forked from OSchip/llvm-project
51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <string_view>
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// constexpr const _CharT& back();
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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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template <typename CharT>
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bool test ( const CharT *s, size_t len ) {
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std::basic_string_view<CharT> sv ( s, len );
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assert ( sv.length() == len );
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assert ( sv.front() == s[0] );
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return &sv.front() == s;
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}
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int main () {
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assert ( test ( "ABCDE", 5 ));
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assert ( test ( "a", 1 ));
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assert ( test ( L"ABCDE", 5 ));
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assert ( test ( L"a", 1 ));
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#if TEST_STD_VER >= 11
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assert ( test ( u"ABCDE", 5 ));
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assert ( test ( u"a", 1 ));
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assert ( test ( U"ABCDE", 5 ));
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assert ( test ( U"a", 1 ));
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#endif
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#if TEST_STD_VER >= 11
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{
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constexpr std::basic_string_view<char> sv ( "ABC", 2 );
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static_assert ( sv.length() == 2, "" );
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static_assert ( sv.front() == 'A', "" );
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}
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#endif
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}
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