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 // void clear() noexcept 14 15 #include <experimental/string_view> 16 #include <cassert> 17 18 template<typename CharT> 19 void test ( const CharT *s, size_t len ) { 20 typedef std::experimental::basic_string_view<CharT> SV; 21 { 22 SV sv1 ( s ); 23 assert ( sv1.size() == len ); 24 assert ( sv1.data() == s ); 25 26 sv1.clear (); 27 assert ( sv1.data() == nullptr ); 28 assert ( sv1.size() == 0 ); 29 assert ( sv1 == SV()); 30 } 31 } 32 33 #if _LIBCPP_STD_VER > 11 34 constexpr size_t test_ce ( size_t n ) { 35 typedef std::experimental::basic_string_view<char> SV; 36 SV sv1{ "ABCDEFGHIJKL", n }; 37 sv1.clear(); 38 return sv1.size(); 39 } 40 #endif 41 42 int main () { 43 test ( "ABCDE", 5 ); 44 test ( "a", 1 ); 45 test ( "", 0 ); 46 47 test ( L"ABCDE", 5 ); 48 test ( L"a", 1 ); 49 test ( L"", 0 ); 50 51 #if __cplusplus >= 201103L 52 test ( u"ABCDE", 5 ); 53 test ( u"a", 1 ); 54 test ( u"", 0 ); 55 56 test ( U"ABCDE", 5 ); 57 test ( U"a", 1 ); 58 test ( U"", 0 ); 59 #endif 60 61 #if _LIBCPP_STD_VER > 11 62 static_assert ( test_ce (5) == 0, "" ); 63 #endif 64 65 } 66
