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/message/mod.rs b/openpgp/src/message/mod.rs
index d36ddb3c..30f8268d 100644
--- a/openpgp/src/message/mod.rs
+++ b/openpgp/src/message/mod.rs
@@ -338,6 +338,14 @@ impl<'a> Parse<'a, Message> for Message {
     }
 }
 
+impl std::str::FromStr for Message {
+    type Err = failure::Error;
+
+    fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
+        Self::from_bytes(s.as_bytes())
+    }
+}
+
 impl Message {
     /// Converts the `PacketPile` to a `Message`.
     ///