Re: return the other functions of the void main()

[Dennis Ritchie via Digitalmars-d-learn]

On Thursday, 9 April 2015 at 11:07:05 UTC, Rikki Cattermole wrote:

Sure when:

import std.traits : ReturnType;
import std.stdio : writeln;

static assert(is(ReturnType!writeln == int));

Thanks.

On Thursday, 9 April 2015 at 11:09:43 UTC, John Colvin wrote:

Yes, because writeln returns nothing, but why would you do that? Just put the return on the next line, it's more readable. Or, in the example above, just omit it entirely as the return is implicit.

I quite often have to write similar designs:

-----
import std.stdio;

void main() {

        auto a = [ 1, 2, 3, 4, 5 ];

        foreach (e; a) {
                if (e == 4) {
                        writeln("Yes");
                        return;
                }
        }
        
        writeln("No");
}
-----

But is not it easier to write :)

import std.stdio;

void main() {

        auto a = [ 1, 2, 3, 4, 5 ];

        foreach (e; a) {
                if (e == 4) {
                        return writeln("Yes");
                }
        }
        
        writeln("No");
}