find_pointer_size.pass.cpp | Explore in Territory

//===----------------------------------------------------------------------===//
//
// 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(const charT* s, 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, const typename S::value_type* str, typename S::size_type pos, typename S::size_type x) {
  LIBCPP_ASSERT_NOEXCEPT(s.find(str, pos));
  assert(s.find(str, pos) == x);
  if (x != S::npos) {
    typename S::size_type n = S::traits_type::length(str);
    assert(pos <= x && x + n <= s.size());
  }
}

template <class S>
void test(const S& s, const typename S::value_type* str, typename S::size_type x) {
  LIBCPP_ASSERT_NOEXCEPT(s.find(str));
  assert(s.find(str) == x);
  if (x != S::npos) {
    typename S::size_type n = S::traits_type::length(str);
    assert(0 <= x && x + n <= s.size());
  }
}

template <class S>
void test0() {
  test(S(""), "", 0, 0);
  test(S(""), "abcde", 0, S::npos);
  test(S(""), "abcdeabcde", 0, S::npos);
  test(S(""), "abcdeabcdeabcdeabcde", 0, S::npos);
  test(S(""), "", 1, S::npos);
  test(S(""), "abcde", 1, S::npos);
  test(S(""), "abcdeabcde", 1, S::npos);
  test(S(""), "abcdeabcdeabcdeabcde", 1, S::npos);
  test(S("abcde"), "", 0, 0);
  test(S("abcde"), "abcde", 0, 0);
  test(S("abcde"), "abcdeabcde", 0, S::npos);
  test(S("abcde"), "abcdeabcdeabcdeabcde", 0, S::npos);
  test(S("abcde"), "", 1, 1);
  test(S("abcde"), "abcde", 1, S::npos);
  test(S("abcde"), "abcdeabcde", 1, S::npos);
  test(S("abcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
  test(S("abcde"), "", 2, 2);
  test(S("abcde"), "abcde", 2, S::npos);
  test(S("abcde"), "abcdeabcde", 2, S::npos);
  test(S("abcde"), "abcdeabcdeabcdeabcde", 2, S::npos);
  test(S("abcde"), "", 4, 4);
  test(S("abcde"), "abcde", 4, S::npos);
  test(S("abcde"), "abcdeabcde", 4, S::npos);
  test(S("abcde"), "abcdeabcdeabcdeabcde", 4, S::npos);
  test(S("abcde"), "", 5, 5);
  test(S("abcde"), "abcde", 5, S::npos);
  test(S("abcde"), "abcdeabcde", 5, S::npos);
  test(S("abcde"), "abcdeabcdeabcdeabcde", 5, S::npos);
  test(S("abcde"), "", 6, S::npos);
  test(S("abcde"), "abcde", 6, S::npos);
  test(S("abcde"), "abcdeabcde", 6, S::npos);
  test(S("abcde"), "abcdeabcdeabcdeabcde", 6, S::npos);
  test(S("abcdeabcde"), "", 0, 0);
  test(S("abcdeabcde"), "abcde", 0, 0);
  test(S("abcdeabcde"), "abcdeabcde", 0, 0);
  test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, S::npos);
  test(S("abcdeabcde"), "", 1, 1);
  test(S("abcdeabcde"), "abcde", 1, 5);
  test(S("abcdeabcde"), "abcdeabcde", 1, S::npos);
  test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
  test(S("abcdeabcde"), "", 5, 5);
  test(S("abcdeabcde"), "abcde", 5, 5);
  test(S("abcdeabcde"), "abcdeabcde", 5, S::npos);
  test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, S::npos);
  test(S("abcdeabcde"), "", 9, 9);
  test(S("abcdeabcde"), "abcde", 9, S::npos);
  test(S("abcdeabcde"), "abcdeabcde", 9, S::npos);
  test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, S::npos);
  test(S("abcdeabcde"), "", 10, 10);
  test(S("abcdeabcde"), "abcde", 10, S::npos);
  test(S("abcdeabcde"), "abcdeabcde", 10, S::npos);
  test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, S::npos);
  test(S("abcdeabcde"), "", 11, S::npos);
  test(S("abcdeabcde"), "abcde", 11, S::npos);
  test(S("abcdeabcde"), "abcdeabcde", 11, S::npos);
  test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "", 0, 0);
  test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 0);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 0);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0);
  test(S("abcdeabcdeabcdeabcde"), "", 1, 1);
  test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 5);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 5);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "", 10, 10);
  test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 10);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 10);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "", 19, 19);
  test(S("abcdeabcdeabcdeabcde"), "abcde", 19, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "", 20, 20);
  test(S("abcdeabcdeabcdeabcde"), "abcde", 20, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "", 21, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "abcde", 21, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, S::npos);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, S::npos);
}

template <class S>
void test1() {
  test(S(""), "", 0);
  test(S(""), "abcde", S::npos);
  test(S(""), "abcdeabcde", S::npos);
  test(S(""), "abcdeabcdeabcdeabcde", S::npos);
  test(S("abcde"), "", 0);
  test(S("abcde"), "abcde", 0);
  test(S("abcde"), "abcdeabcde", S::npos);
  test(S("abcde"), "abcdeabcdeabcdeabcde", S::npos);
  test(S("abcdeabcde"), "", 0);
  test(S("abcdeabcde"), "abcde", 0);
  test(S("abcdeabcde"), "abcdeabcde", 0);
  test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", S::npos);
  test(S("abcdeabcdeabcdeabcde"), "", 0);
  test(S("abcdeabcdeabcdeabcde"), "abcde", 0);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0);
  test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0);
}

int main(int, char**) {
  {
    typedef std::string_view S;
    test0<S>();
    test1<S>();
  }

#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("") == 0, "");
    static_assert(sv1.find("abcde") == SV::npos, "");
    static_assert(sv2.find("") == 0, "");
    static_assert(sv2.find("abcde") == 0, "");
    static_assert(sv2.find("abcde", 1) == SV::npos, "");
  }
#endif

  return 0;
}
llvm/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size.pass.cpp
