Creating a class member pointer function variable that points to a non-static class member function
Date : March 29 2020, 07:55 AM
Does that help The goal is to have the member variable _AddValue point to the CreateFirstValue function upon class initialization and after the first invocation of AddValue, all future calls to it will invoke CreateAnotherValue. , &CreateAnotherValue
&Foo::CreateAnotherValue
(this->*_AddValue)(whatever);
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The base class member function access child class member function directly?
Date : March 29 2020, 07:55 AM
help you fix your problem How does the base class BnSurfaceTexture know the function "requestBuffer"? class Base
{
public:
virtual void f() { /* Base */ } // could be pure virtual
virtual void g() { f(); };
};
class Derived: public Base
{
public:
virtual void f() { /* derived */ }
};
Base* pB = new Derived;
pB->g();
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How to order below code : a class member function calling a non-member function with class argument?
Tag : cpp , By : Deepak Poondi
Date : March 29 2020, 07:55 AM
Hope that helps It might be better to illustrate the problem with below code: , You can forward-declare structs and classes. So: struct Sales_data;
std::istream& read(std::istream& is, Sales_data& item);
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Javascript class member function calling member function by setInterval, couldn't access member variable
Date : March 29 2020, 07:55 AM
I hope this helps . setInterval() doesn't work with this. See here: https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval#The_this_problem function job_queue(){
this.job = null;
this.pointer = this.job;
this.job_dispatcher = null;
this.length = 0;
}
job_queue.prototype.add_job = function( job ){
if( this.job == null ){
console.log('1st');
this.job = {
job:job,
next:null
};
this.pointer = this.job;
this.length = 1;
}else{
console.log('2nd');
this.pointer.next = {
job:job,
next:null
};
this.pointer = this.pointer.next;
this.length++;
}
};
job_queue.prototype.event_handler = function(){
if( typeof this.job['job'] == 'undefined'){
console.log('??');
}
if( this.job.job != null ){
console.log('hi');
this.job.job();
this.job = this.job.next();
}
}
job_queue.prototype.start_dispatch = function(){
var self = this;
if( this.job_dispatcher == null ){
console.log( this.event_handler );
this.job_dispatcher = setInterval( function(){self.event_handler()},1000);
}
}
var jq = new job_queue();
function a(){
console.log('hi');
};
function b(){
console.log('hi2');
}
jq.add_job(a);
jq.add_job(b);
jq.add_job(a);
jq.start_dispatch();
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Invalid use of non-static member function - Class Member Function Calling Another Class Member Function
Tag : cpp , By : Matt Croydon
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further void(*task_main)() is expecting a pointer to a function. You attempt to feed it void otherMain(); which is a class method and has a hidden this parameter. This stuff gets a little whacky. Here is a great write-up on some of the badness and how to avoid it. class taskRunner
{
public:
virtual execute() = 0;
static void task_runner(void * userparam)
{
taskRunner* task = (taskRunner*)userparam;
task->execute();
}
};
void otherMain()
{
printf("Hello multitasking world!");
yield(); // a free function that calls into the system's TaskManager to preempt
}
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