I was pretty surprised, how the heck are unions different from enums? I read tha... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

jmcomets on July 21, 2017 | parent | context | favorite | on: Announcing Rust 1.19

I was pretty surprised, how the heck are unions different from enums?

I read that they're essentially the same as C unions (~untagged enums), but I have no clue how `match` works in that case.

Rusky on July 21, 2017 [–]

A pattern on a union just interprets it as the specified field. It doesn't try to determine which one was actually written to last.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact