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| author | M Farkas-Dyck <strake888@proton.me> | 2022-09-18 20:23:23 -0800 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2022-11-08 12:53:55 -0500 |
| commit | 68f49874aa217c2222c80c596ef11ffd992b459a (patch) | |
| tree | 215cafabd967e33b9d1c70182474d3690d1767fa /compiler/GHC/Builtin/Names.hs | |
| parent | 5fe11fe612e1881bd4d1b9d5950d0d801e08e159 (diff) | |
| download | haskell-68f49874aa217c2222c80c596ef11ffd992b459a.tar.gz | |
Define `Infinite` list and use where appropriate.
Also add perf test for infinite list fusion.
In particular, in `GHC.Core`, often we deal with infinite lists of roles. Also in a few locations we deal with infinite lists of names.
Thanks to simonpj for helping to write the Note [Fusion for `Infinite` lists].
Diffstat (limited to 'compiler/GHC/Builtin/Names.hs')
| -rw-r--r-- | compiler/GHC/Builtin/Names.hs | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/compiler/GHC/Builtin/Names.hs b/compiler/GHC/Builtin/Names.hs index 57e2fcdc75..26fb6c35b4 100644 --- a/compiler/GHC/Builtin/Names.hs +++ b/compiler/GHC/Builtin/Names.hs @@ -119,7 +119,6 @@ in GHC.Builtin.Types. -} {-# LANGUAGE CPP #-} -{-# OPTIONS_GHC -Wno-incomplete-uni-patterns #-} module GHC.Builtin.Names ( Unique, Uniquable(..), hasKey, -- Re-exported for convenience @@ -143,6 +142,8 @@ import GHC.Builtin.Uniques import GHC.Types.Name import GHC.Types.SrcLoc import GHC.Data.FastString +import GHC.Data.List.Infinite (Infinite (..)) +import qualified GHC.Data.List.Infinite as Inf import Language.Haskell.Syntax.Module.Name @@ -154,9 +155,13 @@ import Language.Haskell.Syntax.Module.Name ************************************************************************ -} -allNameStrings :: [String] +allNameStrings :: Infinite String -- Infinite list of a,b,c...z, aa, ab, ac, ... etc -allNameStrings = [ c:cs | cs <- "" : allNameStrings, c <- ['a'..'z'] ] +allNameStrings = Inf.allListsOf ['a'..'z'] + +allNameStringList :: [String] +-- Infinite list of a,b,c...z, aa, ab, ac, ... etc +allNameStringList = Inf.toList allNameStrings {- ************************************************************************ |