From Discord: Extracting Tags from a Schema.Union of TaggedStructs

[effect-bot]

Summary

In this conversation, a user is trying to extract tags from a Schema.Union of TaggedStructs in a TypeScript project using the Effect Typescript library. Initially, the user attempts to map over the union members to extract _tag values, expecting an array of strings, but encounters an array of Schema.Tag[] instead. A suggestion is made to expose a _tag property directly on TaggedStruct, similar to other Tagged* APIs, to facilitate this extraction.

Key takeaways:

1. Enhancing TaggedStruct API: The _tag property should be exposed on the TaggedStruct to allow easy extraction of tags, making it consistent with other Tagged* APIs.

2. Refactoring Approach: The user refactored their code to use an enum for tags instead of plain strings, allowing iteration over the enum to retrieve all tags efficiently.

3. Schema and Tagging in Effect: Using schemas and well-defined tags (via enum or similar structures) can help organize and manage complex data structures effectively in TypeScript projects.

Overall, the conversation highlights a practical approach to dealing with type system limitations and API improvements in a TypeScript schema management library.

Discord thread

https://discord.com/channels/795981131316985866/1371410719689670666