67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// UNSUPPORTED: libcpp-no-deduction-guides
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// <string_view>
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// Test that the constructors offered by std::basic_string_view are formulated
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// so they're compatible with implicit deduction guides.
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#include <string_view>
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#include <cassert>
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#include "test_macros.h"
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#include "constexpr_char_traits.h"
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// Overloads
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// ---------------
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// (1) basic_string_view() - NOT TESTED
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// (2) basic_string_view(const basic_string_view&)
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// (3) basic_string_view(const CharT*, size_type)
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// (4) basic_string_view(const CharT*)
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int main(int, char**)
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{
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{ // Testing (1)
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// Nothing TODO. Cannot deduce without any arguments.
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}
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{ // Testing (2)
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const std::string_view sin("abc");
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std::basic_string_view s(sin);
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ASSERT_SAME_TYPE(decltype(s), std::string_view);
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assert(s == "abc");
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using WSV = std::basic_string_view<wchar_t, constexpr_char_traits<wchar_t>>;
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const WSV win(L"abcdef");
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std::basic_string_view w(win);
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ASSERT_SAME_TYPE(decltype(w), WSV);
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assert(w == L"abcdef");
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}
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{ // Testing (3)
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std::basic_string_view s("abc", 2);
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ASSERT_SAME_TYPE(decltype(s), std::string_view);
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assert(s == "ab");
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std::basic_string_view w(L"abcdef", 4);
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ASSERT_SAME_TYPE(decltype(w), std::wstring_view);
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assert(w == L"abcd");
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}
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{ // Testing (4)
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std::basic_string_view s("abc");
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ASSERT_SAME_TYPE(decltype(s), std::string_view);
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assert(s == "abc");
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std::basic_string_view w(L"abcdef");
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ASSERT_SAME_TYPE(decltype(w), std::wstring_view);
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assert(w == L"abcdef");
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}
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return 0;
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}
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