language-servers/ruff
1
0
Fork 0
mirror of https://github.com/astral-sh/ruff.git synced 2025-09-28 04:45:01 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

Make Parameters an optional field on ExprLambda (#6669)

Browse source 
## Summary

If a lambda doesn't contain any parameters, or any parameter _tokens_
(like `*`), we can use `None` for the parameters. This feels like a
better representation to me, since, e.g., what should the `TextRange` be
for a non-existent set of parameters? It also allows us to remove
several sites where we check if the `Parameters` is empty by seeing if
it contains any arguments, so semantically, we're already trying to
detect and model around this elsewhere.

Changing this also fixes a number of issues with dangling comments in
parameter-less lambdas, since those comments are now automatically
marked as dangling on the lambda. (As-is, we were also doing something
not-great whereby the lambda was responsible for formatting dangling
comments on the parameters, which has been removed.)

Closes https://github.com/astral-sh/ruff/issues/6646.

Closes https://github.com/astral-sh/ruff/issues/6647.

## Test Plan

`cargo test`
This commit is contained in:
Charlie Marsh 2023-08-18 11:34:54 -04:00 • committed by GitHub
parent ea72d5feba
commit 6a5acde226
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
30 changed files with 517 additions and 412 deletions
Download patch file Download diff file Expand all files Collapse all files

8
crates/ruff_python_codegen/src/generator.rs
View file

@ -878,9 +878,11 @@ impl<'a> Generator<'a> {
range: _,
}) => {
group_if!(precedence::LAMBDA, {
let npos = parameters.args.len() + parameters.posonlyargs.len();
self.p(if npos > 0 { "lambda " } else { "lambda" });
self.unparse_parameters(parameters);
self.p("lambda");
if let Some(parameters) = parameters {
self.p(" ");
self.unparse_parameters(parameters);
}
self.p(": ");
self.unparse_expr(body, precedence::LAMBDA);
});