libcxx/test/std/containers/sequences/vector.bool/find.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 // <vector>
  10 // vector<bool>
  11
  12 // std::find with vector<bool>::iterator
  13
  14 // https://llvm.org/PR16816
  15
  16 #include <vector>
  17 #include <algorithm>
  18 #include <cassert>
  19 #include <cstddef>
  20
  21 #include "test_macros.h"
  22
  23 TEST_CONSTEXPR_CXX20 bool tests()
  24 {
  25     {
  26         for (unsigned i = 1; i < 256; ++i)
  27         {
  28             std::vector<bool> b(i,true);
  29             std::vector<bool>::iterator j = std::find(b.begin()+1, b.end(), false);
  30             assert(static_cast<std::size_t>(j-b.begin()) == i);
  31             assert(b.end() == j);
  32         }
  33     }
  34     {
  35         for (unsigned i = 1; i < 256; ++i)
  36         {
  37             std::vector<bool> b(i,false);
  38             std::vector<bool>::iterator j = std::find(b.begin()+1, b.end(), true);
  39             assert(static_cast<std::size_t>(j-b.begin()) == i);
  40             assert(b.end() == j);
  41         }
  42     }
  43
  44     return true;
  45 }
  46
  47 int main(int, char**)
  48 {
  49     tests();
  50 #if TEST_STD_VER > 17
  51     static_assert(tests());
  52 #endif
  53     return 0;
  54 }