Reference a hidden column in a calculated column

Question

In SharePoint 2010, I have a document library in which I want to add a calculated column, which references the Name of the document. Entering the following formula works fine:

=[Title]

But I can't seem to be able to reference the [Name] field - I'm guessing because it is hidden? i.e. entering any of the following formulas:

=[Name]
=[LinkFilename]
=[BaseName]
=[NameOrTitle]

Causes:

The formula refers to a column that does not exist. Check the formula for spelling mistakes or change the non-existing column to an existing column

The only thing I can think of is somehow making the Name field unhidden - but this feels a very dangerous thing to do fiddling around with system columns. Does anyone know of another way to achieve this?

Thanks

Answer 1

Name isn't Hidden and even if it was, tinkering with OOB fields is not advisable.

It's not allowing it because it's type is File.