fd33598558
This adds constexpr to 11 algorithms defined in <numeric> as per P1645R1. libstdc++-v3/ChangeLog: P1645R1 constexpr for <numeric> algorithms * include/bits/stl_numeric.h (iota, accumulate, inner_product, partial_sum, adjacent_difference): Make conditionally constexpr for C++20. * include/std/numeric (__cpp_lib_constexpr_numeric): Define this feature test macro. (reduce, transform_reduce, exclusive_scan, inclusive_scan, transform_exclusive_scan, transform_inclusive_scan): Make conditionally constexpr for C++20. * include/std/version (__cpp_lib_constexpr_numeric): Define. * testsuite/26_numerics/accumulate/constexpr.cc: New test. * testsuite/26_numerics/adjacent_difference/constexpr.cc: Likewise. * testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise. * testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise. * testsuite/26_numerics/inner_product/constexpr.cc: Likewise. * testsuite/26_numerics/iota/constexpr.cc: Likewise. * testsuite/26_numerics/partial_sum/constexpr.cc: Likewise. * testsuite/26_numerics/reduce/constexpr.cc: Likewise. * testsuite/26_numerics/transform_exclusive_scan/constexpr.cc: Likewise. * testsuite/26_numerics/transform_inclusive_scan/constexpr.cc: Likewise. * testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise.
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
// Copyright (C) 2020 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/>.
|
|
|
|
// { dg-options "-std=gnu++2a" }
|
|
// { dg-do compile { target c++2a } }
|
|
|
|
#include <functional>
|
|
#include <numeric>
|
|
|
|
constexpr bool
|
|
test01()
|
|
{
|
|
int x[3] = {1,2,3};
|
|
int y[3];
|
|
std::exclusive_scan(x, x+3, y, 0);
|
|
return y[0] == 0 && y[1] == 1 && y[2] == 3;
|
|
}
|
|
|
|
static_assert(test01());
|
|
|
|
constexpr bool
|
|
test02()
|
|
{
|
|
int x[3] = {1,2,3};
|
|
int y[3];
|
|
std::exclusive_scan(x, x+3, y, 1, std::multiplies{});
|
|
return y[0] == 1 && y[1] == 1 && y[2] == 2;
|
|
}
|
|
|
|
static_assert(test02());
|