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 "test_allocator.h" 27 #include "constexpr_char_traits.hpp" 28 29 // Overloads 30 // --------------- 31 // (1) basic_string_view() - NOT TESTED 32 // (2) basic_string_view(const basic_string_view&) 33 // (3) basic_string_view(const CharT*, size_type) 34 // (4) basic_string_view(const CharT*) 35 int main() 36 { 37 using TestSizeT = test_allocator<char>::size_type; 38 { // Testing (1) 39 // Nothing TODO. Cannot deduce without any arguments. 40 } 41 { // Testing (2) 42 const std::string_view sin("abc"); 43 std::basic_string_view s(sin); 44 ASSERT_SAME_TYPE(decltype(s), std::string_view); 45 assert(s == "abc"); 46 47 using WSV = std::basic_string_view<wchar_t, constexpr_char_traits<wchar_t>>; 48 const WSV win(L"abcdef"); 49 std::basic_string_view w(win); 50 ASSERT_SAME_TYPE(decltype(w), WSV); 51 assert(w == L"abcdef"); 52 } 53 { // Testing (3) 54 std::basic_string_view s("abc", 2); 55 ASSERT_SAME_TYPE(decltype(s), std::string_view); 56 assert(s == "ab"); 57 58 std::basic_string_view w(L"abcdef", 4); 59 ASSERT_SAME_TYPE(decltype(w), std::wstring_view); 60 assert(w == L"abcd"); 61 } 62 { // Testing (4) 63 std::basic_string_view s("abc"); 64 ASSERT_SAME_TYPE(decltype(s), std::string_view); 65 assert(s == "abc"); 66 67 std::basic_string_view w(L"abcdef"); 68 ASSERT_SAME_TYPE(decltype(w), std::wstring_view); 69 assert(w == L"abcdef"); 70 } 71 } 72