Add test cases for r155935.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155940 91177308-0d34-0410-b5e6-96231b3b80d8

test/CXX/basic/basic.lookup/basic.lookup.classref/p1-cxx11.cpp

+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -fdiagnostics-show-option -verify %s
+
+// C++98 [basic.lookup.classref]p1:
+//   In a class member access expression (5.2.5), if the . or -> token is
+//   immediately followed by an identifier followed by a <, the identifier must
+//   be looked up to determine whether the < is the beginning of a template
+//   argument list (14.2) or a less-than operator. The identifier is first
+//   looked up in the class of the object expression. If the identifier is not
+//   found, it is then looked up in the context of the entire postfix-expression
+//   and shall name a class or function template. If the lookup in the class of
+//   the object expression finds a template, the name is also looked up in the
+//   context of the entire postfix-expression and
+//    -- if the name is not found, the name found in the class of the object
+//       expression is used, otherwise
+//    -- if the name is found in the context of the entire postfix-expression
+//       and does not name a class template, the name found in the class of the
+//       object expression is used, otherwise
+//    -- if the name found is a class template, it must refer to the same
+//       entity as the one found in the class of the object expression,
+//       otherwise the program is ill-formed.
+
+// From PR 7247
+template<typename T>
+struct set{};
+struct Value {
+  template<typename T>
+  void set(T value) {}
+
+  void resolves_to_same() {
+    Value v;
+    v.set<double>(3.2);
+  }
+};
+void resolves_to_different() {
+  {
+    Value v;
+    // The fact that the next line is a warning rather than an error is an
+    // extension.
+    v.set<double>(3.2);
+  }
+  {
+    int set;  // Non-template.
+    Value v;
+    v.set<double>(3.2);
+  }
+}
+
+namespace rdar9915664 {
+  struct A {
+    template<typename T> void a();
+  };
+
+  struct B : A { };
+
+  struct C : A { };
+
+  struct D : B, C {
+    A &getA() { return static_cast<B&>(*this); }
+
+    void test_a() {
+      getA().a<int>();
+    }
+  };
+}
+
+namespace PR11856 {
+  template<typename T> T end(T);
+
+  template <typename T>
+  void Foo() {
+    T it1;
+    if (it1->end < it1->end) {
+    }
+  }
+
+  template<typename T> T *end(T*);
+
+  class X { };
+  template <typename T>
+  void Foo2() {
+    T it1;
+    if (it1->end < it1->end) {
+    }
+
+    X *x;
+    if (x->end < 7) {  // expected-error{{no member named 'end' in 'PR11856::X'}}
+    }
+  }
+}

test/CXX/basic/basic.lookup/basic.lookup.classref/p4-cxx11.cpp

+// RUN: %clang_cc1 -std=c++11 %s -verify
+
+struct A { void f(); };
+struct C { void f(); };
+struct B : A { typedef A X; };
+struct D : C { typedef C X;   void g(); };
+
+void D::g() 
+{
+    B * b = new B;
+    b->X::f(); // lookup for X finds B::X
+}
+
+typedef int X;
+void h(void) 
+{
+    B * b = new B;
+    b->X::f(); // lookup for X finds B::X
+}
+
+