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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Groups markers (...), [...] and {...}
"""
from rebulk import Rebulk
from ...options import ConfigurationException
def groups(config):
"""
Builder for rebulk object.
:param config: rule configuration
:type config: dict
:return: Created Rebulk object
:rtype: Rebulk
"""
rebulk = Rebulk()
rebulk.defaults(name="group", marker=True)
starting = config['starting']
ending = config['ending']
if len(starting) != len(ending):
raise ConfigurationException("Starting and ending groups must have the same length")
def mark_groups(input_string):
"""
Functional pattern to mark groups (...), [...] and {...}.
:param input_string:
:return:
"""
openings = ([], ) * len(starting)
i = 0
ret = []
for char in input_string:
start_type = starting.find(char)
if start_type > -1:
openings[start_type].append(i)
i += 1
end_type = ending.find(char)
if end_type > -1:
try:
start_index = openings[end_type].pop()
ret.append((start_index, i))
except IndexError:
pass
return ret
rebulk.functional(mark_groups)
return rebulk
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