Re: Forward referencing functions in D

[Imperatorn via Digitalmars-d-learn]

On Friday, 16 October 2020 at 19:55:53 UTC, wilcro wrote:
The web page "Programming in D for C Programmers" 
(https://dlang.org/articles/ctod.html#forwardfunc) states that 
forward declarations are neither required nor permitted, and 
that the following construct is allowable:

void myfunc()
{
    forwardfunc();
}

void forwardfunc()
{
    ... //do stuff
}


However, the following code will cause a compiler error:

import std.stdio: writeln;

void main()
{

    void myfunc() {

        forwardfunc(); // onlineapp.d(8): Error: undefined 
identifier forwardfunc
    }

    void forwardfunc() {

        writeln("foo");
    }

    myfunc();

}


Evidently, I am misunderstanding something very elemental here; 
thanks for any enlightenment regarding this.

I think it might be just because you havent defined the function 
yet at that point.