libcxx/test/std/strings/basic.string/string.nonmembers/string_opgt/string_pointer.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, class Allocator>
  12 //   bool operator>(const basic_string<charT,traits,Allocator>& lhs, const charT* rhs); // constexpr since C++20
  13
  14 #include <string>
  15 #include <cassert>
  16
  17 #include "test_macros.h"
  18 #include "min_allocator.h"
  19
  20 template <class S>
  21 TEST_CONSTEXPR_CXX20 void test(const S& lhs, const typename S::value_type* rhs, bool x) {
  22   assert((lhs > rhs) == x);
  23 }
  24
  25 template <class S>
  26 TEST_CONSTEXPR_CXX20 void test_string() {
  27   test(S(""), "", false);
  28   test(S(""), "abcde", false);
  29   test(S(""), "abcdefghij", false);
  30   test(S(""), "abcdefghijklmnopqrst", false);
  31   test(S("abcde"), "", true);
  32   test(S("abcde"), "abcde", false);
  33   test(S("abcde"), "abcdefghij", false);
  34   test(S("abcde"), "abcdefghijklmnopqrst", false);
  35   test(S("abcdefghij"), "", true);
  36   test(S("abcdefghij"), "abcde", true);
  37   test(S("abcdefghij"), "abcdefghij", false);
  38   test(S("abcdefghij"), "abcdefghijklmnopqrst", false);
  39   test(S("abcdefghijklmnopqrst"), "", true);
  40   test(S("abcdefghijklmnopqrst"), "abcde", true);
  41   test(S("abcdefghijklmnopqrst"), "abcdefghij", true);
  42   test(S("abcdefghijklmnopqrst"), "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 }