def RightAssoc(*pairs):
return lambda subexpr: \
recur(lambda expr:
seclude(subexpr + alt([peg + expr + oper
for peg, oper in pairs]).maybe()))
def Node(margin):
return P.seclude(P.match(r'( {%d,})' % margin)
+ swallow(lambda indent:
(line + Node(len(indent)+1).star()) >> P.hug))
def LeftAssoc(*pairs):
return lambda subexpr: \
seclude(subexpr + alt([peg + subexpr + oper
for peg, oper in pairs]).star())
