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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // <string>
     11 
     12 // template<class charT, class traits, class Allocator>
     13 //   void swap(basic_string<charT,traits,Allocator>& lhs,
     14 //             basic_string<charT,traits,Allocator>& rhs);
     15 
     16 #include <string>
     17 #include <stdexcept>
     18 #include <algorithm>
     19 #include <cassert>
     20 
     21 #include "test_macros.h"
     22 #include "min_allocator.h"
     23 
     24 template <class S>
     25 void
     26 test(S s1, S s2)
     27 {
     28     S s1_ = s1;
     29     S s2_ = s2;
     30     swap(s1, s2);
     31     LIBCPP_ASSERT(s1.__invariants());
     32     LIBCPP_ASSERT(s2.__invariants());
     33     assert(s1 == s2_);
     34     assert(s2 == s1_);
     35 }
     36 
     37 int main()
     38 {
     39     {
     40     typedef std::string S;
     41     test(S(""), S(""));
     42     test(S(""), S("12345"));
     43     test(S(""), S("1234567890"));
     44     test(S(""), S("12345678901234567890"));
     45     test(S("abcde"), S(""));
     46     test(S("abcde"), S("12345"));
     47     test(S("abcde"), S("1234567890"));
     48     test(S("abcde"), S("12345678901234567890"));
     49     test(S("abcdefghij"), S(""));
     50     test(S("abcdefghij"), S("12345"));
     51     test(S("abcdefghij"), S("1234567890"));
     52     test(S("abcdefghij"), S("12345678901234567890"));
     53     test(S("abcdefghijklmnopqrst"), S(""));
     54     test(S("abcdefghijklmnopqrst"), S("12345"));
     55     test(S("abcdefghijklmnopqrst"), S("1234567890"));
     56     test(S("abcdefghijklmnopqrst"), S("12345678901234567890"));
     57     }
     58 #if TEST_STD_VER >= 11
     59     {
     60     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     61     test(S(""), S(""));
     62     test(S(""), S("12345"));
     63     test(S(""), S("1234567890"));
     64     test(S(""), S("12345678901234567890"));
     65     test(S("abcde"), S(""));
     66     test(S("abcde"), S("12345"));
     67     test(S("abcde"), S("1234567890"));
     68     test(S("abcde"), S("12345678901234567890"));
     69     test(S("abcdefghij"), S(""));
     70     test(S("abcdefghij"), S("12345"));
     71     test(S("abcdefghij"), S("1234567890"));
     72     test(S("abcdefghij"), S("12345678901234567890"));
     73     test(S("abcdefghijklmnopqrst"), S(""));
     74     test(S("abcdefghijklmnopqrst"), S("12345"));
     75     test(S("abcdefghijklmnopqrst"), S("1234567890"));
     76     test(S("abcdefghijklmnopqrst"), S("12345678901234567890"));
     77     }
     78 #endif
     79 }
     80