/// <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 NamedParam(string paramName, Expr val, TokenData token)
{
var exp = new NamedParameterExpr();
exp.Name = paramName;
exp.Value = val;
SetupContext(exp, token);
return(exp);
}
/// <summary>
/// Visits the function call expression tree
/// </summary>
/// <param name="exp"></param>
public object VisitNamedParameter(NamedParameterExpr exp)
{
return(null);
}
/// <summary>
/// Evaluate
/// </summary>
/// <returns></returns>
public object VisitNamedParameter(NamedParameterExpr expr)
{
var result = expr.Value == null ? null : expr.Value.Evaluate(this);
return(result);
}