def optional(item, reverse=False):
from yargy.api import or_, empty
a = empty()
b = item
if reverse:
a, b = b, a
return or_(a, b)
def optional(item, reverse=False):
from yargy.api import or_, empty
a = empty()
b = item
if reverse:
a, b = b, a
return or_(a, b)
def visit_RepeatableOptionalRule(self, item):
from yargy.api import forward, or_, rule, empty
child = self.visit(item.rule)
temp = forward()
return temp.define(or_(
rule(child, temp),
child,
empty(),
))
def repeatable_optional(item,
reverse_repeatable=False,
reverse_optional=False):
from yargy.api import forward, or_, rule, empty
temp = forward()
a = empty()
b = rule(item, temp)
c = item
if reverse_repeatable:
b, c = c, b
if reverse_optional:
a, b, c = b, c, a
return temp.define(or_(a, b, c))
def repeatable_optional(item, reverse_repeatable=False, reverse_optional=False):
from yargy.api import forward, or_, rule, empty
temp = forward()
a = empty()
b = rule(item, temp)
c = item
if reverse_repeatable:
b, c = c, b
if reverse_optional:
a, b, c = b, c, a
return temp.define(
or_(
a,
b,
c
)
)
def visit_OptionalRule(self, item):
from yargy.api import or_, empty
child = self.visit(item.rule)
return or_(child, empty())