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      1 //===- DeclGroup.cpp - Classes for representing groups of Decls -----------===//
      2 //
      3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
      4 // See https://llvm.org/LICENSE.txt for license information.
      5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
      6 //
      7 //===----------------------------------------------------------------------===//
      8 //
      9 //  This file defines the DeclGroup and DeclGroupRef classes.
     10 //
     11 //===----------------------------------------------------------------------===//
     12 
     13 #include "clang/AST/DeclGroup.h"
     14 #include "clang/AST/ASTContext.h"
     15 #include <cassert>
     16 #include <memory>
     17 
     18 using namespace clang;
     19 
     20 DeclGroup* DeclGroup::Create(ASTContext &C, Decl **Decls, unsigned NumDecls) {
     21   assert(NumDecls > 1 && "Invalid DeclGroup");
     22   unsigned Size = totalSizeToAlloc<Decl *>(NumDecls);
     23   void *Mem = C.Allocate(Size, alignof(DeclGroup));
     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   std::uninitialized_copy(decls, decls + numdecls,
     32                           getTrailingObjects<Decl *>());
     33 }
     34