175 lines
5.2 KiB
Python
175 lines
5.2 KiB
Python
#
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# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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# Portions of the following are derived from the compat.py file in
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# Twisted, under the following copyright:
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#
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# Copyright (c) 2001-2004 Twisted Matrix Laboratories
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__doc__ = """
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Compatibility idioms for __builtin__ names
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This module adds names to the __builtin__ module for things that we want
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to use in SCons but which don't show up until later Python versions than
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the earliest ones we support.
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This module checks for the following __builtin__ names:
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all()
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any()
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bool()
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dict()
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True
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False
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zip()
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Implementations of functions are *NOT* guaranteed to be fully compliant
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with these functions in later versions of Python. We are only concerned
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with adding functionality that we actually use in SCons, so be wary
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if you lift this code for other uses. (That said, making these more
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nearly the same as later, official versions is still a desirable goal,
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we just don't need to be obsessive about it.)
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If you're looking at this with pydoc and various names don't show up in
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the FUNCTIONS or DATA output, that means those names are already built in
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to this version of Python and we don't need to add them from this module.
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"""
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__revision__ = "src/engine/SCons/compat/builtins.py 2523 2007/12/12 09:37:41 knight"
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import __builtin__
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try:
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all
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except NameError:
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# Pre-2.5 Python has no all() function.
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def all(iterable):
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"""
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Returns True if all elements of the iterable are true.
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"""
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for element in iterable:
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if not element:
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return False
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return True
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__builtin__.all = all
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all = all
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try:
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any
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except NameError:
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# Pre-2.5 Python has no any() function.
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def any(iterable):
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"""
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Returns True if any element of the iterable is true.
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"""
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for element in iterable:
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if element:
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return True
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return False
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__builtin__.any = any
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any = any
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try:
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bool
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except NameError:
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# Pre-2.2 Python has no bool() function.
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def bool(value):
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"""Demote a value to 0 or 1, depending on its truth value.
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This is not to be confused with types.BooleanType, which is
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way too hard to duplicate in early Python versions to be
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worth the trouble.
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"""
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return not not value
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__builtin__.bool = bool
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bool = bool
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try:
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dict
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except NameError:
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# Pre-2.2 Python has no dict() keyword.
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def dict(seq=[], **kwargs):
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"""
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New dictionary initialization.
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"""
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d = {}
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for k, v in seq:
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d[k] = v
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d.update(kwargs)
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return d
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__builtin__.dict = dict
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try:
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False
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except NameError:
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# Pre-2.2 Python has no False keyword.
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__builtin__.False = not 1
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# Assign to False in this module namespace so it shows up in pydoc output.
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False = False
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try:
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True
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except NameError:
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# Pre-2.2 Python has no True keyword.
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__builtin__.True = not 0
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# Assign to True in this module namespace so it shows up in pydoc output.
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True = True
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#
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try:
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zip
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except NameError:
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# Pre-2.2 Python has no zip() function.
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def zip(*lists):
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"""
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Emulates the behavior we need from the built-in zip() function
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added in Python 2.2.
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Returns a list of tuples, where each tuple contains the i-th
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element rom each of the argument sequences. The returned
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list is truncated in length to the length of the shortest
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argument sequence.
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"""
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result = []
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for i in xrange(min(map(len, lists))):
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result.append(tuple(map(lambda l, i=i: l[i], lists)))
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return result
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__builtin__.zip = zip
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#if sys.version_info[:3] in ((2, 2, 0), (2, 2, 1)):
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# def lstrip(s, c=string.whitespace):
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# while s and s[0] in c:
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# s = s[1:]
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# return s
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# def rstrip(s, c=string.whitespace):
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# while s and s[-1] in c:
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# s = s[:-1]
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# return s
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# def strip(s, c=string.whitespace, l=lstrip, r=rstrip):
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# return l(r(s, c), c)
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#
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# object.__setattr__(str, 'lstrip', lstrip)
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# object.__setattr__(str, 'rstrip', rstrip)
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# object.__setattr__(str, 'strip', strip)
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