Const Generics

Fix E0589: Type Parameter Bound Not Satisfied for Const Generic

Rust intermediate Linux macOS Windows WebAssembly Jul 26, 2026

Comprehensive guide to fixing Rust compiler error E0589 when const generic parameters fail to satisfy required bounds.

Fix E0643: Generic Const Parameters Cannot Be Used in Function Body

Rust intermediate Linux macOS Windows WebAssembly Jul 25, 2026

Rust compiler error E0643 occurs when a const generic parameter is used in a function body in a way the compiler cannot evaluate at compile time, such as inside a match expression's return type or as an array size in a non-const context.

Fix E0208: Invalid Constraint in Const Generic Default

Rust intermediate Linux macOS Windows Jul 20, 2026

Rust compiler error E0208 occurs when a const generic parameter default contains an invalid constraint that cannot be satisfied by the default value itself.

Fix E0207: Const Parameter Type Must Be Copy in Rust

Rust intermediate Linux macOS Windows Rust Playground Jul 17, 2026

Learn how to resolve Rust compiler error E0207, which occurs when a const generic parameter uses a non-Copy type.