I introduced in my "Mouse" two "a until b" expressions: a*+b and a++b,
meaning (!ba)*b and (!ba) (!ba)*b.
They have an efficient implementation with Java "while" and are useful,
among other things, to skip a bad portion of input.
Regards
Roman
On 2017-05-28 23:02, a3m...@uwaterloo.ca wrote:
With regard to the "skip to" expression, if it's helpful, I got good
performance results implementing x -> t as a fresh non-terminal (like
repetition):
N := t / x N
It uses the ordered choice property of PEGs to avoid double-testing t
as in (!t x)* t
Regards,
Aaron Moss
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