Proposal: Add isLeft/isRight to Data.Either
I propose to add isLeft/isRight to Data.Either. The corresponding thread on haskell-liraries is here: http://www.haskell.org/pipermail/libraries/2012-November/018976.html
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| Trac field | Value |
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| Version | 7.6.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
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