Module macros 

The [dispatch!] macro — ergonomic, pattern-matching update handler.

Instead of writing giant match blocks, dispatch! lets you register named handlers with optional guard clauses:

use layer_client::{Client, dispatch};
use layer_client::update::Update;

dispatch!(client, update,
    NewMessage(msg) if !msg.outgoing() => {
        println!("Got: {:?}", msg.text());
    },
    MessageEdited(msg) => {
        println!("Edited: {:?}", msg.text());
    },
    CallbackQuery(cb) => {
        client.answer_callback_query(cb.query_id, Some("✓"), false).await?;
    },
    _ => {} // catch-all for unhandled variants
);

Each arm is VariantName(binding) [if guard] => { body }. The macro expands to a plain match statement — zero overhead.