libcxx/test/std/strings/basic.string/string.modifiers/string_swap/swap.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 // void swap(basic_string& s);
  12
  13 #include <string>
  14 #include <stdexcept>
  15 #include <algorithm>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19 #include "min_allocator.h"
  20
  21 template <class S>
  22 void
  23 test(S s1, S s2)
  24 {
  25     S s1_ = s1;
  26     S s2_ = s2;
  27     s1.swap(s2);
  28     LIBCPP_ASSERT(s1.__invariants());
  29     LIBCPP_ASSERT(s2.__invariants());
  30     assert(s1 == s2_);
  31     assert(s2 == s1_);
  32 }
  33
  34 int main(int, char**)
  35 {
  36     {
  37     typedef std::string S;
  38     test(S(""), S(""));
  39     test(S(""), S("12345"));
  40     test(S(""), S("1234567890"));
  41     test(S(""), S("12345678901234567890"));
  42     test(S("abcde"), S(""));
  43     test(S("abcde"), S("12345"));
  44     test(S("abcde"), S("1234567890"));
  45     test(S("abcde"), S("12345678901234567890"));
  46     test(S("abcdefghij"), S(""));
  47     test(S("abcdefghij"), S("12345"));
  48     test(S("abcdefghij"), S("1234567890"));
  49     test(S("abcdefghij"), S("12345678901234567890"));
  50     test(S("abcdefghijklmnopqrst"), S(""));
  51     test(S("abcdefghijklmnopqrst"), S("12345"));
  52     test(S("abcdefghijklmnopqrst"), S("1234567890"));
  53     test(S("abcdefghijklmnopqrst"), S("12345678901234567890"));
  54     }
  55 #if TEST_STD_VER >= 11
  56     {
  57     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
  58     test(S(""), S(""));
  59     test(S(""), S("12345"));
  60     test(S(""), S("1234567890"));
  61     test(S(""), S("12345678901234567890"));
  62     test(S("abcde"), S(""));
  63     test(S("abcde"), S("12345"));
  64     test(S("abcde"), S("1234567890"));
  65     test(S("abcde"), S("12345678901234567890"));
  66     test(S("abcdefghij"), S(""));
  67     test(S("abcdefghij"), S("12345"));
  68     test(S("abcdefghij"), S("1234567890"));
  69     test(S("abcdefghij"), S("12345678901234567890"));
  70     test(S("abcdefghijklmnopqrst"), S(""));
  71     test(S("abcdefghijklmnopqrst"), S("12345"));
  72     test(S("abcdefghijklmnopqrst"), S("1234567890"));
  73     test(S("abcdefghijklmnopqrst"), S("12345678901234567890"));
  74     }
  75 #endif
  76
  77   return 0;
  78 }