Enums

Fix E0794: Invalid discriminant value for enum in Rust

Rust intermediate Linux macOS Windows Jul 21, 2026

Compiler error E0794 occurs when attempting to create an enum variant with a discriminant value that is invalid for the enum's representation or that does not exist in the enum definition.

Fix E0732: #[derive] on Enum with No Variants

Rust intermediate Linux macOS Windows WebAssembly May 20, 2026

E0732 occurs when using #[derive] macro on an enum with zero variants, which cannot be instantiated or have traits derived.