guix/gnu/packages/patches/elm-compiler-fix-map-key.patch
Robert Vollmert c902458863
gnu: Add elm-compiler 0.19.0
This adds the elm compiler, version 0.19.0. This provides the
`elm` command, with the exception of the `elm reactor` subcommand.

Named `elm-compiler`, to leave space for `elm` as the full elm
including reactor.

* gnu/packages/elm.scm: New module.
(elm-compiler): New package.
* gnu/packages/patches/elm-disable-reactor.patch: New patch.
* gnu/packages/patches/elm-fix-map-key.patch: New patch.
* gnu/packages/patches/elm-relax-glsl-bound.patch: New patch.
* gnu/local.mk: Add new files.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>
2019-08-17 16:23:06 +02:00

38 lines
1.3 KiB
Diff

commit e3512d887df41a8162c3e361171c04beca08415b
Author: Tom Stejskal <tom.stejskal@gmail.com>
Date: Mon Nov 19 20:09:43 2018 +0100
Fix Map.!: given key is not an element in the map
diff --git a/compiler/src/Elm/Compiler/Type/Extract.hs b/compiler/src/Elm/Compiler/Type/Extract.hs
index 1aafe1d4..99763392 100644
--- a/compiler/src/Elm/Compiler/Type/Extract.hs
+++ b/compiler/src/Elm/Compiler/Type/Extract.hs
@@ -10,6 +10,7 @@ module Elm.Compiler.Type.Extract
import Data.Map ((!))
+import qualified Data.Map as Map
import qualified Data.Maybe as Maybe
import qualified Data.Set as Set
@@ -134,11 +135,15 @@ extractUnion interfaces (Opt.Global home name) =
else
let
pname = toPublicName home name
- unions = I._unions (interfaces ! home)
+ maybeUnions = I._unions <$> Map.lookup home interfaces
in
- case I.toUnionInternals (unions ! name) of
- Can.Union vars ctors _ _ ->
- T.Union pname vars <$> traverse extractCtor ctors
+ case Map.lookup name =<< maybeUnions of
+ Just union ->
+ case I.toUnionInternals union of
+ Can.Union vars ctors _ _ ->
+ T.Union pname vars <$> traverse extractCtor ctors
+ Nothing ->
+ return $ T.Union pname [] []
extractCtor :: Can.Ctor -> Extractor (N.Name, [T.Type])