val field_to_value : Field.field -> valuefield_to_value field extracts value of field with witness type of it.
val get : Field_name.t -> t -> (int * value * Location.t) listget field_name header returns all values associated to field_name (several can exist into a header). It returns order, value and location if it comes from a source.
val add : Field.field -> t -> tadd field header adds field into header.
val add_or_replace : Field.field -> t -> tadd_or_replace field header adds field if it does not exist in header or replace older one by the new one.
val empty : tempty is an empty header which does not have any default values.
content header returns Content.t of the given header. If it does not exist, it returns Content.default.
val (&) : Field.field -> t -> tAlias of add.
val reduce :
(int * [> Rfc5322.field ] as 'a * Location.t) list ->
t ->
t * (int * 'a * Location.t) listmodule Encoder : sig ... endval to_stream : t -> unit -> string optionto_stream header returns a stream of the given header which can be used into protocol like SMTP.
/
val to_string : t -> string