Use of deprecated 'try' function in Diagrams.Backend.Cairo.Internal

[fryguybob]

(Imported from http://code.google.com/p/diagrams/issues/detail?id=63. Original issue from byor...@gmail.com on January 22, 2012, 05:10:33 PM UTC)

Compiling diagrams-cairo under GHC 7.2.1 or later currently gives this warning:

src/Diagrams/Backend/Cairo/Internal.hs:41:1:
Warning: In the use of `try'
(imported from System.IO.Error):
Deprecated: "Please use the new exceptions variant, Control.Exception.try"

Someone should look into this and figure out the Right Way (tm) to update to something non-deprecated (while being sure to preserve support for GHC 7.0.x, and even 6.12.x if possible).

[fryguybob]

(Imported. Original comment by byor...@gmail.com on January 22, 2012, 05:12:47 PM UTC)

I should add that I did look into it for about ten seconds today, just long enough to see that Control.Exception.try is not necessarily a drop-in replacement for System.IO.Error.try, so it needs a bit more care/thought than just changing an import line.

[fryguybob]

(Imported. Original comment by byor...@gmail.com on February 18, 2012, 04:25:55 PM UTC)

Sat Feb 18 11:24:34 EST 2012 Brent Yorgey byorgey@cis.upenn.edu

• switch out deprecated System.IO.Error.try for Control.Exception.try (fixes Reflection should be included in transformation returned by adjustDia #63)