| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <functional> |
| |
| // template<class F> |
| // function(F) -> function<see-below>; |
| |
| // UNSUPPORTED: c++98, c++03, c++11, c++14 |
| // UNSUPPORTED: libcpp-no-deduction-guides |
| |
| // The deduction guides for std::function do not handle rvalue-ref qualified |
| // call operators and C-style variadics. It also doesn't deduce from nullptr_t. |
| // Make sure we stick to the specification. |
| |
| #include <functional> |
| #include <type_traits> |
| |
| |
| struct R { }; |
| struct f0 { R operator()() && { return {}; } }; |
| struct f1 { R operator()(int, ...) { return {}; } }; |
| |
| int main() { |
| std::function f = f0{}; // expected-error{{no viable constructor or deduction guide for deduction of template arguments of 'function'}} |
| std::function g = f1{}; // expected-error{{no viable constructor or deduction guide for deduction of template arguments of 'function'}} |
| std::function h = nullptr; // expected-error{{no viable constructor or deduction guide for deduction of template arguments of 'function'}} |
| } |