Macro abortable_parser::wrap_err

macro_rules! wrap_err {
    ($i : expr, $f : ident! ($($args : tt) *), $e : expr) => { ... };
    ($i : expr, $f : ident($($args : tt) *), $e : expr) => { ... };
    ($i : expr, $f : ident, $e : expr) => { ... };
}

Wraps any Error return from a subparser in another error. Stores the position at this point in the parse tree allowing you to associate context with wrapped errors.