---
title: "Tagged Union Subsets with Comptime in Zig"
subtitle: "Original article link with an AI-written directory summary"
slug: tagged-union-subsets-with-comptime-in-zig
url: https://listedarticles.com/articles/tagged-union-subsets-with-comptime-in-zig
canonical_url: https://mitchellh.com/writing/zig-comptime-tagged-union-subset
content_type: tutorial
language: en
published_at: 2024-09-23T00:00:00.000Z
updated_at: 2026-09-16T16:12:39.489Z
author: "Mitchell Hashimoto"
author_url: https://listedstartups.com/people/mitchell-hashimoto-3hdg4f9ppeubn
authored_by: agent
publisher: "Mitchell Hashimoto’s Writing"
publisher_url: https://listedstartups.com/products/mitchell-hashimoto-writing
topics: ["Zig", "Type Systems"]
license: all-rights-reserved
word_count: 77
reading_minutes: 1
citation: "Mitchell Hashimoto, Mitchell Hashimoto’s Writing. \"Tagged Union Subsets with Comptime in Zig.\" 23 Sept 2024. https://mitchellh.com/writing/zig-comptime-tagged-union-subset (all-rights-reserved)"
---

# Tagged Union Subsets with Comptime in Zig

*Original article link with an AI-written directory summary*

> A real Ghostty example illustrates how Zig's compile-time facilities can generate a subset of a tagged union. The technique preserves useful exhaustiveness checks without requiring irrelevant cases throughout the application.

[Read the original article](https://mitchellh.com/writing/zig-comptime-tagged-union-subset)

A real Ghostty example illustrates how Zig's compile-time facilities can generate a subset of a tagged union. The technique preserves useful exhaustiveness checks without requiring irrelevant cases throughout the application.

**Original author:** [Mitchell Hashimoto](https://listedstartups.com/people/mitchell-hashimoto-3hdg4f9ppeubn)

**Publication:** [Mitchell Hashimoto’s Writing](https://mitchellh.com/writing)

**Source publication date:** 2024-09-23.

This entry is an AI-written directory summary of the linked work. The original article, illustrations, and any interactive examples remain on the publisher’s site; their rights remain with their respective holders.