test/std/strings/string.view/string.view.find/find_first_of_char_size.pass.cpp

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

// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)

// <string_view>

// 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.h"

template <class S>
void test(const S& s, typename S::value_type c, typename S::size_type pos, typename S::size_type x) {
  LIBCPP_ASSERT_NOEXCEPT(s.find_first_of(c, pos));
  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;
}