diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/compiler/GF/Grammar/Grammar.hs | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/compiler/GF/Grammar/Grammar.hs b/src/compiler/GF/Grammar/Grammar.hs index 8b88561d2..448fa1657 100644 --- a/src/compiler/GF/Grammar/Grammar.hs +++ b/src/compiler/GF/Grammar/Grammar.hs @@ -129,9 +129,17 @@ isInherited :: MInclude -> Ident -> Bool isInherited c = case c of MIAll -> const True - MIOnly is -> let is' = Set.fromList is in (`Set.member` is') - MIExcept is -> let is' = Set.fromList is in (`Set.notMember` is') + MIOnly is -> elemOrd is + MIExcept is -> not . elemOrd is +-- | Faster version of `elem`, using a `Set`. +-- Make sure you give this the first argument _outside_ of the inner loop +-- +-- Example: +-- > myIntersection xs ys = filter (elemOrd xs) ys +elemOrd :: Ord a => [a] -> a -> Bool +elemOrd list = (`Set.member` set) + where set = Set.fromList list inheritAll :: ModuleName -> (ModuleName,MInclude) inheritAll i = (i,MIAll) |