Macro ray 

macro_rules! ray {
    () => { ... };
    (json: $($value:expr),+ $(,)?) => { ... };
    ($($value:expr),+ $(,)?) => { ... };
}

Create a Ray handle for fluent chaining or log Serialize values immediately. ray!() returns a handle, and ray!(value, ...) logs and returns the handle so you can keep chaining. Serialization errors are converted to strings. For Debug-only types, use ray!().raw(&value).

ray!(json: value) is an alias for explicit JSON logging.

use ray::ray;

ray!("hello").green().label("init");
ray!("first", "second");
ray!(json: "explicit json").label("json");
ray!().log(&"structured").label("log");