public virtual void Visit(Symbol symbol)
{
if ((object)symbol != null)
{
symbol.Accept(this);
}
}
/// <summary>
/// Call the correct VisitXXX method in this class based on the particular type of symbol that is passed in.
/// Return default(TResult) if symbol is null
/// </summary>
public virtual TResult Visit(Symbol symbol, TArgument argument = default(TArgument))
{
if ((object)symbol == null)
{
return(default(TResult));
}
return(symbol.Accept(this, argument));
}
public virtual TResult Visit(Symbol symbol)
{
return((object)symbol == null
? default(TResult)
: symbol.Accept(this));
}