Reserved keywords - Githubissues

dimitriv / Ziria

A domain-specific-language and compiler for low-level bitstream processing.

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Reserved keywords #40

Closed bradunov closed 9 years ago

bradunov commented 9 years ago

Why can we not call a variable C? The word is reserved in a different context. (i.e. we cannot write let C = 3). It would be nice to remove this restriction in general, whenever it is not ambiguous.

edsko commented 9 years ago

I've now modified the parser so that it allows keywords wherever we expect identifiers. Making sure that this does not lead to ambiguity ("whenever it's not ambiguous") is difficult, but after I made one change to the comp parser, all existing tests (including WiFi tests) still yield precisely the same parse trees as before, which means it's probably okay. Also added a test that specifically tries to use a keyword as identifier.