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Reid Spencer5f016e22007-07-11 17:01:13 +00001//===--- MacroInfo.cpp - Information about #defined identifiers -----------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file was developed by Chris Lattner and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the MacroInfo interface.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang/Lex/MacroInfo.h"
15#include "clang/Lex/Preprocessor.h"
16using namespace clang;
17
18MacroInfo::MacroInfo(SourceLocation DefLoc) : Location(DefLoc) {
19 IsFunctionLike = false;
20 IsC99Varargs = false;
21 IsGNUVarargs = false;
22 IsBuiltinMacro = false;
23 IsTargetSpecific = false;
24 IsDisabled = false;
25 IsUsed = true;
Chris Lattner25c96482007-07-14 22:46:43 +000026
27 ArgumentList = 0;
28 NumArguments = 0;
Reid Spencer5f016e22007-07-11 17:01:13 +000029}
30
31/// isIdenticalTo - Return true if the specified macro definition is equal to
32/// this macro in spelling, arguments, and whitespace. This is used to emit
33/// duplicate definition warnings. This implements the rules in C99 6.10.3.
34///
35/// Note that this intentionally does not check isTargetSpecific for matching.
36///
37bool MacroInfo::isIdenticalTo(const MacroInfo &Other, Preprocessor &PP) const {
38 // Check # tokens in replacement, number of args, and various flags all match.
39 if (ReplacementTokens.size() != Other.ReplacementTokens.size() ||
Chris Lattner25c96482007-07-14 22:46:43 +000040 getNumArgs() != Other.getNumArgs() ||
Reid Spencer5f016e22007-07-11 17:01:13 +000041 isFunctionLike() != Other.isFunctionLike() ||
42 isC99Varargs() != Other.isC99Varargs() ||
43 isGNUVarargs() != Other.isGNUVarargs())
44 return false;
45
46 // Check arguments.
47 for (arg_iterator I = arg_begin(), OI = Other.arg_begin(), E = arg_end();
48 I != E; ++I, ++OI)
49 if (*I != *OI) return false;
50
51 // Check all the tokens.
52 for (unsigned i = 0, e = ReplacementTokens.size(); i != e; ++i) {
Chris Lattnerd2177732007-07-20 16:59:19 +000053 const Token &A = ReplacementTokens[i];
54 const Token &B = Other.ReplacementTokens[i];
Reid Spencer5f016e22007-07-11 17:01:13 +000055 if (A.getKind() != B.getKind() ||
56 A.isAtStartOfLine() != B.isAtStartOfLine() ||
57 A.hasLeadingSpace() != B.hasLeadingSpace())
58 return false;
59
60 // If this is an identifier, it is easy.
61 if (A.getIdentifierInfo() || B.getIdentifierInfo()) {
62 if (A.getIdentifierInfo() != B.getIdentifierInfo())
63 return false;
64 continue;
65 }
66
67 // Otherwise, check the spelling.
68 if (PP.getSpelling(A) != PP.getSpelling(B))
69 return false;
70 }
71
72 return true;
73}