diff options
Diffstat (limited to 'src/PGF')
| -rw-r--r-- | src/PGF/Parsing/FCFG/Incremental.hs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/PGF/Parsing/FCFG/Incremental.hs b/src/PGF/Parsing/FCFG/Incremental.hs index bd95ec34e..2950c2776 100644 --- a/src/PGF/Parsing/FCFG/Incremental.hs +++ b/src/PGF/Parsing/FCFG/Incremental.hs @@ -141,7 +141,7 @@ process mbt fn !seqs !funs (item@(Active j ppos funid seqid args key0):items) ac FSymTok tok -> let !acc' = fn tok (Active j (ppos+1) funid seqid args key0) acc
in process mbt fn seqs funs items acc' chart
FSymLit d r -> let !fid = args !! d
- in case [t | set <- IntMap.lookup fid (forest chart), FConst _ t <- Set.toList set] of
+ in case [t | FConst _ t <- maybe [] Set.toList (IntMap.lookup fid (forest chart))] of
(tok:_) -> let !acc' = fn (KS tok) (Active j (ppos+1) funid seqid args key0) acc
in process mbt fn seqs funs items acc' chart
[] -> case litCatMatch fid mbt of
|