Macro asn1_sequence

macro_rules! asn1_sequence {
    (
        seq $name:ident {
            $(
                $(#[$modifier:ident $(($modifier_arg:expr))?])? $field_name:ident : $field_combinator_type:ty = $field_combinator:expr
            ),*

            $(,)?
        }
    ) => { ... };
    (
        seq $name:ident {
            $(
                $(#[$modifier:ident $(($modifier_arg:expr))?])? $field_name:ident : $field_combinator_type:ty = $field_combinator:expr, spec $spec_field_combinator:expr
            ),*

            $(,)?
        }
    ) => { ... };
}

Generate a combinator for an ASN.1 SEQUENCE (with default or optional fields)

For example

asn1_sequence! {
    sequence Test {
        typ: ASN1<ObjectIdentifier> = ASN1(ObjectIdentifier),
        value: DirectoryString = DirectoryString,
    }
}

NOTE: all sub-combinators have to be prefix secure (for Pair to work) NOTE: we have the restriction that an OrdChoice combinator cannot be following an optional or default field.