openpgp: Convert `Cert::from_packet_pile` into `TryFrom`

  - Drop `Cert::from_packet_pile`.

  - Fixes #462.

1 files changed, 2 insertions, 1 deletions

diff --git a/examples/guide-exploring-openpgp.rs b/examples/guide-exploring-openpgp.rs
index 298fcd6c..82296cf4 100644
--- a/examples/guide-exploring-openpgp.rs
+++ b/examples/guide-exploring-openpgp.rs
@@ -1,6 +1,7 @@
 //! https://sequoia-pgp.org/guide/exploring-openpgp/
 
 extern crate sequoia_openpgp as openpgp;
+use std::convert::TryFrom;
 use crate::openpgp::parse::Parse;
 use crate::openpgp::policy::StandardPolicy as P;
 
@@ -51,7 +52,7 @@ fn main() {
     println!();
 
     // Parse into Cert.
-    let cert = openpgp::Cert::from_packet_pile(pile).unwrap();
+    let cert = openpgp::Cert::try_from(pile).unwrap();
     println!("Fingerprint: {}", cert.fingerprint());
 
     // List userids.