z-pattern-matching/z

Exhaustivity checking

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#34 opened on Nov 28, 2017

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 (8 comments) (1 reaction) (0 assignees)JavaScript (1,714 stars) (78 forks)batch import
enhancementhelp wanted

Description

Have an option that checks if the matching is exhaustive, and if it isn't then have it immediately throw an error that the matching isn't exhaustive.

Contributor guide

Tech stack
javascript
Domain
toolingdeveloper experience
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Basic JavaScriptFamiliarity with z libraryUnderstanding of pattern matching
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Review the issue comments for any prior discussion on exhaustivity checking. Examine the library's source code, particularly the main matching function in `src/` to understand current pattern matching logic. Look at existing tests to see expected behavior. Propose a design for an option that enables exhaustivity checking, possibly by adding a configuration parameter. Consider implementing a check that verifies all possible inputs are covered, leveraging the library's type or pattern system.