Question

Ok this question may be shocking for javascript haters and hard-core developers, forgive me!

I love the way I can write a callback function in javascript

var on = function(isTrue, doThis) {if (isTrue) doThis();}

Is there any possibility to replicate the same idea in C ? I know it’s type dependent.
More and less this is my case:

I have multiple booleans and multiple filters so my use would be, instead of writing

if (thisIs == true) executeThisVoid(passingThisStruct)

I would love to write:

on(thisIs, function(struct){ do this and this})

or simply

on(thisIs, executeThisVoid);

Many thanks everybody.

Answer 1

OK, here goes. First define on:

void on(int thisIs, void (*executeThis)(void)) {
    if (thisIs)
        (*executeThis)();
}

Then, define someVoid:

void someVoid(void) {
    /* ... */
}

Then, within another function, call on:

on(1, someVoid);