1 //===--- MacroInfo.cpp - Information about #defined identifiers -----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the MacroInfo interface.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Lex/MacroInfo.h"
15 #include "clang/Lex/Preprocessor.h"
16 using namespace clang;
18 MacroInfo::MacroInfo(SourceLocation DefLoc) : Location(DefLoc) {
19 IsFunctionLike = false;
22 IsBuiltinMacro = false;
30 /// isIdenticalTo - Return true if the specified macro definition is equal to
31 /// this macro in spelling, arguments, and whitespace. This is used to emit
32 /// duplicate definition warnings. This implements the rules in C99 6.10.3.
34 bool MacroInfo::isIdenticalTo(const MacroInfo &Other, Preprocessor &PP) const {
35 // Check # tokens in replacement, number of args, and various flags all match.
36 if (ReplacementTokens.size() != Other.ReplacementTokens.size() ||
37 getNumArgs() != Other.getNumArgs() ||
38 isFunctionLike() != Other.isFunctionLike() ||
39 isC99Varargs() != Other.isC99Varargs() ||
40 isGNUVarargs() != Other.isGNUVarargs())
44 for (arg_iterator I = arg_begin(), OI = Other.arg_begin(), E = arg_end();
46 if (*I != *OI) return false;
48 // Check all the tokens.
49 for (unsigned i = 0, e = ReplacementTokens.size(); i != e; ++i) {
50 const Token &A = ReplacementTokens[i];
51 const Token &B = Other.ReplacementTokens[i];
52 if (A.getKind() != B.getKind())
55 // If this isn't the first first token, check that the whitespace and
56 // start-of-line characteristics match.
58 (A.isAtStartOfLine() != B.isAtStartOfLine() ||
59 A.hasLeadingSpace() != B.hasLeadingSpace()))
62 // If this is an identifier, it is easy.
63 if (A.getIdentifierInfo() || B.getIdentifierInfo()) {
64 if (A.getIdentifierInfo() != B.getIdentifierInfo())
69 // Otherwise, check the spelling.
70 if (PP.getSpelling(A) != PP.getSpelling(B))