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Provide additional convenience helper functions #7

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Chratho opened this issue May 13, 2013 · 0 comments

Chratho commented May 13, 2013

To make the libraray even more convenient to use, some helpers similiar to the following would be highly appreciated:

-- ^Retrieve with default value
getDef :: MonadError CPError m =>  ConfigParser ->  SectionSpec ->  OptionSpec ->  a ->  m a
getDef cp s o d = if has_option cp s o then get cp s o else return d
-- ^Retrieve as optional
getOpt :: MonadError CPError m =>  ConfigParser ->  SectionSpec ->  OptionSpec ->  m (Maybe a)
getOpt cp s o = if has_option cp s o then liftM Just (get cp s o) else return Nothing

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