Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Tips & Traps¶
The closest thing to describe Rust Enum is tagged Union. The Rust compiler adds an extra (up to) 8 bytes to the enum to store the discriminator. This is used to identify the variant currently stored in the enum. However, Rust does NOT guarantee that the memory layout of an enum is always a tag followed by a union. Instead, the Rust compiler retains the freedom to optimize the layout of types so that the code can be more memory efficient.
Sum Type in Rust
Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Enum is the preferred way to constrcut a sum type of several types (which does not implemente the same trait).
The Rust crate
either
provides an enum Either (with variants Left …
Enum in Rust
Enum in Python
Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Comments¶
- You must assign a value to each enum member.