mirror of https://github.com/python/cpython.git
39 lines
907 B
Python
39 lines
907 B
Python
import itertools
|
|
|
|
|
|
def generate_tokens(tokens):
|
|
numbers = itertools.count(0)
|
|
for line in tokens:
|
|
line = line.strip()
|
|
|
|
if not line or line.startswith("#"):
|
|
continue
|
|
|
|
name = line.split()[0]
|
|
yield (name, next(numbers))
|
|
|
|
yield ("N_TOKENS", next(numbers))
|
|
yield ("NT_OFFSET", 256)
|
|
|
|
|
|
def generate_opmap(tokens):
|
|
for line in tokens:
|
|
line = line.strip()
|
|
|
|
if not line or line.startswith("#"):
|
|
continue
|
|
|
|
pieces = line.split()
|
|
|
|
if len(pieces) != 2:
|
|
continue
|
|
|
|
name, op = pieces
|
|
yield (op.strip("'"), name)
|
|
|
|
# Yield independently <>. This is needed so it does not collide
|
|
# with the token generation in "generate_tokens" because if this
|
|
# symbol is included in Grammar/Tokens, it will collide with !=
|
|
# as it has the same name (NOTEQUAL).
|
|
yield ("<>", "NOTEQUAL")
|