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Showing content from https://timsong-cpp.github.io/cppwp/n4659/func.wrap.func.inv below:

[func.wrap.func.inv]

23 General utilities library [utilities] 23.14 Function objects [function.objects] 23.14.13 Polymorphic function wrappers [func.wrap] 23.14.13.2 Class template function [func.wrap.func] 23.14.13.2.4 function invocation [func.wrap.func.inv]

R operator()(ArgTypes... args) const;

1 #

Returns: INVOKE<R>(f, std​::​forward<ArgTypes>(args)...) ([func.require]), where f is the target object of *this.

2 #

Throws: bad_­function_­call if !*this; otherwise, any exception thrown by the wrapped callable object.


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