Tagged Questions
17
votes
3answers
480 views
Non-pointer typedef of member functions not allowed?
After getting an answer to this question I discovered there are two valid ways to typedef a function pointer.
typedef void (Function) ();
typedef void (*PFunction) ();
void foo () {}
Function * p = ...
8
votes
3answers
1k views
Table of function pointers within a class C++
I'm trying to make a table of function pointers within a class. I haven't been able to find any examples of this online, most involve using member function pointers outside of their class.
for ...
8
votes
4answers
336 views
Why the size of a pointer to a function is different from the size of a pointer to a member function?
Isn't a pointer just an address? Or I'm missing something?
I tested with several types of pointers:
pointers to any variables is the same (8B on my platform)
pointers to functions are the same ...
7
votes
5answers
1k views
How to define a general member function pointer
I have created a Timer class that must call a callback method when the timer has expired. Currently I have it working with normal function pointers (they are declared as void (*)(void), when the ...
6
votes
4answers
7k views
Passing member function pointer to member object in c++
I have a problem with using a pointer to function in C++. Here is my example:
#include <iostream>
using namespace std;
class bar
{
public:
void (*funcP)();
};
class foo
{
public:
bar ...
6
votes
2answers
889 views
C++: Using function pointers with member functions
I'm trying to pass a function to another function as a parameter, and they both happen to be member functions of the same class.
I'm getting a weird error and I can't figure out what the problem is.
...
5
votes
2answers
212 views
Pointers to members representations
I'm trying to make some callbacks from member functions and everything was ok until I tried to use a template class derived from 2 classes as callback object when I got the following error:
error ...
5
votes
3answers
581 views
Function pointers to member functions in C++
I need to call a method that expects a function pointer, but what I really want to pass to it is a functor. Here's an example of what I'm trying to do:
#include <iostream>
#include ...
4
votes
4answers
291 views
To pass a pointer to a member function
I have an class with instance functions (or methods?). From within an instance, I try to pass pointers to those functions to a library. The library expects static functions.
When I pass my pointers ...
4
votes
3answers
2k views
C++ Pointer to virtual function
If you have a struct like this one
struct A {
void func();
};
and a reference like this one
A& a;
you can get a pointer to its func method like this:
someMethod(&A::func);
Now ...
4
votes
4answers
953 views
c++ store a pointer to a member function of unknown class
I want to store a pointer to an object and a pointer to it's method of known signature. If I know the class then this pointer have type:
int (MyClass::*pt2Member)(float, char, char)
But how can i ...
4
votes
1answer
115 views
Pointer to function member and non-member
Abstract
I have a class that stores a optimization problem and runs a solver on that problem.
If the solver fails I want to consider a sub-problem and solve using the same solver (and class).
...
3
votes
4answers
654 views
Start a thread using a method pointer
I'm trying to develop a thread abstraction (POSIX thread and thread from the Windows API), and I would very much like it to be able to start them with a method pointer, and not a function pointer.
...
3
votes
3answers
1k views
Cast member function for create_pthread() call
I want to stop the warning
server.cpp:823: warning: converting from 'void* (ClientHandler::)()' to 'void ()(void)'
in the call:
pthread_create(th, NULL,
(void* (*)(void*)) ...
3
votes
2answers
242 views
get function ptr to member function of instanced class?
class gfx {
void resize(int x, int y);
}
gfx g;
can i cast g.resize to a 'void (*)(int, int)' somehow?
