//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <string>

// basic_string<charT,traits,Allocator>&
//   insert(size_type pos1, const basic_string& str);

#include <string>
#include <stdexcept>
#include <cassert>

#include "test_macros.h"
#include "min_allocator.h"

template <class S>
void
test(S s, typename S::size_type pos, S 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
    {
        try
        {
            s.insert(pos, str);
            assert(false);
        }
        catch (std::out_of_range&)
        {
            assert(pos > old_size);
            assert(s == s0);
        }
    }
#endif
}

int main()
{
    {
    typedef std::string S;
    test(S(""), 0, S(""), S(""));
    test(S(""), 0, S("12345"), S("12345"));
    test(S(""), 0, S("1234567890"), S("1234567890"));
    test(S(""), 0, S("12345678901234567890"), S("12345678901234567890"));
    test(S(""), 1, S(""), S("can't happen"));
    test(S(""), 1, S("12345"), S("can't happen"));
    test(S(""), 1, S("1234567890"), S("can't happen"));
    test(S(""), 1, S("12345678901234567890"), S("can't happen"));
    test(S("abcde"), 0, S(""), S("abcde"));
    test(S("abcde"), 0, S("12345"), S("12345abcde"));
    test(S("abcde"), 0, S("1234567890"), S("1234567890abcde"));
    test(S("abcde"), 0, S("12345678901234567890"), S("12345678901234567890abcde"));
    test(S("abcde"), 1, S(""), S("abcde"));
    test(S("abcde"), 1, S("12345"), S("a12345bcde"));
    test(S("abcde"), 1, S("1234567890"), S("a1234567890bcde"));
    test(S("abcde"), 1, S("12345678901234567890"), S("a12345678901234567890bcde"));
    test(S("abcde"), 2, S(""), S("abcde"));
    test(S("abcde"), 2, S("12345"), S("ab12345cde"));
    test(S("abcde"), 2, S("1234567890"), S("ab1234567890cde"));
    test(S("abcde"), 2, S("12345678901234567890"), S("ab12345678901234567890cde"));
    test(S("abcde"), 4, S(""), S("abcde"));
    test(S("abcde"), 4, S("12345"), S("abcd12345e"));
    test(S("abcde"), 4, S("1234567890"), S("abcd1234567890e"));
    test(S("abcde"), 4, S("12345678901234567890"), S("abcd12345678901234567890e"));
    test(S("abcde"), 5, S(""), S("abcde"));
    test(S("abcde"), 5, S("12345"), S("abcde12345"));
    test(S("abcde"), 5, S("1234567890"), S("abcde1234567890"));
    test(S("abcde"), 5, S("12345678901234567890"), S("abcde12345678901234567890"));
    test(S("abcde"), 6, S(""), S("can't happen"));
    test(S("abcde"), 6, S("12345"), S("can't happen"));
    test(S("abcde"), 6, S("1234567890"), S("can't happen"));
    test(S("abcde"), 6, S("12345678901234567890"), S("can't happen"));
    test(S("abcdefghij"), 0, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 0, S("12345"), S("12345abcdefghij"));
    test(S("abcdefghij"), 0, S("1234567890"), S("1234567890abcdefghij"));
    test(S("abcdefghij"), 0, S("12345678901234567890"), S("12345678901234567890abcdefghij"));
    test(S("abcdefghij"), 1, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 1, S("12345"), S("a12345bcdefghij"));
    test(S("abcdefghij"), 1, S("1234567890"), S("a1234567890bcdefghij"));
    test(S("abcdefghij"), 1, S("12345678901234567890"), S("a12345678901234567890bcdefghij"));
    test(S("abcdefghij"), 5, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 5, S("12345"), S("abcde12345fghij"));
    test(S("abcdefghij"), 5, S("1234567890"), S("abcde1234567890fghij"));
    test(S("abcdefghij"), 5, S("12345678901234567890"), S("abcde12345678901234567890fghij"));
    test(S("abcdefghij"), 9, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 9, S("12345"), S("abcdefghi12345j"));
    test(S("abcdefghij"), 9, S("1234567890"), S("abcdefghi1234567890j"));
    test(S("abcdefghij"), 9, S("12345678901234567890"), S("abcdefghi12345678901234567890j"));
    test(S("abcdefghij"), 10, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 10, S("12345"), S("abcdefghij12345"));
    test(S("abcdefghij"), 10, S("1234567890"), S("abcdefghij1234567890"));
    test(S("abcdefghij"), 10, S("12345678901234567890"), S("abcdefghij12345678901234567890"));
    test(S("abcdefghij"), 11, S(""), S("can't happen"));
    test(S("abcdefghij"), 11, S("12345"), S("can't happen"));
    test(S("abcdefghij"), 11, S("1234567890"), S("can't happen"));
    test(S("abcdefghij"), 11, S("12345678901234567890"), S("can't happen"));
    test(S("abcdefghijklmnopqrst"), 0, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 0, S("12345"), S("12345abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 0, S("1234567890"), S("1234567890abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 0, S("12345678901234567890"), S("12345678901234567890abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 1, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 1, S("12345"), S("a12345bcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 1, S("1234567890"), S("a1234567890bcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 1, S("12345678901234567890"), S("a12345678901234567890bcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 10, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 10, S("12345"), S("abcdefghij12345klmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 10, S("1234567890"), S("abcdefghij1234567890klmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 10, S("12345678901234567890"), S("abcdefghij12345678901234567890klmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 19, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 19, S("12345"), S("abcdefghijklmnopqrs12345t"));
    test(S("abcdefghijklmnopqrst"), 19, S("1234567890"), S("abcdefghijklmnopqrs1234567890t"));
    test(S("abcdefghijklmnopqrst"), 19, S("12345678901234567890"), S("abcdefghijklmnopqrs12345678901234567890t"));
    test(S("abcdefghijklmnopqrst"), 20, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 20, S("12345"), S("abcdefghijklmnopqrst12345"));
    test(S("abcdefghijklmnopqrst"), 20, S("1234567890"), S("abcdefghijklmnopqrst1234567890"));
    test(S("abcdefghijklmnopqrst"), 20, S("12345678901234567890"), S("abcdefghijklmnopqrst12345678901234567890"));
    test(S("abcdefghijklmnopqrst"), 21, S(""), S("can't happen"));
    test(S("abcdefghijklmnopqrst"), 21, S("12345"), S("can't happen"));
    test(S("abcdefghijklmnopqrst"), 21, S("1234567890"), S("can't happen"));
    test(S("abcdefghijklmnopqrst"), 21, S("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(""), S(""));
    test(S(""), 0, S("12345"), S("12345"));
    test(S(""), 0, S("1234567890"), S("1234567890"));
    test(S(""), 0, S("12345678901234567890"), S("12345678901234567890"));
    test(S(""), 1, S(""), S("can't happen"));
    test(S(""), 1, S("12345"), S("can't happen"));
    test(S(""), 1, S("1234567890"), S("can't happen"));
    test(S(""), 1, S("12345678901234567890"), S("can't happen"));
    test(S("abcde"), 0, S(""), S("abcde"));
    test(S("abcde"), 0, S("12345"), S("12345abcde"));
    test(S("abcde"), 0, S("1234567890"), S("1234567890abcde"));
    test(S("abcde"), 0, S("12345678901234567890"), S("12345678901234567890abcde"));
    test(S("abcde"), 1, S(""), S("abcde"));
    test(S("abcde"), 1, S("12345"), S("a12345bcde"));
    test(S("abcde"), 1, S("1234567890"), S("a1234567890bcde"));
    test(S("abcde"), 1, S("12345678901234567890"), S("a12345678901234567890bcde"));
    test(S("abcde"), 2, S(""), S("abcde"));
    test(S("abcde"), 2, S("12345"), S("ab12345cde"));
    test(S("abcde"), 2, S("1234567890"), S("ab1234567890cde"));
    test(S("abcde"), 2, S("12345678901234567890"), S("ab12345678901234567890cde"));
    test(S("abcde"), 4, S(""), S("abcde"));
    test(S("abcde"), 4, S("12345"), S("abcd12345e"));
    test(S("abcde"), 4, S("1234567890"), S("abcd1234567890e"));
    test(S("abcde"), 4, S("12345678901234567890"), S("abcd12345678901234567890e"));
    test(S("abcde"), 5, S(""), S("abcde"));
    test(S("abcde"), 5, S("12345"), S("abcde12345"));
    test(S("abcde"), 5, S("1234567890"), S("abcde1234567890"));
    test(S("abcde"), 5, S("12345678901234567890"), S("abcde12345678901234567890"));
    test(S("abcde"), 6, S(""), S("can't happen"));
    test(S("abcde"), 6, S("12345"), S("can't happen"));
    test(S("abcde"), 6, S("1234567890"), S("can't happen"));
    test(S("abcde"), 6, S("12345678901234567890"), S("can't happen"));
    test(S("abcdefghij"), 0, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 0, S("12345"), S("12345abcdefghij"));
    test(S("abcdefghij"), 0, S("1234567890"), S("1234567890abcdefghij"));
    test(S("abcdefghij"), 0, S("12345678901234567890"), S("12345678901234567890abcdefghij"));
    test(S("abcdefghij"), 1, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 1, S("12345"), S("a12345bcdefghij"));
    test(S("abcdefghij"), 1, S("1234567890"), S("a1234567890bcdefghij"));
    test(S("abcdefghij"), 1, S("12345678901234567890"), S("a12345678901234567890bcdefghij"));
    test(S("abcdefghij"), 5, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 5, S("12345"), S("abcde12345fghij"));
    test(S("abcdefghij"), 5, S("1234567890"), S("abcde1234567890fghij"));
    test(S("abcdefghij"), 5, S("12345678901234567890"), S("abcde12345678901234567890fghij"));
    test(S("abcdefghij"), 9, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 9, S("12345"), S("abcdefghi12345j"));
    test(S("abcdefghij"), 9, S("1234567890"), S("abcdefghi1234567890j"));
    test(S("abcdefghij"), 9, S("12345678901234567890"), S("abcdefghi12345678901234567890j"));
    test(S("abcdefghij"), 10, S(""), S("abcdefghij"));
    test(S("abcdefghij"), 10, S("12345"), S("abcdefghij12345"));
    test(S("abcdefghij"), 10, S("1234567890"), S("abcdefghij1234567890"));
    test(S("abcdefghij"), 10, S("12345678901234567890"), S("abcdefghij12345678901234567890"));
    test(S("abcdefghij"), 11, S(""), S("can't happen"));
    test(S("abcdefghij"), 11, S("12345"), S("can't happen"));
    test(S("abcdefghij"), 11, S("1234567890"), S("can't happen"));
    test(S("abcdefghij"), 11, S("12345678901234567890"), S("can't happen"));
    test(S("abcdefghijklmnopqrst"), 0, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 0, S("12345"), S("12345abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 0, S("1234567890"), S("1234567890abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 0, S("12345678901234567890"), S("12345678901234567890abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 1, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 1, S("12345"), S("a12345bcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 1, S("1234567890"), S("a1234567890bcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 1, S("12345678901234567890"), S("a12345678901234567890bcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 10, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 10, S("12345"), S("abcdefghij12345klmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 10, S("1234567890"), S("abcdefghij1234567890klmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 10, S("12345678901234567890"), S("abcdefghij12345678901234567890klmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 19, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 19, S("12345"), S("abcdefghijklmnopqrs12345t"));
    test(S("abcdefghijklmnopqrst"), 19, S("1234567890"), S("abcdefghijklmnopqrs1234567890t"));
    test(S("abcdefghijklmnopqrst"), 19, S("12345678901234567890"), S("abcdefghijklmnopqrs12345678901234567890t"));
    test(S("abcdefghijklmnopqrst"), 20, S(""), S("abcdefghijklmnopqrst"));
    test(S("abcdefghijklmnopqrst"), 20, S("12345"), S("abcdefghijklmnopqrst12345"));
    test(S("abcdefghijklmnopqrst"), 20, S("1234567890"), S("abcdefghijklmnopqrst1234567890"));
    test(S("abcdefghijklmnopqrst"), 20, S("12345678901234567890"), S("abcdefghijklmnopqrst12345678901234567890"));
    test(S("abcdefghijklmnopqrst"), 21, S(""), S("can't happen"));
    test(S("abcdefghijklmnopqrst"), 21, S("12345"), S("can't happen"));
    test(S("abcdefghijklmnopqrst"), 21, S("1234567890"), S("can't happen"));
    test(S("abcdefghijklmnopqrst"), 21, S("12345678901234567890"), S("can't happen"));
    }
#endif

#if TEST_STD_VER > 3
    {   // LWG 2946
    std::string s;
    s.insert(0, {"abc", 1});
    assert(s.size() == 1);
    assert(s == "a");
    }
#endif
}