From 1648ac51806d092c95cb9bb2e4a5bffda6095bc1 Mon Sep 17 00:00:00 2001 From: Henri Holopainen Date: Mon, 16 Oct 2023 17:08:21 +0300 Subject: [PATCH] Fix long lines with power operator(s) getting splitted before line length (#3942) Fixes #3889 --- CHANGES.md | 1 + src/black/linegen.py | 21 ++++- src/black/mode.py | 1 + tests/data/cases/power_op_spacing.py | 18 ++++ tests/data/cases/preview_power_op_spacing.py | 97 ++++++++++++++++++++ 5 files changed, 137 insertions(+), 1 deletion(-) create mode 100644 tests/data/cases/preview_power_op_spacing.py diff --git a/CHANGES.md b/CHANGES.md index a608551..d1c4a07 100644 --- a/CHANGES.md +++ b/CHANGES.md @@ -16,6 +16,7 @@ +- Fix long lines with power operators getting splitted before the line length (#3942) - Long type hints are now wrapped in parentheses and properly indented when split across multiple lines (#3899) - Magic trailing commas are now respected in return types. (#3916) diff --git a/src/black/linegen.py b/src/black/linegen.py index faeb3ba..d12ca39 100644 --- a/src/black/linegen.py +++ b/src/black/linegen.py @@ -536,6 +536,17 @@ class LineGenerator(Visitor[Line]): self.visit_case_block = self.visit_match_case +def _hugging_power_ops_line_to_string( + line: Line, + features: Collection[Feature], + mode: Mode, +) -> Optional[str]: + try: + return line_to_string(next(hug_power_op(line, features, mode))) + except CannotTransform: + return None + + def transform_line( line: Line, mode: Mode, features: Collection[Feature] = () ) -> Iterator[Line]: @@ -551,6 +562,14 @@ def transform_line( line_str = line_to_string(line) + # We need the line string when power operators are hugging to determine if we should + # split the line. Default to line_str, if no power operator are present on the line. + line_str_hugging_power_ops = ( + (_hugging_power_ops_line_to_string(line, features, mode) or line_str) + if Preview.fix_power_op_line_length in mode + else line_str + ) + ll = mode.line_length sn = mode.string_normalization string_merge = StringMerger(ll, sn) @@ -564,7 +583,7 @@ def transform_line( and not line.should_split_rhs and not line.magic_trailing_comma and ( - is_line_short_enough(line, mode=mode, line_str=line_str) + is_line_short_enough(line, mode=mode, line_str=line_str_hugging_power_ops) or line.contains_unsplittable_type_ignore() ) and not (line.inside_brackets and line.contains_standalone_comments()) diff --git a/src/black/mode.py b/src/black/mode.py index baf886a..a57fa37 100644 --- a/src/black/mode.py +++ b/src/black/mode.py @@ -188,6 +188,7 @@ class Preview(Enum): dummy_implementations = auto() walrus_subscript = auto() module_docstring_newlines = auto() + fix_power_op_line_length = auto() class Deprecated(UserWarning): diff --git a/tests/data/cases/power_op_spacing.py b/tests/data/cases/power_op_spacing.py index c95fa78..b3ef0aa 100644 --- a/tests/data/cases/power_op_spacing.py +++ b/tests/data/cases/power_op_spacing.py @@ -29,6 +29,13 @@ o = settings(max_examples=10**6) p = {(k, k**2): v**2 for k, v in pairs} q = [10**i for i in range(6)] r = x**y +s = 1 ** 1 +t = ( + 1 + ** 1 + **1 + ** 1 +) a = 5.0**~4.0 b = 5.0 ** f() @@ -47,6 +54,13 @@ n = count <= 10**5.0 o = settings(max_examples=10**6.0) p = {(k, k**2): v**2.0 for k, v in pairs} q = [10.5**i for i in range(6)] +s = 1.0 ** 1.0 +t = ( + 1.0 + ** 1.0 + **1.0 + ** 1.0 +) # WE SHOULD DEFINITELY NOT EAT THESE COMMENTS (https://github.com/psf/black/issues/2873) @@ -97,6 +111,8 @@ o = settings(max_examples=10**6) p = {(k, k**2): v**2 for k, v in pairs} q = [10**i for i in range(6)] r = x**y +s = 1**1 +t = 1**1**1**1 a = 5.0**~4.0 b = 5.0 ** f() @@ -115,6 +131,8 @@ n = count <= 10**5.0 o = settings(max_examples=10**6.0) p = {(k, k**2): v**2.0 for k, v in pairs} q = [10.5**i for i in range(6)] +s = 1.0**1.0 +t = 1.0**1.0**1.0**1.0 # WE SHOULD DEFINITELY NOT EAT THESE COMMENTS (https://github.com/psf/black/issues/2873) diff --git a/tests/data/cases/preview_power_op_spacing.py b/tests/data/cases/preview_power_op_spacing.py new file mode 100644 index 0000000..650c6fe --- /dev/null +++ b/tests/data/cases/preview_power_op_spacing.py @@ -0,0 +1,97 @@ +# flags: --preview +a = 1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1 +b = 1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1 +c = 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 ** 1 +d = 1**1 ** 1**1 ** 1**1 ** 1**1 ** 1**1**1 ** 1 ** 1**1 ** 1**1**1**1**1 ** 1 ** 1**1**1 **1**1** 1 ** 1 ** 1 +e = 𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟 +f = 𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟 + +a = 1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0 +b = 1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0 +c = 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 ** 1.0 +d = 1.0**1.0 ** 1.0**1.0 ** 1.0**1.0 ** 1.0**1.0 ** 1.0**1.0**1.0 ** 1.0 ** 1.0**1.0 ** 1.0**1.0**1.0 + +# output +a = 1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1 +b = ( + 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 + ** 1 +) +c = 1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1 +d = 1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1 +e = 𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟**𨉟 +f = ( + 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 + ** 𨉟 +) + +a = 1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0 +b = ( + 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 + ** 1.0 +) +c = 1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0 +d = 1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0**1.0 -- 2.39.2