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87 lines
2.6 KiB
87 lines
2.6 KiB
9 months ago
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u"""
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Warn about features that are not present in Python 2.5, giving a message that
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points to the earliest version of Python 2.x (or 3.x, if none) that supports it
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"""
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from .feature_base import Feature, Features
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from lib2to3 import fixer_base
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FEATURES = [
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#(FeatureName,
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# FeaturePattern,
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# FeatureMinVersion,
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#),
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(u"memoryview",
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u"power < 'memoryview' trailer < '(' any* ')' > any* >",
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u"2.7",
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),
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(u"numbers",
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u"""import_from< 'from' 'numbers' 'import' any* > |
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import_name< 'import' ('numbers' dotted_as_names< any* 'numbers' any* >) >""",
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u"2.6",
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),
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(u"abc",
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u"""import_name< 'import' ('abc' dotted_as_names< any* 'abc' any* >) > |
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import_from< 'from' 'abc' 'import' any* >""",
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u"2.6",
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),
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(u"io",
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u"""import_name< 'import' ('io' dotted_as_names< any* 'io' any* >) > |
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import_from< 'from' 'io' 'import' any* >""",
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u"2.6",
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),
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(u"bin",
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u"power< 'bin' trailer< '(' any* ')' > any* >",
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u"2.6",
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),
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(u"formatting",
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u"power< any trailer< '.' 'format' > trailer< '(' any* ')' > >",
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u"2.6",
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),
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(u"nonlocal",
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u"global_stmt< 'nonlocal' any* >",
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u"3.0",
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),
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(u"with_traceback",
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u"trailer< '.' 'with_traceback' >",
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u"3.0",
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),
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]
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class FixFeatures(fixer_base.BaseFix):
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run_order = 9 # Wait until all other fixers have run to check for these
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# To avoid spamming, we only want to warn for each feature once.
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features_warned = set()
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# Build features from the list above
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features = Features([Feature(name, pattern, version) for \
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name, pattern, version in FEATURES])
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PATTERN = features.PATTERN
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def match(self, node):
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to_ret = super(FixFeatures, self).match(node)
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# We want the mapping only to tell us the node's specific information.
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try:
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del to_ret[u'node']
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except Exception:
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# We want it to delete the 'node' from the results
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# if it's there, so we don't care if it fails for normal reasons.
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pass
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return to_ret
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def transform(self, node, results):
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for feature_name in results:
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if feature_name in self.features_warned:
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continue
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else:
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curr_feature = self.features[feature_name]
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if curr_feature.version >= u"3":
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fail = self.cannot_convert
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else:
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fail = self.warning
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fail(node, reason=curr_feature.message_text())
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self.features_warned.add(feature_name)
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