From 94f3dd25d80d0065d1409700f1b6953c5b7f40ab Mon Sep 17 00:00:00 2001
From: Erick Tryzelaar <erick.tryzelaar@gmail.com>
Date: Thu, 30 Jul 2015 20:36:15 -0700
Subject: [PATCH] Allow VariantVisitor::visit_newtype to default to calling
 visit_tuple

---
 serde/src/de/mod.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/serde/src/de/mod.rs b/serde/src/de/mod.rs
index 219b8a52..60c51edc 100644
--- a/serde/src/de/mod.rs
+++ b/serde/src/de/mod.rs
@@ -596,11 +596,14 @@ pub trait VariantVisitor {
         Err(Error::syntax_error())
     }
 
-    /// `visit_newtype` is called when deserializing a variant with a single value.
+    /// `visit_newtype` is called when deserializing a variant with a single value. By default this
+    /// uses the `visit_tuple` method to deserialize the value.
+    #[inline]
     fn visit_newtype<T>(&mut self) -> Result<T, Self::Error>
         where T: Deserialize,
     {
-        Err(Error::syntax_error())
+        let (value,) = try!(self.visit_tuple(1, impls::TupleVisitor1::new()));
+        Ok(value)
     }
 
     /// `visit_tuple` is called when deserializing a tuple-like variant.