Support for calling overloaded function call operators (operator())

with function call syntax, e.g.,

  Functor f;
  f(x, y);

This is the easy part of handling calls to objects of class type 
(C++ [over.call.object]). The hard part (coping with conversions from
f to function pointer or reference types) will come later. Nobody uses
that stuff anyway, right? :)

llvm-svn: 59663

1 files changed, 5 insertions, 1 deletions

diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index a780012235a..147b4c8323d 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -1291,8 +1291,8 @@ ActOnCallExpr(ExprTy *fn, SourceLocation LParenLoc,
   // resolution to pick the function.
   if (Ovl) {
     OverloadCandidateSet CandidateSet;
-    OverloadCandidateSet::iterator Best;
     AddOverloadCandidates(Ovl, Args, NumArgs, CandidateSet);
+    OverloadCandidateSet::iterator Best;
     switch (BestViableFunction(CandidateSet, Best)) {
     case OR_Success: 
       {
@@ -1327,6 +1327,10 @@ ActOnCallExpr(ExprTy *fn, SourceLocation LParenLoc,
     }
   }
 
+  if (getLangOptions().CPlusPlus && Fn->getType()->isRecordType())
+    return BuildCallToObjectOfClassType(Fn, LParenLoc, Args, NumArgs,
+                                        CommaLocs, RParenLoc);
+
   // Promote the function operand.
   UsualUnaryConversions(Fn);