Yuya Nishihara 5061d4b831 dsl_util: add trait for alias substitution errors
This is basically the same as the previous patch, but for error types. Some
of these functions could be encoded as "E: From<AliasExpandError<'i>>", but
alias substitution logic is recursive, so it would have to convert E back and
force.
2024-05-26 11:21:45 +09:00
..