text: //===----------------------------------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  // XFAIL: LIBCXX-AIX-FIXME
  
  // <string>
  
  // basic_string<charT,traits,Allocator>&
  //   insert(size_type pos, const charT* s); // constexpr since C++20
  
  #include <string>
  #include <stdexcept>
  #include <cassert>
  
  #include "test_macros.h"
  #include "min_allocator.h"
  
  template <class S>
  TEST_CONSTEXPR_CXX20 void
  test(S s, typename S::size_type pos, const typename S::value_type* str, S expected)
  {
      const typename S::size_type old_size = s.size();
      S s0 = s;
      if (pos <= old_size)
      {
          s.insert(pos, str);
          LIBCPP_ASSERT(s.__invariants());
          assert(s == expected);
      }
  #ifndef TEST_HAS_NO_EXCEPTIONS
      else if (!TEST_IS_CONSTANT_EVALUATED)
      {
          try
          {
              s.insert(pos, str);
              assert(false);
          }
          catch (std::out_of_range&)
          {
              assert(pos > old_size);
              assert(s == s0);
          }
      }
  #endif
  }
  
  TEST_CONSTEXPR_CXX20 bool test() {
    {
      typedef std::string S;
      test(S(""), 0, "", S(""));
      test(S(""), 0, "12345", S("12345"));
      test(S(""), 0, "1234567890", S("1234567890"));
      test(S(""), 0, "12345678901234567890", S("12345678901234567890"));
      test(S(""), 1, "", S("can't happen"));
      test(S(""), 1, "12345", S("can't happen"));
      test(S(""), 1, "1234567890", S("can't happen"));
      test(S(""), 1, "12345678901234567890", S("can't happen"));
      test(S("abcde"), 0, "", S("abcde"));
      test(S("abcde"), 0, "12345", S("12345abcde"));
      test(S("abcde"), 0, "1234567890", S("1234567890abcde"));
      test(S("abcde"), 0, "12345678901234567890", S("12345678901234567890abcde"));
      test(S("abcde"), 1, "", S("abcde"));
      test(S("abcde"), 1, "12345", S("a12345bcde"));
      test(S("abcde"), 1, "1234567890", S("a1234567890bcde"));
      test(S("abcde"), 1, "12345678901234567890", S("a12345678901234567890bcde"));
      test(S("abcde"), 2, "", S("abcde"));
      test(S("abcde"), 2, "12345", S("ab12345cde"));
      test(S("abcde"), 2, "1234567890", S("ab1234567890cde"));
      test(S("abcde"), 2, "12345678901234567890", S("ab12345678901234567890cde"));
      test(S("abcde"), 4, "", S("abcde"));
      test(S("abcde"), 4, "12345", S("abcd12345e"));
      test(S("abcde"), 4, "1234567890", S("abcd1234567890e"));
      test(S("abcde"), 4, "12345678901234567890", S("abcd12345678901234567890e"));
      test(S("abcde"), 5, "", S("abcde"));
      test(S("abcde"), 5, "12345", S("abcde12345"));
      test(S("abcde"), 5, "1234567890", S("abcde1234567890"));
      test(S("abcde"), 5, "12345678901234567890", S("abcde12345678901234567890"));
      test(S("abcde"), 6, "", S("can't happen"));
      test(S("abcde"), 6, "12345", S("can't happen"));
      test(S("abcde"), 6, "1234567890", S("can't happen"));
      test(S("abcde"), 6, "12345678901234567890", S("can't happen"));
      test(S("abcdefghij"), 0, "", S("abcdefghij"));
      test(S("abcdefghij"), 0, "12345", S("12345abcdefghij"));
      test(S("abcdefghij"), 0, "1234567890", S("1234567890abcdefghij"));
      test(S("abcdefghij"), 0, "12345678901234567890", S("12345678901234567890abcdefghij"));
      test(S("abcdefghij"), 1, "", S("abcdefghij"));
      test(S("abcdefghij"), 1, "12345", S("a12345bcdefghij"));
      test(S("abcdefghij"), 1, "1234567890", S("a1234567890bcdefghij"));
      test(S("abcdefghij"), 1, "12345678901234567890", S("a12345678901234567890bcdefghij"));
      test(S("abcdefghij"), 5, "", S("abcdefghij"));
      test(S("abcdefghij"), 5, "12345", S("abcde12345fghij"));
      test(S("abcdefghij"), 5, "1234567890", S("abcde1234567890fghij"));
      test(S("abcdefghij"), 5, "12345678901234567890", S("abcde12345678901234567890fghij"));
      test(S("abcdefghij"), 9, "", S("abcdefghij"));
      test(S("abcdefghij"), 9, "12345", S("abcdefghi12345j"));
      test(S("abcdefghij"), 9, "1234567890", S("abcdefghi1234567890j"));
      test(S("abcdefghij"), 9, "12345678901234567890", S("abcdefghi12345678901234567890j"));
      test(S("abcdefghij"), 10, "", S("abcdefghij"));
      test(S("abcdefghij"), 10, "12345", S("abcdefghij12345"));
      test(S("abcdefghij"), 10, "1234567890", S("abcdefghij1234567890"));
      test(S("abcdefghij"), 10, "12345678901234567890", S("abcdefghij12345678901234567890"));
      test(S("abcdefghij"), 11, "", S("can't happen"));
      test(S("abcdefghij"), 11, "12345", S("can't happen"));
      test(S("abcdefghij"), 11, "1234567890", S("can't happen"));
      test(S("abcdefghij"), 11, "12345678901234567890", S("can't happen"));
      test(S("abcdefghijklmnopqrst"), 0, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 0, "12345", S("12345abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 0, "1234567890", S("1234567890abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 0, "12345678901234567890", S("12345678901234567890abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 1, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 1, "12345", S("a12345bcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 1, "1234567890", S("a1234567890bcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 1, "12345678901234567890", S("a12345678901234567890bcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 10, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 10, "12345", S("abcdefghij12345klmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 10, "1234567890", S("abcdefghij1234567890klmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 10, "12345678901234567890", S("abcdefghij12345678901234567890klmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 19, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 19, "12345", S("abcdefghijklmnopqrs12345t"));
      test(S("abcdefghijklmnopqrst"), 19, "1234567890", S("abcdefghijklmnopqrs1234567890t"));
      test(S("abcdefghijklmnopqrst"), 19, "12345678901234567890", S("abcdefghijklmnopqrs12345678901234567890t"));
      test(S("abcdefghijklmnopqrst"), 20, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 20, "12345", S("abcdefghijklmnopqrst12345"));
      test(S("abcdefghijklmnopqrst"), 20, "1234567890", S("abcdefghijklmnopqrst1234567890"));
      test(S("abcdefghijklmnopqrst"), 20, "12345678901234567890", S("abcdefghijklmnopqrst12345678901234567890"));
      test(S("abcdefghijklmnopqrst"), 21, "", S("can't happen"));
      test(S("abcdefghijklmnopqrst"), 21, "12345", S("can't happen"));
      test(S("abcdefghijklmnopqrst"), 21, "1234567890", S("can't happen"));
      test(S("abcdefghijklmnopqrst"), 21, "12345678901234567890", S("can't happen"));
    }
  #if TEST_STD_VER >= 11
    {
      typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
      test(S(""), 0, "", S(""));
      test(S(""), 0, "12345", S("12345"));
      test(S(""), 0, "1234567890", S("1234567890"));
      test(S(""), 0, "12345678901234567890", S("12345678901234567890"));
      test(S(""), 1, "", S("can't happen"));
      test(S(""), 1, "12345", S("can't happen"));
      test(S(""), 1, "1234567890", S("can't happen"));
      test(S(""), 1, "12345678901234567890", S("can't happen"));
      test(S("abcde"), 0, "", S("abcde"));
      test(S("abcde"), 0, "12345", S("12345abcde"));
      test(S("abcde"), 0, "1234567890", S("1234567890abcde"));
      test(S("abcde"), 0, "12345678901234567890", S("12345678901234567890abcde"));
      test(S("abcde"), 1, "", S("abcde"));
      test(S("abcde"), 1, "12345", S("a12345bcde"));
      test(S("abcde"), 1, "1234567890", S("a1234567890bcde"));
      test(S("abcde"), 1, "12345678901234567890", S("a12345678901234567890bcde"));
      test(S("abcde"), 2, "", S("abcde"));
      test(S("abcde"), 2, "12345", S("ab12345cde"));
      test(S("abcde"), 2, "1234567890", S("ab1234567890cde"));
      test(S("abcde"), 2, "12345678901234567890", S("ab12345678901234567890cde"));
      test(S("abcde"), 4, "", S("abcde"));
      test(S("abcde"), 4, "12345", S("abcd12345e"));
      test(S("abcde"), 4, "1234567890", S("abcd1234567890e"));
      test(S("abcde"), 4, "12345678901234567890", S("abcd12345678901234567890e"));
      test(S("abcde"), 5, "", S("abcde"));
      test(S("abcde"), 5, "12345", S("abcde12345"));
      test(S("abcde"), 5, "1234567890", S("abcde1234567890"));
      test(S("abcde"), 5, "12345678901234567890", S("abcde12345678901234567890"));
      test(S("abcde"), 6, "", S("can't happen"));
      test(S("abcde"), 6, "12345", S("can't happen"));
      test(S("abcde"), 6, "1234567890", S("can't happen"));
      test(S("abcde"), 6, "12345678901234567890", S("can't happen"));
      test(S("abcdefghij"), 0, "", S("abcdefghij"));
      test(S("abcdefghij"), 0, "12345", S("12345abcdefghij"));
      test(S("abcdefghij"), 0, "1234567890", S("1234567890abcdefghij"));
      test(S("abcdefghij"), 0, "12345678901234567890", S("12345678901234567890abcdefghij"));
      test(S("abcdefghij"), 1, "", S("abcdefghij"));
      test(S("abcdefghij"), 1, "12345", S("a12345bcdefghij"));
      test(S("abcdefghij"), 1, "1234567890", S("a1234567890bcdefghij"));
      test(S("abcdefghij"), 1, "12345678901234567890", S("a12345678901234567890bcdefghij"));
      test(S("abcdefghij"), 5, "", S("abcdefghij"));
      test(S("abcdefghij"), 5, "12345", S("abcde12345fghij"));
      test(S("abcdefghij"), 5, "1234567890", S("abcde1234567890fghij"));
      test(S("abcdefghij"), 5, "12345678901234567890", S("abcde12345678901234567890fghij"));
      test(S("abcdefghij"), 9, "", S("abcdefghij"));
      test(S("abcdefghij"), 9, "12345", S("abcdefghi12345j"));
      test(S("abcdefghij"), 9, "1234567890", S("abcdefghi1234567890j"));
      test(S("abcdefghij"), 9, "12345678901234567890", S("abcdefghi12345678901234567890j"));
      test(S("abcdefghij"), 10, "", S("abcdefghij"));
      test(S("abcdefghij"), 10, "12345", S("abcdefghij12345"));
      test(S("abcdefghij"), 10, "1234567890", S("abcdefghij1234567890"));
      test(S("abcdefghij"), 10, "12345678901234567890", S("abcdefghij12345678901234567890"));
      test(S("abcdefghij"), 11, "", S("can't happen"));
      test(S("abcdefghij"), 11, "12345", S("can't happen"));
      test(S("abcdefghij"), 11, "1234567890", S("can't happen"));
      test(S("abcdefghij"), 11, "12345678901234567890", S("can't happen"));
      test(S("abcdefghijklmnopqrst"), 0, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 0, "12345", S("12345abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 0, "1234567890", S("1234567890abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 0, "12345678901234567890", S("12345678901234567890abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 1, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 1, "12345", S("a12345bcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 1, "1234567890", S("a1234567890bcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 1, "12345678901234567890", S("a12345678901234567890bcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 10, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 10, "12345", S("abcdefghij12345klmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 10, "1234567890", S("abcdefghij1234567890klmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 10, "12345678901234567890", S("abcdefghij12345678901234567890klmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 19, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 19, "12345", S("abcdefghijklmnopqrs12345t"));
      test(S("abcdefghijklmnopqrst"), 19, "1234567890", S("abcdefghijklmnopqrs1234567890t"));
      test(S("abcdefghijklmnopqrst"), 19, "12345678901234567890", S("abcdefghijklmnopqrs12345678901234567890t"));
      test(S("abcdefghijklmnopqrst"), 20, "", S("abcdefghijklmnopqrst"));
      test(S("abcdefghijklmnopqrst"), 20, "12345", S("abcdefghijklmnopqrst12345"));
      test(S("abcdefghijklmnopqrst"), 20, "1234567890", S("abcdefghijklmnopqrst1234567890"));
      test(S("abcdefghijklmnopqrst"), 20, "12345678901234567890", S("abcdefghijklmnopqrst12345678901234567890"));
      test(S("abcdefghijklmnopqrst"), 21, "", S("can't happen"));
      test(S("abcdefghijklmnopqrst"), 21, "12345", S("can't happen"));
      test(S("abcdefghijklmnopqrst"), 21, "1234567890", S("can't happen"));
      test(S("abcdefghijklmnopqrst"), 21, "12345678901234567890", S("can't happen"));
    }
  #endif
  
    { // test inserting into self
      typedef std::string S;
      S s_short = "123/";
      S s_long  = "Lorem ipsum dolor sit amet, consectetur/";
  
      s_short.insert(0, s_short.c_str());
      assert(s_short == "123/123/");
      s_short.insert(0, s_short.c_str());
      assert(s_short == "123/123/123/123/");
      s_short.insert(0, s_short.c_str());
      assert(s_short == "123/123/123/123/123/123/123/123/");
  
      s_long.insert(0, s_long.c_str());
      assert(s_long == "Lorem ipsum dolor sit amet, consectetur/Lorem ipsum dolor sit amet, consectetur/");
    }
  
    return true;
  }
  
  int main(int, char**)
  {
    test();
  #if TEST_STD_VER > 17
    static_assert(test());
  #endif
  
    return 0;
  }
  