Method flush_value_refs

codegraph-kernel/src/swift.rs:1454–1586

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

    // --- value references -------------------------------------------------------------

    fn flush_value_refs(&mut self, root: Node<'t>) {
        let scopes = std::mem::take(&mut self.value_scopes);
        let mut targets = std::mem::take(&mut self.fs_values);
        let counts = std::mem::take(&mut self.fs_value_counts);
        if std::env::var("CODEGRAPH_VALUE_REFS").as_deref() == Ok("0") {
            return;
        }
        if targets.is_empty() || scopes.is_empty() || util::is_generated_file(self.file_path) {
            return;
        }

        // Shadow prune — TWO cases resolve for swift: property_declaration
        // (firstSimpleIdentifier over the name/binding pattern; guard-let/
        // if-let bindings have no property_declaration → never prune) AND the
        // shared `assignment` case — a declared-then-assigned `let X: T`
        // followed by `X = …` branches counts one bump per assignment (the
        // directly_assignable_expression's simple_identifier child), pruning
        // X exactly as the wasm arm does (caught by the swift-nio sweep).
        let mut decl_counts: HashMap<&str, u32> = HashMap::new();
        let mut dstack: Vec<Node> = vec![root];
        let mut dvisited = 0usize;
        while let Some(n) = dstack.pop() {
            if dvisited >= MAX_VALUE_REF_NODES {
                break;
            }
            dvisited += 1;
            if n.kind() == "assignment" {
                let left = n
                    .child_by_field_name("left")
                    .or_else(|| n.child_by_field_name("pattern"))
                    .or_else(|| n.named_child(0));
                if let Some(left) = left {
                    if left.kind() == "identifier" {
                        let nm = self.text(left);
                        if targets.contains_key(nm) {
                            *decl_counts.entry(nm).or_insert(0) += 1;
                        }
                    } else {
                        for i in 0..left.named_child_count() {
                            let Some(c) = left.named_child(i) else { continue };
                            if matches!(c.kind(), "identifier" | "simple_identifier") {
                                let nm = self.text(c);
                                if targets.contains_key(nm) {
                                    *decl_counts.entry(nm).or_insert(0) += 1;
                                }
                            }
                        }
                    }
                }
            }
            if n.kind() == "property_declaration" {
                let vd = (0..n.named_child_count())
                    .filter_map(|i| n.named_child(i))
                    .find(|c| c.kind() == "variable_declaration"); // kotlin shape — None for swift
                let id = match vd {
                    Some(vd) => (0..vd.named_child_count())
                        .filter_map(|i| vd.named_child(i))
                        .find(|c| c.kind() == "simple_identifier"),