• Herbert Valerio Riedel's avatar
    Export `Traversable()` and `Foldable()` from Prelude · c0fa383d
    Herbert Valerio Riedel authored
    This exposes *only* the type-classes w/o any of their methods.
    This is the very first step for implementing BPP (see #9586), which
    already requires breaking up several import-cycles leading back to `Prelude`.
    
    Ideally, importing `Prelude` should be avoided in most `base` modules,
    as `Prelude` does not define any entities, but rather re-exports
    existing ones.
    
    Test Plan: validate passes
    
    Reviewers: ekmett, austin
    
    Reviewed By: ekmett, austin
    
    Subscribers: simonmar, ezyang, carter
    
    Differential Revision: https://phabricator.haskell.org/D209
    
    GHC Trac Issues: #9586
    c0fa383d
T4175.stdout 2.6 KB