readsPrec -package:rio

readsPrec :: Read a => Int -> ReadS a
base Prelude Text.Read GHC.Read, hedgehog Hedgehog.Internal.Prelude, base-compat Prelude.Compat Text.Read.Compat, base-prelude BasePrelude, numeric-prelude NumericPrelude NumericPrelude.Base, streamly Streamly.Data.Stream.MkType, Cabal-syntax Distribution.Compat.Prelude, basic-prelude BasicPrelude, numhask NumHask.Prelude, clash-prelude Clash.HaskellPrelude, ghc-lib-parser GHC.Prelude.Basic, prelude-compat Prelude2010, ghc-internal GHC.Internal.Read GHC.Internal.Text.Read, dimensional Numeric.Units.Dimensional.Prelude, rebase Rebase.Prelude, mixed-types-num Numeric.MixedTypes.PreludeHiding, xmonad-contrib XMonad.Config.Prime, constrained-categories Control.Category.Constrained.Prelude Control.Category.Hask, copilot-language Copilot.Language.Prelude, LambdaHack Game.LambdaHack.Core.Prelude, cabal-install-solver Distribution.Solver.Compat.Prelude, faktory Faktory.Prelude, yesod-paginator Yesod.Paginator.Prelude, distribution-opensuse OpenSuse.Prelude, hledger-web Hledger.Web.Import
attempts to parse a value from the front of the string, returning a list of (parsed value, remaining string) pairs. If there is no successful parse, the returned list is empty. Derived instances of Read and Show satisfy the following: That is, readsPrec parses the string produced by showsPrec, and delivers the value that showsPrec started with.
readsPrec :: Read a => Int -> ReadS a
ghc GHC.Prelude.Basic
readsPrec1 :: (Read1 f, Read a) => Int -> ReadS (f a)
base Data.Functor.Classes, base-prelude BasePrelude, rebase Rebase.Prelude
Lift the standard readsPrec and readList functions through the type constructor.
readsPrec2 :: (Read2 f, Read a, Read b) => Int -> ReadS (f a b)
base Data.Functor.Classes, base-prelude BasePrelude, rebase Rebase.Prelude
Lift the standard readsPrec function through the type constructor.
readsPrecDefault :: (GRead (Rep1 f a), Generic1 f) => Int -> ReadS (f a)
transformers-compat Data.Functor.Classes.Generic.Internal
A default readsPrec implementation for Generic1 instances that leverages Read1.
readsPrec1Const :: ReadS (f a) -> Int -> ReadS (f a)
deriving-compat Data.Deriving.Internal
readsPrec1ConstValName :: Name
deriving-compat Data.Deriving.Internal
readsPrecConst :: ReadS a -> Int -> ReadS a
deriving-compat Data.Deriving.Internal
readsPrecConstValName :: Name
deriving-compat Data.Deriving.Internal
readsPrecValName :: Name
deriving-compat Data.Deriving.Internal
readsPrecByParsePrec :: (Int -> TextParser a) -> Int -> ReadS a
polyparse Text.Parse
If you have a TextParser for a type, you can easily make it into a Read instance, by throwing away any error messages.
readsPrecByParsePrec :: (Int -> TextParser a) -> Int -> ReadS a
polyparse Text.Parse.ByteString
If you have a TextParser for a type, you can easily make it into a Read instance, by throwing away any error messages. Use of this wrapper function is NOT recommended with ByteString, because there is a lot of inefficiency in conversions to/from String.
liftReadsPrec :: Read1 f => (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (f a)
base Data.Functor.Classes, base-prelude BasePrelude
readsPrec function for an application of the type constructor based on readsPrec and readList functions for the argument type.
liftReadsPrec2 :: Read2 f => (Int -> ReadS a) -> ReadS [a] -> (Int -> ReadS b) -> ReadS [b] -> Int -> ReadS (f a b)
base Data.Functor.Classes, base-prelude BasePrelude
readsPrec function for an application of the type constructor based on readsPrec and readList functions for the argument types.
liftReadsPrec :: Vector v a => (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (v a)
vector Data.Vector.Generic
Note: uses ReadS.
liftReadsPrecDefault :: (GRead1 NonV4 (Rep1 f), Generic1 f) => (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (f a)
transformers-compat Data.Functor.Classes.Generic Data.Functor.Classes.Generic.Internal
A sensible default liftReadsPrec implementation for Generic1 instances.
liftReadsPrecOptions :: (GRead1 NonV4 (Rep1 f), Generic1 f) => Options -> (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (f a)
transformers-compat Data.Functor.Classes.Generic Data.Functor.Classes.Generic.Internal
Like liftReadsPrecDefault, but with configurable Options. Currently, the Options have no effect (but this may change in the future).
greadsPrec :: GRead t => Int -> GReadS t
some Data.GADT.Show
liftReadsPrec2Const :: ReadS (f a b) -> (Int -> ReadS a) -> ReadS [a] -> (Int -> ReadS b) -> ReadS [b] -> Int -> ReadS (f a b)
deriving-compat Data.Deriving.Internal
liftReadsPrec2ConstValName :: Name
deriving-compat Data.Deriving.Internal
liftReadsPrec2ValName :: Name
deriving-compat Data.Deriving.Internal
liftReadsPrecConst :: ReadS (f a) -> (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (f a)
deriving-compat Data.Deriving.Internal
liftReadsPrecConstValName :: Name
deriving-compat Data.Deriving.Internal
liftReadsPrecValName :: Name
deriving-compat Data.Deriving.Internal
makeLiftReadsPrec :: Name -> Q Exp
deriving-compat Text.Read.Deriving
Generates a lambda expression which behaves like liftReadsPrec (without requiring a Read1 instance). This function is not available with transformers-0.4.