При задании правил, по идее, можно указать этапы компиляции, на которых они будут срабатывать.
The "[2]" means that the rule is active in Phase 2 and subsequent phases. The inverse notation "[~2]" is also accepted, meaning that the rule is active up to, but not including, Phase 2.
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Date: 2008-08-01 03:33 pm (UTC)При задании правил, по идее, можно указать этапы компиляции, на которых они будут срабатывать.
The "[2]" means that the rule is active in Phase 2 and subsequent phases. The inverse notation "[~2]" is also accepted, meaning that the rule is active up to, but not including, Phase 2.
http://www.haskell.org/ghc/docs/6.8.2/html/users_guide/rewrite-rules.html