QDoc allows code-expanding macros to be defined so that the user can
abstract away common code in a simple to use command.
Furthermore, macros allows for a different expansion based on the
currently generated format so that format-specific requirements can be
satisfied when required.
Due to a certain bug in QDoc, when generating the DocBook format, QDoc
would expand an HTML specific macro definition when a DocBook specific
one was not provided.
As this bug is now being fixed, the DocBook format will lose some of the
output that it was previously generating.
For example, the "\youtube" macro is defined, for HTML, so that a
youtube video can be embedded by reference.
To avoid losing the usage of "\youtube" when generating DocBook, an
equivalent version expansion of the macro is now provided for the
DocBook format.
Change-Id: Id74155f2c30b80b5f4490f8451cd8d00535806d6
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
5c66c08bed