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1. firstM :: Functor m => (a -> m a') -> (a, b) -> m (a', b)

   extra	Data.Tuple.Extra

   Update the first component of a pair.

   firstM (\x -> [x-1, x+1]) (1,"test") == [(0,"test"),(2,"test")]
   

2. first3 :: (a -> a') -> (a, b, c) -> (a', b, c)

   extra	Extra

   Update the first component of a triple.

   first3 succ (1,1,1) == (2,1,1)
   

3. firstJust :: (a -> Maybe b) -> [a] -> Maybe b

   extra	Extra

   Find the first element of a list for which the operation returns Just, along with the result of the operation. Like find but useful where the function also computes some expensive information that can be reused. Particular useful when the function is monadic, see firstJustM.

   firstJust id [Nothing,Just 3]  == Just 3
   firstJust id [Nothing,Nothing] == Nothing
   

4. firstJustM :: Monad m => (a -> m (Maybe b)) -> [a] -> m (Maybe b)

   extra	Extra

   Like findM, but also allows you to compute some additional information in the predicate.

5. firstM :: Functor m => (a -> m a') -> (a, b) -> m (a', b)

   extra	Extra

   Update the first component of a pair.

   firstM (\x -> [x-1, x+1]) (1,"test") == [(0,"test"),(2,"test")]
   

6. firstAIdKey :: Unique

   ghc	GHC.Builtin.Names

   No documentation available.

7. firstAName :: Name

   ghc	GHC.Builtin.Names

   No documentation available.

8. firstNode :: forall n (x :: Extensibility) . Block n C x -> n C O

   ghc	GHC.Cmm.Dataflow.Block

   No documentation available.

9. firstxmm :: RegNo

   ghc	GHC.CmmToAsm.X86.Regs

   No documentation available.

10. fIRST_TAG :: ConTag

    ghc	GHC.Core.DataCon

    Tags are allocated from here for real constructors or for superclass selectors

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