I've thought for a while that it would be nice to have a shorthand for `if` /
`else if` chains. For example:
if a < b then "less"
else if a == b then "equal"
else "greater"
can be rendered with more structure as:
case () of _ | a < b -> "less"
| a == b -> "equal"
| otherwise -> "greater"
but would look even nicer as:
case | a < b -> "less"
| a == b -> "equal"
| otherwise -> "greater"
The shorthand just above requires a single addition to the Haskell grammar:
exp10 -> `case` gdpat
with trivial translation to:
`case` () `of` { _ gdpat }
-- Dean
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