libcxx/test/std/strings/basic.string/string.nonmembers/string_oplt=/pointer_string.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 charT* lhs, const basic_string<charT,traits,Allocator>& 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 typename S::value_type* lhs, const S& rhs, bool x) {
  22   assert((lhs <= rhs) == x);
  23 }
  24
  25 template <class S>
  26 TEST_CONSTEXPR_CXX20 void test_string() {
  27   test("", S(""), true);
  28   test("", S("abcde"), true);
  29   test("", S("abcdefghij"), true);
  30   test("", S("abcdefghijklmnopqrst"), true);
  31   test("abcde", S(""), false);
  32   test("abcde", S("abcde"), true);
  33   test("abcde", S("abcdefghij"), true);
  34   test("abcde", S("abcdefghijklmnopqrst"), true);
  35   test("abcdefghij", S(""), false);
  36   test("abcdefghij", S("abcde"), false);
  37   test("abcdefghij", S("abcdefghij"), true);
  38   test("abcdefghij", S("abcdefghijklmnopqrst"), true);
  39   test("abcdefghijklmnopqrst", S(""), false);
  40   test("abcdefghijklmnopqrst", S("abcde"), false);
  41   test("abcdefghijklmnopqrst", S("abcdefghij"), false);
  42   test("abcdefghijklmnopqrst", S("abcdefghijklmnopqrst"), true);
  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 }