Implement template instantiation for several more kinds of expressions:
  - C++ function casts, e.g., T(foo)
  - sizeof(), alignof()

More importantly, this allows us to verify that we're performing
overload resolution during template instantiation, with
argument-dependent lookup and the "cached" results of name lookup from
the template definition.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66947 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaLookup.cpp b/lib/Sema/SemaLookup.cpp
index d391c07..57683b3 100644
--- a/lib/Sema/SemaLookup.cpp
+++ b/lib/Sema/SemaLookup.cpp
@@ -1392,6 +1392,9 @@
 IsAcceptableNonMemberOperatorCandidate(FunctionDecl *Fn,
                                        QualType T1, QualType T2,
                                        ASTContext &Context) {
+  if (T1->isDependentType() || (!T2.isNull() && T2->isDependentType()))
+    return true;
+
   if (T1->isRecordType() || (!T2.isNull() && T2->isRecordType()))
     return true;