An LL(1) parser generator used to parse YSH expressions. Also borrowed from CPython.
pgen2/driver.py 101 pgen2/grammar.py 303 pgen2/parse.py 225 pgen2/pgen.py 430 pgen2/pnode.py 67 pgen2/token.py 149 pgen2/tokenize.py 579 1,854 lines in 8 files