reads package:numeric-prelude

reads :: Read a => ReadS a
numeric-prelude NumericPrelude NumericPrelude.Base
equivalent to readsPrec with a precedence of 0.
type ReadS a = String -> [(a, String)]
numeric-prelude NumericPrelude NumericPrelude.Base
A parser for a type a, represented as a function that takes a String and returns a list of possible parses as (a,String) pairs. Note that this kind of backtracking parser is very inefficient; reading a large structure may be quite slow (cf ReadP).
readsNat :: (Enum i, Ord i, Read v, C a v) => T i a -> Int -> ReadS (T i v)
numeric-prelude Number.Physical.Read
readsNat :: (Read v, C a v) => T Dimension a -> Int -> ReadS (T a v)
numeric-prelude Number.SI
readsPrec :: Read a => Int -> ReadS a
numeric-prelude NumericPrelude NumericPrelude.Base
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.