Macro asn1_cereal::ber_alias_info

macro_rules! ber_alias_info {
    ($outer:ident ::= [$($args:tt)*] $inner:ty, $asn1_ty:expr) => { ... };
    ($outer:ident ::= $inner:ty, $asn1_ty:expr) => { ... };
}

Generate the Asn1Info implemention of an ASN.1 alias for a Rust type.