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2014-01-17haskell-bind: change the type of CRuntimeFFI.getConcrhallgren
Change the type of getConcr from getConcr :: PGF -> Language -> Concr to getConcr :: PGF -> Language -> Maybe Concr This is to prevent programs from crashing later if you try to select a concrete syntax that is not present in a grammar.
2013-12-10move src/runtime/haskell/CRuntimeFFI to src/runtime/haskell-bind. Don't mess ↵kr.angelov
up with the stable Haskell runtime!