Passing a string to a callback function
Author
Hello
Maybe you could help me with this.
I have this function
Function(void(COpenGL::*Callback)());
what i want to do is to pass to this function a string.
so im thinking something like this
string funcString = "COpenGL::NeededFunc";
std::stringstream ss;
ss << funcString;
void* value;
ss >> value;
Function(value);
well of course this doesnt work - now comes my question - is there another way to what i need - or maybe this is the way but im doing it wrong. Can you help me?
Thanks!
Just modify you callback signature to include a string argument. In the simplest case:
If your intention is to do a callback to a method (it seems so), just do the same for the method callback signature:
Hope that helps!
#include <iostream>typedef void CallbackFunction(const std::string &);void Test(CallbackFunction *callback) { callback("Hello World");}void MyCallback(const std::string &someString) { std::cout << someString << std::endl;}int main() { Test(&::MyCallback);}If your intention is to do a callback to a method (it seems so), just do the same for the method callback signature:
class COpenGL { void (COpenGL::*callback)(const std::string &); void myCallback1(const std::string &someString) { std::cout << "MyCallback1: " << someString << std::endl; } void myCallback2(const std::string &someString) { std::cout << "MyCallback2: " << someString << std::endl; } void test() { this->callback = &COpenGL::myCallback1; (this->*callback)("Hello World"); this->callback = &COpenGL::myCallback2; (this->*callback)("Hello World"); }};Hope that helps!
Author
Thanks - i decided to do a stl map - and asociate a function to a string - its suite what i need
Ah, so you wanted to call a function by name. Sorry, I totally misunderstood your intention.
Your map<> is the right way to go. C++ doesn't support reflection, so creating a name lookup yourself is the only possible solution.
Your map<> is the right way to go. C++ doesn't support reflection, so creating a name lookup yourself is the only possible solution.
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