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matchopt

package
v0.2.0 Latest Latest
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 Go to latest Published: Oct 26, 2026 License: BSD-2-Clause Imports: 3 Imported by: 0

Documentation

Overview

Package matchopt provides helpers for building Option-based pattern-match arms.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Alt 

func Alt[A any](cases []O.Option[A]) O.Option[A]

Alt returns the first Some in cases, or None if all are None.

func Case 

func Case[A, B any](
	pred func(A) bool,
	f func(A) B,
) func(A) O.Option[B]

Case builds a pattern arm: if pred holds, apply f and wrap in Some; else None.

func Const 

func Const[A, B any](
	pred func(A) bool,
	value B,
) func(A) O.Option[B]

Const builds a pattern arm that yields a constant value when pred holds.

func Default 

func Default[A, B any](f func(A) B) func(A) O.Option[B]

Default builds a catch-all arm that always matches and applies f.

func First 

func First[A any](fallback A, cases []O.Option[A]) A

First returns the value of the first Some in cases, or fallback.

func Match 

func Match[A, B any](
	fallback B,
	cases []O.Kleisli[A, B],
) func(A) B

Match lazily dispatches input to the first matching case in order, returning fallback when no case matches. Unlike First, which folds already-applied options, Match applies cases itself and stops invoking them at the first Some: later cases never run, so guard cost is not paid past the match.

Types

This section is empty.

Source Files

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