public virtual bool OnUnknown(OnUnknownCallback callback) { return(false); }
public abstract TMatch Match <TMatch>(OnPositiveCallback <TMatch> positive, OnNegativeCallback <TMatch> negative, OnUnknownCallback <TMatch> unknown);
public abstract void Match(OnPositiveCallback positive, OnNegativeCallback negative, OnUnknownCallback unknown);
public override bool OnUnknown(OnUnknownCallback callback) { callback(this); return(false); }
public override TMatch Match <TMatch>(OnPositiveCallback <TMatch> positive, OnNegativeCallback <TMatch> negative, OnUnknownCallback <TMatch> unknown) { return(unknown(this)); }
public override void Match(OnPositiveCallback positive, OnNegativeCallback negative, OnUnknownCallback unknown) { unknown(this); }