mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-11-25 21:11:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

SF patch #720991 by Gary Herron:

Browse source 
A small fix for bug #545855 and Greg Chapman's
addition of op code SRE_OP_MIN_REPEAT_ONE for
eliminating recursion on simple uses of pattern '*?' on a
long string.
This commit is contained in:
Guido van Rossum 2003-04-14 17:59:34 +00:00
parent 44c62ef5ee
commit 41c99e7f96
7 changed files with 89 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

13
Lib/test/test_sre.py
View file

@ -83,6 +83,19 @@ test(r"""sre.match(r'(a)?a','a').lastindex""", None)
test(r"""sre.match(r'(a)(b)?b','ab').lastindex""", 1)
test(r"""sre.match(r'(?P<a>a)(?P<b>b)?b','ab').lastgroup""", 'a')
# bug 545855 -- This pattern failed to cause a compile error as it
# should, instead provoking a TypeError.
test(r"""sre.compile('foo[a-')""", None, sre.error)
# bugs 418626 at al. -- Testing Greg Chapman's addition of op code
# SRE_OP_MIN_REPEAT_ONE for eliminating recursion on simple uses of
# pattern '*?' on a long string.
test(r"""sre.match('.*?c', 10000*'ab'+'cd').end(0)""", 20001)
test(r"""sre.match('.*?cd', 5000*'ab'+'c'+5000*'ab'+'cde').end(0)""", 20003)
test(r"""sre.match('.*?cd', 20000*'abc'+'de').end(0)""", 60001)
# non-simple '*?' still recurses and hits the recursion limit
test(r"""sre.search('(a|b)*?c', 10000*'ab'+'cd').end(0)""", None, RuntimeError)
if verbose:
print 'Running tests on sre.sub'