iter_alloc_deduction.pass.cpp (3926B)
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 // <string> 11 // UNSUPPORTED: c++98, c++03, c++11, c++14 12 // XFAIL: libcpp-no-deduction-guides 13 14 // template<class InputIterator> 15 // basic_string(InputIterator begin, InputIterator end, 16 // const Allocator& a = Allocator()); 17 18 // template<class InputIterator, 19 // class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> 20 // basic_string(InputIterator, InputIterator, Allocator = Allocator()) 21 // -> basic_string<typename iterator_traits<InputIterator>::value_type, 22 // char_traits<typename iterator_traits<InputIterator>::value_type>, 23 // Allocator>; 24 // 25 // The deduction guide shall not participate in overload resolution if InputIterator 26 // is a type that does not qualify as an input iterator, or if Allocator is a type 27 // that does not qualify as an allocator. 28 29 30 #include <string> 31 #include <iterator> 32 #include <cassert> 33 #include <cstddef> 34 35 #include "test_macros.h" 36 #include "test_allocator.h" 37 #include "../input_iterator.h" 38 #include "min_allocator.h" 39 40 int main() 41 { 42 { 43 const char* s = "12345678901234"; 44 std::basic_string s1(s, s+10); // Can't use {} here 45 using S = decltype(s1); // what type did we get? 46 static_assert(std::is_same_v<S::value_type, char>, ""); 47 static_assert(std::is_same_v<S::traits_type, std::char_traits<char>>, ""); 48 static_assert(std::is_same_v<S::allocator_type, std::allocator<char>>, ""); 49 assert(s1.size() == 10); 50 assert(s1.compare(0, s1.size(), s, s1.size()) == 0); 51 } 52 53 { 54 const char* s = "12345678901234"; 55 std::basic_string s1{s, s+10, std::allocator<char>{}}; 56 using S = decltype(s1); // what type did we get? 57 static_assert(std::is_same_v<S::value_type, char>, ""); 58 static_assert(std::is_same_v<S::traits_type, std::char_traits<char>>, ""); 59 static_assert(std::is_same_v<S::allocator_type, std::allocator<char>>, ""); 60 assert(s1.size() == 10); 61 assert(s1.compare(0, s1.size(), s, s1.size()) == 0); 62 } 63 { 64 const wchar_t* s = L"12345678901234"; 65 std::basic_string s1{s, s+10, test_allocator<wchar_t>{}}; 66 using S = decltype(s1); // what type did we get? 67 static_assert(std::is_same_v<S::value_type, wchar_t>, ""); 68 static_assert(std::is_same_v<S::traits_type, std::char_traits<wchar_t>>, ""); 69 static_assert(std::is_same_v<S::allocator_type, test_allocator<wchar_t>>, ""); 70 assert(s1.size() == 10); 71 assert(s1.compare(0, s1.size(), s, s1.size()) == 0); 72 } 73 { 74 const char16_t* s = u"12345678901234"; 75 std::basic_string s1{s, s+10, min_allocator<char16_t>{}}; 76 using S = decltype(s1); // what type did we get? 77 static_assert(std::is_same_v<S::value_type, char16_t>, ""); 78 static_assert(std::is_same_v<S::traits_type, std::char_traits<char16_t>>, ""); 79 static_assert(std::is_same_v<S::allocator_type, min_allocator<char16_t>>, ""); 80 assert(s1.size() == 10); 81 assert(s1.compare(0, s1.size(), s, s1.size()) == 0); 82 } 83 { 84 const char32_t* s = U"12345678901234"; 85 std::basic_string s1{s, s+10, explicit_allocator<char32_t>{}}; 86 using S = decltype(s1); // what type did we get? 87 static_assert(std::is_same_v<S::value_type, char32_t>, ""); 88 static_assert(std::is_same_v<S::traits_type, std::char_traits<char32_t>>, ""); 89 static_assert(std::is_same_v<S::allocator_type, explicit_allocator<char32_t>>, ""); 90 assert(s1.size() == 10); 91 assert(s1.compare(0, s1.size(), s, s1.size()) == 0); 92 } 93 }