Re: Code example for function/delegate as template argument ?

[Basile B. via Digitalmars-d-learn]

On Wednesday, 4 May 2016 at 11:19:59 UTC, chmike wrote:

I think you misunderstood the second question.

Here is another attempt with an example.

// function accepting a function as argument
void foo(function void fg(int)) {
    fg(5);
}

// A class with a none static method with the same signature as the argument function of foo

class Bar {
    void fizz(int a) { writefln("Arg: %s", a); }
}

// An instance of class Bar
auto bar = new Bar;

// Calling foo by passing bar and the method fizz so that bar.fizz() is called when foo calls fg

foo( ??? );

Does the argument type need to be a delegate ?

It's much more simple then. You need

void foo(void delegate int() dg) {dg(5);}

and yes it must be a delegate.