Macro topic

macro_rules! topic {
    ($tyname:ident, $msg:ty) => { ... };
    ($tyname:ident, $msg:ty, $path:expr,) => { ... };
    ($tyname:ident, $msg:ty, $path:expr) => { ... };
}

Topic macro

Used to define a single Topic marker type that implements the Topic trait.

Prefer the topics!() macro macro instead.

use postcard_rpc::topic;

#[derive(Debug, Serialize, Deserialize, Schema)]
pub struct Message1 {
    a: u8,
    b: u64,
}

topic!(Topic1, Message1, "topic/1");

If the path is omitted, the type name is used instead.