How to Correctly Store Member Function Pointers in a `std::function` Map?

Storing Member Function Pointers in std::function Map for a Single Class

When attempting to store function pointers to member functions of a specific class in a std::function map, it's crucial to understand the requirement for a non-static member function to be called with an object.

In the provided code, the error stems from the incorrect function signature of std::function. Since non-static member functions always pass "this" as an implicit argument, the signature should be modified to include the object as the first parameter.

The corrected code snippet would be:

To further bind a function with parameters, C placeholders or C 11 lambdas can be utilized. Here are examples for these approaches:

Using Placeholders:

Using Lambdas (C 11):

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