Extension to glossaries for inserting the appropriate indefinite article

Consider the following acronym: \newacronym{mdp}{MDP}{Markov decision process}. The appropriate indefinite article for \ac{mdp} depends if the acronym is used (an MDP) or not (a Markov decision process).

ddbdlossaries.sty adds options to \newacronym and new macros to solve this problem. As an example, the following code produces the output A Markov decision process (MDP) is created and an MDP is destroyed.:

\newacronym[acronymarticle=an]{mdp}{MDP}{Markov decision process}
\Aac{mdp} is created and \aac{mdp} is destroyed.