Why would one use function pointers to member method in C++?

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情书的邮戳
情书的邮戳 2021-02-10 23:48

A lot of C++ books and tutorials explain how to do this, but I haven\'t seen one that gives a convincing reason to choose to do this.

I understand very well why functio

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  •  情话喂你
    2021-02-11 00:20

    A pointer to a member function is object-agnostic. You need it if you want to refer to a function by value at run-time (or as a template parameter). It comes into its own when you don't have a single object in mind upon which to call it.

    So if you know the function, but don't know the object AND you wish to pass this knowledge by value, then point-to-member-function is the only prescribed solution. Iraimbilanja's example illustrates this well. It may help you to see my example use of a member variable. The principle is the same.

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