Add constructor sharing

[Frotty]

Like in java, I would like to be able to call other constructors from within a constructor like this:

construct(real x, real y, angle facing)
        this(x,y)
        dummy.setFacing(..)
construct(real x, real y)
        dummy = createUnit(..)

When trying to provide a nice constructor API with wurst, you end up with many boilerplate constructors, e.g. in Fx and there are bigger examples in EBR, where I had to copy the same, long constructor several times, wasting a whole page with almost same code.

It would be fine to enforce the limit, that it has to be the first statement inside the constructor.

[peq]

You can still extract common stuff into functions until this is implemented.

[Frotty]

yes, i know that you can workround this with init funcstions and such and i was about to add it to the ticket - but it shouldn't really matter to the validity of this enhancement.

[peq]

Well, you said that this feature would allow you to save a lot of lines, but I think it is only 2-3 lines per constructor if you call a function instead. So the ticket is still valid, but maybe not so high in priority.

[Frotty]

The biggest problem with this is inheritance. You have to call super first so you cannot call your custom init function. Either do this or https://github.com/peq/WurstScript/issues/158 to fix it please.