FormatParameter (other/parameter.rs)

Formats a Python function parameter with annotations and spacing.

// Source: https://github.com/astral-sh/ruff | License: MIT | Copyright 2022 Charles Marsh
// Provided via justclaw.it.com; keep this notice with the code.
use crate::prelude::*;
use ruff_python_ast::Parameter;

#[derive(Default)]
pub struct FormatParameter;

impl FormatNodeRule<Parameter> for FormatParameter {
    fn fmt_fields(&self, item: &Parameter, f: &mut PyFormatter) -> FormatResult<()> {
        let Parameter {
            range: _,
            node_index: _,
            name,
            annotation,
        } = item;

        name.format().fmt(f)?;

        if let Some(annotation) = annotation.as_deref() {
            token(":").fmt(f)?;

            if f.context().comments().has_leading(annotation)
                && !f.context().is_expression_parenthesized(annotation.into())
   

... (truncated -- full source via MCP)