def get_lexer(filename):
prefix = os.path.basename(filename)[:-4]
temp = NamedTemporaryFile(prefix = prefix, suffix = "lextab.py")
lex = {}
pylly.parsespec(filename, temp.name)
exec temp.read() in lex
temp.close()
return lexer.lexer(lex['lexspec'])
def generate(fname, targ, debug=0, forcegen=0) :
"""
Generate tables from a grammar or lexer spec file.
"""
import os.path
if forcegen or not os.path.exists(targ) or _mtime(targ) < _mtime(fname) :
print "generating %s from %s" % (targ, fname)
if fname[-4:] == ".pyl" :
from pyggy import pylly
pylly.parsespec(fname, targ, debug=debug)
elif fname[-4:] == ".pyg" :
from pyggy import pyggyc
pyggyc.parsespec(fname, targ, debug=debug)
else :
raise ApiError("bad spec filename %s" % fname)
