Method SignalAction

src/include/signal.hpp:91–91

@name 构造/析构函数 @{

  /// @name 构造/析构函数
  /// @{
  SignalAction() = default;
  SignalAction(const SignalAction&) = default;
  SignalAction(SignalAction&&) = default;
  auto operator=(const SignalAction&) -> SignalAction& = default;