Revision d66aa238
| ID | d66aa238c83c46f22c641e72c092d804c9125c87 |
Change type of program options to 'IO [Options]'
Some options have defaults that depend on the environment, and we
could handle these in two ways:
- use a place-holder value (e.g. data X a = Default | Custom a) that
is later read from the environment
- move the options list to IO monad, where it can read the
environment, etc.
The second option allows also displaying the actual defaults in the
`--help' output, even though it's not as nice, so I went with it.
This patch only changes the option types, without actually changing
any options yet.
Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Helga Velroyen <helgav@google.com>
Files
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