Function object

In computer programming, a function object is a construct allowing an object to be invoked or called as if it were an ordinary function, usually with the same syntax (a function parameter that can also be a function). In some languages, particularly C++, function objects are often called functors (not related to the functional programming concept).

This article is about the computer programming concept of function objects. For functors in mathematics, see Functor. For the related concept in functional programming, see Functor (functional programming).
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