Macro validify::field_err

macro_rules! field_err {
    ($field:literal, $code:literal, $errors:expr) => { ... };
    ($field:literal, $code:literal, $message:literal, $errors:expr) => { ... };
    ($field:literal, $code:literal, $message:expr, $errors:expr) => { ... };
}

Designed to be used with the schema_validation proc macro. Used for ergonomic custom error handling.

Adds a field validaton error to the generated ValidationErrors

The errors argument should pass in an instance of ValidationErrors, and usually is used with the one generated from schema_validation.

Accepts:

("field_name", "code", errors) ("field_name", "code", "custom message", errors)