Revision 30d25dd8
ID | 30d25dd856cf539ca0dc798310180007abee7b6b |
Switch to new-style exception handling
Currently, we're using Prelude.catch to handle I/O errors in
htools. This style of error handling has been deprecated for a while,
but it still used to work without warnings.
However, the GHC release 7.4 has started to emit deprecation warnings
for it, so we change to the Control.Exception module; the code is a
bit less clean since we only care about I/O errors (but
Control.Exception deals with other error types too), so we have to
filter the exceptions.
Note that the new style exception handling is not really "new"; it has
existed since at least GHC 6.12, which is our oldest supported
compiler.
Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>
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