tlang-interperter-cs/tlanglib/RightShift.cs

40 lines
1.0 KiB
C#

namespace tlang
{
internal class RightShiftNode : Node
{
public Node Left {get;set;}
public Node Right {get;set;}
public RightShiftNode(Node left, Node right)
{
this.Left = left;
this.Right = right;
}
public override TObject Execute(IScopeEnvironment nodeEnv)
{
var l = Left.Execute(nodeEnv);
var r = Right.Execute(nodeEnv);
var lnum = l as TNumber;
var rnum = r as TNumber;
var dleft = l as TDictionary;
if(dleft != null)
{
if(dleft.MemberExists("rs"))
{
var mbm = dleft["rs"] as ICallable;
if(mbm != null)
{
return mbm.Call(r);
}
}
}
if(lnum != null && rnum != null)
return new TNumber((long)lnum.Value >> (int)rnum.Value);
return new TNull();
}
}
}