pyg will be a PEG parser library formed as an internal Python DSL. it will be used in cramex, a copycat of cram with expect support.
The surface is heading to resemble Boost.Spirit: grammars are composed using a vaguely (xBNF/PEG)-like syntax enabled through operator overloading.
>>> from pyg import Rule, chr_, int_
>>> n = Rule('number')
>>> o = Rule('operator')
>>> e = Rule('expression')
>>> e %= n >> o >> n
>>> o %= chr_('+-')
>>> n %= int_
>>> e.matches('42 + 69')
True, None
>>> e.matches('69')
True, None
>>> e.matches('42 69')
False, "Failed on line 1 column 3:\n42 69\n ^\n"
This project is part of:
Hack Week 10
Activity
Comments
-
about 11 years ago by rneuhauser | Reply
https://github.com/roman-neuhauser/py-impala - Import packages and modules from arbitrary directories and files
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