| CCc | System.Posix.Types |
| CChar | Foreign.C Foreign.C.Types |
| CClock | Foreign.C Foreign.C.Types |
| CDev | System.Posix.Types |
| CDouble | Foreign.C Foreign.C.Types |
| CFile | Foreign.C Foreign.C.Types |
| CFloat | Foreign.C Foreign.C.Types |
| CFpos | Foreign.C Foreign.C.Types |
| CGid | System.Posix.Types |
| CIno | System.Posix.Types |
| CInt | Foreign.C Foreign.C.Types |
| CJmpBuf | Foreign.C Foreign.C.Types |
| CLDouble | Foreign.C Foreign.C.Types |
| CLLong | Foreign.C Foreign.C.Types |
| CLong | Foreign.C Foreign.C.Types |
| CMode | System.Posix.Types |
| CNlink | System.Posix.Types |
| COff | System.Posix.Types |
| CPid | System.Posix.Types |
| CPtrdiff | Foreign.C Foreign.C.Types |
| CRLim | System.Posix.Types |
| CSChar | Foreign.C Foreign.C.Types |
| CShort | Foreign.C Foreign.C.Types |
| CSigAtomic | Foreign.C Foreign.C.Types |
| CSize | Foreign.C Foreign.C.Types |
| CSpeed | System.Posix.Types |
| CSsize | System.Posix.Types |
| CString | Foreign.C Foreign.C.String |
| CStringLen | Foreign.C Foreign.C.String |
| CTcflag | System.Posix.Types |
| CTime | Foreign.C Foreign.C.Types |
| CUChar | Foreign.C Foreign.C.Types |
| CUInt | Foreign.C Foreign.C.Types |
| CULLong | Foreign.C Foreign.C.Types |
| CULong | Foreign.C Foreign.C.Types |
| CUShort | Foreign.C Foreign.C.Types |
| CUid | System.Posix.Types |
| CWchar | Foreign.C Foreign.C.Types |
| CalendarTime | System.Time |
| Chan | Control.Concurrent Control.Concurrent.Chan |
| Char | Data.Char GHC.Base GHC.Exts Prelude |
| CharParser | Text.ParserCombinators.Parsec Text.ParserCombinators.Parsec.Char |
| ClockTick | System.Posix.Types |
| ClockTime | System.Time |
| Column | Text.ParserCombinators.Parsec Text.ParserCombinators.Parsec.Pos |
| Complex | Data.Complex |
| Config | Debug.QuickCheck |
| Cont | Control.Monad.Cont |
| ContT | Control.Monad.Cont |
