X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/e712e48e06420d9240ce95c81acfcf6f11d14c83..0b301f80954a026693c4c22de89267ad8c85f9b6:/src/black/trans.py diff --git a/src/black/trans.py b/src/black/trans.py index 1e28ed0..daed264 100644 --- a/src/black/trans.py +++ b/src/black/trans.py @@ -2,7 +2,6 @@ String transformers that can split and merge strings. """ import re -import sys from abc import ABC, abstractmethod from collections import defaultdict from dataclasses import dataclass @@ -12,9 +11,11 @@ from typing import ( ClassVar, Collection, Dict, + Final, Iterable, Iterator, List, + Literal, Optional, Sequence, Set, @@ -23,11 +24,6 @@ from typing import ( Union, ) -if sys.version_info < (3, 8): - from typing_extensions import Final, Literal -else: - from typing import Literal, Final - from mypy_extensions import trait from black.comments import contains_pragma_comment @@ -205,11 +201,11 @@ class StringTransformer(ABC): """ Returns: * Ok(string_indices) such that for each index, `line.leaves[index]` - is our target string if a match was able to be made. For - transformers that don't result in more lines (e.g. StringMerger, - StringParenStripper), multiple matches and transforms are done at - once to reduce the complexity. - OR + is our target string if a match was able to be made. For + transformers that don't result in more lines (e.g. StringMerger, + StringParenStripper), multiple matches and transforms are done at + once to reduce the complexity. + OR * Err(CannotTransform), if no match could be made. """ @@ -220,12 +216,12 @@ class StringTransformer(ABC): """ Yields: * Ok(new_line) where new_line is the new transformed line. - OR + OR * Err(CannotTransform) if the transformation failed for some reason. The - `do_match(...)` template method should usually be used to reject - the form of the given Line, but in some cases it is difficult to - know whether or not a Line meets the StringTransformer's - requirements until the transformation is already midway. + `do_match(...)` template method should usually be used to reject + the form of the given Line, but in some cases it is difficult to + know whether or not a Line meets the StringTransformer's + requirements until the transformation is already midway. Side Effects: This method should NOT mutate @line directly, but it MAY mutate the @@ -335,8 +331,8 @@ class CustomSplitMapMixin: Returns: * A list of the custom splits that are mapped to @string, if any - exist. - OR + exist. + OR * [], otherwise. Side Effects: @@ -365,14 +361,14 @@ class StringMerger(StringTransformer, CustomSplitMapMixin): Requirements: (A) The line contains adjacent strings such that ALL of the validation checks listed in StringMerger._validate_msg(...)'s docstring pass. - OR + OR (B) The line contains a string which uses line continuation backslashes. Transformations: Depending on which of the two requirements above where met, either: (A) The string group associated with the target string is merged. - OR + OR (B) All line-continuation backslashes are removed from the target string. Collaborations: @@ -965,17 +961,20 @@ class BaseStringSplitter(StringTransformer): Requirements: * The target string value is responsible for the line going over the - line length limit. It follows that after all of black's other line - split methods have been exhausted, this line (or one of the resulting - lines after all line splits are performed) would still be over the - line_length limit unless we split this string. - AND + line length limit. It follows that after all of black's other line + split methods have been exhausted, this line (or one of the resulting + lines after all line splits are performed) would still be over the + line_length limit unless we split this string. + AND + * The target string is NOT a "pointless" string (i.e. a string that has - no parent or siblings). - AND + no parent or siblings). + AND + * The target string is not followed by an inline comment that appears - to be a pragma. - AND + to be a pragma. + AND + * The target string is not a multiline (i.e. triple-quote) string. """ @@ -1027,7 +1026,7 @@ class BaseStringSplitter(StringTransformer): Returns: * Ok(None), if ALL of the requirements are met. - OR + OR * Err(CannotTransform), if ANY of the requirements are NOT met. """ LL = line.leaves @@ -1299,9 +1298,9 @@ class StringSplitter(BaseStringSplitter, CustomSplitMapMixin): Requirements: * The line consists ONLY of a single string (possibly prefixed by a - string operator [e.g. '+' or '==']), MAYBE a string trailer, and MAYBE - a trailing comma. - AND + string operator [e.g. '+' or '==']), MAYBE a string trailer, and MAYBE + a trailing comma. + AND * All of the requirements listed in BaseStringSplitter's docstring. Transformations: @@ -1808,26 +1807,26 @@ class StringParenWrapper(BaseStringSplitter, CustomSplitMapMixin): addition to the requirements listed below: * The line is a return/yield statement, which returns/yields a string. - OR + OR * The line is part of a ternary expression (e.g. `x = y if cond else - z`) such that the line starts with `else `, where is - some string. - OR + z`) such that the line starts with `else `, where is + some string. + OR * The line is an assert statement, which ends with a string. - OR + OR * The line is an assignment statement (e.g. `x = ` or `x += - `) such that the variable is being assigned the value of some - string. - OR + `) such that the variable is being assigned the value of some + string. + OR * The line is a dictionary key assignment where some valid key is being - assigned the value of some string. - OR + assigned the value of some string. + OR * The line is an lambda expression and the value is a string. - OR + OR * The line starts with an "atom" string that prefers to be wrapped in - parens. It's preferred to be wrapped when it's is an immediate child of - a list/set/tuple literal, AND the string is surrounded by commas (or is - the first/last child). + parens. It's preferred to be wrapped when it's is an immediate child of + a list/set/tuple literal, AND the string is surrounded by commas (or is + the first/last child). Transformations: The chosen string is wrapped in parentheses and then split at the LPAR. @@ -2273,7 +2272,7 @@ class StringParser: Returns: The index directly after the last leaf which is apart of the string trailer, if a "trailer" exists. - OR + OR @string_idx + 1, if no string "trailer" exists. """ assert leaves[string_idx].type == token.STRING @@ -2287,11 +2286,11 @@ class StringParser: """ Pre-conditions: * On the first call to this function, @leaf MUST be the leaf that - was directly after the string leaf in question (e.g. if our target - string is `line.leaves[i]` then the first call to this method must - be `line.leaves[i + 1]`). + was directly after the string leaf in question (e.g. if our target + string is `line.leaves[i]` then the first call to this method must + be `line.leaves[i + 1]`). * On the next call to this function, the leaf parameter passed in - MUST be the leaf directly following @leaf. + MUST be the leaf directly following @leaf. Returns: True iff @leaf is apart of the string's trailer.