1 files changed, 56 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp0x/sfinae11.C b/gcc/testsuite/g++.dg/cpp0x/sfinae11.C
new file mode 100644
index 000000000..a3ffc34f9
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/sfinae11.C
@@ -0,0 +1,56 @@
+// PR c++/48468
+// { dg-options -std=c++0x }
+// { dg-prune-output "note" }
+
+template<class T>
+T&& declval() noexcept;
+
+template< class T >
+inline void f1( T& x ) noexcept( noexcept( declval<T&>().foo() ) )
+{
+  x.foo();
+}
+
+template< class T,
+  bool Noexcept = noexcept( declval<T&>().foo() )
+>
+inline void f2( T& x ) noexcept( Noexcept )
+{
+  x.foo();
+}
+
+// a common and trivial mistake
+template< class T >
+inline void f3( T& x ) noexcept( declval<T&>().foo() )
+{
+  x.foo();
+}
+
+struct X
+{
+  void foo();
+};
+
+struct Y
+{
+  void foo() noexcept;
+};
+
+struct Z {};
+
+int main()
+{
+  X x; Y y; Z z;
+
+  static_assert( !noexcept( f1(x) ), "OK." );
+  static_assert( !noexcept( f2(x) ), "OK." );
+  // static_assert( !noexcept( f3(x) ), "shall be ill-formed(OK)." );
+
+  static_assert(  noexcept( f1(y) ), "OK." );
+  static_assert(  noexcept( f2(y) ), "OK." );
+  // static_assert(  noexcept( f3(y) ), "shall be ill-formed(OK)." );
+
+  static_assert(  noexcept( f1(z) ), "shall be ill-formed." ); // { dg-error "no match" }
+  static_assert(  noexcept( f2(z) ), "shall be ill-formed." ); // { dg-error "no match" }
+  static_assert( !noexcept( f3(z) ), "shall be ill-formed." ); // { dg-error "no match" }
+}