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[svn r5] Initial commit. Most things are very rough.
This commit is contained in:
Tomas Lindquist Olsen
314
dmd/enum.c
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314
dmd/enum.c
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// Copyright (c) 1999-2006 by Digital Mars
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// All Rights Reserved
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// written by Walter Bright
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// http://www.digitalmars.com
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// License for redistribution is by either the Artistic License
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// in artistic.txt, or the GNU General Public License in gnu.txt.
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// See the included readme.txt for details.
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#include <stdio.h>
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#include <assert.h>
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#include "root.h"
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#include "enum.h"
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#include "mtype.h"
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#include "scope.h"
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/********************************* EnumDeclaration ****************************/
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EnumDeclaration::EnumDeclaration(Loc loc, Identifier *id, Type *memtype)
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: ScopeDsymbol(id)
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{
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this->loc = loc;
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type = new TypeEnum(this);
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this->memtype = memtype;
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maxval = 0;
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minval = 0;
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defaultval = 0;
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sinit = NULL;
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}
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Dsymbol *EnumDeclaration::syntaxCopy(Dsymbol *s)
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{
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Type *t = NULL;
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if (memtype)
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t = memtype->syntaxCopy();
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EnumDeclaration *ed;
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if (s)
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{ ed = (EnumDeclaration *)s;
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ed->memtype = t;
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}
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else
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ed = new EnumDeclaration(loc, ident, t);
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ScopeDsymbol::syntaxCopy(ed);
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return ed;
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}
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void EnumDeclaration::semantic(Scope *sc)
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{ int i;
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uinteger_t number;
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Type *t;
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Scope *sce;
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//printf("EnumDeclaration::semantic(sd = %p, '%s')\n", sc->scopesym, sc->scopesym->toChars());
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if (symtab) // if already done
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return;
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if (!memtype)
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memtype = Type::tint32;
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parent = sc->scopesym;
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memtype = memtype->semantic(loc, sc);
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/* Check to see if memtype is forward referenced
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*/
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if (memtype->ty == Tenum)
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{ EnumDeclaration *sym = (EnumDeclaration *)memtype->toDsymbol(sc);
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if (!sym->memtype)
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{
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error("base enum %s is forward referenced", sym->toChars());
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memtype = Type::tint32;
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}
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}
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if (!memtype->isintegral())
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{ error("base type must be of integral type, not %s", memtype->toChars());
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memtype = Type::tint32;
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}
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t = isAnonymous() ? memtype : type;
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symtab = new DsymbolTable();
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sce = sc->push(this);
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sce->parent = this;
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number = 0;
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if (!members) // enum ident;
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return;
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if (members->dim == 0)
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error("enum %s must have at least one member", toChars());
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int first = 1;
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for (i = 0; i < members->dim; i++)
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{
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EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember();
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Expression *e;
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if (!em)
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/* The e->semantic(sce) can insert other symbols, such as
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* template instances and function literals.
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*/
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continue;
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//printf("Enum member '%s'\n",em->toChars());
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e = em->value;
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if (e)
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{
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assert(e->dyncast() == DYNCAST_EXPRESSION);
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e = e->semantic(sce);
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e = e->optimize(WANTvalue);
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// Need to copy it because we're going to change the type
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e = e->copy();
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e = e->implicitCastTo(sc, memtype);
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e = e->optimize(WANTvalue);
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number = e->toInteger();
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e->type = t;
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}
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else
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{ // Default is the previous number plus 1
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// Check for overflow
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if (!first)
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{
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switch (t->toBasetype()->ty)
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{
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case Tbool:
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if (number == 2) goto Loverflow;
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break;
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case Tint8:
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if (number == 128) goto Loverflow;
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break;
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case Tchar:
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case Tuns8:
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if (number == 256) goto Loverflow;
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break;
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case Tint16:
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if (number == 0x8000) goto Loverflow;
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break;
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case Twchar:
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case Tuns16:
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if (number == 0x10000) goto Loverflow;
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break;
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case Tint32:
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if (number == 0x80000000) goto Loverflow;
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break;
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case Tdchar:
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case Tuns32:
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if (number == 0x100000000LL) goto Loverflow;
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break;
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case Tint64:
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if (number == 0x8000000000000000LL) goto Loverflow;
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break;
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case Tuns64:
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if (number == 0) goto Loverflow;
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break;
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Loverflow:
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error("overflow of enum value");
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break;
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default:
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assert(0);
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}
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}
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e = new IntegerExp(em->loc, number, t);
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}
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em->value = e;
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// Add to symbol table only after evaluating 'value'
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if (isAnonymous())
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{
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//sce->enclosing->insert(em);
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for (Scope *scx = sce->enclosing; scx; scx = scx->enclosing)
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{
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if (scx->scopesym)
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{
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if (!scx->scopesym->symtab)
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scx->scopesym->symtab = new DsymbolTable();
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em->addMember(sce, scx->scopesym, 1);
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break;
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}
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}
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}
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else
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em->addMember(sc, this, 1);
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if (first)
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{ first = 0;
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defaultval = number;
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minval = number;
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maxval = number;
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}
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else if (memtype->isunsigned())
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{
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if (number < minval)
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minval = number;
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if (number > maxval)
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maxval = number;
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}
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else
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{
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if ((sinteger_t)number < (sinteger_t)minval)
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minval = number;
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if ((sinteger_t)number > (sinteger_t)maxval)
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maxval = number;
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}
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number++;
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}
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//printf("defaultval = %lld\n", defaultval);
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sce->pop();
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//members->print();
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}
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int EnumDeclaration::oneMember(Dsymbol **ps)
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{
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if (isAnonymous())
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return Dsymbol::oneMembers(members, ps);
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return Dsymbol::oneMember(ps);
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}
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void EnumDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
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{ int i;
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buf->writestring("enum ");
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if (ident)
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{ buf->writestring(ident->toChars());
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buf->writeByte(' ');
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}
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if (memtype)
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{
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buf->writestring(": ");
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memtype->toCBuffer(buf, NULL, hgs);
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}
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if (!members)
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{
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buf->writeByte(';');
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buf->writenl();
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return;
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}
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buf->writenl();
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buf->writeByte('{');
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buf->writenl();
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for (i = 0; i < members->dim; i++)
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{
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EnumMember *em = ((Dsymbol *)members->data[i])->isEnumMember();
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if (!em)
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continue;
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//buf->writestring(" ");
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em->toCBuffer(buf, hgs);
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buf->writeByte(',');
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buf->writenl();
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}
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buf->writeByte('}');
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buf->writenl();
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}
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Type *EnumDeclaration::getType()
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{
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return type;
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}
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char *EnumDeclaration::kind()
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{
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return "enum";
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}
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/********************************* EnumMember ****************************/
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EnumMember::EnumMember(Loc loc, Identifier *id, Expression *value)
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: Dsymbol(id)
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{
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this->value = value;
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this->loc = loc;
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}
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Dsymbol *EnumMember::syntaxCopy(Dsymbol *s)
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{
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Expression *e = NULL;
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if (value)
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e = value->syntaxCopy();
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EnumMember *em;
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if (s)
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{ em = (EnumMember *)s;
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em->loc = loc;
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em->value = e;
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}
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else
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em = new EnumMember(loc, ident, e);
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return em;
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}
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void EnumMember::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
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{
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buf->writestring(ident->toChars());
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if (value)
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{
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buf->writestring(" = ");
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value->toCBuffer(buf, hgs);
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}
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}
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char *EnumMember::kind()
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{
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return "enum member";
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}
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