a pointer to a function, which can be stored in a variable allows a run-time choice of which function to run
0
votes
4answers
50 views
Using a function pointer
I have a function in C that is crashing my code and I'm having a hard time figuring out what is going on. I have a function that looks like this:
#define cond int
void Enqueue(cond (*cond_func)());
...
5
votes
3answers
105 views
Function pointer vs Function reference
In the code below, function-pointer and what i considered as "function-reference" seems to have identical semantics:
#include <iostream>
using std::cout;
void func(int a) {
cout << ...
2
votes
0answers
45 views
Strange behaviour, initialize a function pointer with an int?
Accidentally, I found this code compiles on VS2012.
typedef void (*func)();
func f = func(12);
f is initialized with an integer 12 as its address.
as far as I know, cast from integer to a function ...
visual-studio-2012
0
votes
3answers
22 views
How to pass a bidimensional array as an argument to a function?
I'm trying to make a function that displays a certain matrix;
That's what I've tried to do:
void print(int n,int a[n][n])
{
for(int i=1;i<=n;i++)
{
for(int ...
0
votes
2answers
29 views
C++ map of “events” and member function pointers
I've managed to write a template class to work like a callback, learned from the accepted answer of this question How to define a general member function pointer.
I wish to have a map of string keys ...
0
votes
1answer
48 views
C++ Implementing a Button with member-function callback
I am trying to implement a simple GUI component in C++. The 'Button' class exists in a library that is completely de-coupled from the main program. I want to be able to pass a function-pointer to a ...
2
votes
3answers
35 views
Passing states of StateMachine as parameter to a function pointer C++ OOP
I'm fairly new to the concept of function pointer in C++, so I don't know how to write my question properly. Please bear with me.
Basically, what I'm trying to do is to create a Button object whose ...
20
votes
2answers
363 views
Are two function pointers to the same function always equal?
Does the C++ standard guarantee that two pointers to a function always compare equal? I understand that this will normally be true for non-inline functions. But if there is an inline function and a ...
1
vote
1answer
26 views
How to assign dlsym()'s return value to function type?
My problem is as follows:
I have a structure containing function pointers like this:
typedef void (CALLING_COVNENTION * functionType_t) (/*...*/);
typedef struct myFuncpointerStruc_s
{
/*...*/
...
0
votes
1answer
54 views
Passing getter/setter as a method reference
I have a bunch of entries like these two:
if (update) {
if (activity.getName() == null) {
logger.debug(" Setting name on " + id);
} else
...
3
votes
2answers
32 views
boost::bind thread for pointer to function with argument
I have a function foo(myclass* ob) and I am trying to create a consumer thread using consumer_thread(boost::bind(&foo)(&ob))
The code does not compile which I believe is due to my ...
3
votes
5answers
51 views
How can I pass a module's function as a reference to another module in Perl?
How can I pass a reference to a module's function as parameter in a function call of another module?
I tried the following (simple example):
This is the module that has a function (process_staff) that ...
1
vote
1answer
29 views
error: expected primary-expression before ')' when passing function-pointer to a function
Following is the function that takes function prototype as an argument:
void callAdded(void (*unitAdded)(rates));
When I do:
callAdded((&ConverterProxy::unitAdded)(rates));
...
0
votes
1answer
56 views
Function declarations with * in front and void returning values? [duplicate]
So, I'm reading Beej's Guide to Network Programming, and he uses this function:
void *get_in_addr(struct sockaddr *sa)
{
if (sa->sa_family == AF_INET) {
return &(((struct ...
0
votes
1answer
42 views
Currying a generic method / function without loosing generic parameters
I just realized that my generic method:
def method[A](list: List[A]): A = { ... }
will result in a non-generic function type
val methodFun = method _
-> methodFun : (scala.List[Nothing]) => ...
