Hello,

I don't understand why the compiler refuses the code below, with the error
__trials__.d(33): found '.' when expecting ';' following statement
(Note that method set returns this.)

class C {
    int i,j;
    this (int i) {
        this.i = i;
    }
    C set (int j) {
        this.j = j;
        return this;
    }
    override string toString () {
        return format("C(%s,%s)", i,j);
    }
}

void main () {
    c = new C(1).set(3);	///////
    writeln(c);
}

Well, the example is somewhat artificial, but this idiom is highly useful.


Denis
-- -- -- -- -- -- --
vit esse estrany ☣

spir.wikidot.com

On Mon, 08 Nov 2010 14:39:43 -0500, spir <denis.spir@gmail.com> wrote:

> Hello,
>
> I don't understand why the compiler refuses the code below, with the error
> __trials__.d(33): found '.' when expecting ';' following statement
> (Note that method set returns this.)
>
> class C {
>     int i,j;
>     this (int i) {
>         this.i = i;
>     }
>     C set (int j) {
>         this.j = j;
>         return this;
>     }
>     override string toString () {
>         return format("C(%s,%s)", i,j);
>     }
> }
>
> void main () {
>     c = new C(1).set(3);	///////

To the compiler, this means:

c = new (C(1).set(3));

What you want is:

c = (new C(1)).set(3);

Java implies this, but D does not.

-Steve

spir napisał:

> Hello,
> 
> I don't understand why the compiler refuses the code below, with the error
> __trials__.d(33): found '.' when expecting ';' following statement
> (Note that method set returns this.)
> 
> class C {
>     int i,j;
>     this (int i) {
>         this.i = i;
>     }
>     C set (int j) {
>         this.j = j;
>         return this;
>     }
>     override string toString () {
>         return format("C(%s,%s)", i,j);
>     }
> }
> 
> void main () {
>     c = new C(1).set(3);	///////
>     writeln(c);
> }
> 
> Well, the example is somewhat artificial, but this idiom is highly useful.

C c = (new C(1)).set(3);

-- 
Tomek