tmp/tmpnzoht5rt/{from.md → to.md}
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| 1 |
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##### Deduction guides <a id="func.wrap.ref.deduct">[[func.wrap.ref.deduct]]</a>
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``` cpp
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template<class F>
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function_ref(F*) -> function_ref<F>;
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```
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*Constraints:* `is_function_v<F>` is `true`.
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``` cpp
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template<auto f>
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function_ref(nontype_t<f>) -> function_ref<see below>;
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```
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Let `F` be `remove_pointer_t<decltype(f)>`.
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*Constraints:* `is_function_v<F>` is `true`.
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*Remarks:* The deduced type is `function_ref<F>`.
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``` cpp
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template<auto f, class T>
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function_ref(nontype_t<f>, T&&) -> function_ref<see below>;
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```
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Let `F` be `decltype(f)`.
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*Constraints:*
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- `F` is of the form `R(G::*)(A...) cv `\\ₒₚₜ ` noexcept(E)` for a type
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`G`, or
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- `F` is of the form `M G::*` for a type `G` and an object type `M`, in
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which case let `R` be `invoke_result_t<F, T&>`, `A...` be an empty
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pack, and `E` be `false`, or
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- `F` is of the form `R(*)(G, A...) noexcept(E)` for a type `G`.
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*Remarks:* The deduced type is `function_ref<R(A...) noexcept(E)>`.
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