Struct DecodeWatch 

#[non_exhaustive]
pub struct DecodeWatch {
    pub before: fn(kind: &'static str) -> u32,
    pub after: fn(token: u32, decoded: &Decoded<'_>),
}

What is told of every decode the registry makes, once set (watch_decodes): two plain functions, called on the thread that decodes. Build it with DecodeWatch::new (ADR-0039).

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

before: fn(kind: &'static str) -> u32

Told the kind as a decode starts; what it gives back, a token, goes to after.

after: fn(token: u32, decoded: &Decoded<'_>)

Told the decode once it is decided, with before’s token.

Implementations

impl DecodeWatch

pub const fn new( before: fn(kind: &'static str) -> u32, after: fn(token: u32, decoded: &Decoded<'_>), ) -> Self

A watch that calls before as each decode starts and after once it is decided.

Trait Implementations

impl Clone for DecodeWatch

fn clone(&self) -> DecodeWatch

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for DecodeWatch

impl Debug for DecodeWatch

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.