/// <summary>
/// Evaluate > >= != == less less than
/// </summary>
/// <returns></returns>
public object VisitCompare(CompareExpr expr)
{
var node = expr;
var op = expr.Op;
// TODO: This should be here ( find a better solution )
// e.g. allow expression to support comparable ??
if(expr.Right.Nodetype == NodeTypes.SysAnyOf)
{
var anyOf = ((AnyOfExpr) expr.Right);
anyOf.CompareExpr = expr.Left;
return this.VisitAnyOf(anyOf);
}
var left = (LObject) expr.Left.Evaluate(this);
var right = (LObject) expr.Right.Evaluate(this);
return EvalHelper.Compare(node, op, left, right);
}
/// <summary>
/// Creates a unary expression with symbol scope, context, script refernce set.
/// </summary>
/// <param name="name"></param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr Compare(Expr left, Operator op, Expr right, TokenData token)
{
var exp = new CompareExpr();
exp.Left = left;
exp.Op = op;
exp.Right = right;
SetupContext(exp, token);
return exp;
}
/// <summary>
/// Visits the compare expression tree
/// </summary>
/// <param name="exp"></param>
public object VisitCompare(CompareExpr exp)
{
_callBackOnNodeStart(exp);
_callBackOnNodeStart(exp.Left);
_callBackOnNodeStart(exp.Right);
return null;
}