I tried changing this test to use { dg-do compile { target c++14 } }
and it started to FAIL, because the complex_literals operators are
only used for -std=c++14 mode. With -std=gnu++14 we get the GNU
extension described at https://gcc.gnu.org/onlinedocs/gcc/Complex.html
* testsuite/26_numerics/complex/literals/types.cc: Add comment.
Tested x86_64-linux, committed to trunk.
commit 9565c37c3a3a3624190b38fe92d9f5a2cc9b7a04
Author: redi <redi@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed Aug 17 16:09:15 2016 +0000
Add comment explaining why -std=c++14 is needed.
* testsuite/26_numerics/complex/literals/types.cc: Add comment.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@239543
138bc75d-0d04-0410-961f-82ee72b054a4
diff --git a/libstdc++-v3/testsuite/26_numerics/complex/literals/types.cc
b/libstdc++-v3/testsuite/26_numerics/complex/literals/types.cc
index ef48c0d..ad9b863 100644
--- a/libstdc++-v3/testsuite/26_numerics/complex/literals/types.cc
+++ b/libstdc++-v3/testsuite/26_numerics/complex/literals/types.cc
@@ -1,4 +1,6 @@
-// { dg-options "-std=c++1y" }
+// Use -std=c++14 explicitly, because -std=gnu++14 enables GNU extension for
+// complex literals, so 1.0if is __complex__ float not std::complex<float>.
+// { dg-options "-std=c++14" }
// { dg-do compile }
// Copyright (C) 2013-2016 Free Software Foundation, Inc.
