[antlr-interest] lexing tips needed... (or, could I use predicate in lexer rule?)

[Richard Clark]

If you're designing this language, you're better off changing the
design to be unambiguous. Seriously.

For example, what do you do with "2.1.toString()"? Or the "2.e3"
example (which, in every other language I've seen is "2.0e3").

Otherwise, be prepared to break things apart a little too much in the
lexer and have the parser stitch them back together again, as in "2.1"
becomes INT DOT INT and it's the parser's job to recognize the float.

 ...Richard