Language

Package: ghc-indexed-traversable @ 0.1.1

Synopsis

Indexed Functor, Foldable, and Traversable typeclasses

Description

This Haskell package provides three useful generalizations:

class Functor f => FunctorWithIndex i f | f -> i where
  imap :: (i -> a -> b) -> f a -> f b
class Foldable f => FoldableWithIndex i f | f -> i where
  ifoldMap :: Monoid m => (i -> a -> m) -> f a -> m
class (FunctorWithIndex i t, FoldableWithIndex i t, Traversable t)
       => TraversableWithIndex i t | t -> i where
  itraverse :: Applicative f => (i -> a -> f b) -> t a -> f (t b)

The ghc-keys package provides similar functionality, but uses associated TypeFamilies instead of FunctionalDependencies.

Home page
https://hackage.haskell.org/package/indexed-traversable
Location
gnu/packages/haskell-xyz.scm (line: 14937, column: 2)
License

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line 14944 is way too long (91 characters)
derivation

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failed to create i586-gnu derivation: #<&package-input-error package: #<package nghttp2@1.48.0 gnu/packages/web.scm:7487 7f8ed7409c60> input: ("_" "static")>
derivation

Report failure to compile a package to a derivation

failed to create i586-gnu derivation: #<&package-input-error package: #<package nghttp2@1.48.0 gnu/packages/web.scm:7487 7fa7aa068c60> input: ("_" "static")>
derivation

Report failure to compile a package to a derivation

failed to create i586-gnu derivation: #<&package-input-error package: #<package nghttp2@1.48.0 gnu/packages/web.scm:7487 7f5755cb9c60> input: ("_" "static")>
derivation

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failed to create i586-gnu derivation: #<&package-input-error package: #<package nghttp2@1.48.0 gnu/packages/web.scm:7487 7f119da52c60> input: ("_" "static")>
derivation

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failed to create i586-gnu derivation: #<&package-input-error package: #<package nghttp2@1.48.0 gnu/packages/web.scm:7492 7fb2d2987dc0> input: ("_" "static")>
derivation

Report failure to compile a package to a derivation

failed to create i586-gnu derivation: #<&package-input-error package: #<package nghttp2@1.48.0 gnu/packages/web.scm:7492 7f3e6bc77dc0> input: ("_" "static")>
derivation

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failed to create i586-gnu derivation: #<&package-input-error package: #<package nghttp2@1.48.0 gnu/packages/web.scm:7492 7f62abeb7dc0> input: ("_" "static")>
derivation

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failed to create i586-gnu derivation: #<&package-input-error package: #<package nghttp2@1.48.0 gnu/packages/web.scm:7492 7fa23c1dddc0> input: ("_" "static")>
derivation

Report failure to compile a package to a derivation

failed to create i586-gnu derivation: #<&package-input-error package: #<package nghttp2@1.48.0 gnu/packages/web.scm:7492 7f0f10522dc0> input: ("_" "static")>