Derive Macro Error 

#[derive(Error)]
{
    // Attributes available to this derive:
    #[error]
    #[display]
    #[no_constructors]
    #[no_debug]
    #[from]
}

Derive macro for automatically implementing error traits.

Supports the following attributes:

• #[error] - Mark the field containing the OhnoCore. At most one field may be marked. With no marker the macro looks for a single field whose type is named OhnoCore, so a core reached through a type alias or a renamed import has to be marked
• #[display("...")] - Custom display message with field interpolation. Positional arguments are implicitly scoped to self, so fields are referenced by their bare name (path.display(), not self.path.display())
• #[no_constructors] - Disable automatic constructor generation. The generated new() and caused_by() are pub(crate) even when the error type is pub, so an error type that needs a public constructor declares one by hand. Rejected under #[ohno::error], which adds the OhnoCore field a hand-written constructor would have to initialize
• #[no_debug] - Disable automatic Debug trait implementation
• #[from(Type1, Type2, ...)] - Generate From implementations for specified types

By default, automatically implements std::fmt::Debug unless #[no_debug] is specified, so an existing manual #[derive(Debug, Error)] collides: drop the manual Debug derive, or add #[no_debug] to keep it.

See the main ohno crate documentation for detailed usage examples.