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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_iterator end() const;
#include <experimental/string_view>
#include <cassert>
template <class S>
void
test(S s)
{
const S& cs = s;
typename S::iterator e = s.end();
typename S::const_iterator ce1 = cs.end();
typename S::const_iterator ce2 = s.cend();
if (s.empty())
{
assert( e == s.begin());
assert(ce1 == cs.begin());
assert(ce2 == s.begin());
}
else
{
assert( e != s.begin());
assert(ce1 != cs.begin());
assert(ce2 != s.begin());
}
assert( e - s.begin() == s.size());
assert(ce1 - cs.begin() == cs.size());
assert(ce2 - s.cbegin() == s.size());
assert( e == ce1);
assert( e == ce2);
assert(ce1 == ce2);
}
int main()
{
typedef std::experimental::string_view string_view;
typedef std::experimental::u16string_view u16string_view;
typedef std::experimental::u32string_view u32string_view;
typedef std::experimental::wstring_view wstring_view;
test(string_view ());
test(u16string_view());
test(u32string_view());
test(wstring_view ());
test(string_view ( "123"));
test(wstring_view (L"123"));
#if __cplusplus >= 201103L
test(u16string_view{u"123"});
test(u32string_view{U"123"});
#endif
#if _LIBCPP_STD_VER > 11
{
constexpr string_view sv { "123", 3 };
constexpr u16string_view u16sv {u"123", 3 };
constexpr u32string_view u32sv {U"123", 3 };
constexpr wstring_view wsv {L"123", 3 };
static_assert ( sv.begin() != sv.end(), "" );
static_assert ( u16sv.begin() != u16sv.end(), "" );
static_assert ( u32sv.begin() != u32sv.end(), "" );
static_assert ( wsv.begin() != wsv.end(), "" );
static_assert ( sv.begin() != sv.cend(), "" );
static_assert ( u16sv.begin() != u16sv.cend(), "" );
static_assert ( u32sv.begin() != u32sv.cend(), "" );
static_assert ( wsv.begin() != wsv.cend(), "" );
}
#endif
}
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