X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/7c94ed61a55f8ae0c60737cbc6cfee3b5066ce11..f87df0e3c8735de416b6392ce7f21c6ba194424d:/src/black/linegen.py diff --git a/src/black/linegen.py b/src/black/linegen.py index c1cd6fa..79475a8 100644 --- a/src/black/linegen.py +++ b/src/black/linegen.py @@ -7,7 +7,7 @@ from typing import Collection, Iterator, List, Optional, Set, Union from black.nodes import WHITESPACE, RARROW, STATEMENT, STANDALONE_COMMENT from black.nodes import ASSIGNMENTS, OPENING_BRACKETS, CLOSING_BRACKETS -from black.nodes import Visitor, syms, first_child_is_arith, ensure_visible +from black.nodes import Visitor, syms, is_arith_like, ensure_visible from black.nodes import is_docstring, is_empty_tuple, is_one_tuple, is_one_tuple_between from black.nodes import is_name_token, is_lpar_token, is_rpar_token from black.nodes import is_walrus_assignment, is_yield, is_vararg, is_multiline_string @@ -21,10 +21,9 @@ from black.comments import generate_comments, list_comments, FMT_OFF from black.numerics import normalize_numeric_literal from black.strings import get_string_prefix, fix_docstring from black.strings import normalize_string_prefix, normalize_string_quotes -from black.trans import Transformer, CannotTransform, StringMerger -from black.trans import StringSplitter, StringParenWrapper, StringParenStripper -from black.mode import Mode -from black.mode import Feature +from black.trans import Transformer, CannotTransform, StringMerger, StringSplitter +from black.trans import StringParenWrapper, StringParenStripper, hug_power_op +from black.mode import Mode, Feature, Preview from blib2to3.pytree import Node, Leaf from blib2to3.pgen2 import token @@ -48,9 +47,8 @@ class LineGenerator(Visitor[Line]): in ways that will no longer stringify to valid Python code on the tree. """ - def __init__(self, mode: Mode, remove_u_prefix: bool = False) -> None: + def __init__(self, mode: Mode) -> None: self.mode = mode - self.remove_u_prefix = remove_u_prefix self.current_line: Line self.__post_init__() @@ -74,7 +72,7 @@ class LineGenerator(Visitor[Line]): """Default `visit_*()` implementation. Recurses to children of `node`.""" if isinstance(node, Leaf): any_open_brackets = self.current_line.bracket_tracker.any_open_brackets() - for comment in generate_comments(node): + for comment in generate_comments(node, preview=self.mode.preview): if any_open_brackets: # any comment within brackets is subject to splitting self.current_line.append(comment) @@ -92,9 +90,7 @@ class LineGenerator(Visitor[Line]): normalize_prefix(node, inside_brackets=any_open_brackets) if self.mode.string_normalization and node.type == token.STRING: - node.value = normalize_string_prefix( - node.value, remove_u_prefix=self.remove_u_prefix - ) + node.value = normalize_string_prefix(node.value) node.value = normalize_string_quotes(node.value) if node.type == token.NUMBER: normalize_numeric_literal(node) @@ -136,7 +132,7 @@ class LineGenerator(Visitor[Line]): `parens` holds a set of string leaf values immediately after which invisible parens should be put. """ - normalize_invisible_parens(node, parens_after=parens) + normalize_invisible_parens(node, parens_after=parens, preview=self.mode.preview) for child in node.children: if is_name_token(child) and child.value in keywords: yield from self.line() @@ -145,7 +141,7 @@ class LineGenerator(Visitor[Line]): def visit_match_case(self, node: Node) -> Iterator[Line]: """Visit either a match or case statement.""" - normalize_invisible_parens(node, parens_after=set()) + normalize_invisible_parens(node, parens_after=set(), preview=self.mode.preview) yield from self.line() for child in node.children: @@ -160,8 +156,12 @@ class LineGenerator(Visitor[Line]): def visit_simple_stmt(self, node: Node) -> Iterator[Line]: """Visit a statement without nested statements.""" - if first_child_is_arith(node): - wrap_in_parentheses(node, node.children[0], visible=False) + prev_type: Optional[int] = None + for child in node.children: + if (prev_type is None or prev_type == token.SEMI) and is_arith_like(child): + wrap_in_parentheses(node, child, visible=False) + prev_type = child.type + is_suite_like = node.parent and node.parent.type in STATEMENT if is_suite_like: if self.mode.is_pyi and is_stub_body(node): @@ -201,6 +201,28 @@ class LineGenerator(Visitor[Line]): yield from self.line() yield from self.visit(child) + def visit_power(self, node: Node) -> Iterator[Line]: + for idx, leaf in enumerate(node.children[:-1]): + next_leaf = node.children[idx + 1] + + if not isinstance(leaf, Leaf): + continue + + value = leaf.value.lower() + if ( + leaf.type == token.NUMBER + and next_leaf.type == syms.trailer + # Ensure that we are in an attribute trailer + and next_leaf.children[0].type == token.DOT + # It shouldn't wrap hexadecimal, binary and octal literals + and not value.startswith(("0x", "0b", "0o")) + # It shouldn't wrap complex literals + and "j" not in value + ): + wrap_in_parentheses(node, leaf) + + yield from self.visit_default(node) + def visit_SEMI(self, leaf: Leaf) -> Iterator[Line]: """Remove a semicolon and put the other statement on a separate line.""" yield from self.line() @@ -236,7 +258,7 @@ class LineGenerator(Visitor[Line]): if is_docstring(leaf) and "\\\n" not in leaf.value: # We're ignoring docstrings with backslash newline escapes because changing # indentation of those changes the AST representation of the code. - docstring = normalize_string_prefix(leaf.value, self.remove_u_prefix) + docstring = normalize_string_prefix(leaf.value) prefix = get_string_prefix(docstring) docstring = docstring[len(prefix) :] # Remove the prefix quote_char = docstring[0] @@ -341,7 +363,7 @@ def transform_line( and not (line.inside_brackets and line.contains_standalone_comments()) ): # Only apply basic string preprocessing, since lines shouldn't be split here. - if mode.experimental_string_processing: + if Preview.string_processing in mode: transformers = [string_merge, string_paren_strip] else: transformers = [] @@ -384,7 +406,7 @@ def transform_line( # via type ... https://github.com/mypyc/mypyc/issues/884 rhs = type("rhs", (), {"__call__": _rhs})() - if mode.experimental_string_processing: + if Preview.string_processing in mode: if line.inside_brackets: transformers = [ string_merge, @@ -408,6 +430,9 @@ def transform_line( transformers = [delimiter_split, standalone_comment_split, rhs] else: transformers = [rhs] + # It's always safe to attempt hugging of power operations and pretty much every line + # could match. + transformers.append(hug_power_op) for transform in transformers: # We are accumulating lines in `result` because we might want to abort @@ -518,7 +543,7 @@ def right_hand_split( # there are no standalone comments in the body and not body.contains_standalone_comments(0) # and we can actually remove the parens - and can_omit_invisible_parens(body, line_length, omit_on_explode=omit) + and can_omit_invisible_parens(body, line_length) ): omit = {id(closing_bracket), *omit} try: @@ -777,7 +802,9 @@ def normalize_prefix(leaf: Leaf, *, inside_brackets: bool) -> None: leaf.prefix = "" -def normalize_invisible_parens(node: Node, parens_after: Set[str]) -> None: +def normalize_invisible_parens( + node: Node, parens_after: Set[str], *, preview: bool +) -> None: """Make existing optional parentheses invisible or create new ones. `parens_after` is a set of string leaf values immediately after which parens @@ -786,7 +813,7 @@ def normalize_invisible_parens(node: Node, parens_after: Set[str]) -> None: Standardizes on visible parentheses for single-element tuples, and keeps existing visible parentheses for other tuples and generator expressions. """ - for pc in list_comments(node.prefix, is_endmarker=False): + for pc in list_comments(node.prefix, is_endmarker=False, preview=preview): if pc.value in FMT_OFF: # This `node` has a prefix with `# fmt: off`, don't mess with parens. return @@ -795,7 +822,9 @@ def normalize_invisible_parens(node: Node, parens_after: Set[str]) -> None: # Fixes a bug where invisible parens are not properly stripped from # assignment statements that contain type annotations. if isinstance(child, Node) and child.type == syms.annassign: - normalize_invisible_parens(child, parens_after=parens_after) + normalize_invisible_parens( + child, parens_after=parens_after, preview=preview + ) # Add parentheses around long tuple unpacking in assignments. if ( @@ -815,9 +844,10 @@ def normalize_invisible_parens(node: Node, parens_after: Set[str]) -> None: # "import from" nodes store parentheses directly as part of # the statement if is_lpar_token(child): + assert is_rpar_token(node.children[-1]) # make parentheses invisible child.value = "" - node.children[-1].value = "" # type: ignore + node.children[-1].value = "" elif child.type != token.STAR: # insert invisible parentheses node.insert_child(index, Leaf(token.LPAR, "")) @@ -942,6 +972,7 @@ def generate_trailers_to_omit(line: Line, line_length: int) -> Iterator[Set[Leaf if ( prev and prev.type == token.COMMA + and leaf.opening_bracket is not None and not is_one_tuple_between( leaf.opening_bracket, leaf, line.leaves ) @@ -969,6 +1000,7 @@ def generate_trailers_to_omit(line: Line, line_length: int) -> Iterator[Set[Leaf if ( prev and prev.type == token.COMMA + and leaf.opening_bracket is not None and not is_one_tuple_between(leaf.opening_bracket, leaf, line.leaves) ): # Never omit bracket pairs with trailing commas.