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Questions - function-pointers

How can I register a simple callback function and pass arguments to that function?

What I would like to do is : a simple function "register_function" allowing a user to indicate a callback function to call (that this user has implemented) when calling that function with &...
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Martin Denion

c

callback

function-pointers

Votes: 0

Answers: 1

Latest Answer

In register_callback() the assignment is just: void register_callback(void (*ptr)( int *buffer, int size )) { callback = ptr; } Please note that I also added the parameter declarations to the def...
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Ingo Leonhardt

Nopass procedure pointer passed between derived types causes Segmentation fault

I want to pass a procedure pointer between two classes in modern Fortran. this procedure pointer should be called from within the second object access the first ojects' components, without having it ...
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Federico Perini

fortran

function-pointers

derived-types

Votes: 0

Answers: 2

Latest Answer

It is illegal to invoke a procedure pointer to an internal procedure, after the host procedure gets out of scope. The draft of Fortran 2015 N2123 mentions this in NOTE 15.17 NOTE 15.17 An internal pr...
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Vladimir F Героям слава

How to handle class function pointer

I want to be able to use a member variable to hold the address a function to call I got the error: cannot convert 'void (TestClass::*)(bool)' to 'void (*)(bool)' in assignment TestClass.cpp #include...
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Charles Plante

c++

function-pointers

Votes: 0

Answers: 1

Latest Answer

The error: cannot convert 'void (TestClass::*)(bool)' to 'void (*)(bool)' in assignment Is showing you that pointers to class member functions have a different type from regular function pointers. T...
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Ethan McTague

Accessing private member function via Lambda

In a project, I have a C-API which uses C-style function pointers as callbacks. In one of those callbacks, I need to access a private function of an object Foo. Note that the API-call is done within a...
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moerker

c++

lambda

callback

function-pointers

Votes: 0

Answers: 1

Latest Answer

Your code is working because Standard allows it. So first we have this (C++20 [expr.prim.lambda.closure]p2): The closure type is declared in the smallest block scope, class scope, or namespace scope ...
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ixSci

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