TemplateBase.cpp revision 275c10a8a4a43219f67d8d2c912ec6294d9d9af2 
1//===--- TemplateBase.cpp - Common template AST class implementation ------===//
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 implements common classes used throughout C++ template
11// representations.
12//
13//===----------------------------------------------------------------------===//
14
15#include "llvm/ADT/FoldingSet.h"
16#include "clang/AST/TemplateBase.h"
17#include "clang/AST/DeclBase.h"
18#include "clang/AST/Expr.h"
19
20using namespace clang;
21
22//===----------------------------------------------------------------------===//
23// TemplateArgument Implementation
24//===----------------------------------------------------------------------===//
25
26TemplateArgument::TemplateArgument(Expr *E) : Kind(Expression) {
27  TypeOrValue = reinterpret_cast<uintptr_t>(E);
28  StartLoc = E->getSourceRange().getBegin();
29}
30
31/// \brief Construct a template argument pack.
32void TemplateArgument::setArgumentPack(TemplateArgument *args, unsigned NumArgs,
33                                       bool CopyArgs) {
34  assert(isNull() && "Must call setArgumentPack on a null argument");
35
36  Kind = Pack;
37  Args.NumArgs = NumArgs;
38  Args.CopyArgs = CopyArgs;
39  if (!Args.CopyArgs) {
40    Args.Args = args;
41    return;
42  }
43
44  // FIXME: Allocate in ASTContext
45  Args.Args = new TemplateArgument[NumArgs];
46  for (unsigned I = 0; I != Args.NumArgs; ++I)
47    Args.Args[I] = args[I];
48}
49
50void TemplateArgument::Profile(llvm::FoldingSetNodeID &ID,
51                               ASTContext &Context) const {
52  ID.AddInteger(Kind);
53  switch (Kind) {
54  case Null:
55    break;
56
57  case Type:
58    getAsType().Profile(ID);
59    break;
60
61  case Declaration:
62    ID.AddPointer(getAsDecl()? getAsDecl()->getCanonicalDecl() : 0);
63    break;
64
65  case Integral:
66    getAsIntegral()->Profile(ID);
67    getIntegralType().Profile(ID);
68    break;
69
70  case Expression:
71    getAsExpr()->Profile(ID, Context, true);
72    break;
73
74  case Pack:
75    ID.AddInteger(Args.NumArgs);
76    for (unsigned I = 0; I != Args.NumArgs; ++I)
77      Args.Args[I].Profile(ID, Context);
78  }
79}
80