View Source Funx.Monad.Either.Left (funx v0.1.7)

Represents the Left variant of the Either monad, used to model an error or failure.

This module implements the following protocols:

Funx.Eq: Defines equality checks between Left and other Either values.
Funx.Foldable: Provides fold_l/3 and fold_r/3 to handle folding for Left values.
Funx.Monad: Implements the bind/2, map/2, and ap/2 functions for monadic operations.
Funx.Ord: Defines ordering logic for Left and Right values.

The Left monad propagates the wrapped error through operations without executing the success logic.

Summary

t(value)

pure(value)

Creates a new Left value.

@type t(value) :: %Funx.Monad.Either.Left{left: value}

@spec pure(value) :: t(value) when value: term()

Creates a new Left value.

The pure/1 function wraps a value in the Left monad, representing an error or failure.

iex> Funx.Monad.Either.Left.pure("error")
%Funx.Monad.Either.Left{left: "error"}