Mercurial > projects > ldc
view dmd2/enum.c @ 1112:829ac3f30103
Updating revisions.pl.in:
- Change the way the LLVM SVN revision is detected, using `svn info` instead
of `svnversion`. This speeds it up significantly on my machine (especially
when the LLVM SVN checkout isn't in disk cache).
- Add "last changed date" to SVN checkouts too, not just unpacked tarballs
- No longer rely on SVN revision to detect release vs trunk checkouts, treat
release checkout the same as unpacked release tarball. (Except for date
determination, which uses SVN date instead of filesystem date)
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Fri, 13 Mar 2009 16:18:01 +0100 |
parents | f04dde6e882c |
children | 638d16625da2 |
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// Copyright (c) 1999-2008 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" #include "id.h" #include "expression.h" #include "module.h" #include "declaration.h" /********************************* EnumDeclaration ****************************/ EnumDeclaration::EnumDeclaration(Loc loc, Identifier *id, Type *memtype) : ScopeDsymbol(id) { this->loc = loc; type = new TypeEnum(this); this->memtype = memtype; maxval = NULL; minval = NULL; defaultval = NULL; sinit = NULL; scope = NULL; isdeprecated = 0; } 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) { Type *t; Scope *sce; //printf("EnumDeclaration::semantic(sd = %p, '%s') %s\n", sc->scopesym, sc->scopesym->toChars(), toChars()); //printf("EnumDeclaration::semantic() %s\n", toChars()); if (!members) // enum ident; return; if (!memtype && !isAnonymous()) { // Set memtype if we can to reduce fwd reference errors memtype = Type::tint32; // case 1) enum ident { ... } } if (symtab) // if already done { if (!scope) return; // semantic() already completed } else symtab = new DsymbolTable(); Scope *scx = NULL; if (scope) { sc = scope; scx = scope; // save so we don't make redundant copies scope = NULL; } if (sc->stc & STCdeprecated) isdeprecated = 1; parent = sc->parent; /* The separate, and distinct, cases are: * 1. enum { ... } * 2. enum : memtype { ... } * 3. enum ident { ... } * 4. enum ident : memtype { ... } */ if (memtype) { 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 || !sym->members || !sym->symtab || sym->scope) { // memtype is forward referenced, so try again later scope = scx ? scx : new Scope(*sc); scope->setNoFree(); scope->module->addDeferredSemantic(this); printf("\tdeferring %s\n", toChars()); return; } } #if 0 // Decided to abandon this restriction for D 2.0 if (!memtype->isintegral()) { error("base type must be of integral type, not %s", memtype->toChars()); memtype = Type::tint32; } #endif } type = type->semantic(loc, sc); if (isAnonymous()) sce = sc; else { sce = sc->push(this); sce->parent = this; } if (members->dim == 0) error("enum %s must have at least one member", toChars()); int first = 1; Expression *elast = NULL; for (int 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()); if (em->type) em->type = em->type->semantic(em->loc, sce); e = em->value; if (e) { assert(e->dyncast() == DYNCAST_EXPRESSION); e = e->semantic(sce); e = e->optimize(WANTvalue | WANTinterpret); if (memtype) { e = e->implicitCastTo(sce, memtype); e = e->optimize(WANTvalue | WANTinterpret); if (!isAnonymous()) e = e->castTo(sce, type); t = memtype; } else if (em->type) { e = e->implicitCastTo(sce, em->type); e = e->optimize(WANTvalue | WANTinterpret); assert(isAnonymous()); t = e->type; } else t = e->type; } else if (first) { if (memtype) t = memtype; else if (em->type) t = em->type; else t = Type::tint32; e = new IntegerExp(em->loc, 0, Type::tint32); e = e->implicitCastTo(sce, t); e = e->optimize(WANTvalue | WANTinterpret); if (!isAnonymous()) e = e->castTo(sce, type); } else { // Set value to (elast + 1). // But first check that (elast != t.max) assert(elast); e = new EqualExp(TOKequal, em->loc, elast, t->getProperty(0, Id::max)); e = e->semantic(sce); e = e->optimize(WANTvalue | WANTinterpret); if (e->toInteger()) error("overflow of enum value %s", elast->toChars()); // Now set e to (elast + 1) e = new AddExp(em->loc, elast, new IntegerExp(em->loc, 1, Type::tint32)); e = e->semantic(sce); e = e->castTo(sce, elast->type); e = e->optimize(WANTvalue | WANTinterpret); } elast = e; em->value = e; // Add to symbol table only after evaluating 'value' if (isAnonymous()) { /* Anonymous enum members get added to enclosing scope. */ for (Scope *scx = sce; 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); /* Compute .min, .max and .default values. * If enum doesn't have a name, we can never identify the enum type, * so there is no purpose for a .min, .max or .default */ if (!isAnonymous()) { if (first) { defaultval = e; minval = e; maxval = e; } else { Expression *ec; /* In order to work successfully with UDTs, * build expressions to do the comparisons, * and let the semantic analyzer and constant * folder give us the result. */ // Compute if(e < minval) ec = new CmpExp(TOKlt, em->loc, e, minval); ec = ec->semantic(sce); ec = ec->optimize(WANTvalue | WANTinterpret); if (ec->toInteger()) minval = e; ec = new CmpExp(TOKgt, em->loc, e, maxval); ec = ec->semantic(sce); ec = ec->optimize(WANTvalue | WANTinterpret); if (ec->toInteger()) maxval = e; } } first = 0; } //printf("defaultval = %lld\n", defaultval); //if (defaultval) printf("defaultval: %s %s\n", defaultval->toChars(), defaultval->type->toChars()); if (sc != sce) 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; } const char *EnumDeclaration::kind() { return "enum"; } int EnumDeclaration::isDeprecated() { return isdeprecated; } Dsymbol *EnumDeclaration::search(Loc loc, Identifier *ident, int flags) { //printf("%s.EnumDeclaration::search('%s')\n", toChars(), ident->toChars()); if (scope) // Try one last time to resolve this enum semantic(scope); if (!members || !symtab || scope) { error("is forward referenced when looking for '%s'", ident->toChars()); //*(char*)0=0; return NULL; } Dsymbol *s = ScopeDsymbol::search(loc, ident, flags); return s; } /********************************* EnumMember ****************************/ EnumMember::EnumMember(Loc loc, Identifier *id, Expression *value, Type *type) : Dsymbol(id) { this->value = value; this->type = type; this->loc = loc; } Dsymbol *EnumMember::syntaxCopy(Dsymbol *s) { Expression *e = NULL; if (value) e = value->syntaxCopy(); Type *t = NULL; if (type) t = type->syntaxCopy(); EnumMember *em; if (s) { em = (EnumMember *)s; em->loc = loc; em->value = e; em->type = t; } else em = new EnumMember(loc, ident, e, t); return em; } void EnumMember::toCBuffer(OutBuffer *buf, HdrGenState *hgs) { if (type) type->toCBuffer(buf, ident, hgs); else buf->writestring(ident->toChars()); if (value) { buf->writestring(" = "); value->toCBuffer(buf, hgs); } } const char *EnumMember::kind() { return "enum member"; }