Function parse_existing_args

src/completion/named_args.rs:371–394

Parse the arguments text between `(` and the cursor to determine: - Which parameter names have already been used as named arguments - How many positional (non-named) arguments precede the cursor Returns `(existing_named_args, positional_count)`.

(args_text: &str)

///
/// Returns `(existing_named_args, positional_count)`.
pub fn parse_existing_args(args_text: &str) -> (Vec<String>, usize) {
    let mut named = Vec::new();
    let mut positional = 0usize;

    // Split by commas at the top level (respecting nested parens/strings)
    let args = split_args_top_level(args_text);

    for arg in &args {
        let trimmed = arg.trim();
        if trimmed.is_empty() {
            continue;
        }

        // Check if this argument is a named argument: `name: value`
        // Named args look like `identifier:` (but NOT `::`)
        if let Some(name) = extract_named_arg_name(trimmed) {
            named.push(name);
        } else {
            positional += 1;
        }
    }

    (named, positional)
}

/// Split argument text by commas at the top level (depth 0), respecting
/// nested parentheses and string literals.