| Safe Haskell | Safe-Inferred |
|---|---|
| Language | Haskell2010 |
Data.Monoid.Instances.Measured
Description
This module defines the monoid transformer data type Measured.
Documentation
Measured aFactorialMonoid a that memoizes the monoid's length so it becomes a
constant-time operation. The parameter is restricted to the StableFactorialMonoid class, which guarantees that
length (a <> b) == length a + length b
Instances
| Eq a => Eq (Measured a) | |
| Ord a => Ord (Measured a) | |
| Show a => Show (Measured a) | |
| (FactorialMonoid a, IsString a) => IsString (Measured a) | |
| StableFactorialMonoid a => Monoid (Measured a) | |
| StableFactorialMonoid a => PositiveMonoid (Measured a) | |
| StableFactorialMonoid a => MonoidNull (Measured a) | |
| StableFactorialMonoid a => StableFactorialMonoid (Measured a) | |
| StableFactorialMonoid a => FactorialMonoid (Measured a) | |
| (RightGCDMonoid a, StableFactorialMonoid a) => RightGCDMonoid (Measured a) | |
| (LeftGCDMonoid a, StableFactorialMonoid a) => LeftGCDMonoid (Measured a) | |
| (RightReductiveMonoid a, StableFactorialMonoid a) => RightReductiveMonoid (Measured a) | |
| (LeftReductiveMonoid a, StableFactorialMonoid a) => LeftReductiveMonoid (Measured a) | |
| (Eq a, TextualMonoid a, StableFactorialMonoid a) => TextualMonoid (Measured a) |
measure :: FactorialMonoid a => a -> Measured a Source
Create a new Measured value.