public Node div(Node node)
{
Node n = node.eval();
if(!(node is NumberNode)){
throw new Exception("Right is not Number");
}
return new NumberNode(Value/(((NumberNode)n).Value));
}
public Node plus(Node node)
{
Node n = node.eval();
if(!(node is StringNode)){
throw new UmiException("Right is not String");
}
return new StringNode(Value+(((StringNode)n).Value));
}
public Node greater(Node node)
{
Node n = node.eval();
if(!(node is NumberNode)){
throw new Exception("Right is not Number");
}
if(((NumberNode)n).Value < this.Value){
return new TrueNode();
}else{
return new FalseNode();
}
}
public Node print(Node node)
{
if(node is ArgumentsNode){
Node s = null;
for(int i=0;i<((ArgumentsNode)node).Length;i++){
s = send_message((((ArgumentsNode)node)[i]).eval(),null,"to_s");
Console.WriteLine(((StringNode)s).Value);
}
return s;
}else{
Node s = send_message(node.eval(),null,"to_s");
Console.WriteLine(((StringNode)s).Value);
return s;
}
return null;
}
public Node assign(Node node)
{
Node n = node.eval();
Block.Set(name,n);
return n;
}