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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 //  constexpr basic_string_view(const _CharT* _s, size_type _len)
     14 //      : __data (_s), __size(_len) {}
     15 
     16 
     17 #include <string_view>
     18 #include <string>
     19 #include <cassert>
     20 
     21 #include "test_macros.h"
     22 
     23 template<typename CharT>
     24 void test ( const CharT *s, size_t sz ) {
     25     {
     26     std::basic_string_view<CharT> sv1 ( s, sz );
     27     assert ( sv1.size() == sz );
     28     assert ( sv1.data() == s );
     29     }
     30 }
     31 
     32 int main () {
     33 
     34     test ( "QBCDE", 5 );
     35     test ( "QBCDE", 2 );
     36     test ( "", 0 );
     37 #if TEST_STD_VER > 11
     38     {
     39     constexpr const char *s = "QBCDE";
     40     constexpr std::basic_string_view<char> sv1 ( s, 2 );
     41     static_assert ( sv1.size() == 2, "" );
     42     static_assert ( sv1.data() == s, "" );
     43     }
     44 #endif
     45 
     46     test ( L"QBCDE", 5 );
     47     test ( L"QBCDE", 2 );
     48     test ( L"", 0 );
     49 #if TEST_STD_VER > 11
     50     {
     51     constexpr const wchar_t *s = L"QBCDE";
     52     constexpr std::basic_string_view<wchar_t> sv1 ( s, 2 );
     53     static_assert ( sv1.size() == 2, "" );
     54     static_assert ( sv1.data() == s, "" );
     55     }
     56 #endif
     57 
     58 #if TEST_STD_VER >= 11
     59     test ( u"QBCDE", 5 );
     60     test ( u"QBCDE", 2 );
     61     test ( u"", 0 );
     62 #if TEST_STD_VER > 11
     63     {
     64     constexpr const char16_t *s = u"QBCDE";
     65     constexpr std::basic_string_view<char16_t> sv1 ( s, 2 );
     66     static_assert ( sv1.size() == 2, "" );
     67     static_assert ( sv1.data() == s, "" );
     68     }
     69 #endif
     70 
     71     test ( U"QBCDE", 5 );
     72     test ( U"QBCDE", 2 );
     73     test ( U"", 0 );
     74 #if TEST_STD_VER > 11
     75     {
     76     constexpr const char32_t *s = U"QBCDE";
     77     constexpr std::basic_string_view<char32_t> sv1 ( s, 2 );
     78     static_assert ( sv1.size() == 2, "" );
     79     static_assert ( sv1.data() == s, "" );
     80     }
     81 #endif
     82 #endif
     83 }
     84