Method flush_value_refs

codegraph-kernel/src/go.rs:1075–1184

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

    // --- value refs -------------------------------------------------------------------

    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 — Go declarator shapes: const_spec/var_spec (name =
        // first child) and short_var_declaration (left / expression_list).
        let mut decl_counts: HashMap<&str, u32> = HashMap::new();
        let mut bump = |decl_counts: &mut HashMap<&'t str, u32>, name_node: Option<Node<'t>>, src: &'t str, targets: &HashMap<String, u32>| {
            if let Some(n) = name_node {
                if matches!(n.kind(), "identifier" | "simple_identifier") {
                    let nm = &src[n.byte_range()];
                    if targets.contains_key(nm) {
                        *decl_counts.entry(nm).or_insert(0) += 1;
                    }
                }
            }
        };
        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;
            match n.kind() {
                "const_spec" | "var_spec" => bump(&mut decl_counts, n.named_child(0), self.src, &targets),
                "short_var_declaration" => {
                    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" {
                            bump(&mut decl_counts, Some(left), self.src, &targets);
                        } else {
                            for i in 0..left.named_child_count() {
                                bump(&mut decl_counts, left.named_child(i), self.src, &targets);
                            }
                        }
                    }
                }
                _ => {}
            }
            for i in 0..n.named_child_count() {
                if let Some(c) = n.named_child(i) {
                    dstack.push(c);
                }
            }
        }
        let shadowed: Vec<String> = decl_counts
            .iter()