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Diffstat (limited to 'Tools/Scripts/webkitpy/common/memoized.py')
-rw-r--r-- | Tools/Scripts/webkitpy/common/memoized.py | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/Tools/Scripts/webkitpy/common/memoized.py b/Tools/Scripts/webkitpy/common/memoized.py deleted file mode 100644 index dc844a53a..000000000 --- a/Tools/Scripts/webkitpy/common/memoized.py +++ /dev/null @@ -1,55 +0,0 @@ -# Copyright (c) 2010 Google Inc. All rights reserved. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are -# met: -# -# * Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# * Redistributions in binary form must reproduce the above -# copyright notice, this list of conditions and the following disclaimer -# in the documentation and/or other materials provided with the -# distribution. -# * Neither the name of Google Inc. nor the names of its -# contributors may be used to endorse or promote products derived from -# this software without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -# Python does not (yet) seem to provide automatic memoization. So we've -# written a small decorator to do so. - -import functools - - -class memoized(object): - def __init__(self, function): - self._function = function - self._results_cache = {} - - def __call__(self, *args): - try: - return self._results_cache[args] - except KeyError: - # If we didn't find the args in our cache, call and save the results. - result = self._function(*args) - self._results_cache[args] = result - return result - # FIXME: We may need to handle TypeError here in the case - # that "args" is not a valid dictionary key. - - # Use python "descriptor" protocol __get__ to appear - # invisible during property access. - def __get__(self, instance, owner): - # Return a function partial with obj already bound as self. - return functools.partial(self.__call__, instance) |