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Format function and class definitions into a single line if its body is an ellipsis (#6592)

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Tom Kuson 2023-08-21 08:02:23 +01:00 • committed by GitHub
parent bb5fbb1b5c
commit 2a8d24dd4b
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GPG key ID: 4AEE18F83AFDEB23
15 changed files with 445 additions and 60 deletions
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4
crates/ruff_python_formatter/src/other/except_handler_except_handler.rs
View file

@ -6,7 +6,7 @@ use crate::comments::SourceComment;
use crate::expression::maybe_parenthesize_expression;
use crate::expression::parentheses::Parenthesize;
use crate::prelude::*;
use crate::statement::clause::{clause_header, ClauseHeader};
use crate::statement::clause::{clause_body, clause_header, ClauseHeader};
use crate::{FormatNodeRule, PyFormatter};
#[derive(Copy, Clone, Default)]
@ -86,7 +86,7 @@ impl FormatNodeRule<ExceptHandlerExceptHandler> for FormatExceptHandlerExceptHan
Ok(())
}),
),
block_indent(&body.format())
clause_body(body, dangling_comments),
]
)
}

4
crates/ruff_python_formatter/src/other/match_case.rs
View file

@ -6,7 +6,7 @@ use ruff_text_size::TextRange;
use crate::comments::{leading_comments, SourceComment};
use crate::expression::parentheses::parenthesized;
use crate::prelude::*;
use crate::statement::clause::{clause_header, ClauseHeader};
use crate::statement::clause::{clause_body, clause_header, ClauseHeader};
use crate::{FormatError, FormatNodeRule, PyFormatter};
#[derive(Default)]
@ -57,7 +57,7 @@ impl FormatNodeRule<MatchCase> for FormatMatchCase {
Ok(())
}),
),
block_indent(&body.format())
clause_body(body, dangling_item_comments),
]
)
}

56
crates/ruff_python_formatter/src/statement/clause.rs
View file

@ -2,12 +2,13 @@ use crate::comments::{
leading_alternate_branch_comments, trailing_comments, SourceComment, SuppressionKind,
};
use crate::prelude::*;
use crate::statement::suite::{contains_only_an_ellipsis, SuiteKind};
use crate::verbatim::write_suppressed_clause_header;
use ruff_formatter::{Argument, Arguments, FormatError};
use ruff_formatter::{write, Argument, Arguments, FormatError};
use ruff_python_ast::node::AnyNodeRef;
use ruff_python_ast::{
ElifElseClause, ExceptHandlerExceptHandler, MatchCase, Ranged, StmtClassDef, StmtFor,
StmtFunctionDef, StmtIf, StmtMatch, StmtTry, StmtWhile, StmtWith,
StmtFunctionDef, StmtIf, StmtMatch, StmtTry, StmtWhile, StmtWith, Suite,
};
use ruff_python_trivia::{SimpleToken, SimpleTokenKind, SimpleTokenizer};
use ruff_text_size::{TextRange, TextSize};
@ -352,6 +353,57 @@ impl<'ast> Format<PyFormatContext<'ast>> for FormatClauseHeader<'_, 'ast> {
}
}
pub(crate) struct FormatClauseBody<'a> {
body: &'a Suite,
kind: SuiteKind,
trailing_comments: &'a [SourceComment],
}
impl<'a> FormatClauseBody<'a> {
#[must_use]
pub(crate) fn with_kind(mut self, kind: SuiteKind) -> Self {
self.kind = kind;
self
}
}
pub(crate) fn clause_body<'a>(
body: &'a Suite,
trailing_comments: &'a [SourceComment],
) -> FormatClauseBody<'a> {
FormatClauseBody {
body,
kind: SuiteKind::default(),
trailing_comments,
}
}
impl Format<PyFormatContext<'_>> for FormatClauseBody<'_> {
fn fmt(&self, f: &mut Formatter<PyFormatContext<'_>>) -> FormatResult<()> {
if f.options().source_type().is_stub()
&& contains_only_an_ellipsis(self.body, f.context().comments())
&& self.trailing_comments.is_empty()
{
write!(
f,
[
space(),
self.body.format().with_options(self.kind),
hard_line_break()
]
)
} else {
write!(
f,
[
trailing_comments(self.trailing_comments),
block_indent(&self.body.format().with_options(self.kind))
]
)
}
}
}
/// Finds the range of `keyword` starting the search at `start_position`. Expects only comments and `(` between
/// the `start_position` and the `keyword` token.
fn find_keyword(

4
crates/ruff_python_formatter/src/statement/stmt_class_def.rs
View file

@ -6,7 +6,7 @@ use crate::comments::{leading_comments, trailing_comments, SourceComment};
use crate::prelude::*;
use crate::statement::suite::SuiteKind;
use crate::statement::clause::{clause_header, ClauseHeader};
use crate::statement::clause::{clause_body, clause_header, ClauseHeader};
use crate::FormatNodeRule;
#[derive(Default)]
@ -107,7 +107,7 @@ impl FormatNodeRule<StmtClassDef> for FormatStmtClassDef {
Ok(())
}),
),
block_indent(&body.format().with_options(SuiteKind::Class))
clause_body(body, trailing_definition_comments).with_kind(SuiteKind::Class),
]
)
}

6
crates/ruff_python_formatter/src/statement/stmt_for.rs
View file

@ -6,7 +6,7 @@ use crate::expression::expr_tuple::TupleParentheses;
use crate::expression::maybe_parenthesize_expression;
use crate::expression::parentheses::Parenthesize;
use crate::prelude::*;
use crate::statement::clause::{clause_header, ClauseHeader, ElseClause};
use crate::statement::clause::{clause_body, clause_header, ClauseHeader, ElseClause};
use crate::FormatNodeRule;
#[derive(Debug)]
@ -64,7 +64,7 @@ impl FormatNodeRule<StmtFor> for FormatStmtFor {
maybe_parenthesize_expression(iter, item, Parenthesize::IfBreaks),
],
),
block_indent(&body.format())
clause_body(body, trailing_condition_comments),
]
)?;
@ -86,7 +86,7 @@ impl FormatNodeRule<StmtFor> for FormatStmtFor {
&text("else"),
)
.with_leading_comments(leading, body.last()),
block_indent(&orelse.format())
clause_body(orelse, trailing),
]
)?;
}

4
crates/ruff_python_formatter/src/statement/stmt_function_def.rs
View file

@ -6,7 +6,7 @@ use crate::comments::SourceComment;
use crate::expression::maybe_parenthesize_expression;
use crate::expression::parentheses::{Parentheses, Parenthesize};
use crate::prelude::*;
use crate::statement::clause::{clause_header, ClauseHeader};
use crate::statement::clause::{clause_body, clause_header, ClauseHeader};
use crate::statement::stmt_class_def::FormatDecorators;
use crate::statement::suite::SuiteKind;
use crate::FormatNodeRule;
@ -142,7 +142,7 @@ impl FormatNodeRule<StmtFunctionDef> for FormatStmtFunctionDef {
group(&format_inner).fmt(f)
}),
),
block_indent(&body.format().with_options(SuiteKind::Function))
clause_body(body, trailing_definition_comments).with_kind(SuiteKind::Function),
]
)
}

6
crates/ruff_python_formatter/src/statement/stmt_if.rs
View file

@ -6,7 +6,7 @@ use crate::comments::SourceComment;
use crate::expression::maybe_parenthesize_expression;
use crate::expression::parentheses::Parenthesize;
use crate::prelude::*;
use crate::statement::clause::{clause_header, ClauseHeader};
use crate::statement::clause::{clause_body, clause_header, ClauseHeader};
use crate::FormatNodeRule;
#[derive(Default)]
@ -36,7 +36,7 @@ impl FormatNodeRule<StmtIf> for FormatStmtIf {
maybe_parenthesize_expression(test, item, Parenthesize::IfBreaks),
],
),
block_indent(&body.format())
clause_body(body, trailing_colon_comment),
]
)?;
@ -98,7 +98,7 @@ pub(crate) fn format_elif_else_clause(
}),
)
.with_leading_comments(leading_comments, last_node),
block_indent(&body.format())
clause_body(body, trailing_colon_comment),
]
)
}

4
crates/ruff_python_formatter/src/statement/stmt_try.rs
View file

@ -6,7 +6,7 @@ use crate::comments::leading_alternate_branch_comments;
use crate::comments::SourceComment;
use crate::other::except_handler_except_handler::ExceptHandlerKind;
use crate::prelude::*;
use crate::statement::clause::{clause_header, ClauseHeader, ElseClause};
use crate::statement::clause::{clause_body, clause_header, ClauseHeader, ElseClause};
use crate::statement::{FormatRefWithRule, Stmt};
use crate::{FormatNodeRule, PyFormatter};
@ -138,7 +138,7 @@ fn format_case<'a>(
[
clause_header(header, trailing_case_comments, &text(kind.keyword()))
.with_leading_comments(leading_case_comments, previous_node),
block_indent(&body.format())
clause_body(body, trailing_case_comments),
]
)?;
(None, rest)

6
crates/ruff_python_formatter/src/statement/stmt_while.rs
View file

@ -6,7 +6,7 @@ use crate::comments::SourceComment;
use crate::expression::maybe_parenthesize_expression;
use crate::expression::parentheses::Parenthesize;
use crate::prelude::*;
use crate::statement::clause::{clause_header, ClauseHeader, ElseClause};
use crate::statement::clause::{clause_body, clause_header, ClauseHeader, ElseClause};
use crate::FormatNodeRule;
#[derive(Default)]
@ -43,7 +43,7 @@ impl FormatNodeRule<StmtWhile> for FormatStmtWhile {
maybe_parenthesize_expression(test, item, Parenthesize::IfBreaks),
]
),
block_indent(&body.format())
clause_body(body, trailing_condition_comments),
]
)?;
@ -63,7 +63,7 @@ impl FormatNodeRule<StmtWhile> for FormatStmtWhile {
&text("else")
)
.with_leading_comments(leading, body.last()),
block_indent(&orelse.format())
clause_body(orelse, trailing),
]
)?;
}

4
crates/ruff_python_formatter/src/statement/stmt_with.rs
View file

@ -11,7 +11,7 @@ use crate::expression::parentheses::{
};
use crate::other::commas;
use crate::prelude::*;
use crate::statement::clause::{clause_header, ClauseHeader};
use crate::statement::clause::{clause_body, clause_header, ClauseHeader};
use crate::{FormatNodeRule, PyFormatOptions};
#[derive(Default)]
@ -100,7 +100,7 @@ impl FormatNodeRule<StmtWith> for FormatStmtWith {
Ok(())
})
),
block_indent(&item.body.format())
clause_body(&item.body, colon_comments)
]
)
}

41
crates/ruff_python_formatter/src/statement/suite.rs
View file

@ -1,4 +1,4 @@
use crate::comments::{leading_comments, trailing_comments};
use crate::comments::{leading_comments, trailing_comments, Comments};
use ruff_formatter::{write, FormatOwnedWithRule, FormatRefWithRule, FormatRuleWithOptions};
use ruff_python_ast::helpers::is_compound_statement;
use ruff_python_ast::node::AnyNodeRef;
@ -17,7 +17,7 @@ use crate::verbatim::{
};
/// Level at which the [`Suite`] appears in the source code.
#[derive(Copy, Clone, Debug)]
#[derive(Copy, Clone, Debug, Default)]
pub enum SuiteKind {
/// Statements at the module level / top level
TopLevel,
@ -29,6 +29,7 @@ pub enum SuiteKind {
Class,
/// Statements in any other body (e.g., `if` or `while`).
#[default]
Other,
}
@ -168,9 +169,15 @@ impl FormatRule<Suite, PyFormatContext<'_>> for FormatSuite {
// ```
let class_sequences_with_ellipsis_only =
preceding.as_class_def_stmt().is_some_and(|class| {
contains_only_an_ellipsis(&class.body)
contains_only_an_ellipsis(
&class.body,
f.context().comments(),
)
}) && following.as_class_def_stmt().is_some_and(|class| {
contains_only_an_ellipsis(&class.body)
contains_only_an_ellipsis(
&class.body,
f.context().comments(),
)
});
// Two subsequent functions where the preceding has an ellipsis only body
@ -180,7 +187,10 @@ impl FormatRule<Suite, PyFormatContext<'_>> for FormatSuite {
// ```
let function_with_ellipsis =
preceding.as_function_def_stmt().is_some_and(|function| {
contains_only_an_ellipsis(&function.body)
contains_only_an_ellipsis(
&function.body,
f.context().comments(),
)
}) && following.is_function_def_stmt();
// Don't add an empty line between two classes that have an `...` body only or after
@ -325,16 +335,19 @@ impl FormatRule<Suite, PyFormatContext<'_>> for FormatSuite {
}
}
/// Returns `true` if a function or class body contains only an ellipsis.
fn contains_only_an_ellipsis(body: &[Stmt]) -> bool {
/// Returns `true` if a function or class body contains only an ellipsis with no comments.
pub(crate) fn contains_only_an_ellipsis(body: &[Stmt], comments: &Comments) -> bool {
match body {
[Stmt::Expr(ast::StmtExpr { value, .. })] => matches!(
value.as_ref(),
Expr::Constant(ast::ExprConstant {
value: Constant::Ellipsis,
..
})
),
[Stmt::Expr(ast::StmtExpr { value, .. })] => {
let [node] = body else { return false; };
matches!(
value.as_ref(),
Expr::Constant(ast::ExprConstant {
value: Constant::Ellipsis,
..
})
) && !comments.has_leading(node)
}
_ => false,
}
}