public RSResult Evaluate(RSToken statement)
{
RSResult result = null;
switch (statement)
{
case RSBlock p:
foreach (var s in p.Tokens)
{
result = Evaluate(s);
if (result.Returnable)
{
return(result);
}
}
return(result);
case RSConstant c: return(RSResult.FromValue(c.Value));
case RSBinary b: return(Binary(b));
case RSNumber n: return(RSResult.FromValue(n.Value));
case RSString s: return(RSResult.FromValue(s.Value));
case RSOutput o:
result = Evaluate(o.Expression);
Output(result.Value);
return(result);
}
throw (new Exception($"I don't know how to evaluate {statement.GetType()} statements"));
}
public RSBlock(RSToken head, IEnumerable <RSToken> tail)
{
this.Tokens = new List <RSToken>();
this.Tokens.Add(head);
this.Tokens.AddRange(tail);
}
public RSBlock(RSToken token)
{
this.Tokens = new List <RSToken> {
token
};
}
