This might sound silly, but how about if D stopped allowing
0..2 as a range, and instead just said "invalid floating-point
number"?
Fixing it en masse would be pretty trivial... just run a regex to
replace
"\b(\d+)\.\."
with
"\1 .. "
and you're good to go.
(Or if you want more accuracy, just take the compiler output and
feed it back with a fix -- that would work too.)
The benefit, though, is that now you can do maximal munch without
worrying about this edge case... which sure makes it easier to
make a lexer.
Thoughts?
