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GHC 9.10.3 · lts/ghc-9.10.x · c74966e · 2026-09-27

Modulemonoid-subclasses-1.2.5.1Haskell2010

Data.Monoid.Instances.Measured

This module defines the monoid transformer data type Measured.

  • 1 type
  • 2 values
datadata Measured a
#

Measured a is a wrapper around the FactorialMonoid a that memoizes the monoid's length so it becomes a constant-time operation. The parameter is restricted to the StableFactorial class, which guarantees that length (a <> b) == length a + length b.

Instances17Eq, Data, Ord, Show, IsString, Semigroup, …