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| author | Simon Marlow <simonmar@microsoft.com> | 2007-11-02 16:00:54 +0000 |
|---|---|---|
| committer | Simon Marlow <simonmar@microsoft.com> | 2007-11-02 16:00:54 +0000 |
| commit | 27fa0a48fd6c52f696a7337e69dc17e341ddd951 (patch) | |
| tree | 5f0047bd3a290b78c2231c49589fc95ab9362e85 /libraries/base/GHC/Desugar.hs | |
| parent | 6270bf07f42dd483d6e6bceb01261da7bbe23251 (diff) | |
| download | haskell-27fa0a48fd6c52f696a7337e69dc17e341ddd951.tar.gz | |
Add module of special magic GHC desugaring helper functions
Currently containing only one such helper: (>>>) for arrow desugaring
Diffstat (limited to 'libraries/base/GHC/Desugar.hs')
| -rw-r--r-- | libraries/base/GHC/Desugar.hs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/libraries/base/GHC/Desugar.hs b/libraries/base/GHC/Desugar.hs new file mode 100644 index 0000000000..67ff6638f4 --- /dev/null +++ b/libraries/base/GHC/Desugar.hs @@ -0,0 +1,30 @@ +----------------------------------------------------------------------------- +-- | +-- Module : GHC.Desugar +-- Copyright : (c) The University of Glasgow, 2007 +-- License : see libraries/base/LICENSE +-- +-- Maintainer : cvs-ghc@haskell.org +-- Stability : internal +-- Portability : non-portable (GHC extensions) +-- +-- Support code for desugaring in GHC +-- +----------------------------------------------------------------------------- + +-- #hide +module GHC.Desugar ((>>>)) where + +import Control.Arrow (Arrow(..)) +import Control.Category ((.)) +import Prelude hiding ((.)) + +-- A version of Control.Category.>>> overloaded on Arrow +#ifndef __HADDOCK__ +(>>>) :: forall arr. Arrow arr => forall a b c. arr a b -> arr b c -> arr a c +#endif +-- NB: the type of this function is the "shape" that GHC expects +-- in tcInstClassOp. So don't put all the foralls at the front! +-- Yes, this is a bit grotesque, but heck it works and the whole +-- arrows stuff needs reworking anyway! +f >>> g = g . f |