Merge pull request #928 from hmac/hmac/encode-format

Delegate encode_format to T in &T and Option<T>

Author: sfackler

postgres-types/src/lib.rs

@@ -844,6 +844,7 @@ pub trait ToSql: fmt::Debug {
 /// Supported Postgres message format types
 ///
 /// Using Text format in a message assumes a Postgres `SERVER_ENCODING` of `UTF8`
+#[derive(Clone, Copy, Debug)]
 pub enum Format {
     /// Text format (UTF-8)
     Text,
@@ -867,6 +868,10 @@ where
         T::accepts(ty)
     }
 
+    fn encode_format(&self) -> Format {
+        (*self).encode_format()
+    }
+
     to_sql_checked!();
 }
 
@@ -886,6 +891,13 @@ impl<T: ToSql> ToSql for Option<T> {
         <T as ToSql>::accepts(ty)
     }
 
+    fn encode_format(&self) -> Format {
+        match self {
+            Some(ref val) => val.encode_format(),
+            None => Format::Binary,
+        }
+    }
+
     to_sql_checked!();
 }