After a painful search I have found a new bug in my libs, that comes out using DMD 1.030 (with 1.029 the following code works):

template HasLength(T) {
    // const bool HasLength = is(typeof(T.length)) || is(typeof(T.init.length));
    const bool HasLength = is(typeof(T.length));
}

void main() {
    class Foo { int length; }
    //assert(!HasLength!(typeof( new Foo )));
    assert(!HasLength!(typeof( new Foo )));
}

Output (DMD 1.030):
Error: this for length needs to be type Foo not type int

Do you have some workaround/suggestion?
Bye,
bearophile

"bearophile"  wrote
> After a painful search I have found a new bug in my libs, that comes out using DMD 1.030 (with 1.029 the following code works):
>
> template HasLength(T) {
>    // const bool HasLength = is(typeof(T.length)) ||
> is(typeof(T.init.length));
>    const bool HasLength = is(typeof(T.length));
> }
>
> void main() {
>    class Foo { int length; }
>    //assert(!HasLength!(typeof( new Foo )));
>    assert(!HasLength!(typeof( new Foo )));
> }
>
> Output (DMD 1.030):
> Error: this for length needs to be type Foo not type int
>
> Do you have some workaround/suggestion?

Any reason why you use HasLength!(typeof(new Foo)) vs HasLength!(Foo)?

-Steve

Steven Schveighoffer:
> Any reason why you use HasLength!(typeof(new Foo)) vs HasLength!(Foo)?

Nope.
(I have reverted to DMD 1.029 because 1.030 doesn't work for me, so I can't tell you if your version too produces the bug).

Bye and thank you,
bearophile