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PR libstdc++/88341 - Complex norm doesn't compile with C++11 

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.

From-SVN: r266788
This commit is contained in:
Edward Smith-Rowland 2018-12-04 16:26:39 +00:00 committed by Edward Smith-Rowland
parent e95ca1333d
commit d012ab6057
3 changed files with 35 additions and 2 deletions
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6
libstdc++-v3/ChangeLog
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@ -1,3 +1,9 @@
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.

4
libstdc++-v3/include/std/complex
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@ -659,7 +659,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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();
@ -671,7 +671,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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;

27
libstdc++-v3/testsuite/26_numerics/complex/value_operations/pr88341.cc Normal file
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@ -0,0 +1,27 @@
// { 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);
}