libcxx/test/std/strings/basic.string/string.nonmembers/string_op!=/string_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 // we get this comparison "for free" because the string implicitly converts to the string_view
  12
  13 #include <string>
  14 #include <cassert>
  15
  16 #include "test_macros.h"
  17 #include "min_allocator.h"
  18
  19 template <class S, class SV>
  20 TEST_CONSTEXPR_CXX20 void test(const S& lhs, SV rhs, bool x) {
  21   assert((lhs != rhs) == x);
  22 }
  23
  24 template <class S>
  25 TEST_CONSTEXPR_CXX20 void test_string() {
  26   typedef std::string_view SV;
  27   test(S(""), SV(""), false);
  28   test(S(""), SV("abcde"), true);
  29   test(S(""), SV("abcdefghij"), true);
  30   test(S(""), SV("abcdefghijklmnopqrst"), true);
  31   test(S("abcde"), SV(""), true);
  32   test(S("abcde"), SV("abcde"), false);
  33   test(S("abcde"), SV("abcdefghij"), true);
  34   test(S("abcde"), SV("abcdefghijklmnopqrst"), true);
  35   test(S("abcdefghij"), SV(""), true);
  36   test(S("abcdefghij"), SV("abcde"), true);
  37   test(S("abcdefghij"), SV("abcdefghij"), false);
  38   test(S("abcdefghij"), SV("abcdefghijklmnopqrst"), true);
  39   test(S("abcdefghijklmnopqrst"), SV(""), true);
  40   test(S("abcdefghijklmnopqrst"), SV("abcde"), true);
  41   test(S("abcdefghijklmnopqrst"), SV("abcdefghij"), true);
  42   test(S("abcdefghijklmnopqrst"), SV("abcdefghijklmnopqrst"), false);
  43 }
  44
  45 TEST_CONSTEXPR_CXX20 bool test() {
  46   test_string<std::string>();
  47 #if TEST_STD_VER >= 11
  48   test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
  49 #endif
  50
  51   return true;
  52 }
  53
  54 int main(int, char**) {
  55   test();
  56 #if TEST_STD_VER > 17
  57   static_assert(test());
  58 #endif
  59
  60   return 0;
  61 }