Pretty-printer butchers function arrow fixity on GHC HEAD
This code:
{-# LANGUAGE TemplateHaskell #-}
{-# OPTIONS_GHC -ddump-splices #-}
module Bug where
$([d| f :: Either Int (Int -> Int)
f = undefined
|])
Pretty-prints incorrectly on GHC HEAD:
$ /opt/ghc/head/bin/ghci Bug.hs
GHCi, version 8.3.20170706: http://www.haskell.org/ghc/ :? for help
Loaded GHCi configuration from /home/rgscott/.ghci
[1 of 1] Compiling Bug ( Bug.hs, interpreted )
Bug.hs:(5,3)-(7,6): Splicing declarations
[d| f_a1sG :: Either Int (Int -> Int)
f_a1sG = undefined |]
======>
f_a4bj :: Either Int Int -> Int
f_a4bj = undefined
But not on GHC 8.2.1-rc3:
$ /opt/ghc/8.2.1/bin/ghci Bug.hs
GHCi, version 8.2.0.20170704: http://www.haskell.org/ghc/ :? for help
Loaded GHCi configuration from /home/rgscott/.ghci
[1 of 1] Compiling Bug ( Bug.hs, interpreted )
Bug.hs:(5,3)-(7,6): Splicing declarations
[d| f_a1su :: Either Int (Int -> Int)
f_a1su = undefined |]
======>
f_a4aV :: Either Int (Int -> Int)
f_a4aV = undefined
Trac metadata
Trac field | Value |
---|---|
Version | 8.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |