//===----------------------------------------------------------------------===//
//
// 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>
// void swap(basic_string_view& _other) noexcept
#include <experimental/string_view>
#include <cassert>
template<typename CharT>
void test ( const CharT *s, size_t len ) {
typedef std::experimental::basic_string_view<CharT> SV;
{
SV sv1(s);
SV sv2;
assert ( sv1.size() == len );
assert ( sv1.data() == s );
assert ( sv2.size() == 0 );
sv1.swap ( sv2 );
assert ( sv1.size() == 0 );
assert ( sv2.size() == len );
assert ( sv2.data() == s );
}
}
#if _LIBCPP_STD_VER > 11
constexpr size_t test_ce ( size_t n, size_t k ) {
typedef std::experimental::basic_string_view<char> SV;
SV sv1{ "ABCDEFGHIJKL", n };
SV sv2 { sv1.data(), k };
sv1.swap ( sv2 );
return sv1.size();
}
#endif
int main () {
test ( "ABCDE", 5 );
test ( "a", 1 );
test ( "", 0 );
test ( L"ABCDE", 5 );
test ( L"a", 1 );
test ( L"", 0 );
#if __cplusplus >= 201103L
test ( u"ABCDE", 5 );
test ( u"a", 1 );
test ( u"", 0 );
test ( U"ABCDE", 5 );
test ( U"a", 1 );
test ( U"", 0 );
#endif
#if _LIBCPP_STD_VER > 11
{
static_assert ( test_ce (2, 3) == 3, "" );
static_assert ( test_ce (5, 3) == 3, "" );
static_assert ( test_ce (0, 1) == 1, "" );
}
#endif
}