Method release_macro_calls

parser/parser.cc:377–382

  }

  absl::flat_hash_map<int64_t, Expr> release_macro_calls() {
    using std::swap;
    absl::flat_hash_map<int64_t, Expr> result;
    swap(result, macro_calls_);
    return result;
  }

  void EraseId(ExprId id) {
    positions_.erase(id);