openpgp: Implement FromStr for some types.

  - This implements std::str::FromStr for types that have
    string-representations and are reasonably likely to be encountered
    by downstream users, e.g. fingerprints or messages.  This allows
    us to do `"xxx".parse()?`.

  - Fixes #320.

1 files changed, 8 insertions, 0 deletions

diff --git a/openpgp/src/tpk/mod.rs b/openpgp/src/tpk/mod.rs
index fb1ae43e..29f59da2 100644
--- a/openpgp/src/tpk/mod.rs
+++ b/openpgp/src/tpk/mod.rs
@@ -368,6 +368,14 @@ impl<'a> Parse<'a, TPKParser<'a, vec::IntoIter<Packet>>>
     }
 }
 
+impl std::str::FromStr for TPK {
+    type Err = failure::Error;
+
+    fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
+        Self::from_bytes(s.as_bytes())
+    }
+}
+
 impl<'a, I: Iterator<Item=Packet>> TPKParser<'a, I> {
     /// Initializes a TPKParser from an iterator over Packets.
     pub fn from_iter(iter: I) -> Self {