e018: `Borrow`, `AsRef`, `Deref`: my head hurts now

Three traits which are essential for designing good, Rustic APIs.


Notes
Borrow, AsRef, and Deref are a little complicated, but they're well-worth understanding. Together, they give you tools for dealing with everything from HashMap and friends to conversions involving smart pointer types to easily using String and str or Vec and slice together.


Links

AsRef, Borrow, and Deref:

Borrow and AsRef in The Rust Programming Language
collections::borrow::Borrow
std::convert::AsRef
std::ops::Deref

persistent data structures
"Rust and Rest" – Arnin Roacher
sentry-cli
Particularly relevant previous episodes:

e008: Just like something else
e009: Composing a Rustic tune
e017: Point me where I need to go
interview::2: Raph Levien

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