>From the compiler perspective the whole world (except some statically 
inferrable parts around literal integer) is untyped. The typing 
will only be used for checking the software contract (currently nothing is 
checked).

The whole parser/compiler except for some glue code is developed in typed 
Smalltalk. This (wholly typed) part is translated to java source; here we 
use the typing information to satisfy the java translation.

Cheers,

Wouter
On Monday, December 23, 2013 8:11:23 AM UTC+1, Simon Ochsenreither wrote:
>
> Yes, thanks for the hints!
>
> How did you design/implement optional typing, especially the border 
> between types and untyped parts of the program/library?
>

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