HLintでよく指摘される内容
今作成しているライブラリでHLint
を実行してみました。傾向としては、冗長なdo
と冗長なカッコの指摘が多いようでした。
src/Database\SQLServer\Internal\Tokens.hs:626:1: Suggestion: Use newtype instead of data Found: data ROW = ROW{columnValues :: [ColumnValue]} deriving (Show, Eq, Generic) Why not: newtype ROW = ROW{columnValues :: [ColumnValue]} deriving (Show, Eq, Generic) Note: decreases laziness
src/Database\SQLServer\Internal\Types.hs:406:20: Warning: Use replicate Found: take n $ repeat $ Bit.block Bit.bool Why not: replicate n (Bit.block Bit.bool)
src/Database\SQLServer\ResultSet.hs:467:37: Suggestion: Avoid lambda Found: \ row -> getRecord' meta row Why not: getRecord' meta
src/Lib.hs:71:20: Suggestion: Use null Found: length x == 0 Why not: null x Note: increases laziness
src/Lib.hs:90:12: Suggestion: Move brackets to avoid $ Found: "[trace] [c] ====================> RCPRequest request " ++ (show $ BS.length rcpreq) Why not: "[trace] [c] ====================> RCPRequest request " ++ show (BS.length rcpreq)
src/Lib.hs:127:3: Warning: Use maybe Found: if isJust rawsql then example_execute_sql_raw socket $ fromJust rawsql else maybe (case rpc of Just (r, _) -> example_execute_rpc socket r Nothing -> error "invalid parameter") (example_execute_sql socket) file Why not: maybe (maybe (case rpc of Just (r, _) -> example_execute_rpc socket r Nothing -> error "invalid parameter") (example_execute_sql socket) file) (example_execute_sql_raw socket) rawsql
src/Lib.hs:142:16: Suggestion: Redundant $ Found: runGet (MT.evalStateT resolveTokens []) $ batchRes Why not: runGet (MT.evalStateT resolveTokens []) batchRes
src/Lib.hs:143:3: Warning: Use when Found: if info then mapM_ (printToken) tokens else return () Why not: Control.Monad.when info $ mapM_ (printToken) tokens
src/Lib.hs:150:15: Warning: Redundant do Found: do mapM_ (mapM_ putStrLn) $ getRecordList2Str rs Why not: mapM_ (mapM_ putStrLn) $ getRecordList2Str rs
rc/Lib.hs:226:13: Suggestion: Use <$> Found: MT.lift (get :: Get RETURNSTATUS) >>= return . TknreturnStatus Why not: TknreturnStatus <$> MT.lift (get :: Get RETURNSTATUS)
src/Lib.hs:410:4: Suggestion: Redundant bracket Found: "@foo" @@ (fromGregorian 1900 1 1) Why not: "@foo" @@ fromGregorian 1900 1
.\src\Lib.hs:483:54: Suggestion: Use section Found: ((==) '=') Why not: ('=' ==)
.\src\Lib.hs:516:1: Suggestion: Use camelCase Found: exNullSql_variant = ... Why not: exNullSqlVariant = ...