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deductiongu...function_ref(3) C++ Standard Libarydeductiongu...function_ref(3) NAME deductionguidesforstd::function_ref - deductionguidesforstd::func- tion_ref Synopsis Defined in header <functional> template< class F > (1) (since C++26) function_ref( F* ) -> function_ref<F>; template< auto f > (2) (since C++26) function_ref( std::nontype_t<f> ) -> function_ref</*see below*/>; template< auto f, class T > function_ref( std::nontype_t<f>, T&& ) -> function_ref</*see (3) (since C++26) below*/>; 1) This overload participates in overload resolution only if std::is_function_v<F> is true. 2) Let type F be std::remove_pointer_t<decltype(f)>. This overload participates in overload resolution only if std::is_function_v<F> is true. The de- duced type is std::function_ref<F>. 3) Let type F be decltype(f). This overload participates in overload resolution only if : * F is of the form R(G::*)(A...) noexcept(E) (optionally cv-quali- fied, optionally noexcept, optionally lvalue reference qualified) for a type G, or * F is of the form M G::* for a type G and an object type M, in which case let R be std::invoke_result_t<F, T&>, A... be an empty pack, and E be false, or * F is of the form R(*)(G, A...) noexcept(E) for a type G. The deduced type is std::function_ref<R(A...) noexcept(E)>. Example This section is incomplete Reason: no example Category: * Todo no example http://cppreference.com 2024.06.10 deductiongu...function_ref(3)
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