/// <summary>
/// Called when the item is a label item.
/// </summary>
/// <param name="target">The object that was passed to IParseItem.Visit.</param>
/// <returns>The passed target or a modification of it.</returns>
/// <exception cref="System.ArgumentNullException">If target is null.</exception>
public IParseItem Visit(LabelItem target)
{
if (target == null)
throw new ArgumentNullException("target");
tree.DefineLabel(target);
return target;
}
/// <summary>
/// Defines a new label in the current block.
/// </summary>
/// <param name="label">The label to define.</param>
public void DefineLabel(LabelItem/*!*/ label)
{
foreach (var item in cur.Labels)
{
if (item.Name == label.Name)
throw new ArgumentException(string.Format(Resources.LabelAlreadyDefined, item.Name));
}
cur.Labels.Add(label);
}
/// <summary>
/// Called when the item is a label item.
/// </summary>
/// <param name="target">The object that was passed to IParseItem.Visit.</param>
/// <returns>The passed target or a modification of it.</returns>
/// <exception cref="System.ArgumentNullException">If target is null.</exception>
public IParseItem Visit(LabelItem target)
{
if (target == null)
throw new ArgumentNullException("target");
target.UserData = target.UserData ?? compiler.CurrentGenerator.DefineLabel();
compiler.CurrentGenerator.MarkLabel((Label)target.UserData);
return target;
}
