simpler TypelessFactory::deserialize

src/rstd/typeless.rs

@@ -91,10 +91,7 @@ impl<'a, Ctx: Context<'a>> Factory<'a, Ctx> for TypelessFactory<'a, Ctx> {
     type ParseError = TypelessError<'a>;
 
     fn deserialize(&self, dectx: &mut dyn DeCtx<'a, Ctx>) -> ParseResult<'a, Ctx, Self> {
-        match self.t_deserialize.de(dectx) {
-            Ok(mentionable) => Ok(mentionable),
-            Err(error) => Err(TypelessError(error)),
-        }
+        self.t_deserialize.de(dectx).map_err(TypelessError)
     }
 
     fn extend(&self, mentionable: Self::Mtbl, tail: &[u8]) -> ParseResult<'a, Ctx, Self> {