Next, we create an array of up to 16 slots. The rest of the class is just 'mechanics': being able to call the function, checking if the mapping was successful. Let's work this through by using a time-honoured C function: qsort.Īssume you have some infrastructure that allows you to write the following:Ĭlass ClassWithCallback Įssentially, this is a simple decorator class: the constructor maps the input - a C++ class pointer and a C++ member function pointer - and identifies the unique C callback function for it. Using C Function Pointers as C Function Pointers Our computer scientists (well, there is only one of them, and he isn't a really good scientist either) came up with an ingenious way for programmers to transcend classical logic and pass member functions. Clearly that is too easy: static class member functions are mostly the same as plain old C functions, so in a way that answer is simply cheating. Pointers to functions expecting C function pointers.įor example, a typical question is How to pass a method to qsort?, and the answer marked as 'correct' says you should provide the address of a static function. The consensus on the internet is that you cannot pass C++ member function The research department here at is pleased to announce another totally usefull study.

Using C++ Member Functions for C Function Pointers

Stuff that really didn't fit in anywhere else.

eftepede is a FTP server that doesn't suck.

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shicks is a mail server for Windows and Linux.

gtools is a collection of various tools in one installer.

rfstool can access Linux ReiserFS partitions from Windows.

pserv.cpl can control services, devices and lots of other things.

Computed GOTOs in Java - adding missing language features.

Obfuscating Python - what good is a language that you cannot obfuscate?.

Best practices for Quicksort implementations.

Calculating Pi to an arbitrary number of digits.

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Calculating PI to an arbitrary number of digits.

Elegant, well-documented Quicksort variant.

Calculating PI to an arbitrary number of digits and.

C++ Member Functions with C Function Pointers.

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