+2018-12-03 Edward Smith-Rowland <3dw4rd@verizon.net>
+
+ PR libstdc++/88341 - Complex norm doesn't compile with C++11
+ * include/std/complex (_S_do_it): Make C++20 constexpr.
+ * testsuite/26_numerics/complex/value_operations/pr88341.cc: New test.
+
2018-11-30 Edward Smith-Rowland <3dw4rd@verizon.net>
Implement P0457R2 String Prefix and Suffix Checking.
struct _Norm_helper
{
template<typename _Tp>
- static inline _GLIBCXX_CONSTEXPR _Tp _S_do_it(const complex<_Tp>& __z)
+ static inline _GLIBCXX20_CONSTEXPR _Tp _S_do_it(const complex<_Tp>& __z)
{
const _Tp __x = __z.real();
const _Tp __y = __z.imag();
struct _Norm_helper<true>
{
template<typename _Tp>
- static inline _GLIBCXX_CONSTEXPR _Tp _S_do_it(const complex<_Tp>& __z)
+ static inline _GLIBCXX20_CONSTEXPR _Tp _S_do_it(const complex<_Tp>& __z)
{
//_Tp __res = std::abs(__z);
//return __res * __res;
--- /dev/null
+// { dg-options "-std=gnu++11" }
+// { dg-do compile { target c++11 } }
+
+// Copyright (C) 2018 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <complex>
+
+double
+n(std::complex<double>& c)
+{
+ return std::norm(c);
+}