libcxx/test/std/strings/basic.string/string.cons/move.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
  10
  11 // <string>
  12
  13 // basic_string(basic_string<charT,traits,Allocator>&& str); // constexpr since C++20
  14
  15 #include <string>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19 #include "test_allocator.h"
  20 #include "min_allocator.h"
  21 #include "asan_testing.h"
  22
  23 template <class S>
  24 TEST_CONSTEXPR_CXX20 void test(S s0) {
  25   S s1 = s0;
  26   S s2 = std::move(s0);
  27   LIBCPP_ASSERT(s2.__invariants());
  28   LIBCPP_ASSERT(s0.__invariants());
  29   assert(s2 == s1);
  30   assert(s2.capacity() >= s2.size());
  31   assert(s2.get_allocator() == s1.get_allocator());
  32   LIBCPP_ASSERT(is_string_asan_correct(s0));
  33   LIBCPP_ASSERT(is_string_asan_correct(s1));
  34   LIBCPP_ASSERT(is_string_asan_correct(s2));
  35 }
  36
  37 template <class Alloc>
  38 TEST_CONSTEXPR_CXX20 void test_string(Alloc const& a) {
  39   using S = std::basic_string<char, std::char_traits<char>, Alloc>;
  40   test(S(Alloc(a)));
  41   test(S("1", Alloc(a)));
  42   test(S("1234567890123456789012345678901234567890123456789012345678901234567890", Alloc(a)));
  43 }
  44
  45 TEST_CONSTEXPR_CXX20 bool test() {
  46   test_string(std::allocator<char>());
  47   test_string(test_allocator<char>());
  48   test_string(test_allocator<char>(3));
  49   test_string(min_allocator<char>());
  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 }