vendor/clang/clang-release_360-r226102

1 files changed, 46 insertions, 0 deletions

diff --git a/test/Parser/cxx11-templates.cpp b/test/Parser/cxx11-templates.cpp
new file mode 100644
index 000000000000..ed0495281c17
--- /dev/null
+++ b/test/Parser/cxx11-templates.cpp
@@ -0,0 +1,46 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+
+struct S {
+  template <typename Ty = char>
+  static_assert(sizeof(Ty) != 1, "Not a char"); // expected-error {{a static_assert declaration cannot be a template}}
+};
+
+template <typename Ty = char>
+static_assert(sizeof(Ty) != 1, "Not a char"); // expected-error {{a static_assert declaration cannot be a template}}
+
+namespace Ellipsis {
+  template<typename ...T> void f(T t..., int n); // expected-error {{must immediately precede declared identifier}}
+  template<typename ...T> void f(int n, T t...); // expected-error {{must immediately precede declared identifier}}
+  template<typename ...T> void f(int n, T t, ...); // expected-error {{unexpanded parameter pack}}
+  template<typename ...T> void f() {
+    f([]{
+      void g(T
+             t // expected-note {{place '...' immediately before declared identifier to declare a function parameter pack}}
+             ... // expected-warning {{'...' in this location creates a C-style varargs function, not a function parameter pack}}
+             // expected-note@-1 {{insert ',' before '...' to silence this warning}}
+             );
+      void h(T (&
+              ) // expected-note {{place '...' here to declare a function parameter pack}}
+             ... // expected-warning {{'...' in this location creates a C-style varargs function, not a function parameter pack}}
+             // expected-note@-1 {{insert ',' before '...' to silence this warning}}
+             );
+      void i(T (&), ...);
+    }...);
+  }
+  template<typename ...T> struct S {
+    void f(T t...); // expected-error {{must immediately precede declared identifier}}
+    void f(T ... // expected-note {{preceding '...' declares a function parameter pack}}
+           t...); // expected-warning-re {{'...' in this location creates a C-style varargs function{{$}}}}
+           // expected-note@-1 {{insert ',' before '...' to silence this warning}}
+  };
+
+  // FIXME: We should just issue a single error in this case pointing out where
+  // the '...' goes. It's tricky to recover correctly in this case, though,
+  // because the parameter is in scope in the default argument, so must be
+  // passed to Sema before we reach the ellipsis.
+  template<typename...T> void f(T n = 1 ...);
+  // expected-warning@-1 {{creates a C-style varargs}}
+  // expected-note@-2 {{place '...' immediately before declared identifier}}
+  // expected-note@-3 {{insert ','}}
+  // expected-error@-4 {{unexpanded parameter pack}}
+}