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//===----------------------------------------------------------------------===//
//
// 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: c++03, c++11, c++14
// UNSUPPORTED: libcpp-no-deduction-guides
// <string_view>
// Test that the constructors offered by std::basic_string_view are formulated
// so they're compatible with implicit deduction guides.
#include <string_view>
#include <cassert>
#include "test_macros.h"
#include "constexpr_char_traits.h"
// Overloads
// ---------------
// (1) basic_string_view() - NOT TESTED
// (2) basic_string_view(const basic_string_view&)
// (3) basic_string_view(const CharT*, size_type)
// (4) basic_string_view(const CharT*)
int main(int, char**)
{
{ // Testing (1)
// Nothing to do. Cannot deduce without any arguments.
}
{ // Testing (2)
const std::string_view sin("abc");
std::basic_string_view s(sin);
ASSERT_SAME_TYPE(decltype(s), std::string_view);
assert(s == "abc");
using WSV = std::basic_string_view<wchar_t, constexpr_char_traits<wchar_t>>;
const WSV win(L"abcdef");
std::basic_string_view w(win);
ASSERT_SAME_TYPE(decltype(w), WSV);
assert(w == L"abcdef");
}
{ // Testing (3)
std::basic_string_view s("abc", 2);
ASSERT_SAME_TYPE(decltype(s), std::string_view);
assert(s == "ab");
std::basic_string_view w(L"abcdef", 4);
ASSERT_SAME_TYPE(decltype(w), std::wstring_view);
assert(w == L"abcd");
}
{ // Testing (4)
std::basic_string_view s("abc");
ASSERT_SAME_TYPE(decltype(s), std::string_view);
assert(s == "abc");
std::basic_string_view w(L"abcdef");
ASSERT_SAME_TYPE(decltype(w), std::wstring_view);
assert(w == L"abcdef");
}
return 0;
}
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