libcxx/test/std/language.support/support.limits/limits/numeric.limits.members/min.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // test numeric_limits
  10
  11 // min()
  12
  13 #include <limits>
  14 #include <climits>
  15 #include <cfloat>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  21 #   include <cwchar>
  22 #endif
  23
  24 template <class T>
  25 void
  26 test(T expected)
  27 {
  28     assert(std::numeric_limits<T>::min() == expected);
  29     assert(std::numeric_limits<T>::is_bounded || !std::numeric_limits<T>::is_signed);
  30     assert(std::numeric_limits<const T>::min() == expected);
  31     assert(std::numeric_limits<const T>::is_bounded || !std::numeric_limits<const T>::is_signed);
  32     assert(std::numeric_limits<volatile T>::min() == expected);
  33     assert(std::numeric_limits<volatile T>::is_bounded || !std::numeric_limits<volatile T>::is_signed);
  34     assert(std::numeric_limits<const volatile T>::min() == expected);
  35     assert(std::numeric_limits<const volatile T>::is_bounded || !std::numeric_limits<const volatile T>::is_signed);
  36 }
  37
  38 int main(int, char**)
  39 {
  40     test<bool>(false);
  41     test<char>(CHAR_MIN);
  42     test<signed char>(SCHAR_MIN);
  43     test<unsigned char>(0);
  44 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  45     test<wchar_t>(WCHAR_MIN);
  46 #endif
  47 #if TEST_STD_VER > 17 && defined(__cpp_char8_t)
  48     test<char8_t>(0);
  49 #endif
  50     test<char16_t>(0);
  51     test<char32_t>(0);
  52     test<short>(SHRT_MIN);
  53     test<unsigned short>(0);
  54     test<int>(INT_MIN);
  55     test<unsigned int>(0);
  56     test<long>(LONG_MIN);
  57     test<unsigned long>(0);
  58     test<long long>(LLONG_MIN);
  59     test<unsigned long long>(0);
  60 #ifndef TEST_HAS_NO_INT128
  61     test<__int128_t>(-__int128_t(__uint128_t(-1)/2) - 1);
  62     test<__uint128_t>(0);
  63 #endif
  64     test<float>(FLT_MIN);
  65     test<double>(DBL_MIN);
  66     test<long double>(LDBL_MIN);
  67
  68   return 0;
  69 }