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a2b8731d2a
* build: misc.typos Found via `codespell -q 3 --skip="./src/engine/boehm_gc" -L te,iff` * Revert 3rdParty code changes
64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
# (C) Copyright David Abrahams 2001. Permission to copy, use, modify, sell and
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# distribute this software is granted provided this copyright notice appears in
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# all copies. This software is provided "as is" without express or implied
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# warranty, and with no claim as to its suitability for any purpose.
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import re
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from b2.util import bjam_signature
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def transform (list, pattern, indices = [1]):
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""" Matches all elements of 'list' against the 'pattern'
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and returns a list of the elements indicated by indices of
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all successful matches. If 'indices' is omitted returns
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a list of first paranthethised groups of all successful
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matches.
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"""
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result = []
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for e in list:
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m = re.match (pattern, e)
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if m:
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for i in indices:
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result.append (m.group (i))
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return result
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@bjam_signature([['s', 'pattern', 'replacement']])
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def replace(s, pattern, replacement):
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"""Replaces occurrences of a match string in a given
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string and returns the new string. The match string
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can be a regex expression.
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Args:
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s (str): the string to modify
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pattern (str): the search expression
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replacement (str): the string to replace each match with
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"""
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# the replacement string may contain invalid backreferences (like \1 or \g)
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# which will cause python's regex to blow up. Since this should emulate
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# the jam version exactly and the jam version didn't support
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# backreferences, this version shouldn't either. re.sub
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# allows replacement to be a callable; this is being used
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# to simply return the replacement string and avoid the hassle
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# of worrying about backreferences within the string.
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def _replacement(matchobj):
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return replacement
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return re.sub(pattern, _replacement, s)
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@bjam_signature((['items', '*'], ['match'], ['replacement']))
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def replace_list(items, match, replacement):
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"""Replaces occurrences of a match string in a given list of strings and returns
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a list of new strings. The match string can be a regex expression.
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Args:
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items (list): the list of strings to modify.
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match (str): the search expression.
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replacement (str): the string to replace with.
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"""
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return [replace(item, match, replacement) for item in items]
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