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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | -- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/
-- | Compatibility with old-time for the time package
--
-- Compatibility with the <a>old-time</a> package for the "new"
-- <a>time</a> package.
@package time-compat
@version 0.1.0.3
-- | Compatibility with the <a>old-time</a> package for the "new"
-- <a>time</a> package.
--
-- This is useful for writing portable code; in particular, if you're
-- using the <a>directory</a> package and you want your code to build
-- with both GHC 7.6 and earlier versions. The version of
-- <tt>directory</tt> used with GHC 7.6 changed a dependency from
-- <tt>old-time</tt> to <tt>time</tt> which means its
-- <tt>getModificationTime</tt> function now returns a <a>UTCTime</a>
-- instead of a <a>ClockTime</a>. This type affects the public API of
-- many libraries that use it. To make such libraries portable, port your
-- code to use the <tt>time</tt> package and to only rely on
-- <a>UTCTime</a> in its public API, and call <a>toUTCTime</a> on the
-- values returned by functions like <tt>getModificationTime</tt>, for
-- example:
--
-- <pre>
-- fmap toUTCTime getModificationTime
-- </pre>
--
-- If you're using <tt>directory-1.2</tt>, <a>toUTCTime</a> will just be
-- <a>id</a> and the original value is returned intact. If you're using
-- an older <tt>directory</tt>, for example because you're building with
-- GHC 7.4, the <a>ClockTime</a> returned by <tt>getModificationTime</tt>
-- will be converted to a <a>UTCTime</a> and will be compatible with your
-- code ported to the new <tt>time</tt> package.
module Data.Time.Compat
class ToUTCTime a
toUTCTime :: ToUTCTime a => a -> UTCTime
instance Data.Time.Compat.ToUTCTime Data.Time.Clock.UTC.UTCTime
instance Data.Time.Compat.ToUTCTime System.Time.ClockTime
instance Data.Time.Compat.ToUTCTime System.Time.CalendarTime
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