Issue a warning when there's an ambiguous function declarator (that could be a direct initializer for a variable defition).

Idea originated from here: http://thread.gmane.org/gmane.comp.gcc.devel/101524

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57609 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index c541a1336f..142347687e 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -1226,11 +1226,14 @@ void Parser::ParseDirectDeclarator(Declarator &D) {
   
   while (1) {
     if (Tok.is(tok::l_paren)) {
+      // When not in file scope, warn for ambiguous function declarators, just
+      // in case the author intended it as a variable definition.
+      bool diagIfAmbiguous = D.getContext() != Declarator::FileContext;
       // The paren may be part of a C++ direct initializer, eg. "int x(1);".
       // In such a case, check if we actually have a function declarator; if it
       // is not, the declarator has been fully parsed.
       if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit() &&
-          !isCXXFunctionDeclarator())
+          !isCXXFunctionDeclarator(diagIfAmbiguous))
         break;
       ParseFunctionDeclarator(ConsumeParen(), D);
     } else if (Tok.is(tok::l_square)) {