public virtual void Visit(Symbol symbol)
{
if ((object)symbol != null)
{
symbol.Accept(this);
}
}
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));
}
