/// <summary>
/// Create parse item of any type as long as it is derived from ParseItem
/// </summary>
/// <typeparam name="T">Type of item to create</typeparam>
/// <param name="parent">Parent element</param>
/// <param name="type">Suggested type to create</param>
/// <returns></returns>
internal ParseItem Create <T>(ComplexItem parent, Type type) where T : ParseItem, new()
{
ParseItem item = null;
if (ExternalFactory != null)
{
item = ExternalFactory.CreateItem(this, TextProvider, TokenStream, parent, type);
}
if (item == null)
{
item = new T();
}
return(item);
}
/// <summary>
/// Create specific item. Called when parser cannot accept random type and rather
/// needs a specific type. Returned item can be derived from type T.
/// </summary>
/// <typeparam name="T">Type of item to create</typeparam>
/// <param name="parent">Parent element</param>
/// <param name="type">Suggested item type</param>
/// <returns></returns>
internal T CreateSpecific <T>(ComplexItem parent, Type type) where T : ParseItem, new()
{
T item = default;
if (ExternalFactory != null)
{
ParseItem pi = ExternalFactory.CreateItem(this, TextProvider, TokenStream, parent, type);
if (pi != null)
{
item = pi as T;
Debug.Assert(item != null);
}
}
if (item == null)
{
item = new T();
}
return(item);
}