public override TokenList Simplify(IToken first, IToken last)
{
if (first == null)
throw new Exception($"Operation {Text} can not be unary.");
TokenList lastList = last.Simplify();
if (lastList == null || lastList.Count != 1)
throw new Exception($"Second element of Operation {Text} is not unique.");
IntToken intToken = lastList[0] as IntToken;
if (intToken == null)
throw new Exception($"Operation {Text} must have integer second element.");
return new TokenList(first.Simplify()[intToken.Value]);
}
public virtual TokenList Simplify(IToken first, IToken last)
{
if (first == null)
{
if (CanBeUnary)
{
ITypeToken secondType = last?.Simplify()[0] as ITypeToken;
return secondType != null ? Evaluate(secondType) : new TokenList(new ExpressionToken(null, this, last));
}
throw new Exception($"Operation {Text} can not be unary.");
}
if (CanBeBinary)
{
ITypeToken firstType = first.Simplify()[0] as ITypeToken;
ITypeToken secondType = last?.Simplify()[0] as ITypeToken;
return firstType != null && secondType != null ? Evaluate(firstType, secondType) : new TokenList(new ExpressionToken(first, this, last));
}
throw new Exception($"Operation {Text} can not be binary.");
}