Concept CallableNauto concept CallableN<typename F, typename T1, typename T2, ..., typename TN> {
typename result_type;
result_type operator()(F&, T1, T2, ..., TN);
};Where Defined#include <concepts> DescriptionThe Callable family of concepts--Callable0,
Callable1, ..., CallableM requires that the given
parameter F be callable given arguments of types T1,
T2, ..., TN.
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