Mercurial > projects > ldc
view dmd2/scope.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) 1999-2005 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 "mars.h" #include "init.h" #include "identifier.h" #include "attrib.h" #include "dsymbol.h" #include "scope.h" #include "declaration.h" #include "aggregate.h" #include "module.h" #include "id.h" Scope *Scope::freelist = NULL; void *Scope::operator new(size_t size) { if (freelist) { Scope *s = freelist; freelist = s->enclosing; //printf("freelist %p\n", s); assert(s->flags & SCOPEfree); s->flags &= ~SCOPEfree; return s; } void *p = ::operator new(size); //printf("new %p\n", p); return p; } Scope::Scope() { // Create root scope //printf("Scope::Scope() %p\n", this); this->module = NULL; this->scopesym = NULL; this->sd = NULL; this->enclosing = NULL; this->parent = NULL; this->sw = NULL; this->tf = NULL; this->tfOfTry = NULL; this->tinst = NULL; this->sbreak = NULL; this->scontinue = NULL; this->fes = NULL; this->structalign = global.structalign; this->func = NULL; this->slabel = NULL; this->linkage = LINKd; this->protection = PROTpublic; this->explicitProtection = 0; this->stc = 0; this->offset = 0; this->inunion = 0; this->incontract = 0; this->nofree = 0; this->noctor = 0; this->noaccesscheck = 0; this->intypeof = 0; this->parameterSpecialization = 0; this->callSuper = 0; this->flags = 0; this->anonAgg = NULL; this->lastdc = NULL; this->lastoffset = 0; this->docbuf = NULL; } Scope::Scope(Scope *enclosing) { //printf("Scope::Scope(enclosing = %p) %p\n", enclosing, this); assert(!(enclosing->flags & SCOPEfree)); this->module = enclosing->module; this->func = enclosing->func; this->parent = enclosing->parent; this->scopesym = NULL; this->sd = NULL; this->sw = enclosing->sw; this->tf = enclosing->tf; this->tfOfTry = enclosing->tfOfTry; this->tinst = enclosing->tinst; this->sbreak = enclosing->sbreak; this->scontinue = enclosing->scontinue; this->fes = enclosing->fes; this->structalign = enclosing->structalign; this->enclosing = enclosing; #ifdef DEBUG if (enclosing->enclosing) assert(!(enclosing->enclosing->flags & SCOPEfree)); if (this == enclosing->enclosing) { printf("this = %p, enclosing = %p, enclosing->enclosing = %p\n", this, enclosing, enclosing->enclosing); } assert(this != enclosing->enclosing); #endif this->slabel = NULL; this->linkage = enclosing->linkage; this->protection = enclosing->protection; this->explicitProtection = enclosing->explicitProtection; this->stc = enclosing->stc; this->offset = 0; this->inunion = enclosing->inunion; this->incontract = enclosing->incontract; this->nofree = 0; this->noctor = enclosing->noctor; this->noaccesscheck = enclosing->noaccesscheck; this->intypeof = enclosing->intypeof; this->parameterSpecialization = enclosing->parameterSpecialization; this->callSuper = enclosing->callSuper; this->flags = 0; this->anonAgg = NULL; this->lastdc = NULL; this->lastoffset = 0; this->docbuf = enclosing->docbuf; assert(this != enclosing); } Scope *Scope::createGlobal(Module *module) { Scope *sc; sc = new Scope(); sc->module = module; sc->scopesym = new ScopeDsymbol(); sc->scopesym->symtab = new DsymbolTable(); // Add top level package as member of this global scope Dsymbol *m = module; while (m->parent) m = m->parent; m->addMember(NULL, sc->scopesym, 1); m->parent = NULL; // got changed by addMember() // Create the module scope underneath the global scope sc = sc->push(module); sc->parent = module; return sc; } Scope *Scope::push() { //printf("Scope::push()\n"); Scope *s = new Scope(this); assert(this != s); return s; } Scope *Scope::push(ScopeDsymbol *ss) { //printf("Scope::push(%s)\n", ss->toChars()); Scope *s = push(); s->scopesym = ss; return s; } Scope *Scope::pop() { //printf("Scope::pop() %p nofree = %d\n", this, nofree); Scope *enc = enclosing; if (enclosing) enclosing->callSuper |= callSuper; if (!nofree) { enclosing = freelist; freelist = this; flags |= SCOPEfree; } return enc; } void Scope::mergeCallSuper(Loc loc, unsigned cs) { // This does a primitive flow analysis to support the restrictions // regarding when and how constructors can appear. // It merges the results of two paths. // The two paths are callSuper and cs; the result is merged into callSuper. if (cs != callSuper) { int a; int b; callSuper |= cs & (CSXany_ctor | CSXlabel); if (cs & CSXreturn) { } else if (callSuper & CSXreturn) { callSuper = cs | (callSuper & (CSXany_ctor | CSXlabel)); } else { a = (cs & (CSXthis_ctor | CSXsuper_ctor)) != 0; b = (callSuper & (CSXthis_ctor | CSXsuper_ctor)) != 0; if (a != b) error(loc, "one path skips constructor"); callSuper |= cs; } } } Dsymbol *Scope::search(Loc loc, Identifier *ident, Dsymbol **pscopesym) { Dsymbol *s; Scope *sc; //printf("Scope::search(%p, '%s')\n", this, ident->toChars()); if (ident == Id::empty) { // Look for module scope for (sc = this; sc; sc = sc->enclosing) { assert(sc != sc->enclosing); if (sc->scopesym) { s = sc->scopesym->isModule(); if (s) { //printf("\tfound %s.%s\n", s->parent ? s->parent->toChars() : "", s->toChars()); if (pscopesym) *pscopesym = sc->scopesym; return s; } } } return NULL; } for (sc = this; sc; sc = sc->enclosing) { assert(sc != sc->enclosing); if (sc->scopesym) { //printf("\tlooking in scopesym '%s', kind = '%s'\n", sc->scopesym->toChars(), sc->scopesym->kind()); s = sc->scopesym->search(loc, ident, 0); if (s) { if ((global.params.warnings || global.params.Dversion > 1) && ident == Id::length && sc->scopesym->isArrayScopeSymbol() && sc->enclosing && sc->enclosing->search(loc, ident, NULL)) { // WTF ? if (global.params.warnings) fprintf(stdmsg, "warning - "); error(s->loc, "array 'length' hides other 'length' name in outer scope"); } //printf("\tfound %s.%s, kind = '%s'\n", s->parent ? s->parent->toChars() : "", s->toChars(), s->kind()); if (pscopesym) *pscopesym = sc->scopesym; return s; } } } return NULL; } Dsymbol *Scope::insert(Dsymbol *s) { Scope *sc; for (sc = this; sc; sc = sc->enclosing) { //printf("\tsc = %p\n", sc); if (sc->scopesym) { //printf("\t\tsc->scopesym = %p\n", sc->scopesym); if (!sc->scopesym->symtab) sc->scopesym->symtab = new DsymbolTable(); return sc->scopesym->symtab->insert(s); } } assert(0); return NULL; } /******************************************** * Search enclosing scopes for ClassDeclaration. */ ClassDeclaration *Scope::getClassScope() { Scope *sc; for (sc = this; sc; sc = sc->enclosing) { ClassDeclaration *cd; if (sc->scopesym) { cd = sc->scopesym->isClassDeclaration(); if (cd) return cd; } } return NULL; } /******************************************** * Search enclosing scopes for ClassDeclaration. */ AggregateDeclaration *Scope::getStructClassScope() { Scope *sc; for (sc = this; sc; sc = sc->enclosing) { AggregateDeclaration *ad; if (sc->scopesym) { ad = sc->scopesym->isClassDeclaration(); if (ad) return ad; else { ad = sc->scopesym->isStructDeclaration(); if (ad) return ad; } } } return NULL; } /******************************************* * For TemplateDeclarations, we need to remember the Scope * where it was declared. So mark the Scope as not * to be free'd. */ void Scope::setNoFree() { Scope *sc; //int i = 0; //printf("Scope::setNoFree(this = %p)\n", this); for (sc = this; sc; sc = sc->enclosing) { //printf("\tsc = %p\n", sc); sc->nofree = 1; assert(!(flags & SCOPEfree)); //assert(sc != sc->enclosing); //assert(!sc->enclosing || sc != sc->enclosing->enclosing); //if (++i == 10) //assert(0); } }