libstdc++-v3/testsuite/25_algorithms/clamp/2.cc

   1 // { dg-do run { target c++17 } }
   2
   3 // Copyright (C) 2000-2025 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <algorithm>
  21 #include <functional>
  22 #include <testsuite_hooks.h>
  23
  24 template<typename T>
  25   struct A { static const T a; };
  26
  27 template<typename T>
  28 const T A<T>::a = T(3);
  29
  30 void test02()
  31 {
  32   VERIFY( 3 == std::clamp(A<int>::a, 2, 4) );
  33   VERIFY( 2 == std::clamp(A<int>::a, 1, 2) );
  34   VERIFY( 4 == std::clamp(A<int>::a, 4, 6) );
  35
  36   VERIFY( 3u == std::clamp(A<unsigned int>::a, 2u, 4u) );
  37   VERIFY( 2u == std::clamp(A<unsigned int>::a, 1u, 2u) );
  38   VERIFY( 4u == std::clamp(A<unsigned int>::a, 4u, 6u) );
  39
  40   VERIFY( 3l == std::clamp(A<long>::a, 2l, 4l) );
  41   VERIFY( 2l == std::clamp(A<long>::a, 1l, 2l) );
  42   VERIFY( 4l == std::clamp(A<long>::a, 4l, 6l) );
  43
  44   VERIFY( 3ul == std::clamp(A<unsigned long>::a, 2ul, 4ul) );
  45   VERIFY( 2ul == std::clamp(A<unsigned long>::a, 1ul, 2ul) );
  46   VERIFY( 4ul == std::clamp(A<unsigned long>::a, 4ul, 6ul) );
  47
  48 #ifdef _GLIBCXX_USE_LONG_LONG
  49   VERIFY( 3ll == std::clamp(A<long long>::a, 2ll, 4ll) );
  50   VERIFY( 2ll == std::clamp(A<long long>::a, 1ll, 2ll) );
  51   VERIFY( 4ll == std::clamp(A<long long>::a, 4ll, 6ll) );
  52
  53   VERIFY( 3ull == std::clamp(A<unsigned long long>::a, 2ull, 4ull) );
  54   VERIFY( 2ull == std::clamp(A<unsigned long long>::a, 1ull, 2ull) );
  55   VERIFY( 4ull == std::clamp(A<unsigned long long>::a, 4ull, 6ull) );
  56 #endif
  57
  58   VERIFY( (short)3 == std::clamp(A<short>::a, (short)2, (short)4) );
  59   VERIFY( (short)2 == std::clamp(A<short>::a, (short)1, (short)2) );
  60   VERIFY( (short)4 == std::clamp(A<short>::a, (short)4, (short)6) );
  61
  62   VERIFY( (unsigned short)3 == std::clamp(A<unsigned short>::a, (unsigned short)2, (unsigned short)4) );
  63   VERIFY( (unsigned short)2 == std::clamp(A<unsigned short>::a, (unsigned short)1, (unsigned short)2) );
  64   VERIFY( (unsigned short)4 == std::clamp(A<unsigned short>::a, (unsigned short)4, (unsigned short)6) );
  65
  66   VERIFY( (char)3 == std::clamp(A<char>::a, (char)2, (char)4) );
  67   VERIFY( (char)2 == std::clamp(A<char>::a, (char)1, (char)2) );
  68   VERIFY( (char)4 == std::clamp(A<char>::a, (char)4, (char)6) );
  69
  70   VERIFY( (signed char)3 == std::clamp(A<signed char>::a, (signed char)2, (signed char)4) );
  71   VERIFY( (signed char)2 == std::clamp(A<signed char>::a, (signed char)1, (signed char)2) );
  72   VERIFY( (signed char)4 == std::clamp(A<signed char>::a, (signed char)4, (signed char)6) );
  73
  74   VERIFY( (unsigned char)3 == std::clamp(A<unsigned char>::a, (unsigned char)2, (unsigned char)4) );
  75   VERIFY( (unsigned char)2 == std::clamp(A<unsigned char>::a, (unsigned char)1, (unsigned char)2) );
  76   VERIFY( (unsigned char)4 == std::clamp(A<unsigned char>::a, (unsigned char)4, (unsigned char)6) );
  77
  78   VERIFY( (wchar_t)3 == std::clamp(A<wchar_t>::a, (wchar_t)2, (wchar_t)4) );
  79   VERIFY( (wchar_t)2 == std::clamp(A<wchar_t>::a, (wchar_t)1, (wchar_t)2) );
  80   VERIFY( (wchar_t)4 == std::clamp(A<wchar_t>::a, (wchar_t)4, (wchar_t)6) );
  81
  82   VERIFY( 3.0 == std::clamp(A<double>::a, 2.0, 4.0) );
  83   VERIFY( 2.0 == std::clamp(A<double>::a, 1.0, 2.0) );
  84   VERIFY( 4.0 == std::clamp(A<double>::a, 4.0, 6.0) );
  85
  86   VERIFY( 3.0f == std::clamp(A<float>::a, 2.0f, 4.0f) );
  87   VERIFY( 2.0f == std::clamp(A<float>::a, 1.0f, 2.0f) );
  88   VERIFY( 4.0f == std::clamp(A<float>::a, 4.0f, 6.0f) );
  89
  90   VERIFY( 3.0l == std::clamp(A<long double>::a, 2.0l, 4.0l) );
  91   VERIFY( 2.0l == std::clamp(A<long double>::a, 1.0l, 2.0l) );
  92   VERIFY( 4.0l == std::clamp(A<long double>::a, 4.0l, 6.0l) );
  93 }
  94
  95 int
  96 main()
  97 {
  98   test02();
  99   return 0;
 100 }