> On 02 Oct 2015, at 20:50, Peter Uhnák <i.uh...@gmail.com> wrote:
>
> Hi,
>
> What options do we have in terms of type annotations in Pharo?
>
> I stumbled upon TypePlug this
> https://marcusdenker.de/talks/08ParisTypes/08ParisTypePlug.pdf
> <https://marcusdenker.de/talks/08ParisTypes/08ParisTypePlug.pdf> (or rather
> this http://scg.unibe.ch/archive/masters/Hald07a.pdf
> <http://scg.unibe.ch/archive/masters/Hald07a.pdf> )
>
> which enabled type annotation for Squeak such as
> ~~~~~~~~~~~~~~~~
> Fruit>>mixWith: aFruit <:type: Fruit :>
> ^ (Array with: self with: aFruit) <:type: Array E: Fruit :>
> ~~~~~~~~~~~~~~~~
> Orange>>color
> ^ (Color orange) <:type: Color :>
> ~~~~~~~~~~~~~~~~
> (or even blocks)
> [ :a1 <:type: Integer :> :a2 <:type: Integer :> | a1 + a2 ]
> ~~~~~~~~~~~~~~~~
>
> obviously something like this wouldn't even compile in Pharo (does Sqeak have
> different syntax for pragmas, or did the TypePlug change the syntax?)
>
This was based on a hacked compiler (using a smack grammar on top of a code
generator based on RB Nodes similar to the one we have now in
Opal). We changed the grammar to parse these kind of annotations.
Marcus
