Struct Informational 

pub struct Informational<'a> {
    pub id: ConnectionId,
    pub status: StatusCode,
    pub headers: &'a HeaderMap,
}

A 1xx that arrived before the response.

Why there is no version here, when Head has one

A 1xx travels on a connection, and the connection’s protocol was already reported by the Connected or Reused that opened this exchange — both of which carry a plain Version rather than an Option, because only a transport that owns a connection emits either and owning one means having negotiated its protocol. Repeating it here would be a third place to be wrong about the same fact.

Head::version is an Option for the opposite reason: the two backends that own no connection emit Head and nothing else, so for them there is no Connected to have carried it. Neither of them can emit this event at all.

Fields

id: ConnectionId

status: StatusCode

1xx. Which one is the whole of what distinguishes a 100 from a 103, so it is not narrowed to an enum: a status this crate has never heard of is still a status the server sent.

headers: &'a HeaderMap

Trait Implementations

impl<'a> Debug for Informational<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.