The following doesn't compile:

class A : Exception {}
void main() {
    throw new A;
}

DMD outputs: "constructor this (char[]msg) does not match argument types ()"
If I write throw new A("something"); instead, it outputs exactly the same.

Two more things: someone (sorry, can't remember) once said that error messages regarding constructor didn't specify which line. That's annoying.

Also, I can't remember which was the syntax for not writing
"this(char[]msg){super(msg);}" for each class derived from Exception. Can
somebody please refresh my mind?

-------------------------
Carlos Santander


---

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> The following doesn't compile:
>
> class A : Exception {}
> void main() {
>     throw new A;
> }
>
> DMD outputs: "constructor this (char[]msg) does not match argument types
()"
> If I write throw new A("something"); instead, it outputs exactly the same.

You have to satisfy one of the super class' constructors; the compiler only knows how to insert a call to super() if it takes no parameters, you must explicitly call one otherwise.

> Two more things: someone (sorry, can't remember) once said that error messages regarding constructor didn't specify which line. That's annoying.
>
> Also, I can't remember which was the syntax for not writing
> "this(char[]msg){super(msg);}" for each class derived from Exception. Can
> somebody please refresh my mind?

Constructors aren't inherited like other member functions (which I think they should...) so you have to write that.