1 files changed, 70 insertions, 0 deletions
diff --git a/Lex/MacroInfo.cpp b/Lex/MacroInfo.cpp
new file mode 100644
index 0000000000..e6dae42769
--- /dev/null
+++ b/Lex/MacroInfo.cpp
@@ -0,0 +1,70 @@
+//===--- MacroInfo.cpp - Information about #defined identifiers -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Chris Lattner and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the MacroInfo interface.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Lex/MacroInfo.h"
+#include "clang/Lex/Preprocessor.h"
+using namespace clang;
+
+MacroInfo::MacroInfo(SourceLocation DefLoc) : Location(DefLoc) {
+  IsFunctionLike = false;
+  IsC99Varargs = false;
+  IsGNUVarargs = false;
+  IsBuiltinMacro = false;
+  IsTargetSpecific = false;
+  IsDisabled = false;
+  IsUsed = true;
+}
+
+/// isIdenticalTo - Return true if the specified macro definition is equal to
+/// this macro in spelling, arguments, and whitespace.  This is used to emit
+/// duplicate definition warnings.  This implements the rules in C99 6.10.3.
+///
+/// Note that this intentionally does not check isTargetSpecific for matching.
+///
+bool MacroInfo::isIdenticalTo(const MacroInfo &Other, Preprocessor &PP) const {
+  // Check # tokens in replacement, number of args, and various flags all match.
+  if (ReplacementTokens.size() != Other.ReplacementTokens.size() ||
+      Arguments.size() != Other.Arguments.size() ||
+      isFunctionLike() != Other.isFunctionLike() ||
+      isC99Varargs() != Other.isC99Varargs() ||
+      isGNUVarargs() != Other.isGNUVarargs())
+    return false;
+
+  // Check arguments.
+  for (arg_iterator I = arg_begin(), OI = Other.arg_begin(), E = arg_end();
+       I != E; ++I, ++OI)
+    if (*I != *OI) return false;
+       
+  // Check all the tokens.
+  for (unsigned i = 0, e = ReplacementTokens.size(); i != e; ++i) {
+    const LexerToken &A = ReplacementTokens[i];
+    const LexerToken &B = Other.ReplacementTokens[i];
+    if (A.getKind() != B.getKind() || 
+        A.isAtStartOfLine() != B.isAtStartOfLine() ||
+        A.hasLeadingSpace() != B.hasLeadingSpace())
+      return false;
+    
+    // If this is an identifier, it is easy.
+    if (A.getIdentifierInfo() || B.getIdentifierInfo()) {
+      if (A.getIdentifierInfo() != B.getIdentifierInfo())
+        return false;
+      continue;
+    }
+    
+    // Otherwise, check the spelling.
+    if (PP.getSpelling(A) != PP.getSpelling(B))
+      return false;
+  }
+  
+  return true;
+}