    if (s)
+    {	em = (EnumMember *)s;
+	em->loc = loc;
+	em->value = e;
+    }
+    else
+	em = new EnumMember(loc, ident, e);
+    return em;
+}
+
+void EnumMember::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+    buf->writestring(ident->toChars());
+    if (value)
+    {
+	buf->writestring(" = ");
+	value->toCBuffer(buf, hgs);
+    }
+}
+
+char *EnumMember::kind()
+{
+    return "enum member";
+}
+
+