Javascript Support

[F35H]

I plan on using this for use with Javascript. The syntax is so similar it's worth using the same tool.

With --loop-switch it's almost perfect* - the string obviously can't be a pointer though.

The other settings can be used easily as well replacing goto with a break or continue.

I might as well leave an issue here for the future.

*Many times I speak mid-idea. Likely the most efficient for anything is bit-vectors, but this will always be contextual and dependent on context.

**Hilarious, but because of the way continue statements work in javascript, --loop-switch is probably the only one viable right now without copious amounts of work in comparison.

[skvadrik]

Hi @F35H , thanks for the heads up. There is an idea to add syntax files (user-supplied configs) that will make it easier to use re2c with different language backends. This is not implemented yet, but I'm slowly rewriting codegen subsystem to make it possible.

[skvadrik]

There is no need for a string to be a byte stream. The details can be encapsulated behind generic API and you can provide suitable definitions for YYPEEK, YYSKIP and other primitives using the string type and index operator.

[F35H]

I got it to work appropriately [and viably].

The main thing that makes it difficult for javascript [beyond things such as types, pointers, etc. ] is that continue statements only work with labels that are defined above them only work in loops. It essentially makes it where --loop-switch is the only real option without having to over-analyze each case.

Other than that, it's just a matter of replacing variables where appropriate and organizing "blocks" into functions. Cntrl-H is absolutely your friend [although, now that I've tried it, free-form style with YYPEEK, YYSKIP, etc. is also clearly your friend].

[skvadrik]

Experimental JS support was added on syntax-files branch: 74ace08. See https://github.com/skvadrik/re2c/tree/syntax-files/examples/js for examples (they use nodejs as the examples run in a non-browser environment).