X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/24c708eb374a856372284fb1a4f021fec292f713..6debce63bc2429b1680f8838592f2e56e3df6b27:/src/black/linegen.py diff --git a/src/black/linegen.py b/src/black/linegen.py index 2cf9cf3..ff54e05 100644 --- a/src/black/linegen.py +++ b/src/black/linegen.py @@ -3,7 +3,7 @@ Generating lines of code. """ from functools import partial, wraps import sys -from typing import Collection, Iterator, List, Optional, Set, Union +from typing import Collection, Iterator, List, Optional, Set, Union, cast from black.nodes import WHITESPACE, RARROW, STATEMENT, STANDALONE_COMMENT from black.nodes import ASSIGNMENTS, OPENING_BRACKETS, CLOSING_BRACKETS @@ -144,6 +144,33 @@ class LineGenerator(Visitor[Line]): yield from self.visit(child) + def visit_funcdef(self, node: Node) -> Iterator[Line]: + """Visit function definition.""" + if Preview.annotation_parens not in self.mode: + yield from self.visit_stmt(node, keywords={"def"}, parens=set()) + else: + yield from self.line() + + # Remove redundant brackets around return type annotation. + is_return_annotation = False + for child in node.children: + if child.type == token.RARROW: + is_return_annotation = True + elif is_return_annotation: + if child.type == syms.atom and child.children[0].type == token.LPAR: + if maybe_make_parens_invisible_in_atom( + child, + parent=node, + remove_brackets_around_comma=False, + ): + wrap_in_parentheses(node, child, visible=False) + else: + wrap_in_parentheses(node, child, visible=False) + is_return_annotation = False + + for child in node.children: + yield from self.visit(child) + def visit_match_case(self, node: Node) -> Iterator[Line]: """Visit either a match or case statement.""" normalize_invisible_parens(node, parens_after=set(), preview=self.mode.preview) @@ -226,6 +253,9 @@ class LineGenerator(Visitor[Line]): ): wrap_in_parentheses(node, leaf) + if Preview.remove_redundant_parens in self.mode: + remove_await_parens(node) + yield from self.visit_default(node) def visit_SEMI(self, leaf: Leaf) -> Iterator[Line]: @@ -275,9 +305,9 @@ class LineGenerator(Visitor[Line]): quote_len = 1 if docstring[1] != quote_char else 3 docstring = docstring[quote_len:-quote_len] docstring_started_empty = not docstring + indent = " " * 4 * self.current_line.depth if is_multiline_string(leaf): - indent = " " * 4 * self.current_line.depth docstring = fix_docstring(docstring, indent) else: docstring = docstring.strip() @@ -299,7 +329,29 @@ class LineGenerator(Visitor[Line]): # We could enforce triple quotes at this point. quote = quote_char * quote_len - leaf.value = prefix + quote + docstring + quote + + if Preview.long_docstring_quotes_on_newline in self.mode: + # We need to find the length of the last line of the docstring + # to find if we can add the closing quotes to the line without + # exceeding the maximum line length. + # If docstring is one line, then we need to add the length + # of the indent, prefix, and starting quotes. Ending quote are + # handled later + lines = docstring.splitlines() + last_line_length = len(lines[-1]) if docstring else 0 + + if len(lines) == 1: + last_line_length += len(indent) + len(prefix) + quote_len + + # If adding closing quotes would cause the last line to exceed + # the maximum line length then put a line break before the + # closing quotes + if last_line_length + quote_len > self.mode.line_length: + leaf.value = prefix + quote + docstring + "\n" + indent + quote + else: + leaf.value = prefix + quote + docstring + quote + else: + leaf.value = prefix + quote + docstring + quote yield from self.visit_default(leaf) @@ -326,7 +378,6 @@ class LineGenerator(Visitor[Line]): else: self.visit_except_clause = partial(v, keywords={"except"}, parens=Ø) self.visit_with_stmt = partial(v, keywords={"with"}, parens=Ø) - self.visit_funcdef = partial(v, keywords={"def"}, parens=Ø) self.visit_classdef = partial(v, keywords={"class"}, parens=Ø) self.visit_expr_stmt = partial(v, keywords=Ø, parens=ASSIGNMENTS) self.visit_return_stmt = partial(v, keywords={"return"}, parens={"return"}) @@ -478,7 +529,10 @@ def left_hand_split(line: Line, _features: Collection[Feature] = ()) -> Iterator current_leaves is body_leaves and leaf.type in CLOSING_BRACKETS and leaf.opening_bracket is matching_bracket + and isinstance(matching_bracket, Leaf) ): + ensure_visible(leaf) + ensure_visible(matching_bracket) current_leaves = tail_leaves if body_leaves else head_leaves current_leaves.append(leaf) if current_leaves is head_leaves: @@ -883,6 +937,15 @@ def normalize_invisible_parens( node.insert_child(index, Leaf(token.LPAR, "")) node.append_child(Leaf(token.RPAR, "")) break + elif ( + index == 1 + and child.type == token.STAR + and node.type == syms.except_clause + ): + # In except* (PEP 654), the star is actually part of + # of the keyword. So we need to skip the insertion of + # invisible parentheses to work more precisely. + continue elif not (isinstance(child, Leaf) and is_multiline_string(child)): wrap_in_parentheses(node, child, visible=False) @@ -894,6 +957,42 @@ def normalize_invisible_parens( ) +def remove_await_parens(node: Node) -> None: + if node.children[0].type == token.AWAIT and len(node.children) > 1: + if ( + node.children[1].type == syms.atom + and node.children[1].children[0].type == token.LPAR + ): + if maybe_make_parens_invisible_in_atom( + node.children[1], + parent=node, + remove_brackets_around_comma=True, + ): + wrap_in_parentheses(node, node.children[1], visible=False) + + # Since await is an expression we shouldn't remove + # brackets in cases where this would change + # the AST due to operator precedence. + # Therefore we only aim to remove brackets around + # power nodes that aren't also await expressions themselves. + # https://peps.python.org/pep-0492/#updated-operator-precedence-table + # N.B. We've still removed any redundant nested brackets though :) + opening_bracket = cast(Leaf, node.children[1].children[0]) + closing_bracket = cast(Leaf, node.children[1].children[-1]) + bracket_contents = cast(Node, node.children[1].children[1]) + if bracket_contents.type != syms.power: + ensure_visible(opening_bracket) + ensure_visible(closing_bracket) + elif ( + bracket_contents.type == syms.power + and bracket_contents.children[0].type == token.AWAIT + ): + ensure_visible(opening_bracket) + ensure_visible(closing_bracket) + # If we are in a nested await then recurse down. + remove_await_parens(bracket_contents) + + def remove_with_parens(node: Node, parent: Node) -> None: """Recursively hide optional parens in `with` statements.""" # Removing all unnecessary parentheses in with statements in one pass is a tad