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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <string_view>
// constexpr const _CharT& back();
#include <experimental/string_view>
#include <cassert>
template <typename CharT>
bool test ( const CharT *s, size_t len ) {
std::experimental::basic_string_view<CharT> sv ( s, len );
assert ( sv.length() == len );
assert ( sv.front() == s[0] );
return &sv.front() == s;
}
int main () {
assert ( test ( "ABCDE", 5 ));
assert ( test ( "a", 1 ));
assert ( test ( L"ABCDE", 5 ));
assert ( test ( L"a", 1 ));
#if __cplusplus >= 201103L
assert ( test ( u"ABCDE", 5 ));
assert ( test ( u"a", 1 ));
assert ( test ( U"ABCDE", 5 ));
assert ( test ( U"a", 1 ));
#endif
#if __cplusplus >= 201103L
{
constexpr std::experimental::basic_string_view<char> sv ( "ABC", 2 );
static_assert ( sv.length() == 2, "" );
static_assert ( sv.front() == 'A', "" );
}
#endif
}
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