libcxx/test/std/strings/basic.string/string.iterators/iterators.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 // UNSUPPORTED: c++03, c++11
  10
  11 // <string>
  12
  13 // iterator       begin();
  14 // iterator       end();
  15 // const_iterator begin()  const;
  16 // const_iterator end()    const;
  17 // const_iterator cbegin() const;
  18 // const_iterator cend()   const;
  19
  20 #include <string>
  21 #include <cassert>
  22
  23 #include "test_macros.h"
  24
  25 int main(int, char**)
  26 {
  27     { // N3644 testing
  28         typedef std::string C;
  29         C::iterator ii1{}, ii2{};
  30         C::iterator ii4 = ii1;
  31         C::const_iterator cii{};
  32         assert ( ii1 == ii2 );
  33         assert ( ii1 == ii4 );
  34         assert ( ii1 == cii );
  35         assert ( !(ii1 != ii2 ));
  36         assert ( !(ii1 != cii ));
  37     }
  38
  39     { // N3644 testing
  40         typedef std::wstring C;
  41         C::iterator ii1{}, ii2{};
  42         C::iterator ii4 = ii1;
  43         C::const_iterator cii{};
  44         assert ( ii1 == ii2 );
  45         assert ( ii1 == ii4 );
  46         assert ( ii1 == cii );
  47         assert ( !(ii1 != ii2 ));
  48         assert ( !(ii1 != cii ));
  49     }
  50
  51 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
  52     {
  53         typedef std::u8string C;
  54         C::iterator ii1{}, ii2{};
  55         C::iterator ii4 = ii1;
  56         C::const_iterator cii{};
  57         assert ( ii1 == ii2 );
  58         assert ( ii1 == ii4 );
  59         assert ( ii1 == cii );
  60         assert ( !(ii1 != ii2 ));
  61         assert ( !(ii1 != cii ));
  62     }
  63 #endif
  64
  65     { // N3644 testing
  66         typedef std::u16string C;
  67         C::iterator ii1{}, ii2{};
  68         C::iterator ii4 = ii1;
  69         C::const_iterator cii{};
  70         assert ( ii1 == ii2 );
  71         assert ( ii1 == ii4 );
  72         assert ( ii1 == cii );
  73         assert ( !(ii1 != ii2 ));
  74         assert ( !(ii1 != cii ));
  75     }
  76
  77     { // N3644 testing
  78         typedef std::u32string C;
  79         C::iterator ii1{}, ii2{};
  80         C::iterator ii4 = ii1;
  81         C::const_iterator cii{};
  82         assert ( ii1 == ii2 );
  83         assert ( ii1 == ii4 );
  84         assert ( ii1 == cii );
  85         assert ( !(ii1 != ii2 ));
  86         assert ( !(ii1 != cii ));
  87     }
  88
  89   return 0;
  90 }