Pass variant index to visit_enum_simple

serde/src/ser/mod.rs

@@ -127,9 +127,10 @@ pub trait Serializer {
 
     #[inline]
     fn visit_enum_simple<T>(&mut self,
-                            _name: &str,
-                            _variant: &str,
-                            _value: T) -> Result<(), Self::Error>
+                            name: &'static str,
+                            variant_index: usize,
+                            variant: &'static str,
+                            value: T) -> Result<(), Self::Error>
         where T: Serialize;
 
     fn visit_none(&mut self) -> Result<(), Self::Error>;

serde_codegen/src/ser.rs

@@ -309,6 +309,7 @@ fn serialize_variant(
                     ::serde::ser::Serializer::visit_enum_simple(
                         serializer,
                         $type_name,
+                        $variant_index,
                         $variant_name,
                         __simple_value,
                     )

serde_json/src/ser.rs

@@ -174,6 +174,7 @@ impl<W, F> ser::Serializer for Serializer<W, F>
     #[inline]
     fn visit_enum_simple<T>(&mut self,
                             _name: &str,
+                            _variant_index: usize,
                             variant: &str,
                             value: T,
                             ) -> io::Result<()>

serde_json/src/value.rs

@@ -474,6 +474,7 @@ impl ser::Serializer for Serializer {
     #[inline]
     fn visit_enum_simple<T>(&mut self,
                             _name: &str,
+                            _variant_index: usize,
                             variant: &str,
                             value: T,
                             ) -> Result<(), ()>

serde_tests/tests/test_bytes.rs

@@ -41,6 +41,7 @@ impl serde::Serializer for BytesSerializer {
 
     fn visit_enum_simple<T>(&mut self,
                             _name: &str,
+                            _variant_index: usize,
                             _variant: &str,
                             _value: T) -> Result<(), Error>
     {

serde_tests/tests/test_ser.rs

@@ -84,6 +84,7 @@ impl<'a> Serializer for AssertSerializer<'a> {
 
     fn visit_enum_simple<T>(&mut self,
                             name: &str,
+                            _variant_index: usize,
                             variant: &str,
                             value: T,
                             ) -> Result<(), ()>