Method isFutureTy

include/ast/component/type.h:314–316

    return std::holds_alternative<StreamTy>(Type);
  }
  bool isFutureTy() const noexcept {
    return std::holds_alternative<FutureTy>(Type);
  }

private:
  std::variant<PrimValType, RecordTy, VariantTy, ListTy, TupleTy, FlagsTy,