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-rw-r--r--lib/Lex/Preprocessor.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index 5d9fc9567d..e53c392c38 100644
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -718,6 +718,11 @@ IdentifierInfo *Preprocessor::LookUpIdentifierInfo(Token &Identifier,
/// HandleIdentifier - This callback is invoked when the lexer reads an
/// identifier. This callback looks up the identifier in the map and/or
/// potentially macro expands it or turns it into a named token (like 'for').
+///
+/// Note that callers of this method are guarded by checking the
+/// IdentifierInfo's 'isHandleIdentifierCase' bit. If this method changes, the
+/// IdentifierInfo methods that compute these properties will need to change to
+/// match.
void Preprocessor::HandleIdentifier(Token &Identifier) {
assert(Identifier.getIdentifierInfo() &&
"Can't handle identifiers without identifier info!");