perl-lsp-code-actions 0.12.2

LSP code actions provider for Perl
Documentation 
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//! Postfix conversion code actions

use crate::types::{CodeAction, CodeActionEdit, CodeActionKind};
use perl_lsp_rename::TextEdit;
use perl_parser_core::ast::{Node, NodeKind};

/// Convert if statement to postfix form
pub fn convert_to_postfix(node: &Node, source: &str) -> Option<CodeAction> {
    if let NodeKind::If { condition, then_branch, elsif_branches, else_branch } = &node.kind {
        // Only convert simple if statements with no elsif/else
        if elsif_branches.is_empty()
            && else_branch.is_none()
            && let NodeKind::Block { statements } = &then_branch.kind
            && statements.len() == 1
        {
            let stmt = &statements[0];
            let stmt_text = &source[stmt.location.start..stmt.location.end];
            let cond_text = &source[condition.location.start..condition.location.end];

            // Check if statement is simple enough for postfix
            if !stmt_text.contains('\n') && stmt_text.len() < 80 {
                return Some(CodeAction {
                    title: "Convert to postfix if".to_string(),
                    kind: CodeActionKind::RefactorRewrite,
                    diagnostics: Vec::new(),
                    edit: CodeActionEdit {
                        changes: vec![TextEdit {
                            location: node.location,
                            new_text: format!("{} if {}", stmt_text, cond_text),
                        }],
                    },
                    is_preferred: false,
                });
            }
        }
    }

    // Similarly for while, until
    // Note: Unless is not a separate node type in this AST

    None
}