Macro manyhow::emit

macro_rules! emit {
    ($emitter:expr, $msg:literal) => { ... };
    ($emitter:expr, $error:expr) => { ... };
    ($emitter:expr, $($tt:tt)*) => { ... };
}

Push an error to an emitter.

The syntax is identical to error_message! and bail!, but the first argument is the Emitter.

let mut emitter = Emitter::new();
emit!(emitter, "an error message");
emit!(emitter, "an error message"; error = "with attachments");
let span = Span::call_site();
emit!(emitter, span, "error message");
let error = syn::Error::new(Span::call_site(), "an error");
emit!(emitter, error);

It can also be used with Error.

let mut error: Error = error_message!("initial error").into();
emit!(error, "an error message");

Or any collection implementing Extend.

let mut errors = Vec::new();
emit!(errors, "an error message");