Type Alias asn1_rs::OptTaggedImplicit
source · pub type OptTaggedImplicit<T, E, const TAG: u32> = Option<TaggedImplicit<T, E, TAG>>;
Expand description
A helper object to parse [ n ] IMPLICIT T OPTIONAL
A helper object implementing FromBer
and FromDer
, to parse tagged
optional values.
This helper expects context-specific tags.
Use Option<
TaggedValue
>
for a more generic implementation.
§Examples
To parse a [0] IMPLICIT INTEGER OPTIONAL
object:
use asn1_rs::{Error, FromBer, Integer, OptTaggedImplicit, TaggedValue};
let bytes = &[0xa0, 0x1, 0x2];
let (_, tagged) = OptTaggedImplicit::<Integer, Error, 0>::from_ber(bytes).unwrap();
assert_eq!(tagged, Some(TaggedValue::implicit(Integer::from(2))));
// If tagged object is not present or has different tag, parsing
// also succeeds (returning None):
let (_, tagged) = OptTaggedImplicit::<Integer, Error, 0>::from_ber(&[]).unwrap();
assert_eq!(tagged, None);
Aliased Type§
enum OptTaggedImplicit<T, E, const TAG: u32> {
None,
Some(TaggedValue<T, E, Implicit, 2, TAG>),
}