openpgp: Implement From<&Packet> for Tag

  - Implement `From<&Packet>` for `Tag`.

  - Also, implement the variant `From<Packet>` for `Tag`.

1 files changed, 14 insertions, 0 deletions

diff --git a/openpgp/src/packet/tag.rs b/openpgp/src/packet/tag.rs
index 38d4e5b5..d99b5ee5 100644
--- a/openpgp/src/packet/tag.rs
+++ b/openpgp/src/packet/tag.rs
@@ -4,6 +4,8 @@ use std::hash::{Hash, Hasher};
 
 use quickcheck::{Arbitrary, Gen};
 
+use crate::packet::Packet;
+
 /// The OpenPGP packet tags as defined in [Section 4.3 of RFC 4880].
 ///
 ///   [Section 4.3 of RFC 4880]: https://tools.ietf.org/html/rfc4880#section-4.3
@@ -152,6 +154,18 @@ impl From<&Tag> for u8 {
     }
 }
 
+impl From<&Packet> for Tag {
+    fn from(p: &Packet) -> Tag {
+        p.tag()
+    }
+}
+
+impl From<Packet> for Tag {
+    fn from(p: Packet) -> Tag {
+        p.tag()
+    }
+}
+
 impl fmt::Display for Tag {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match *self {