libcxx/test/std/strings/string.view/string.view.comparison/ople.string_view.string_view.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 // <string>
  10
  11 // template<class charT, class traits>
  12 //   constexpr bool operator<=(basic_string_view<charT,traits> lhs,
  13 //                  basic_string_view<charT,traits> rhs);
  14
  15 #include <string_view>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19 #include "constexpr_char_traits.h"
  20
  21 template <class S>
  22 void
  23 test(const S& lhs, const S& rhs, bool x, bool y)
  24 {
  25     assert((lhs <= rhs) == x);
  26     assert((rhs <= lhs) == y);
  27 }
  28
  29 int main(int, char**)
  30 {
  31     {
  32     typedef std::string_view S;
  33     test(S(""), S(""), true, true);
  34     test(S(""), S("abcde"), true, false);
  35     test(S(""), S("abcdefghij"), true, false);
  36     test(S(""), S("abcdefghijklmnopqrst"), true, false);
  37     test(S("abcde"), S(""), false, true);
  38     test(S("abcde"), S("abcde"), true, true);
  39     test(S("abcde"), S("abcdefghij"), true, false);
  40     test(S("abcde"), S("abcdefghijklmnopqrst"), true, false);
  41     test(S("abcdefghij"), S(""), false, true);
  42     test(S("abcdefghij"), S("abcde"), false, true);
  43     test(S("abcdefghij"), S("abcdefghij"), true, true);
  44     test(S("abcdefghij"), S("abcdefghijklmnopqrst"), true, false);
  45     test(S("abcdefghijklmnopqrst"), S(""), false, true);
  46     test(S("abcdefghijklmnopqrst"), S("abcde"), false, true);
  47     test(S("abcdefghijklmnopqrst"), S("abcdefghij"), false, true);
  48     test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), true, true);
  49     }
  50
  51 #if TEST_STD_VER > 11
  52     {
  53     typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
  54     constexpr SV  sv1;
  55     constexpr SV  sv2 { "abcde", 5 };
  56
  57     static_assert (  sv1 <= sv1,  "" );
  58     static_assert (  sv2 <= sv2,  "" );
  59
  60     static_assert (  sv1 <= sv2,  "" );
  61     static_assert (!(sv2 <= sv1), "" );
  62     }
  63 #endif
  64
  65   return 0;
  66 }