m04-zero-cost

To fix Rust E0277 trait bound errors, ensure the required trait is implemented for your type. This skill maps E0277, E0308, and E0599 errors to targeted design questions for selecting correct generic bounds or trait objects.

Static dispatch in Rust uses generics for compile-time monomorphization with zero-cost runtime overhead, whereas dynamic dispatch uses trait objects (`dyn Trait`) for runtime flexibility. This skill provides reference tables comparing their code size and runtime cost.

Use `impl Trait` for compile-time static dispatch when the concrete type is known at compile time, and `dyn Trait` for runtime dynamic dispatch with heterogeneous types. This skill offers criteria to decide based on your compile-time knowledge and runtime requirements.

Choosing between enums and trait objects for Rust collections depends on whether the variants are known at compile time. This skill advises whether an enum, `dyn Trait`, or generic solution is appropriate for achieving high-performance heterogeneous type collections.

Rust error E0599 occurs when a method is not found on a type, often due to missing trait imports or incorrect bounds. This skill analyzes E0599 and other compile-time errors to guide you through resolving trait method visibility and object safety issues.