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GrammarToCanonical: bug fix: add missing case for Empty

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Thomas Hallgren
2019-09-10 12:41:16 +02:00
parent e2ddea6c7d
commit 9d3badd8b2
1 changed files with 1 additions and 0 deletions
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src/compiler/GF/Compile/GrammarToCanonical.hs
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@@ -215,6 +215,7 @@ convert' gr vs = ppT
alt (t,p) = (pre p,ppT0 t)
pre (K s) = [s]
pre Empty = [""] -- Empty == K ""
pre (Strs ts) = concatMap pre ts
pre (EPatt p) = pat p
pre t = error $ "pre "++show t