lib/AST/DeclGroup.cpp

   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/Decl.h"
  16 #include "clang/AST/ASTContext.h"
  17 #include "llvm/Support/Allocator.h"
  18 using namespace clang;
  19
  20 DeclGroup* DeclGroup::Create(ASTContext &C, Decl **Decls, unsigned NumDecls) {
  21   assert(NumDecls > 1 && "Invalid DeclGroup");
  22   unsigned Size = sizeof(DeclGroup) + sizeof(Decl*) * NumDecls;
  23   void* Mem = C.Allocate(Size, llvm::AlignOf<DeclGroup>::Alignment);
  24   new (Mem) DeclGroup(NumDecls, Decls);
  25   return static_cast<DeclGroup*>(Mem);
  26 }
  27
  28 DeclGroup::DeclGroup(unsigned numdecls, Decl** decls) : NumDecls(numdecls) {
  29   assert(numdecls > 0);
  30   assert(decls);
  31   memcpy(this+1, decls, numdecls * sizeof(*decls));
  32 }