Instances.TH.Lift

Documentation

This module provides orphan instances for the Lift class from template-haskell. Following is a list of the provided instances.

Lift instances are useful to precompute values at compile time using template haskell. For example, if you write the following code, you can make sure that 3 * 10 is really computed at compile time:

{-# LANGUAGE TemplateHaskell #-}

import Language.Haskell.TH.Syntax

expensiveComputation :: Word32
expensiveComputation = $(lift $ 3 * 10) -- This will computed at compile time

This uses the Lift instance for Word32.

The following instances are provided by this package:

Base

• Word8, Word16, Word32, Word64
• Int8, Int16, Int32, Int64
• NonEmpty and Void, until provided by template-haskell-2.15

Containers (both strict/lazy)

• IntMap
• IntSet
• Map
• Set
• Tree
• Seq

ByteString (both strict/lazy)

• ByteString

Text (both strict/lazy)

• Text

Vector (Boxed, Unboxed, Storable, Primitive)

• Vector

Orphan instances

Lift ByteString

Methods

lift :: ByteString -> Q Exp

liftTyped :: ByteString -> Q (TExp ByteString)

Lift ByteString

Methods

lift :: ByteString -> Q Exp

liftTyped :: ByteString -> Q (TExp ByteString)

Lift IntSet

Methods

lift :: IntSet -> Q Exp

liftTyped :: IntSet -> Q (TExp IntSet)

Lift Text

Methods

lift :: Text -> Q Exp

liftTyped :: Text -> Q (TExp Text)

Lift Text

Methods

lift :: Text -> Q Exp

liftTyped :: Text -> Q (TExp Text)

Lift a => Lift (Identity a :: Type)

Methods

lift :: Identity a -> Q Exp

liftTyped :: Identity a -> Q (TExp (Identity a))

Lift v => Lift (IntMap v :: Type)

Methods

lift :: IntMap v -> Q Exp

liftTyped :: IntMap v -> Q (TExp (IntMap v))

Lift a => Lift (Tree a :: Type)

Methods

lift :: Tree a -> Q Exp

liftTyped :: Tree a -> Q (TExp (Tree a))

Lift a => Lift (Seq a :: Type)

Methods

lift :: Seq a -> Q Exp

liftTyped :: Seq a -> Q (TExp (Seq a))

Lift a => Lift (Set a :: Type)

Methods

lift :: Set a -> Q Exp

liftTyped :: Set a -> Q (TExp (Set a))

(Unbox a, Lift a) => Lift (Vector a :: Type)

Methods

lift :: Vector a -> Q Exp

liftTyped :: Vector a -> Q (TExp (Vector a))

(Storable a, Lift a) => Lift (Vector a :: Type)

Methods

lift :: Vector a -> Q Exp

liftTyped :: Vector a -> Q (TExp (Vector a))

(Prim a, Lift a) => Lift (Vector a :: Type)

Methods

lift :: Vector a -> Q Exp

liftTyped :: Vector a -> Q (TExp (Vector a))

Lift a => Lift (Vector a :: Type)

Methods

lift :: Vector a -> Q Exp

liftTyped :: Vector a -> Q (TExp (Vector a))

(Lift k, Lift v) => Lift (Map k v :: Type)

Methods

lift :: Map k v -> Q Exp

liftTyped :: Map k v -> Q (TExp (Map k v))

Lift a => Lift (Const a b :: Type)

Methods

lift :: Const a b -> Q Exp

liftTyped :: Const a b -> Q (TExp (Const a b))