clang  3.7.0
DeclGroup.cpp
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1 //===--- DeclGroup.cpp - Classes for representing groups of Decls -*- C++ -*-==//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the DeclGroup and DeclGroupRef classes.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/AST/DeclGroup.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Decl.h"
17 #include "llvm/Support/Allocator.h"
18 using namespace clang;
19 
20 DeclGroup* DeclGroup::Create(ASTContext &C, Decl **Decls, unsigned NumDecls) {
21  static_assert(sizeof(DeclGroup) % llvm::AlignOf<void *>::Alignment == 0,
22  "Trailing data is unaligned!");
23  assert(NumDecls > 1 && "Invalid DeclGroup");
24  unsigned Size = sizeof(DeclGroup) + sizeof(Decl*) * NumDecls;
25  void* Mem = C.Allocate(Size, llvm::AlignOf<DeclGroup>::Alignment);
26  new (Mem) DeclGroup(NumDecls, Decls);
27  return static_cast<DeclGroup*>(Mem);
28 }
29 
30 DeclGroup::DeclGroup(unsigned numdecls, Decl** decls) : NumDecls(numdecls) {
31  assert(numdecls > 0);
32  assert(decls);
33  memcpy(this+1, decls, numdecls * sizeof(*decls));
34 }
Defines the clang::ASTContext interface.
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:89
unsigned NumDecls
Definition: DeclGroup.h:30
static DeclGroup * Create(ASTContext &C, Decl **Decls, unsigned NumDecls)
Definition: DeclGroup.cpp:20
void * Allocate(size_t Size, unsigned Align=8) const
Definition: ASTContext.h:501