re PR c++/65133 ([C++11] Result type deduction proceeds even though argument deductio...

2015-05-12  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/65133
	* g++.dg/cpp0x/trailing10.C: New.

From-SVN: r223047

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 3f5f347b5f53c6911d20d0f7a8e54b4d7bc878a0..37d18532017e8792c872964a0f5c9e019d509d4a 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-05-12  Paolo Carlini  <paolo.carlini@oracle.com>
+
+       PR c++/65133
+       * g++.dg/cpp0x/trailing10.C: New.
+
 2015-05-12  Richard Biener  <rguenther@suse.de>
 
        * gcc.dg/vect/bb-slp-35.c: New testcase.

diff --git a/gcc/testsuite/g++.dg/cpp0x/trailing10.C b/gcc/testsuite/g++.dg/cpp0x/trailing10.C
new file mode 100644 (file)
index 0000000..19ef57f
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/trailing10.C
@@ -0,0 +1,33 @@
+// PR c++/65133
+// { dg-do compile { target c++11 } }
+
+template<bool, typename Tp = void>
+struct enable_if { };
+
+template<typename Tp>
+struct enable_if<true, Tp> { typedef Tp type; };
+
+template <int I>
+struct count
+{
+  using type = typename count<I-1>::type;
+};
+
+template <>
+struct count<0>
+{
+  using type = void;
+};
+
+template <int I>
+auto foo(typename enable_if<(I>=0)>::type *
+        = nullptr) -> typename count<I>::type { }
+
+template <int I>
+void foo(typename enable_if<(I<0)>::type * = nullptr) { }
+
+int main()
+{
+  foo<2>();
+  foo<-1>();
+}