X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/0d1b957d400e2884ad312b4c113ee215effb8256..fda2561f79e10826dbdeb900b6124d642766229f:/src/black/mode.py?ds=sidebyside diff --git a/src/black/mode.py b/src/black/mode.py index e241753..6d45e3d 100644 --- a/src/black/mode.py +++ b/src/black/mode.py @@ -4,16 +4,24 @@ Mostly around Python language feature support per version and Black configuratio chosen by the user. """ +from hashlib import md5 +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 @@ -23,13 +31,8 @@ class TargetVersion(Enum): PY39 = 9 PY310 = 10 - def is_python2(self) -> bool: - return self is TargetVersion.PY27 - class Feature(Enum): - # All string literals are unicode - UNICODE_LITERALS = 1 F_STRINGS = 2 NUMERIC_UNDERSCORES = 3 TRAILING_COMMA_IN_CALL = 4 @@ -42,40 +45,24 @@ class Feature(Enum): 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 - AUTOMATIC_PARAMETER_UNPACKING = 202 - COMMA_STYLE_EXCEPT = 203 - COMMA_STYLE_RAISE = 204 - LONG_INT_LITERAL = 205 - OCTAL_INT_LITERAL = 206 - BACKQUOTE_REPR = 207 + # __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, - Feature.AUTOMATIC_PARAMETER_UNPACKING, - Feature.COMMA_STYLE_EXCEPT, - Feature.COMMA_STYLE_RAISE, - Feature.LONG_INT_LITERAL, - Feature.OCTAL_INT_LITERAL, - Feature.BACKQUOTE_REPR, - }, - 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, @@ -83,44 +70,50 @@ 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.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, Feature.PATTERN_MATCHING, }, } @@ -130,6 +123,17 @@ 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() + hug_simple_powers = auto() + + +class Deprecated(UserWarning): + """Visible deprecation warning.""" + + @dataclass class Mode: target_versions: Set[TargetVersion] = field(default_factory=set) @@ -139,6 +143,27 @@ 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: @@ -156,5 +181,7 @@ class Mode: str(int(self.is_ipynb)), str(int(self.magic_trailing_comma)), str(int(self.experimental_string_processing)), + str(int(self.preview)), + md5((",".join(sorted(self.python_cell_magics))).encode()).hexdigest(), ] return ".".join(parts)