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 // UNSUPPORTED: c++98, c++03, c++11, c++14 11 // UNSUPPORTED: libcpp-no-deduction-guides 12 13 // FIXME(EricWF): As of 16/Feb/2017 Clang hits an assertion when compiling this 14 // test with '-g' (as the sanitizers do). 15 // XFAIL: ubsan, asan, msan, tsan 16 17 // <string_view> 18 19 // Test that the constructors offered by std::basic_string_view are formulated 20 // so they're compatible with implicit deduction guides. 21 22 #include <string_view> 23 #include <cassert> 24 25 #include "test_macros.h" 26 #include "constexpr_char_traits.hpp" 27 28 // Overloads 29 // --------------- 30 // (1) basic_string_view() - NOT TESTED 31 // (2) basic_string_view(const basic_string_view&) 32 // (3) basic_string_view(const CharT*, size_type) 33 // (4) basic_string_view(const CharT*) 34 int main() 35 { 36 { // Testing (1) 37 // Nothing TODO. Cannot deduce without any arguments. 38 } 39 { // Testing (2) 40 const std::string_view sin("abc"); 41 std::basic_string_view s(sin); 42 ASSERT_SAME_TYPE(decltype(s), std::string_view); 43 assert(s == "abc"); 44 45 using WSV = std::basic_string_view<wchar_t, constexpr_char_traits<wchar_t>>; 46 const WSV win(L"abcdef"); 47 std::basic_string_view w(win); 48 ASSERT_SAME_TYPE(decltype(w), WSV); 49 assert(w == L"abcdef"); 50 } 51 { // Testing (3) 52 std::basic_string_view s("abc", 2); 53 ASSERT_SAME_TYPE(decltype(s), std::string_view); 54 assert(s == "ab"); 55 56 std::basic_string_view w(L"abcdef", 4); 57 ASSERT_SAME_TYPE(decltype(w), std::wstring_view); 58 assert(w == L"abcd"); 59 } 60 { // Testing (4) 61 std::basic_string_view s("abc"); 62 ASSERT_SAME_TYPE(decltype(s), std::string_view); 63 assert(s == "abc"); 64 65 std::basic_string_view w(L"abcdef"); 66 ASSERT_SAME_TYPE(decltype(w), std::wstring_view); 67 assert(w == L"abcdef"); 68 } 69 } 70