deduct.fail.cpp (1324B)
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 // <vector> 11 // UNSUPPORTED: c++98, c++03, c++11, c++14 12 // UNSUPPORTED: libcpp-no-deduction-guides 13 14 15 // template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> 16 // vector(InputIterator, InputIterator, Allocator = Allocator()) 17 // -> vector<typename iterator_traits<InputIterator>::value_type, Allocator>; 18 // 19 20 21 #include <deque> 22 #include <iterator> 23 #include <cassert> 24 #include <cstddef> 25 26 27 int main() 28 { 29 // Test the explicit deduction guides 30 31 // Test the implicit deduction guides 32 { 33 // vector (allocator &) 34 std::vector vec((std::allocator<int>())); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'vector'}} 35 // Note: The extra parens are necessary, since otherwise clang decides it is a function declaration. 36 // Also, we can't use {} instead of parens, because that constructs a 37 // deque<allocator<int>, allocator<allocator<int>>> 38 } 39 40 }