//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// <string>

// constexpr size_type find_first_of(charT c, size_type pos = 0) const;

#include <string_view>
#include <cassert>

#include "test_macros.h"
#include "constexpr_char_traits.hpp"

template <class S>
void
test(const S& s, typename S::value_type c, typename S::size_type pos,
     typename S::size_type x)
{
    assert(s.find_first_of(c, pos) == x);
    if (x != S::npos)
        assert(pos <= x && x < s.size());
}

template <class S>
void
test(const S& s, typename S::value_type c, typename S::size_type x)
{
    assert(s.find_first_of(c) == x);
    if (x != S::npos)
        assert(x < s.size());
}

int main(int, char**)
{
    {
    typedef std::string_view S;
    test(S(""), 'e', 0, S::npos);
    test(S(""), 'e', 1, S::npos);
    test(S("kitcj"), 'e', 0, S::npos);
    test(S("qkamf"), 'e', 1, S::npos);
    test(S("nhmko"), 'e', 2, S::npos);
    test(S("tpsaf"), 'e', 4, S::npos);
    test(S("lahfb"), 'e', 5, S::npos);
    test(S("irkhs"), 'e', 6, S::npos);
    test(S("gmfhdaipsr"), 'e', 0, S::npos);
    test(S("kantesmpgj"), 'e', 1, 4);
    test(S("odaftiegpm"), 'e', 5, 6);
    test(S("oknlrstdpi"), 'e', 9, S::npos);
    test(S("eolhfgpjqk"), 'e', 10, S::npos);
    test(S("pcdrofikas"), 'e', 11, S::npos);
    test(S("nbatdlmekrgcfqsophij"), 'e', 0, 7);
    test(S("bnrpehidofmqtcksjgla"), 'e', 1, 4);
    test(S("jdmciepkaqgotsrfnhlb"), 'e', 10, S::npos);
    test(S("jtdaefblsokrmhpgcnqi"), 'e', 19, S::npos);
    test(S("hkbgspofltajcnedqmri"), 'e', 20, S::npos);
    test(S("oselktgbcapndfjihrmq"), 'e', 21, S::npos);

    test(S(""), 'e', S::npos);
    test(S("csope"), 'e', 4);
    test(S("gfsmthlkon"), 'e', S::npos);
    test(S("laenfsbridchgotmkqpj"), 'e', 2);
    }

#if TEST_STD_VER > 11
    {
    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
    constexpr SV  sv1;
    constexpr SV  sv2 { "abcde", 5 };

    static_assert (sv1.find_first_of( 'e', 0 ) == SV::npos, "" );
    static_assert (sv1.find_first_of( 'e', 1 ) == SV::npos, "" );
    static_assert (sv2.find_first_of( 'q', 0 ) == SV::npos, "" );
    static_assert (sv2.find_first_of( 'e', 1 ) == 4, "" );
    static_assert (sv2.find_first_of( 'e', 5 ) == SV::npos, "" );
    }
#endif

  return 0;
}