def parse(fname, lexonly):
import pyggy
l, ltab = pyggy.getlexer("ansic.pyl")
p, ptab = pyggy.getparser("ansic.pyg")
p.setlexer(l)
l.setinput(preprocess(fname))
if lexonly:
while 1:
tok = l.token()
if tok is None:
break
print tok, l.value
if tok == "#ERR#":
print "error at %s:%d" % (lextab.fname, lextab.lineno)
break
else:
# parse the input
tree = p.parse()
if tree == None:
print "error at %s:%d near %s" % (lextab.fname, lextab.lineno, l.value)
else:
print "displaying tree"
# print tree
# pyggy.glr.dottree(tree)
t = pyggy.proctree(tree, ptab)
pprint.pprint(t)
print "done"
def parse(fname, lexonly):
import pyggy
l, ltab = pyggy.getlexer("ansic.pyl")
p, ptab = pyggy.getparser("ansic.pyg")
p.setlexer(l)
l.setinput(preprocess(fname))
if lexonly:
while 1:
tok = l.token()
if tok is None:
break
print tok, l.value
if tok == "#ERR#":
print "error at %s:%d" % (lextab.fname, lextab.lineno)
break
else:
# parse the input
tree = p.parse()
if tree == None:
print "error at %s:%d near %s" % (lextab.fname, lextab.lineno,
l.value)
else:
print "displaying tree"
#print tree
#pyggy.glr.dottree(tree)
t = pyggy.proctree(tree, ptab)
pprint.pprint(t)
print "done"
"""
pgy_calc.py
A simple calculator with variables
based on calc.py from the PLY web page.
"""
import sys
import pyggy
# build the lexer and parser
l,ltab = pyggy.getlexer("pyg_calc.pyl")
p,ptab = pyggy.getparser("pyg_calc.pyg")
p.setlexer(l)
while 1:
sys.stdout.write("calc > ")
line = sys.stdin.readline()
if line == "" :
break
l.setinputstr(line)
try :
tree = p.parse()
except pyggy.ParseError,e :
print "parse error at '%s'" % e.str
continue
pyggy.proctree(tree, ptab)
#!/usr/bin/python
import pyggy
# instantiate a lexer and a parser
l, ltab = pyggy.getlexer("test3.pyl")
p, ptab = pyggy.getparser("test3.pyg")
l.setinput("-")
p.setlexer(l)
# parse the input
tree = p.parse()
if tree == None:
print "error!"
else:
print pyggy.proctree(tree, ptab)
# uncomment if you have dotty
#pyggy.glr.dottree(tree)
#!/usr/bin/python
import pyggy
# instantiate a lexer and a parser
l, ltab = pyggy.getlexer("test3.pyl")
p, ptab = pyggy.getparser("test3.pyg")
l.setinput("-")
p.setlexer(l)
# parse the input
tree = p.parse()
if tree == None:
print "error!"
else:
print pyggy.proctree(tree, ptab)
# uncomment if you have dotty
# pyggy.glr.dottree(tree)
