Improve declaration / expression disambiguation around ptr-operators, and use

the presence of an abstract declarator with a ptr-operator as proof that a
construct cannot parse as an expression to improve diagnostics along error
recovery paths.

llvm-svn: 230261

1 files changed, 9 insertions, 0 deletions

diff --git a/clang/test/Parser/cxx-ambig-init-templ.cpp b/clang/test/Parser/cxx-ambig-init-templ.cpp
index 1f692664137..584262c9be4 100644
--- a/clang/test/Parser/cxx-ambig-init-templ.cpp
+++ b/clang/test/Parser/cxx-ambig-init-templ.cpp
@@ -170,6 +170,15 @@ namespace ElaboratedTypeSpecifiers {
   };
 }
 
+namespace AbstractPtrOperatorDeclarator {
+  template <int, typename> struct X {
+    operator int();
+  };
+  struct Y {
+    void f(int a = X<0, int (*)()>());
+  };
+}
+
 namespace PR20459 {
   template <typename EncTraits> struct A {
      void foo(int = EncTraits::template TypeEnc<int, int>::val); // ok