i'm pretty sure i can declare it like this
class Stupid
{
public:
void (*GetFnValue( char* key ))( );
};
but i'm lost at implementation, something like
void (*fn)( )
Stupid::GetFnValue( char* key )
{
return whatev;
}
tanks
Function that returns a function pointer
Author
how do you implement a function that returns a function pointer without using typedefs that's also in a class? (in c++)
i'm pretty sure i can declare it like this
but i'm lost at implementation, something like
tanks
i'm pretty sure i can declare it like this
but i'm lost at implementation, something like
tanks
You could do:
but you should probably just typedef the function pointer.
void (*Stupid::GetFnValue( char* key ))()
{
return 0;
}
but you should probably just typedef the function pointer.
If it is C++ maybe it is worth trying to use functor instead of function pointers.
The above code could be changed to:
and the latter part:
And then you can manipulate your functions just like variables:
class Stupid
{
public:
void (*GetFnValue( char* key ))( );
};
The above code could be changed to:
class Stupid
{
public:
MyFunctorClass f;
};
and the latter part:
class MyFunctor{
public:
MyFunctor(char* key)
{
//do some stuff
}
}
And then you can manipulate your functions just like variables:
MyFunctorClass fun;
Stupid s;
s.f=fun
//use the function
s.f(argument)
and if You want a function returning a function it would just be sth like this:
MyFunctorClass Stupid::FunRetFun(argtypes arguments)
{
//do something
return SomeInstance of MyFunctorClass;
}
I don't know if thats handy in Your application, but in a few programs that I have created it worked very well and it was much more comfy to use.
Regards
If it is C++ maybe it is worth trying to use functor instead of function pointers.
The above code could be changed to:
and the latter part:
and if You want a function returning a function it would just be sth like this:
I don't know if thats handy in Your application, but in a few programs that I have created it worked very well and it was much more comfy to use.
Regards
class Stupid
{
public:
void (*GetFnValue( char* key ))( );
};
The above code could be changed to:
class Stupid
{
public:
MyFunctorClass FunRetFun(argtypes arguments)
};
and the latter part:
class MyFunctor{
public:
MyFunctor(char* key)
{
//do some stuff
}
}
and if You want a function returning a function it would just be sth like this:
MyFunctorClass Stupid::FunRetFun(argtypes arguments)
{
//do something
return SomeInstance of MyFunctorClass;
}
I don't know if thats handy in Your application, but in a few programs that I have created it worked very well and it was much more comfy to use.
Regards
This topic is closed to new replies.
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