base-4.20.0.0: Core data structures and operations
Copyright(c) The FFI task force 2001
LicenseBSD-style (see the file libraries/base/LICENSE)
Maintainerffi@haskell.org
Stabilityprovisional
Portabilityportable
Safe HaskellSafe-Inferred
LanguageHaskell2010

Foreign.C.Types

Description

Mapping of C types to corresponding Haskell types.

Synopsis

Representations of C types

newtype CChar Source #

Haskell type representing the C char type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CChar Int8 

Instances

Instances details
Bits CChar 
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Defined in GHC.Internal.Foreign.C.Types

FiniteBits CChar 
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Bounded CChar 
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Enum CChar 
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Storable CChar 
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Ix CChar 
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Num CChar 
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Read CChar 
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Integral CChar 
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Real CChar 
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Show CChar 
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Eq CChar 
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Defined in GHC.Internal.Foreign.C.Types

Methods

(==) :: CChar -> CChar -> Bool Source #

(/=) :: CChar -> CChar -> Bool Source #

Ord CChar 
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Defined in GHC.Internal.Foreign.C.Types

newtype CSChar Source #

Haskell type representing the C signed char type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CSChar Int8 

Instances

Instances details
Bits CSChar 
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Defined in GHC.Internal.Foreign.C.Types

FiniteBits CSChar 
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Bounded CSChar 
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Enum CSChar 
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Storable CSChar 
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Ix CSChar 
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Num CSChar 
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Read CSChar 
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Integral CSChar 
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Real CSChar 
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Show CSChar 
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Eq CSChar 
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Ord CSChar 
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newtype CUChar Source #

Haskell type representing the C unsigned char type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CUChar Word8 

Instances

Instances details
Bits CUChar 
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Defined in GHC.Internal.Foreign.C.Types

FiniteBits CUChar 
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Bounded CUChar 
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Enum CUChar 
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Storable CUChar 
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Ix CUChar 
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Num CUChar 
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Read CUChar 
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Integral CUChar 
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Real CUChar 
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Show CUChar 
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Eq CUChar 
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Ord CUChar 
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newtype CShort Source #

Haskell type representing the C short type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CShort Int16 

Instances

Instances details
Bits CShort 
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FiniteBits CShort 
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Bounded CShort 
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Enum CShort 
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Storable CShort 
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Ix CShort 
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Num CShort 
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Read CShort 
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Integral CShort 
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Real CShort 
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Show CShort 
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Eq CShort 
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Ord CShort 
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newtype CUShort Source #

Haskell type representing the C unsigned short type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CUShort Word16 

Instances

Instances details
Bits CUShort 
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FiniteBits CUShort 
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Bounded CUShort 
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Enum CUShort 
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Storable CUShort 
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Ix CUShort 
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Num CUShort 
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Read CUShort 
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Integral CUShort 
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Real CUShort 
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Show CUShort 
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Eq CUShort 
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Ord CUShort 
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newtype CInt Source #

Haskell type representing the C int type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CInt Int32 

Instances

Instances details
Bits CInt 
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FiniteBits CInt 
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Bounded CInt 
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Enum CInt 
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Storable CInt 
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Ix CInt 
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Num CInt 
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Read CInt 
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Integral CInt 
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Real CInt 
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Show CInt 
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Eq CInt 
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Methods

(==) :: CInt -> CInt -> Bool Source #

(/=) :: CInt -> CInt -> Bool Source #

Ord CInt 
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Defined in GHC.Internal.Foreign.C.Types

newtype CUInt Source #

Haskell type representing the C unsigned int type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CUInt Word32 

Instances

Instances details
Bits CUInt 
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FiniteBits CUInt 
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Bounded CUInt 
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Enum CUInt 
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Storable CUInt 
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Ix CUInt 
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Num CUInt 
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Read CUInt 
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Integral CUInt 
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Real CUInt 
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Show CUInt 
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Eq CUInt 
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Methods

(==) :: CUInt -> CUInt -> Bool Source #

(/=) :: CUInt -> CUInt -> Bool Source #

Ord CUInt 
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newtype CLong Source #

Haskell type representing the C long type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CLong Int64 

Instances

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Bits CLong 
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FiniteBits CLong 
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Bounded CLong 
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Enum CLong 
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Storable CLong 
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Ix CLong 
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Num CLong 
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Read CLong 
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Integral CLong 
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Real CLong 
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Show CLong 
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Eq CLong 
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Methods

(==) :: CLong -> CLong -> Bool Source #

(/=) :: CLong -> CLong -> Bool Source #

Ord CLong 
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Defined in GHC.Internal.Foreign.C.Types

newtype CULong Source #

Haskell type representing the C unsigned long type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CULong Word64 

Instances

Instances details
Bits CULong 
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FiniteBits CULong 
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Bounded CULong 
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Enum CULong 
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Storable CULong 
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Ix CULong 
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Num CULong 
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Read CULong 
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Integral CULong 
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Real CULong 
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Show CULong 
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Eq CULong 
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Ord CULong 
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newtype CPtrdiff Source #

Haskell type representing the C ptrdiff_t type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CPtrdiff Int64 

Instances

Instances details
Bits CPtrdiff 
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FiniteBits CPtrdiff 
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Bounded CPtrdiff 
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Enum CPtrdiff 
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Storable CPtrdiff 
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Ix CPtrdiff 
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Num CPtrdiff 
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Read CPtrdiff 
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Integral CPtrdiff 
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Real CPtrdiff 
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Show CPtrdiff 
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Eq CPtrdiff 
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Ord CPtrdiff 
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newtype CSize Source #

Haskell type representing the C size_t type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CSize Word64 

Instances

Instances details
Bits CSize 
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FiniteBits CSize 
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Bounded CSize 
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Enum CSize 
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Storable CSize 
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Ix CSize 
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Num CSize 
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Read CSize 
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Integral CSize 
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Real CSize 
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Show CSize 
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Eq CSize 
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Methods

(==) :: CSize -> CSize -> Bool Source #

(/=) :: CSize -> CSize -> Bool Source #

Ord CSize 
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Defined in GHC.Internal.Foreign.C.Types

newtype CWchar Source #

Haskell type representing the C wchar_t type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CWchar Int32 

Instances

Instances details
Bits CWchar 
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FiniteBits CWchar 
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Bounded CWchar 
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Enum CWchar 
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Storable CWchar 
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Ix CWchar 
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Num CWchar 
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Read CWchar 
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Integral CWchar 
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Real CWchar 
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Show CWchar 
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Eq CWchar 
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Ord CWchar 
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newtype CSigAtomic Source #

Haskell type representing the C sig_atomic_t type. (The concrete types of Foreign.C.Types are platform-specific.) See Note [Lack of signals on wasm32-wasi].

Constructors

CSigAtomic Int32 

Instances

Instances details
Bits CSigAtomic 
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FiniteBits CSigAtomic 
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Bounded CSigAtomic 
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Enum CSigAtomic 
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Storable CSigAtomic 
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Ix CSigAtomic 
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Num CSigAtomic 
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Read CSigAtomic 
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Integral CSigAtomic 
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Real CSigAtomic 
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Show CSigAtomic 
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Eq CSigAtomic 
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Ord CSigAtomic 
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newtype CLLong Source #

Haskell type representing the C long long type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CLLong Int64 

Instances

Instances details
Bits CLLong 
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FiniteBits CLLong 
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Bounded CLLong 
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Enum CLLong 
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Storable CLLong 
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Ix CLLong 
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Num CLLong 
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Read CLLong 
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Integral CLLong 
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Real CLLong 
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Show CLLong 
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Eq CLLong 
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Ord CLLong 
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newtype CULLong Source #

Haskell type representing the C unsigned long long type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CULLong Word64 

Instances

Instances details
Bits CULLong 
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Defined in GHC.Internal.Foreign.C.Types

FiniteBits CULLong 
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Bounded CULLong 
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Enum CULLong 
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Storable CULLong 
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Ix CULLong 
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Num CULLong 
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Read CULLong 
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Integral CULLong 
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Real CULLong 
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Show CULLong 
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Eq CULLong 
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Ord CULLong 
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newtype CBool Source #

Haskell type representing the C bool type. (The concrete types of Foreign.C.Types are platform-specific.)

Since: base-4.10.0.0

Constructors

CBool Word8 

Instances

Instances details
Bits CBool 
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FiniteBits CBool 
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Bounded CBool 
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Enum CBool 
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Storable CBool 
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Ix CBool 
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Num CBool 
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Read CBool 
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Integral CBool 
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Real CBool 
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Show CBool 
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Eq CBool 
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Methods

(==) :: CBool -> CBool -> Bool Source #

(/=) :: CBool -> CBool -> Bool Source #

Ord CBool 
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Defined in GHC.Internal.Foreign.C.Types

newtype CIntPtr Source #

Constructors

CIntPtr Int64 

Instances

Instances details
Bits CIntPtr 
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FiniteBits CIntPtr 
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Bounded CIntPtr 
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Enum CIntPtr 
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Storable CIntPtr 
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Ix CIntPtr 
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Num CIntPtr 
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Read CIntPtr 
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Integral CIntPtr 
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Real CIntPtr 
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Show CIntPtr 
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Eq CIntPtr 
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Ord CIntPtr 
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newtype CUIntPtr Source #

Constructors

CUIntPtr Word64 

Instances

Instances details
Bits CUIntPtr 
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FiniteBits CUIntPtr 
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Bounded CUIntPtr 
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Enum CUIntPtr 
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Storable CUIntPtr 
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Ix CUIntPtr 
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Num CUIntPtr 
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Read CUIntPtr 
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Integral CUIntPtr 
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Real CUIntPtr 
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Show CUIntPtr 
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Eq CUIntPtr 
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Ord CUIntPtr 
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newtype CIntMax Source #

Constructors

CIntMax Int64 

Instances

Instances details
Bits CIntMax 
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FiniteBits CIntMax 
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Bounded CIntMax 
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Enum CIntMax 
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Storable CIntMax 
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Ix CIntMax 
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Num CIntMax 
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Read CIntMax 
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Integral CIntMax 
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Real CIntMax 
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Show CIntMax 
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Eq CIntMax 
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Ord CIntMax 
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newtype CUIntMax Source #

Constructors

CUIntMax Word64 

Instances

Instances details
Bits CUIntMax 
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FiniteBits CUIntMax 
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Bounded CUIntMax 
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Enum CUIntMax 
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Storable CUIntMax 
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Ix CUIntMax 
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Num CUIntMax 
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Read CUIntMax 
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Integral CUIntMax 
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Real CUIntMax 
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Show CUIntMax 
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Eq CUIntMax 
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Ord CUIntMax 
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Numeric types

These types are represented as newtypes of basic foreign types, and are instances of Eq, Ord, Num, Read, Show, Enum, Typeable and Storable.

newtype CClock Source #

Haskell type representing the C clock_t type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CClock Int64 

Instances

Instances details
Enum CClock 
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Storable CClock 
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Num CClock 
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Read CClock 
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Real CClock 
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Show CClock 
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Eq CClock 
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Ord CClock 
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newtype CTime Source #

Haskell type representing the C time_t type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CTime Int64 

Instances

Instances details
Enum CTime 
Instance details

Defined in GHC.Internal.Foreign.C.Types

Storable CTime 
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Defined in GHC.Internal.Foreign.C.Types

Num CTime 
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Defined in GHC.Internal.Foreign.C.Types

Read CTime 
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Defined in GHC.Internal.Foreign.C.Types

Real CTime 
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Defined in GHC.Internal.Foreign.C.Types

Show CTime 
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Defined in GHC.Internal.Foreign.C.Types

Eq CTime 
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Defined in GHC.Internal.Foreign.C.Types

Methods

(==) :: CTime -> CTime -> Bool Source #

(/=) :: CTime -> CTime -> Bool Source #

Ord CTime 
Instance details

Defined in GHC.Internal.Foreign.C.Types

newtype CUSeconds Source #

Haskell type representing the C useconds_t type. (The concrete types of Foreign.C.Types are platform-specific.)

Since: base-4.4.0.0

Constructors

CUSeconds Word32 

Instances

Instances details
Enum CUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Storable CUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Num CUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Read CUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Real CUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Show CUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Eq CUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Ord CUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

newtype CSUSeconds Source #

Haskell type representing the C suseconds_t type. (The concrete types of Foreign.C.Types are platform-specific.)

Since: base-4.4.0.0

Constructors

CSUSeconds Int64 

Instances

Instances details
Enum CSUSeconds 
Instance details

Defined in GHC.Internal.Foreign.C.Types

Storable CSUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Num CSUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Read CSUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Real CSUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Show CSUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Eq CSUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

Ord CSUSeconds 
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Defined in GHC.Internal.Foreign.C.Types

To convert CTime to UTCTime, use the following:

\t -> posixSecondsToUTCTime (realToFrac t :: POSIXTime)

Floating types

These types are represented as newtypes of Float and Double, and are instances of Eq, Ord, Num, Read, Show, Enum, Typeable, Storable, Real, Fractional, Floating, RealFrac and RealFloat. That does mean that CFloat's (respectively CDouble's) instances of Eq, Ord, Num and Fractional are as badly behaved as Float's (respectively Double's).

newtype CFloat Source #

Haskell type representing the C float type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CFloat Float 

Instances

Instances details
Enum CFloat 
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Defined in GHC.Internal.Foreign.C.Types

Floating CFloat 
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Defined in GHC.Internal.Foreign.C.Types

RealFloat CFloat 
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Defined in GHC.Internal.Foreign.C.Types

Storable CFloat 
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Defined in GHC.Internal.Foreign.C.Types

Num CFloat 
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Defined in GHC.Internal.Foreign.C.Types

Read CFloat 
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Defined in GHC.Internal.Foreign.C.Types

Fractional CFloat 
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Defined in GHC.Internal.Foreign.C.Types

Real CFloat 
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Defined in GHC.Internal.Foreign.C.Types

RealFrac CFloat 
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Defined in GHC.Internal.Foreign.C.Types

Show CFloat 
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Defined in GHC.Internal.Foreign.C.Types

Eq CFloat 
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Defined in GHC.Internal.Foreign.C.Types

Ord CFloat 
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Defined in GHC.Internal.Foreign.C.Types

newtype CDouble Source #

Haskell type representing the C double type. (The concrete types of Foreign.C.Types are platform-specific.)

Constructors

CDouble Double 

Instances

Instances details
Enum CDouble 
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Defined in GHC.Internal.Foreign.C.Types

Floating CDouble 
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Defined in GHC.Internal.Foreign.C.Types

RealFloat CDouble 
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Defined in GHC.Internal.Foreign.C.Types

Storable CDouble 
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Defined in GHC.Internal.Foreign.C.Types

Num CDouble 
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Defined in GHC.Internal.Foreign.C.Types

Read CDouble 
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Defined in GHC.Internal.Foreign.C.Types

Fractional CDouble 
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Defined in GHC.Internal.Foreign.C.Types

Real CDouble 
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Defined in GHC.Internal.Foreign.C.Types

RealFrac CDouble 
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Defined in GHC.Internal.Foreign.C.Types

Show CDouble 
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Defined in GHC.Internal.Foreign.C.Types

Eq CDouble 
Instance details

Defined in GHC.Internal.Foreign.C.Types

Ord CDouble 
Instance details

Defined in GHC.Internal.Foreign.C.Types

Other types

data CFile Source #

Haskell type representing the C FILE type. (The concrete types of Foreign.C.Types are platform-specific.)

data CFpos Source #

Haskell type representing the C fpos_t type. (The concrete types of Foreign.C.Types are platform-specific.)

data CJmpBuf Source #

Haskell type representing the C jmp_buf type. (The concrete types of Foreign.C.Types are platform-specific.)