[antlr-interest] All except...
Phil Oliver
antlr at olivercomputing.com
Tue Jun 5 08:59:53 PDT 2007
Thanks for your informative reply, Gavin. Set subtraction, even if
only for the limited case of characters in lexer rules, would be a
very useful addition. I did already define a new sequence along the
lines of what you suggested but it's not nearly as clean or abstract
as the set subtraction. Unless one has a comment or has memorized
lots of ASCII/Unicode codes, it's not possible to tell "at a glance"
what was omitted from the sequence when it's all additive. Kind of
like programming in assembly rather than using a high level language.
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