SomSom - A Metacircular SOM

[smarr]

This PR updates the core-lib with SomSom and adapts the command-line parameter handling to allow SomSom to see options.
It also sets up CI, and a few benchmarks.

PR History

This is in support of the SomSom lexer (SOM-st/SOM#29) and implements the new primitives for the String class.
The semantics for isWhiteSpace, isLetter, isDigit as identical to what is needed in the parser. Thus, it should be trivial to implement by simply exposing the already existing implementation.

Two further errors are not handled:

• failure to resolve super class does now cause a ParseError, which results in a more useful error message
• empty primitives now send Object>>#error: (see Invalid primitives SOM#27)

@ltratt this might be relevant for you as well

@sophie-kaleba could you please review this?

[ltratt]

Dumb question: can these not be implemented as SOM-level functions rather than primitives?

[smarr]

Well, I don't really want to take care of unicode support. So, I think, here the answer is for practical reasons: not really.

And, realistically, the parser/lexer has exactly this functionality already anyway, so, seems somewhat redundant to implement it again.

[ltratt]

Well, I don't really want to take care of unicode support.

Point taken.