+++ /dev/null
-"""Record of phased-in incompatible language changes.
-
-Each line is of the form:
-
- FeatureName = "_Feature(" OptionalRelease "," MandatoryRelease ","
- CompilerFlag ")"
-
-where, normally, OptionalRelease < MandatoryRelease, and both are 5-tuples
-of the same form as sys.version_info:
-
- (PY_MAJOR_VERSION, # the 2 in 2.1.0a3; an int
- PY_MINOR_VERSION, # the 1; an int
- PY_MICRO_VERSION, # the 0; an int
- PY_RELEASE_LEVEL, # "alpha", "beta", "candidate" or "final"; string
- PY_RELEASE_SERIAL # the 3; an int
- )
-
-OptionalRelease records the first release in which
-
- from __future__ import FeatureName
-
-was accepted.
-
-In the case of MandatoryReleases that have not yet occurred,
-MandatoryRelease predicts the release in which the feature will become part
-of the language.
-
-Else MandatoryRelease records when the feature became part of the language;
-in releases at or after that, modules no longer need
-
- from __future__ import FeatureName
-
-to use the feature in question, but may continue to use such imports.
-
-MandatoryRelease may also be None, meaning that a planned feature got
-dropped.
-
-Instances of class _Feature have two corresponding methods,
-.getOptionalRelease() and .getMandatoryRelease().
-
-CompilerFlag is the (bitfield) flag that should be passed in the fourth
-argument to the builtin function compile() to enable the feature in
-dynamically compiled code. This flag is stored in the .compiler_flag
-attribute on _Future instances. These values must match the appropriate
-#defines of CO_xxx flags in Include/compile.h.
-
-No feature line is ever to be deleted from this file.
-"""
-
-all_feature_names = [
- "nested_scopes",
- "generators",
- "division",
- "absolute_import",
- "with_statement",
- "print_function",
- "unicode_literals",
- "barry_as_FLUFL",
- "generator_stop",
-]
-
-__all__ = ["all_feature_names"] + all_feature_names
-
-# The CO_xxx symbols are defined here under the same names used by
-# compile.h, so that an editor search will find them here. However,
-# they're not exported in __all__, because they don't really belong to
-# this module.
-CO_NESTED = 0x0010 # nested_scopes
-CO_GENERATOR_ALLOWED = 0 # generators (obsolete, was 0x1000)
-CO_FUTURE_DIVISION = 0x2000 # division
-CO_FUTURE_ABSOLUTE_IMPORT = 0x4000 # perform absolute imports by default
-CO_FUTURE_WITH_STATEMENT = 0x8000 # with statement
-CO_FUTURE_PRINT_FUNCTION = 0x10000 # print function
-CO_FUTURE_UNICODE_LITERALS = 0x20000 # unicode string literals
-CO_FUTURE_BARRY_AS_BDFL = 0x40000
-CO_FUTURE_GENERATOR_STOP = 0x80000 # StopIteration becomes RuntimeError in generators
-
-class _Feature:
- def __init__(self, optionalRelease, mandatoryRelease, compiler_flag):
- self.optional = optionalRelease
- self.mandatory = mandatoryRelease
- self.compiler_flag = compiler_flag
-
- def getOptionalRelease(self):
- """Return first release in which this feature was recognized.
-
- This is a 5-tuple, of the same form as sys.version_info.
- """
-
- return self.optional
-
- def getMandatoryRelease(self):
- """Return release in which this feature will become mandatory.
-
- This is a 5-tuple, of the same form as sys.version_info, or, if
- the feature was dropped, is None.
- """
-
- return self.mandatory
-
- def __repr__(self):
- return "_Feature" + repr((self.optional,
- self.mandatory,
- self.compiler_flag))
-
-nested_scopes = _Feature((2, 1, 0, "beta", 1),
- (2, 2, 0, "alpha", 0),
- CO_NESTED)
-
-generators = _Feature((2, 2, 0, "alpha", 1),
- (2, 3, 0, "final", 0),
- CO_GENERATOR_ALLOWED)
-
-division = _Feature((2, 2, 0, "alpha", 2),
- (3, 0, 0, "alpha", 0),
- CO_FUTURE_DIVISION)
-
-absolute_import = _Feature((2, 5, 0, "alpha", 1),
- (3, 0, 0, "alpha", 0),
- CO_FUTURE_ABSOLUTE_IMPORT)
-
-with_statement = _Feature((2, 5, 0, "alpha", 1),
- (2, 6, 0, "alpha", 0),
- CO_FUTURE_WITH_STATEMENT)
-
-print_function = _Feature((2, 6, 0, "alpha", 2),
- (3, 0, 0, "alpha", 0),
- CO_FUTURE_PRINT_FUNCTION)
-
-unicode_literals = _Feature((2, 6, 0, "alpha", 2),
- (3, 0, 0, "alpha", 0),
- CO_FUTURE_UNICODE_LITERALS)
-
-barry_as_FLUFL = _Feature((3, 1, 0, "alpha", 2),
- (3, 9, 0, "alpha", 0),
- CO_FUTURE_BARRY_AS_BDFL)
-
-generator_stop = _Feature((3, 5, 0, "beta", 1),
- (3, 7, 0, "alpha", 0),
- CO_FUTURE_GENERATOR_STOP)
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