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 } 35
