Method maybe_capture_fn_refs

codegraph-kernel/src/rustlang.rs:1160–1256

maybeCaptureFnRefs with RUST_SPEC's dispatch: arguments→args, assignment_expression→rhs(right), field_initializer→value(value), array_expression→list, static_item/let_declaration→varinit(value). No layers/unwrap/special — only bare identifiers qualify (`&handler` captures nothing). QUIRK: const_item is NOT in the dispatch.

(&mut self, node: Node<'t>)

    /// No layers/unwrap/special — only bare identifiers qualify (`&handler`
    /// captures nothing). QUIRK: const_item is NOT in the dispatch.
    fn maybe_capture_fn_refs(&mut self, node: Node<'t>) {
        enum Mode {
            Args,
            Rhs,
            Value,
            List,
            Varinit,
        }
        let mode = match node.kind() {
            "arguments" => Mode::Args,
            "assignment_expression" => Mode::Rhs,
            "field_initializer" => Mode::Value,
            "array_expression" => Mode::List,
            "static_item" | "let_declaration" => Mode::Varinit,
            _ => return,
        };
        if self.stack.is_empty() {
            return;
        }
        let from = self.top_row();

        let mut values: Vec<Node> = Vec::new();
        match mode {
            Mode::Args | Mode::List => {
                for i in 0..node.named_child_count() {
                    if let Some(c) = node.named_child(i) {
                        values.push(c);
                    }
                }
            }
            Mode::Rhs => {
                if let Some(rhs) = node.child_by_field_name("right") {
                    // Param-storage skip: `o.cb = cb`.
                    let lhs_text = node
                        .child_by_field_name("left")
                        .map(|l| self.text(l))
                        .unwrap_or("");
                    let lhs_last = util::lhs_last_name()
                        .captures(lhs_text)
                        .and_then(|c| c.get(1))
                        .map(|m| m.as_str());
                    if !(lhs_last.is_some() && lhs_last == Some(self.text(rhs).trim())) {
                        values.push(rhs);
                    }
                }
            }
            Mode::Value => {
                let v = node.child_by_field_name("value").or_else(|| {
                    if node.named_child_count() > 0 {
                        node.named_child(node.named_child_count() - 1)
                    } else {
                        None
                    }
                });
                if let Some(v) = v {
                    values.push(v);
                }
            }