74 How do I obtain a function pointer for a class member function, and later call that member function with a specific object? It's easiest to start with a typedef. For a member function, you …

Dec 3, 2009 · You cannot directly pass a pointer to a C++ functor object as a function pointer to C code (or even to C++ code). Additionally, to portably pass a callback to C code it needs to be …

The closure type for a lambda-expression with no lambda-capture has a public non-virtual non-explicit const conversion function to pointer to function having the same parameter and return …

Oct 17, 2013 · Notice how there are two arguments to takes_a_function, a function pointer, and a void pointer to some data. Also note that the function f happens to take a void pointer as an …

very conf using indeed, especially because function pointer identifiers usually resided in the middle of a typedef statement and move to the front using using. At least that's where I'm lost.

Feb 19, 2019 · I try to call a function which passed as function pointer with no argument, but I can't make it work. void *disconnectFunc; void D::setDisconnectFunc(void (*func)){ …

In your example, you could replace add_x(1) by add_x(2). To get the same change with the function pointer, you would have to change that function.

May 11, 2012 · 9 You can't convert a std::function to a function pointer (you can do the opposite). You should use either function pointers, or std::function s. If you can use std::function instead …

May 31, 2010 · 169 You can use static_cast<>() to specify which f to use according to the function signature implied by the function pointer type:

Nov 7, 2012 · To other people coming to C++ from C: don't define your callbacks as function pointers, use functors instead. Look up std::function. Then you'll be able to bind the this …