Macro capabilities 

macro_rules! capabilities {
    ($cap:ident) => { ... };
    ($cap:ident | $($rest:tt)+) => { ... };
    ($cap:ident, $($rest:tt)+) => { ... };
}

Macro for building Capabilities with a concise syntax

Examples

use ccxt_core::{capabilities, capability::Capabilities};

// Using predefined sets
let caps = capabilities!(MARKET_DATA, TRADING);

// Using individual capabilities
let caps = capabilities!(FETCH_TICKER, CREATE_ORDER, WEBSOCKET);

// Combining sets and individual capabilities
let caps = capabilities!(MARKET_DATA | FETCH_BALANCE | WEBSOCKET);