From: Patrick Palka Date: Tue, 25 Feb 2020 19:40:41 +0000 (-0500) Subject: libstdc++: P1645R1 constexpr for algorithms X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fd335985582cbb9de3a08e071e652bb38960b493;p=gcc.git libstdc++: P1645R1 constexpr for algorithms This adds constexpr to 11 algorithms defined in as per P1645R1. libstdc++-v3/ChangeLog: P1645R1 constexpr for 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. --- diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index d545526d93a..8af27d4cc52 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,27 @@ +2020-02-26 Patrick Palka + + P1645R1 constexpr for 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. + 2020-02-26 Jonathan Wakely * include/bits/ranges_algo.h (__lexicographical_compare_fn): Declare diff --git a/libstdc++-v3/include/bits/stl_numeric.h b/libstdc++-v3/include/bits/stl_numeric.h index dd4683fe92e..f95c86a0d48 100644 --- a/libstdc++-v3/include/bits/stl_numeric.h +++ b/libstdc++-v3/include/bits/stl_numeric.h @@ -83,6 +83,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION * @ingroup numeric_ops */ template + _GLIBCXX20_CONSTEXPR void iota(_ForwardIterator __first, _ForwardIterator __last, _Tp __value) { @@ -128,6 +129,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO * @return The final sum. */ template + _GLIBCXX20_CONSTEXPR inline _Tp accumulate(_InputIterator __first, _InputIterator __last, _Tp __init) { @@ -154,6 +156,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO * @return The final sum. */ template + _GLIBCXX20_CONSTEXPR inline _Tp accumulate(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOperation __binary_op) @@ -182,6 +185,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO * @return The final inner product. */ template + _GLIBCXX20_CONSTEXPR inline _Tp inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init) @@ -214,6 +218,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO */ template + _GLIBCXX20_CONSTEXPR inline _Tp inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init, @@ -246,6 +251,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO * @return Iterator pointing just beyond the values written to __result. */ template + _GLIBCXX20_CONSTEXPR _OutputIterator partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result) @@ -287,6 +293,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO */ template + _GLIBCXX20_CONSTEXPR _OutputIterator partial_sum(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOperation __binary_op) @@ -326,6 +333,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO * DR 539. partial_sum and adjacent_difference should mention requirements */ template + _GLIBCXX20_CONSTEXPR _OutputIterator adjacent_difference(_InputIterator __first, _InputIterator __last, _OutputIterator __result) @@ -369,6 +377,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO */ template + _GLIBCXX20_CONSTEXPR _OutputIterator adjacent_difference(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOperation __binary_op) diff --git a/libstdc++-v3/include/std/numeric b/libstdc++-v3/include/std/numeric index cf35191cb47..57dcac6d215 100644 --- a/libstdc++-v3/include/std/numeric +++ b/libstdc++-v3/include/std/numeric @@ -226,6 +226,10 @@ namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION +#if __cplusplus > 201703L +#define __cpp_lib_constexpr_numeric 201911L +#endif + /// @addtogroup numeric_ops /// @{ @@ -249,6 +253,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION * arithmetic) the result can be different. */ template + _GLIBCXX20_CONSTEXPR _Tp reduce(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOperation __binary_op) @@ -284,6 +289,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION * Equivalent to calling `std::reduce(first, last, init, std::plus<>())`. */ template + _GLIBCXX20_CONSTEXPR inline _Tp reduce(_InputIterator __first, _InputIterator __last, _Tp __init) { return std::reduce(__first, __last, std::move(__init), plus<>()); } @@ -300,6 +306,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION * Equivalent to calling `std::reduce(first, last, T{}, std::plus<>())`. */ template + _GLIBCXX20_CONSTEXPR inline typename iterator_traits<_InputIterator>::value_type reduce(_InputIterator __first, _InputIterator __last) { @@ -327,6 +334,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION */ template + _GLIBCXX20_CONSTEXPR _Tp transform_reduce(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init, @@ -369,6 +377,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION * elements. */ template + _GLIBCXX20_CONSTEXPR inline _Tp transform_reduce(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init) @@ -394,6 +403,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION */ template + _GLIBCXX20_CONSTEXPR _Tp transform_reduce(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOperation __binary_op, _UnaryOperation __unary_op) @@ -436,6 +446,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION */ template + _GLIBCXX20_CONSTEXPR _OutputIterator exclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Tp __init, @@ -469,6 +480,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION * so the Nth input element is not included. */ template + _GLIBCXX20_CONSTEXPR inline _OutputIterator exclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Tp __init) @@ -497,6 +509,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION */ template + _GLIBCXX20_CONSTEXPR _OutputIterator inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOperation __binary_op, @@ -525,6 +538,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION */ template + _GLIBCXX20_CONSTEXPR _OutputIterator inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOperation __binary_op) @@ -557,6 +571,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION * so the Nth input element is included. */ template + _GLIBCXX20_CONSTEXPR inline _OutputIterator inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result) @@ -584,6 +599,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION */ template + _GLIBCXX20_CONSTEXPR _OutputIterator transform_exclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Tp __init, @@ -622,6 +638,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION */ template + _GLIBCXX20_CONSTEXPR _OutputIterator transform_inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, @@ -655,6 +672,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION */ template + _GLIBCXX20_CONSTEXPR _OutputIterator transform_inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, diff --git a/libstdc++-v3/include/std/version b/libstdc++-v3/include/std/version index e2ccf619d4a..c6a202e250d 100644 --- a/libstdc++-v3/include/std/version +++ b/libstdc++-v3/include/std/version @@ -187,6 +187,7 @@ #define __cpp_lib_constexpr_complex 201711L #define __cpp_lib_constexpr_dynamic_alloc 201907L #define __cpp_lib_constexpr_invoke 201907L +#define __cpp_lib_constexpr_numeric 201911L #define __cpp_lib_erase_if 202002L #define __cpp_lib_interpolate 201902L #ifdef _GLIBCXX_HAS_GTHREADS diff --git a/libstdc++-v3/testsuite/26_numerics/accumulate/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/accumulate/constexpr.cc new file mode 100644 index 00000000000..6fefd5a3f98 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/accumulate/constexpr.cc @@ -0,0 +1,42 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +constexpr bool +test01() +{ + int x[5] = {1,2,3,4,5}; + auto sum = std::accumulate(x, x+5, 0); + return sum == 15; +} + +static_assert(test01()); + +constexpr bool +test02() +{ + int x[5] = {1,2,3,4,5}; + auto prod = std::accumulate(x, x+5, 1, std::multiplies{}); + return prod == 120; +} + +static_assert(test02()); diff --git a/libstdc++-v3/testsuite/26_numerics/adjacent_difference/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/adjacent_difference/constexpr.cc new file mode 100644 index 00000000000..5f79284e268 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/adjacent_difference/constexpr.cc @@ -0,0 +1,44 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +constexpr bool +test01() +{ + int x[5] = {1,2,3,4,5}; + int y[5]; + std::adjacent_difference(x, x+5, y); + return y[0] == 1 && y[1] == 1 && y[2] == 1 && y[3] == 1 && y[4] == 1; +} + +static_assert(test01()); + +constexpr bool +test02() +{ + int x[5] = {1,2,3,4,5}; + int y[5]; + std::adjacent_difference(x, x+5, y, std::multiplies{}); + return y[0] == 1 && y[1] == 2 && y[2] == 6 && y[3] == 12 && y[4] == 20; +} + +static_assert(test02()); diff --git a/libstdc++-v3/testsuite/26_numerics/exclusive_scan/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/exclusive_scan/constexpr.cc new file mode 100644 index 00000000000..c885ba5dbd1 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/exclusive_scan/constexpr.cc @@ -0,0 +1,44 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +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()); diff --git a/libstdc++-v3/testsuite/26_numerics/inclusive_scan/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/inclusive_scan/constexpr.cc new file mode 100644 index 00000000000..a50a70e9fc2 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/inclusive_scan/constexpr.cc @@ -0,0 +1,55 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +constexpr bool +test01() +{ + int x[3] = {1,2,3}; + int y[3]; + std::inclusive_scan(x, x+3, y); + return y[0] == 1 && y[1] == 3 && y[2] == 6; +} + +static_assert(test01()); + +constexpr bool +test02() +{ + int x[3] = {1,2,3}; + int y[3]; + std::inclusive_scan(x, x+3, y, std::multiplies{}); + return y[0] == 1 && y[1] == 2 && y[2] == 6; +} + +static_assert(test02()); + +constexpr bool +test03() +{ + int x[3] = {1,2,3}; + int y[3]; + std::inclusive_scan(x, x+3, y, std::multiplies{}, 2); + return y[0] == 2 && y[1] == 4 && y[2] == 12; +} + +static_assert(test03()); diff --git a/libstdc++-v3/testsuite/26_numerics/inner_product/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/inner_product/constexpr.cc new file mode 100644 index 00000000000..a6aaf351560 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/inner_product/constexpr.cc @@ -0,0 +1,45 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +constexpr bool +test01() +{ + int x[5] = {1,2,3,4,5}; + int y[5] = {2,4,6,8,10}; + auto ret = std::inner_product(x, x+5, y, 0); + return ret == 110; +} + +static_assert(test01()); + +constexpr bool +test02() +{ + int x[5] = {1,2,3,4,5}; + int y[5] = {2,4,6,8,10}; + auto ret = std::inner_product(x, x+5, y, 1, + std::multiplies{}, std::plus{}); + return ret == 3*6*9*12*15; +} + +static_assert(test02()); diff --git a/libstdc++-v3/testsuite/26_numerics/iota/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/iota/constexpr.cc new file mode 100644 index 00000000000..50eecf8b605 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/iota/constexpr.cc @@ -0,0 +1,31 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include + +constexpr bool +test01() +{ + int x[3] = {0}; + std::iota(x, x+3, 0); + return x[0] == 0 && x[1] == 1 && x[2] == 2; +} + +static_assert(test01()); diff --git a/libstdc++-v3/testsuite/26_numerics/partial_sum/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/partial_sum/constexpr.cc new file mode 100644 index 00000000000..c2e758492e4 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/partial_sum/constexpr.cc @@ -0,0 +1,44 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +constexpr bool +test01() +{ + int x[3] = {1,2,3}; + int y[3]; + std::partial_sum(x, x+3, y); + return y[0] == 1 && y[1] == 3 && y[2] == 6; +} + +static_assert(test01()); + +constexpr bool +test02() +{ + int x[3] = {1,2,3}; + int y[3]; + std::partial_sum(x, x+3, y, std::multiplies{}); + return y[0] == 1 && y[1] == 2 && y[2] == 6; +} + +static_assert(test02()); diff --git a/libstdc++-v3/testsuite/26_numerics/reduce/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/reduce/constexpr.cc new file mode 100644 index 00000000000..5ed48892df2 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/reduce/constexpr.cc @@ -0,0 +1,52 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +constexpr bool +test01() +{ + int x[5] = {1,2,3,4,5}; + auto sum = std::reduce(x, x+5); + return sum == 15; +} + +static_assert(test01()); + +constexpr bool +test02() +{ + int x[5] = {1,2,3,4,5}; + auto sum = std::reduce(x, x+5, 0); + return sum == 15; +} + +static_assert(test02()); + +constexpr bool +test03() +{ + int x[5] = {1,2,3,4,5}; + auto prod = std::reduce(x, x+5, 1, std::multiplies{}); + return prod == 120; +} + +static_assert(test03()); diff --git a/libstdc++-v3/testsuite/26_numerics/transform_exclusive_scan/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/transform_exclusive_scan/constexpr.cc new file mode 100644 index 00000000000..f01fd241a8a --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/transform_exclusive_scan/constexpr.cc @@ -0,0 +1,33 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +constexpr bool +test01() +{ + int x[3] = {1,2,3}; + int y[3]; + std::transform_exclusive_scan(x, x+3, y, 0, std::plus{}, std::negate{}); + return y[0] == 0 && y[1] == -1 && y[2] == -3; +} + +static_assert(test01()); diff --git a/libstdc++-v3/testsuite/26_numerics/transform_inclusive_scan/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/transform_inclusive_scan/constexpr.cc new file mode 100644 index 00000000000..6f072b74569 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/transform_inclusive_scan/constexpr.cc @@ -0,0 +1,44 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +constexpr bool +test01() +{ + int x[3] = {1,2,3}; + int y[3]; + std::transform_inclusive_scan(x, x+3, y, std::plus{}, std::negate{}, 0); + return y[0] == -1 && y[1] == -3 && y[2] == -6; +} + +static_assert(test01()); + +constexpr bool +test02() +{ + int x[3] = {1,2,3}; + int y[3]; + std::transform_inclusive_scan(x, x+3, y, std::plus{}, std::negate{}); + return y[0] == -1 && y[1] == -3 && y[2] == -6; +} + +static_assert(test02()); diff --git a/libstdc++-v3/testsuite/26_numerics/transform_reduce/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/transform_reduce/constexpr.cc new file mode 100644 index 00000000000..eb054c1f8af --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/transform_reduce/constexpr.cc @@ -0,0 +1,55 @@ +// 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 +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include +#include + +constexpr bool +test01() +{ + int x[5] = {1,2,3,4,5}; + int y[5] = {2,4,6,8,10}; + auto ret = std::transform_reduce(x, x+5, y, 0); + return ret == 110; +} + +static_assert(test01()); + +constexpr bool +test02() +{ + int x[5] = {1,2,3,4,5}; + int y[5] = {2,4,6,8,10}; + auto ret = std::transform_reduce(x, x+5, y, 1, + std::multiplies{}, std::plus{}); + return ret == 3*6*9*12*15; +} + +static_assert(test02()); + +constexpr bool +test03() +{ + int x[5] = {1,2,3,4,5}; + auto ret = std::transform_reduce(x, x+5, 0, std::plus{}, std::negate{}); + return ret == -15; +} + +static_assert(test03());