I still think this should be in autodoc as well. :) It would obviously not work for autodiscovered functions/methods, or those listed in :members:, but it would work where one would otherwise use the automethod/autofunction directives.
Granted, autodecoratormethod is quite an unwieldy name for a directive. Perhaps instead a field?
Any new thought about whether the autodecorator and autodecoratormethod directives will get added to autodoc. At least at a very basic level I was able to have autodecorator work for me just by extending the FunctionDocumenter class and setting objtype = 'decorator'
classDecoratorDocumenter(FunctionDocumenter):""" Specialized Documenter subclass for decorator functions. """objtype='decorator'