Class StackRecord

common/ast_traverse.cc:58–98

    absl::variant<ExprRecord, ArgRecord, ComprehensionRecord>;

struct StackRecord {
 public:
  static constexpr int kTarget = -2;

  explicit StackRecord(const Expr* e) {
    ExprRecord record;
    record.expr = e;
    record_variant = record;
  }

  StackRecord(const Expr* e, const ComprehensionExpr* comprehension,
              const Expr* comprehension_expr,
              ComprehensionArg comprehension_arg,
              bool use_comprehension_callbacks) {
    if (use_comprehension_callbacks) {
      ComprehensionRecord record;
      record.expr = e;
      record.comprehension = comprehension;
      record.comprehension_expr = comprehension_expr;
      record.comprehension_arg = comprehension_arg;
      record.use_comprehension_callbacks = use_comprehension_callbacks;
      record_variant = record;
      return;
    }
    ArgRecord record;
    record.expr = e;
    record.calling_expr = comprehension_expr;
    record.call_arg = comprehension_arg;
    record_variant = record;
  }

  StackRecord(const Expr* e, const Expr* call, int argnum) {
    ArgRecord record;
    record.expr = e;
    record.calling_expr = call;
    record.call_arg = argnum;
    record_variant = record;
  }
  StackRecordKind record_variant;
  bool visited = false;
};

struct PreVisitor {
  void operator()(const ExprRecord& record) {