Trait MessageBuffer

Source

pub trait MessageBuffer {
    // Required methods
    fn code(&self) -> u8;
    fn tail(&self) -> &[u8];

    // Provided method
    fn static_variant(    ) -> Option<LifetimesMatterLittle<impl 'static + MessageBuffer>> { ... }
}

Expand description

A trait that can implemented on in-memory encoded CoAP messages; then, an Message struct can be placed around the implementer to implement ReadableMessage.

Implementations must not alter the content returned by the accessors. As this trait is safe to implement, the content of the returned slice might change between calls even when the encoded message was owned or exclusively referenced (e.g. when backed by a RefCell). Therefore, neither this crate nor others can rely on the content upholding any unsafe guarantees – but it may (and should) panic rater than erring if the expectation of stable content is violated.