X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/b21c0c3d28d87bc944a1fdc979b30a0707b0df89..911b59fb4f39a612f0c9e5350b78d7b37f5ed491:/src/black/mode.py?ds=sidebyside diff --git a/src/black/mode.py b/src/black/mode.py index 374c47a..3490570 100644 --- a/src/black/mode.py +++ b/src/black/mode.py @@ -4,15 +4,24 @@ Mostly around Python language feature support per version and Black configuratio chosen by the user. """ +from hashlib import sha256 +import sys + from dataclasses import dataclass, field -from enum import Enum +from enum import Enum, auto +from operator import attrgetter from typing import Dict, Set +from warnings import warn + +if sys.version_info < (3, 8): + from typing_extensions import Final +else: + from typing import Final from black.const import DEFAULT_LINE_LENGTH class TargetVersion(Enum): - PY27 = 2 PY33 = 3 PY34 = 4 PY35 = 5 @@ -20,14 +29,10 @@ class TargetVersion(Enum): PY37 = 7 PY38 = 8 PY39 = 9 - - def is_python2(self) -> bool: - return self is TargetVersion.PY27 + PY310 = 10 class Feature(Enum): - # All string literals are unicode - UNICODE_LITERALS = 1 F_STRINGS = 2 NUMERIC_UNDERSCORES = 3 TRAILING_COMMA_IN_CALL = 4 @@ -39,28 +44,25 @@ class Feature(Enum): ASSIGNMENT_EXPRESSIONS = 8 POS_ONLY_ARGUMENTS = 9 RELAXED_DECORATORS = 10 + PATTERN_MATCHING = 11 + UNPACKING_ON_FLOW = 12 + ANN_ASSIGN_EXTENDED_RHS = 13 FORCE_OPTIONAL_PARENTHESES = 50 - # temporary for Python 2 deprecation - PRINT_STMT = 200 - EXEC_STMT = 201 + # __future__ flags + FUTURE_ANNOTATIONS = 51 + + +FUTURE_FLAG_TO_FEATURE: Final = { + "annotations": Feature.FUTURE_ANNOTATIONS, +} VERSION_TO_FEATURES: Dict[TargetVersion, Set[Feature]] = { - TargetVersion.PY27: { - Feature.ASYNC_IDENTIFIERS, - Feature.PRINT_STMT, - Feature.EXEC_STMT, - }, - TargetVersion.PY33: {Feature.UNICODE_LITERALS, Feature.ASYNC_IDENTIFIERS}, - TargetVersion.PY34: {Feature.UNICODE_LITERALS, Feature.ASYNC_IDENTIFIERS}, - TargetVersion.PY35: { - Feature.UNICODE_LITERALS, - Feature.TRAILING_COMMA_IN_CALL, - Feature.ASYNC_IDENTIFIERS, - }, + TargetVersion.PY33: {Feature.ASYNC_IDENTIFIERS}, + TargetVersion.PY34: {Feature.ASYNC_IDENTIFIERS}, + TargetVersion.PY35: {Feature.TRAILING_COMMA_IN_CALL, Feature.ASYNC_IDENTIFIERS}, TargetVersion.PY36: { - Feature.UNICODE_LITERALS, Feature.F_STRINGS, Feature.NUMERIC_UNDERSCORES, Feature.TRAILING_COMMA_IN_CALL, @@ -68,33 +70,51 @@ VERSION_TO_FEATURES: Dict[TargetVersion, Set[Feature]] = { Feature.ASYNC_IDENTIFIERS, }, TargetVersion.PY37: { - Feature.UNICODE_LITERALS, Feature.F_STRINGS, Feature.NUMERIC_UNDERSCORES, Feature.TRAILING_COMMA_IN_CALL, Feature.TRAILING_COMMA_IN_DEF, Feature.ASYNC_KEYWORDS, + Feature.FUTURE_ANNOTATIONS, }, TargetVersion.PY38: { - Feature.UNICODE_LITERALS, Feature.F_STRINGS, Feature.NUMERIC_UNDERSCORES, Feature.TRAILING_COMMA_IN_CALL, Feature.TRAILING_COMMA_IN_DEF, Feature.ASYNC_KEYWORDS, + Feature.FUTURE_ANNOTATIONS, Feature.ASSIGNMENT_EXPRESSIONS, Feature.POS_ONLY_ARGUMENTS, + Feature.UNPACKING_ON_FLOW, + Feature.ANN_ASSIGN_EXTENDED_RHS, }, TargetVersion.PY39: { - Feature.UNICODE_LITERALS, Feature.F_STRINGS, Feature.NUMERIC_UNDERSCORES, Feature.TRAILING_COMMA_IN_CALL, Feature.TRAILING_COMMA_IN_DEF, Feature.ASYNC_KEYWORDS, + Feature.FUTURE_ANNOTATIONS, + Feature.ASSIGNMENT_EXPRESSIONS, + Feature.RELAXED_DECORATORS, + Feature.POS_ONLY_ARGUMENTS, + Feature.UNPACKING_ON_FLOW, + Feature.ANN_ASSIGN_EXTENDED_RHS, + }, + TargetVersion.PY310: { + Feature.F_STRINGS, + Feature.NUMERIC_UNDERSCORES, + Feature.TRAILING_COMMA_IN_CALL, + Feature.TRAILING_COMMA_IN_DEF, + Feature.ASYNC_KEYWORDS, + Feature.FUTURE_ANNOTATIONS, Feature.ASSIGNMENT_EXPRESSIONS, Feature.RELAXED_DECORATORS, Feature.POS_ONLY_ARGUMENTS, + Feature.UNPACKING_ON_FLOW, + Feature.ANN_ASSIGN_EXTENDED_RHS, + Feature.PATTERN_MATCHING, }, } @@ -103,6 +123,19 @@ def supports_feature(target_versions: Set[TargetVersion], feature: Feature) -> b return all(feature in VERSION_TO_FEATURES[version] for version in target_versions) +class Preview(Enum): + """Individual preview style features.""" + + string_processing = auto() + remove_redundant_parens = auto() + one_element_subscript = auto() + annotation_parens = auto() + + +class Deprecated(UserWarning): + """Visible deprecation warning.""" + + @dataclass class Mode: target_versions: Set[TargetVersion] = field(default_factory=set) @@ -112,12 +145,33 @@ class Mode: is_ipynb: bool = False magic_trailing_comma: bool = True experimental_string_processing: bool = False + python_cell_magics: Set[str] = field(default_factory=set) + preview: bool = False + + def __post_init__(self) -> None: + if self.experimental_string_processing: + warn( + "`experimental string processing` has been included in `preview`" + " and deprecated. Use `preview` instead.", + Deprecated, + ) + + def __contains__(self, feature: Preview) -> bool: + """ + Provide `Preview.FEATURE in Mode` syntax that mirrors the ``preview`` flag. + + The argument is not checked and features are not differentiated. + They only exist to make development easier by clarifying intent. + """ + if feature is Preview.string_processing: + return self.preview or self.experimental_string_processing + return self.preview def get_cache_key(self) -> str: if self.target_versions: version_str = ",".join( str(version.value) - for version in sorted(self.target_versions, key=lambda v: v.value) + for version in sorted(self.target_versions, key=attrgetter("value")) ) else: version_str = "-" @@ -129,5 +183,7 @@ class Mode: str(int(self.is_ipynb)), str(int(self.magic_trailing_comma)), str(int(self.experimental_string_processing)), + str(int(self.preview)), + sha256((",".join(sorted(self.python_cell_magics))).encode()).hexdigest(), ] return ".".join(parts)