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ure_span.py

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# test match.span(), and nested spans

try:

import ure as re

except ImportError:

try:

import re

except ImportError:

print("SKIP")

raise SystemExit

try:

m = re.match(".", "a")

m.span

except AttributeError:

print('SKIP')

raise SystemExit

def print_spans(match):

print('----')

try:

i = 0

while True:

print(match.span(i), match.start(i), match.end(i))

i += 1

except IndexError:

pass

m = re.match(r'(([0-9]*)([a-z]*)[0-9]*)','1234hello567')

print_spans(m)

m = re.match(r'([0-9]*)(([a-z]*)([0-9]*))','1234hello567')

print_spans(m)

# optional span that matches

print_spans(re.match(r'(a)?b(c)', 'abc'))

# optional span that doesn't match

print_spans(re.match(r'(a)?b(c)', 'bc'))