openpgp: Add a function to unwrap a ValidKeyAmgalamtion.

  - Add a method to explicitly return the `KeyAmgalamtion` wrapped by
    a `ValidKeyAmgalamtion`.

  - Although this is possible using `into`, an explicit function makes
    it easy to do a second conversion, e.g., a change to the
    `KeyAmgalamtion`'s parts or role.  Using two `into`s in a row is
    not possible.  Instead, an intermediate variable with an explicit
    type is needed, which is less ergonomic.

1 files changed, 5 insertions, 0 deletions

diff --git a/openpgp/src/cert/key_amalgamation.rs b/openpgp/src/cert/key_amalgamation.rs
index 546b4506..6f221ab9 100644
--- a/openpgp/src/cert/key_amalgamation.rs
+++ b/openpgp/src/cert/key_amalgamation.rs
@@ -648,6 +648,11 @@ impl<'a, P, R, R2> ValidKeyAmalgamation<'a, P, R, R2>
         }
     }
 
+    /// Returns the wrapped `KeyAmalgamation`.
+    pub fn into_key_amalgamation(self) -> KeyAmalgamation<'a, P, R, R2> {
+        self.ka
+    }
+
     // NOTE: If you add a method to ValidKeyAmalgamation that takes
     // ownership of self, then don't forget to write a forwarder for
     // it for ValidPrimaryKeyAmalgamation.