| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <functional> |
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| 10 | |
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| 11 | // template<class F> |
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| 12 | // function(F) -> function<see-below>; |
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| 13 | |
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| 14 | // UNSUPPORTED: c++03, c++11, c++14 |
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| 15 | |
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| 16 | // The deduction guides for std::function do not handle rvalue-ref qualified |
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| 17 | // call operators and C-style variadics. It also doesn't deduce from nullptr_t. |
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| 18 | // Make sure we stick to the specification. |
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| 19 | |
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| 20 | #include <functional> |
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| 21 | |
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| 22 | struct R { }; |
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| 23 | struct f0 { R operator()() && { return {}; } }; |
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| 24 | struct f1 { R operator()(int, ...) { return {}; } }; |
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| 25 | |
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| 26 | void f() { |
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| 27 | std::function f = f0{}; // expected-error{{no viable constructor or deduction guide for deduction of template arguments of 'function'}} |
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| 28 | std::function g = f1{}; // expected-error{{no viable constructor or deduction guide for deduction of template arguments of 'function'}} |
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| 29 | std::function h = nullptr; // expected-error{{no viable constructor or deduction guide for deduction of template arguments of 'function'}} |
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| 30 | } |
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| 31 | |
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