Parsing and AST representation for dependent template names that occur

within nested-name-specifiers, e.g., for the "apply" in

  typename MetaFun::template apply<T1, T2>::type

At present, we can't instantiate these nested-name-specifiers, so our
testing is sketchy.

llvm-svn: 68081

2 files changed, 42 insertions, 0 deletions

diff --git a/clang/test/SemaTemplate/metafun-apply.cpp b/clang/test/SemaTemplate/metafun-apply.cpp
new file mode 100644
index 00000000000..22be5ab34f7
--- /dev/null
+++ b/clang/test/SemaTemplate/metafun-apply.cpp
@@ -0,0 +1,29 @@
+// RUN: clang-cc -fsyntax-only %s
+
+struct add_pointer {
+  template<typename T>
+  struct apply {
+    typedef T* type;
+  };
+};
+
+struct add_reference {
+  template<typename T>
+  struct apply {
+    typedef T& type;
+  };
+};
+
+template<typename MetaFun, typename T>
+struct apply1 {
+  typedef typename MetaFun::template apply<T>::type type;
+};
+
+#if 0
+// FIXME: The code below requires template instantiation for dependent
+// template-names that occur within nested-name-specifiers.
+int i;
+
+apply1<add_pointer, int>::type ip = &i;
+apply1<add_reference, int>::type ir = i;
+#endif
diff --git a/clang/test/SemaTemplate/nested-name-spec-template.cpp b/clang/test/SemaTemplate/nested-name-spec-template.cpp
index f856268d6ee..6df2ca6a918 100644
--- a/clang/test/SemaTemplate/nested-name-spec-template.cpp
+++ b/clang/test/SemaTemplate/nested-name-spec-template.cpp
@@ -42,8 +42,21 @@ namespace N {
   struct A<int> {
     struct X;
   };
+
+  struct B;
 }
 
 struct ::N::A<int>::X {
   int foo;
 };
+
+#if 0
+// FIXME: the following crashes the parser, because Sema has no way to
+// community that the "dependent" template-name N::template B doesn't
+// actually refer to a template.
+template<typename T>
+struct TestA {
+  typedef typename N::template B<T>::type type; // xpected-error{{'B' following the 'template' keyword does not refer to a template}}
+  // FIXME: should show what B *does* refer to.
+};
+#endif