A long read, but a good read. Covers the use of syn and reflect in the Rust ecosystem, what those tools are in reaction to, and the limits of that pattern. Proposes a compile-time reflection system with low- and mid-level APIs that would (in theory) allow Rust to get away from the widespread peer dependency on serde.Linked terms include:-  

• SFINAE
• dtolnay's reflect crate
• dtolnay's syn crate
• bevy's bevy_reflect crate
• C's P99 macro library
• the Rust offset_of! macro PR