libcxx/test/std/utilities/template.bitset/bitset.cons/char_ptr_ctor.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 // template <class charT>
  10 //     explicit bitset(const charT* str,
  11 //                     typename basic_string_view<charT>::size_type n = basic_string_view<charT>::npos, // s/string/string_view since C++26
  12 //                     charT zero = charT('0'), charT one = charT('1')); // constexpr since C++23
  13
  14 #include <bitset>
  15 #include <algorithm> // for 'min' and 'max'
  16 #include <cassert>
  17 #include <stdexcept> // for 'invalid_argument'
  18 #include <type_traits>
  19
  20 #include "test_macros.h"
  21
  22 TEST_MSVC_DIAGNOSTIC_IGNORED(6294) // Ill-defined for-loop:  initial condition does not satisfy test.  Loop body not executed.
  23
  24 template <std::size_t N>
  25 TEST_CONSTEXPR_CXX23 void test_char_pointer_ctor()
  26 {
  27 #ifndef TEST_HAS_NO_EXCEPTIONS
  28   if (!TEST_IS_CONSTANT_EVALUATED) {
  29     try {
  30       std::bitset<N> v("xxx1010101010xxxx");
  31       assert(false);
  32     }
  33     catch (std::invalid_argument&) {}
  34   }
  35 #endif
  36
  37   static_assert(!std::is_convertible<const char*, std::bitset<N> >::value, "");
  38   static_assert(std::is_constructible<std::bitset<N>, const char*>::value, "");
  39   {
  40     const char s[] = "1010101010";
  41     std::bitset<N> v(s);
  42     std::size_t M = std::min<std::size_t>(v.size(), 10);
  43     for (std::size_t i = 0; i < M; ++i)
  44         assert(v[i] == (s[M - 1 - i] == '1'));
  45     for (std::size_t i = 10; i < v.size(); ++i)
  46         assert(v[i] == false);
  47   }
  48   {
  49     const char s[] = "1010101010";
  50     std::bitset<N> v(s, 10);
  51     std::size_t M = std::min<std::size_t>(v.size(), 10);
  52     for (std::size_t i = 0; i < M; ++i)
  53         assert(v[i] == (s[M - 1 - i] == '1'));
  54     for (std::size_t i = 10; i < v.size(); ++i)
  55         assert(v[i] == false);
  56   }
  57   {
  58     const char s[] = "1a1a1a1a1a";
  59     std::bitset<N> v(s, 10, 'a');
  60     std::size_t M = std::min<std::size_t>(v.size(), 10);
  61     for (std::size_t i = 0; i < M; ++i)
  62         assert(v[i] == (s[M - 1 - i] == '1'));
  63     for (std::size_t i = 10; i < v.size(); ++i)
  64         assert(v[i] == false);
  65   }
  66   {
  67     const char s[] = "bababababa";
  68     std::bitset<N> v(s, 10, 'a', 'b');
  69     std::size_t M = std::min<std::size_t>(v.size(), 10);
  70     for (std::size_t i = 0; i < M; ++i)
  71         assert(v[i] == (s[M - 1 - i] == 'b'));
  72     for (std::size_t i = 10; i < v.size(); ++i)
  73         assert(v[i] == false);
  74   }
  75 }
  76
  77 TEST_CONSTEXPR_CXX23 bool test() {
  78   test_char_pointer_ctor<0>();
  79   test_char_pointer_ctor<1>();
  80   test_char_pointer_ctor<31>();
  81   test_char_pointer_ctor<32>();
  82   test_char_pointer_ctor<33>();
  83   test_char_pointer_ctor<63>();
  84   test_char_pointer_ctor<64>();
  85   test_char_pointer_ctor<65>();
  86   test_char_pointer_ctor<1000>();
  87
  88   return true;
  89 }
  90
  91 int main(int, char**)
  92 {
  93   test();
  94 #if TEST_STD_VER > 20
  95   static_assert(test());
  96 #endif
  97
  98   return 0;
  99 }