PR18232: implement instantiation for class-scope explicit specializations of

class templates (a Microsoft extension).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197298 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 49 insertions, 0 deletions

diff --git a/test/SemaTemplate/ms-class-specialization-class-scope.cpp b/test/SemaTemplate/ms-class-specialization-class-scope.cpp
new file mode 100644
index 0000000000..3ebb1c9c55
--- /dev/null
+++ b/test/SemaTemplate/ms-class-specialization-class-scope.cpp
@@ -0,0 +1,49 @@
+// RUN: %clang_cc1 -fms-extensions -fsyntax-only -verify %s -Wno-microsoft
+// RUN: %clang_cc1 -fms-extensions -fdelayed-template-parsing -fsyntax-only -verify %s -Wno-microsoft
+
+class A {
+public:
+  template<typename T> struct X { typedef int x; };
+
+  X<int>::x a; // expected-note {{implicit instantiation first required here}}
+
+  template<> struct X<int>; // expected-error {{explicit specialization of 'A::X<int>' after instantiation}}
+  template<> struct X<char>; // expected-note {{forward declaration}}
+
+  X<char>::x b; // expected-error {{incomplete type 'A::X<char>' named in nested name specifier}}
+
+  template<> struct X<double> {
+    typedef int y;
+  };
+
+  X<double>::y c;
+
+  template<> struct X<float> {}; // expected-note {{previous definition is here}}
+  template<> struct X<float> {}; // expected-error {{redefinition of 'A::X<float>'}}
+};
+
+A::X<void>::x axv;
+A::X<float>::x axf; // expected-error {{no type named 'x'}}
+
+template<class T> class B {
+public:
+  template<typename U> struct X { typedef int x; };
+
+  typename X<int>::x a; // expected-note {{implicit instantiation first required here}}
+
+  template<> struct X<int>; // expected-error {{explicit specialization of 'X<int>' after instantiation}}
+  template<> struct X<char>; // expected-note {{forward declaration}}
+
+  typename X<char>::x b; // expected-error {{incomplete type 'B<float>::X<char>' named in nested name specifier}}
+
+  template<> struct X<double> {
+    typedef int y;
+  };
+
+  typename X<double>::y c;
+
+  template<> struct X<float> {}; // expected-note {{previous definition is here}}
+  template<> struct X<T> {}; // expected-error {{redefinition of 'X<float>'}}
+};
+
+B<float> b; // expected-note {{in instantiation of}}