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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 
     11 // <string_view>
     12 
     13 // template<class Allocator>
     14 // basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept
     15 
     16 
     17 #include <experimental/string_view>
     18 #include <string>
     19 #include <cassert>
     20 
     21 struct dummy_char_traits : public std::char_traits<char> {};
     22 
     23 template<typename CharT, typename Traits>
     24 void test ( const std::basic_string<CharT, Traits> &str ) {
     25     std::experimental::basic_string_view<CharT, Traits> sv1 ( str );
     26     assert ( sv1.size() == str.size());
     27     assert ( sv1.data() == str.data());
     28 }
     29 
     30 int main () {
     31 
     32     test ( std::string("QBCDE") );
     33     test ( std::string("") );
     34     test ( std::string() );
     35 
     36     test ( std::wstring(L"QBCDE") );
     37     test ( std::wstring(L"") );
     38     test ( std::wstring() );
     39 
     40 #if __cplusplus >= 201103L
     41     test ( std::u16string{u"QBCDE"} );
     42     test ( std::u16string{u""} );
     43     test ( std::u16string{} );
     44 
     45     test ( std::u32string{U"QBCDE"} );
     46     test ( std::u32string{U""} );
     47     test ( std::u32string{} );
     48 #endif
     49 
     50     test ( std::basic_string<char, dummy_char_traits>("QBCDE") );
     51     test ( std::basic_string<char, dummy_char_traits>("") );
     52     test ( std::basic_string<char, dummy_char_traits>() );
     53 
     54 }
     55