from_ptr_len.pass.cpp (2081B)
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 typedef std::basic_string_view<CharT> SV; 27 LIBCPP_ASSERT_NOEXCEPT(SV(s, sz)); 28 29 SV sv1 ( s, sz ); 30 assert ( sv1.size() == sz ); 31 assert ( sv1.data() == s ); 32 } 33 } 34 35 int main () { 36 37 test ( "QBCDE", 5 ); 38 test ( "QBCDE", 2 ); 39 test ( "", 0 ); 40 #if TEST_STD_VER > 11 41 { 42 constexpr const char *s = "QBCDE"; 43 constexpr std::basic_string_view<char> sv1 ( s, 2 ); 44 static_assert ( sv1.size() == 2, "" ); 45 static_assert ( sv1.data() == s, "" ); 46 } 47 #endif 48 49 test ( L"QBCDE", 5 ); 50 test ( L"QBCDE", 2 ); 51 test ( L"", 0 ); 52 #if TEST_STD_VER > 11 53 { 54 constexpr const wchar_t *s = L"QBCDE"; 55 constexpr std::basic_string_view<wchar_t> sv1 ( s, 2 ); 56 static_assert ( sv1.size() == 2, "" ); 57 static_assert ( sv1.data() == s, "" ); 58 } 59 #endif 60 61 #if TEST_STD_VER >= 11 62 test ( u"QBCDE", 5 ); 63 test ( u"QBCDE", 2 ); 64 test ( u"", 0 ); 65 #if TEST_STD_VER > 11 66 { 67 constexpr const char16_t *s = u"QBCDE"; 68 constexpr std::basic_string_view<char16_t> sv1 ( s, 2 ); 69 static_assert ( sv1.size() == 2, "" ); 70 static_assert ( sv1.data() == s, "" ); 71 } 72 #endif 73 74 test ( U"QBCDE", 5 ); 75 test ( U"QBCDE", 2 ); 76 test ( U"", 0 ); 77 #if TEST_STD_VER > 11 78 { 79 constexpr const char32_t *s = U"QBCDE"; 80 constexpr std::basic_string_view<char32_t> sv1 ( s, 2 ); 81 static_assert ( sv1.size() == 2, "" ); 82 static_assert ( sv1.data() == s, "" ); 83 } 84 #endif 85 #endif 86 }