5bbb3c8ad9
productions (except the already broken ObjC cases like @class X,Y;) in the parser that can produce more than one Decl return a DeclGroup instead of a Decl, etc. This allows elimination of the Decl::NextDeclarator field, and exposes various clients that should look at all decls in a group, but which were only looking at one (such as the dumper, printer, etc). These have been fixed. Still TODO: 1) there are some FIXME's in the code about potentially using DeclGroup for better location info. 2) ParseObjCAtDirectives should return a DeclGroup due to @class etc. 3) I'm not sure what is going on with StmtIterator.cpp, or if it can be radically simplified now. 4) I put a truly horrible hack in ParseTemplate.cpp. I plan to bring up #3/4 on the mailing list, but don't plan to tackle #1/2 in the short term. llvm-svn: 68002
75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
//===--- DeclGroup.cpp - Classes for representing groups of Decls -*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the DeclGroup and DeclGroupRef classes.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/DeclGroup.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/ASTContext.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Bitcode/Serialize.h"
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#include "llvm/Bitcode/Deserialize.h"
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using namespace clang;
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DeclGroup* DeclGroup::Create(ASTContext &C, Decl **Decls, unsigned NumDecls) {
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assert(NumDecls > 1 && "Invalid DeclGroup");
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unsigned Size = sizeof(DeclGroup) + sizeof(Decl*) * NumDecls;
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void* Mem = C.Allocate(Size, llvm::AlignOf<DeclGroup>::Alignment);
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new (Mem) DeclGroup(NumDecls, Decls);
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return static_cast<DeclGroup*>(Mem);
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}
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/// Emit - Serialize a DeclGroup to Bitcode.
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void DeclGroup::Emit(llvm::Serializer& S) const {
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S.EmitInt(NumDecls);
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S.BatchEmitOwnedPtrs(NumDecls, &(*this)[0]);
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}
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/// Read - Deserialize a DeclGroup from Bitcode.
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DeclGroup* DeclGroup::Read(llvm::Deserializer& D, ASTContext& C) {
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unsigned NumDecls = (unsigned) D.ReadInt();
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unsigned Size = sizeof(DeclGroup) + sizeof(Decl*) * NumDecls;
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unsigned alignment = llvm::AlignOf<DeclGroup>::Alignment;
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DeclGroup* DG = (DeclGroup*) C.Allocate(Size, alignment);
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new (DG) DeclGroup();
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DG->NumDecls = NumDecls;
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D.BatchReadOwnedPtrs(NumDecls, &(*DG)[0], C);
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return DG;
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}
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DeclGroup::DeclGroup(unsigned numdecls, Decl** decls) : NumDecls(numdecls) {
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assert(numdecls > 0);
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assert(decls);
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memcpy(this+1, decls, numdecls * sizeof(*decls));
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}
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void DeclGroup::Destroy(ASTContext& C) {
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this->~DeclGroup();
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C.Deallocate((void*) this);
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}
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void DeclGroupRef::Emit(llvm::Serializer& S) const {
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if (isSingleDecl()) {
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S.EmitBool(false);
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S.EmitPtr(D);
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} else {
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S.EmitBool(true);
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S.EmitPtr(&getDeclGroup());
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}
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}
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DeclGroupRef DeclGroupRef::ReadVal(llvm::Deserializer& D) {
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if (D.ReadBool())
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return DeclGroupRef(D.ReadPtr<Decl>());
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return DeclGroupRef(D.ReadPtr<DeclGroup>());
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}
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