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Glasgow Haskell Compiler
GHC
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pattern synonyms
pattern synonyms
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oops
authored
May 03, 2014
by
heisenbug
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@@ -403,7 +403,7 @@ I suggest *branching pattern synonyms* for this purpose:
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@@ -403,7 +403,7 @@ I suggest *branching pattern synonyms* for this purpose:
```
wiki
```
wiki
pattern S pred <- pred@Nothing | pred@(Just a <- Just (Succ a))
pattern S pred <- pred@Nothing | pred@(Just a <- Just (Succ a))
pattern Z = Just Z
pattern Z = Just Z
ero
```
```
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