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Improve dummy_implementations preview style formatting (#9240)

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Micha Reiser 2023-12-22 12:44:14 +09:00 • committed by GitHub
parent a06723da2b
commit 9cc257ee7d
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6 changed files with 159 additions and 294 deletions
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34
crates/ruff_python_formatter/src/statement/suite.rs
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@ -12,7 +12,8 @@ use crate::context::{NodeLevel, TopLevelStatementPosition, WithIndentLevel, With
use crate::expression::expr_string_literal::ExprStringLiteralKind;
use crate::prelude::*;
use crate::preview::{
is_module_docstring_newlines_enabled, is_no_blank_line_before_class_docstring_enabled,
is_dummy_implementations_enabled, is_module_docstring_newlines_enabled,
is_no_blank_line_before_class_docstring_enabled,
};
use crate::statement::stmt_expr::FormatStmtExpr;
use crate::verbatim::{
@ -261,12 +262,31 @@ impl FormatRule<Suite, PyFormatContext<'_>> for FormatSuite {
f,
)?;
} else {
match self.kind {
SuiteKind::TopLevel => {
write!(f, [empty_line(), empty_line()])?;
}
SuiteKind::Function | SuiteKind::Class | SuiteKind::Other => {
empty_line().fmt(f)?;
// Preserve empty lines after a stub implementation but don't insert a new one if there isn't any present in the source.
// This is useful when having multiple function overloads that should be grouped to getter by omitting new lines between them.
let is_preceding_stub_function_without_empty_line =
is_dummy_implementations_enabled(f.context())
&& following.is_function_def_stmt()
&& preceding
.as_function_def_stmt()
.is_some_and(|preceding_stub| {
contains_only_an_ellipsis(
&preceding_stub.body,
f.context().comments(),
) && lines_after_ignoring_end_of_line_trivia(
preceding_stub.end(),
f.context().source(),
) < 2
});
if !is_preceding_stub_function_without_empty_line {
match self.kind {
SuiteKind::TopLevel => {
write!(f, [empty_line(), empty_line()])?;
}
SuiteKind::Function | SuiteKind::Class | SuiteKind::Other => {
empty_line().fmt(f)?;
}
}
}
}