libcxx/test/std/strings/basic.string/string.cons/move_assignment.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<charT,traits,Allocator>&
  14 //   operator=(basic_string<charT,traits,Allocator>&& str); // constexpr since C++20
  15
  16 #include <string>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20 #include "test_allocator.h"
  21 #include "min_allocator.h"
  22 #include "asan_testing.h"
  23
  24 template <class S>
  25 TEST_CONSTEXPR_CXX20 void test(S s1, S s2) {
  26   S s0 = s2;
  27   s1   = std::move(s2);
  28   LIBCPP_ASSERT(s1.__invariants());
  29   LIBCPP_ASSERT(s2.__invariants());
  30   assert(s1 == s0);
  31   assert(s1.capacity() >= s1.size());
  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 S>
  38 TEST_CONSTEXPR_CXX20 void test_string() {
  39   test(S(), S());
  40   test(S("1"), S());
  41   test(S(), S("1"));
  42   test(S("1"), S("2"));
  43   test(S("1"), S("2"));
  44
  45   test(S(), S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
  46   test(S("123456789"), S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
  47   test(S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"), S("123456789"));
  48   test(S("1234567890123456789012345678901234567890123456789012345678901234567890"),
  49        S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
  50   test(S("1234567890123456789012345678901234567890123456789012345678901234567890"
  51          "1234567890123456789012345678901234567890123456789012345678901234567890"),
  52        S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
  53 }
  54
  55 TEST_CONSTEXPR_CXX20 bool test() {
  56   test_string<std::string>();
  57 #if TEST_STD_VER >= 11
  58   test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
  59   test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
  60 #endif
  61
  62   return true;
  63 }
  64
  65 int main(int, char**) {
  66   test();
  67 #if TEST_STD_VER > 17
  68   static_assert(test());
  69 #endif
  70
  71   return 0;
  72 }