[antlr-interest] Conditional lexing

[Mike Lischke]

> The next step is now to keep a global flag to track when a version comment is active so I can properly handle the trailing '*/' part. What is usually used for such a flag, USERx?


Using USERx doesn't work for at least two reasons: the lexer state seems to be reset for each token run and using it in a gated semantic predicate leads to a dfa which excludes the gated expression, so it is not even attempted to match it. Solved by using a member var.

Mike
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