a90c6dd460
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8
86 lines
2.3 KiB
C++
86 lines
2.3 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_iterator end() const;
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#include <experimental/string_view>
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#include <cassert>
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template <class S>
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void
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test(S s)
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{
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const S& cs = s;
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typename S::iterator e = s.end();
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typename S::const_iterator ce1 = cs.end();
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typename S::const_iterator ce2 = s.cend();
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if (s.empty())
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{
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assert( e == s.begin());
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assert(ce1 == cs.begin());
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assert(ce2 == s.begin());
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}
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else
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{
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assert( e != s.begin());
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assert(ce1 != cs.begin());
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assert(ce2 != s.begin());
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}
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assert( e - s.begin() == s.size());
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assert(ce1 - cs.begin() == cs.size());
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assert(ce2 - s.cbegin() == s.size());
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assert( e == ce1);
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assert( e == ce2);
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assert(ce1 == ce2);
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}
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int main()
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{
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typedef std::experimental::string_view string_view;
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typedef std::experimental::u16string_view u16string_view;
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typedef std::experimental::u32string_view u32string_view;
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typedef std::experimental::wstring_view wstring_view;
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test(string_view ());
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test(u16string_view());
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test(u32string_view());
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test(wstring_view ());
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test(string_view ( "123"));
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test(wstring_view (L"123"));
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#if __cplusplus >= 201103L
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test(u16string_view{u"123"});
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test(u32string_view{U"123"});
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#endif
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#if _LIBCPP_STD_VER > 11
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{
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constexpr string_view sv { "123", 3 };
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constexpr u16string_view u16sv {u"123", 3 };
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constexpr u32string_view u32sv {U"123", 3 };
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constexpr wstring_view wsv {L"123", 3 };
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static_assert ( sv.begin() != sv.end(), "" );
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static_assert ( u16sv.begin() != u16sv.end(), "" );
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static_assert ( u32sv.begin() != u32sv.end(), "" );
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static_assert ( wsv.begin() != wsv.end(), "" );
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static_assert ( sv.begin() != sv.cend(), "" );
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static_assert ( u16sv.begin() != u16sv.cend(), "" );
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static_assert ( u32sv.begin() != u32sv.cend(), "" );
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static_assert ( wsv.begin() != wsv.cend(), "" );
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}
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#endif
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}
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