diff options
| author | Alan Zimmerman <alan.zimm@gmail.com> | 2018-04-01 21:33:53 +0200 |
|---|---|---|
| committer | Alan Zimmerman <alan.zimm@gmail.com> | 2018-04-09 21:29:05 +0200 |
| commit | 1aa1d405d8212a99ac24dcfd48024a17c3ffd296 (patch) | |
| tree | dfb9cc90fce7e4a42fd4ca9024477b3d58b60ac5 /compiler/hsSyn/HsPat.hs-boot | |
| parent | 48f55e764bb41848cff759fbea3211d8a0bbfd5b (diff) | |
| download | haskell-1aa1d405d8212a99ac24dcfd48024a17c3ffd296.tar.gz | |
Restore Trees That Grow reverted commits
The following commits were reverted prior to the release of GHC 8.4.1,
because the time to derive Data instances was too long [1].
438dd1cbba13d35f3452b4dcef3f94ce9a216905 Phab:D4147
e3ec2e7ae94524ebd111963faf34b84d942265b4 Phab:D4177
47ad6578ea460999b53eb4293c3a3b3017a56d65 Phab:D4186
The work is continuing, as the minimum bootstrap compiler is now
GHC 8.2.1, and this allows Plan B[2] for instances to be used. This
will land in a following commit.
Updates Haddock submodule
[1] https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow/Instances
[2] https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow/Instances#PLANB
Diffstat (limited to 'compiler/hsSyn/HsPat.hs-boot')
| -rw-r--r-- | compiler/hsSyn/HsPat.hs-boot | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/hsSyn/HsPat.hs-boot b/compiler/hsSyn/HsPat.hs-boot index 55c63fe7a4..d9a4d79412 100644 --- a/compiler/hsSyn/HsPat.hs-boot +++ b/compiler/hsSyn/HsPat.hs-boot @@ -11,11 +11,11 @@ import SrcLoc( Located ) import Data.Data hiding (Fixity) import Outputable -import HsExtension ( DataId, OutputableBndrId, GhcPass ) +import HsExtension ( DataIdLR, OutputableBndrId, GhcPass ) type role Pat nominal data Pat (i :: *) type LPat i = Located (Pat i) -instance (DataId p) => Data (Pat p) +instance (DataIdLR p p) => Data (Pat p) instance (p ~ GhcPass pass, OutputableBndrId p) => Outputable (Pat p) |