Provide type info to the concrete_type_name

juniper/src/macros/interface.rs

@@ -281,7 +281,7 @@ macro_rules! graphql_interface {
                     $($items)*);
             }
 
-            fn concrete_type_name(&$mainself, context: &Self::Context) -> String {
+            fn concrete_type_name(&$mainself, context: &Self::Context, _info: &()) -> String {
                 graphql_interface!(
                     @ concrete_type_name,
                     ($outname, context, $ctxt),

juniper/src/macros/object.rs

@@ -406,7 +406,7 @@ macro_rules! graphql_object {
                 mt.into_meta()
             }
 
-            fn concrete_type_name(&self, _: &Self::Context) -> String {
+            fn concrete_type_name(&self, _: &Self::Context, _: &()) -> String {
                 $outname.to_owned()
             }
 

juniper/src/macros/union.rs

@@ -131,7 +131,7 @@ macro_rules! graphql_union {
                 mt.into_meta()
             }
 
-            fn concrete_type_name(&$mainself, context: &Self::Context) -> String {
+            fn concrete_type_name(&$mainself, context: &Self::Context, _: &()) -> String {
                 graphql_union!(
                     @ concrete_type_name,
                     ($outname, context, $ctxt),

juniper/src/types/base.rs

@@ -289,7 +289,7 @@ pub trait GraphQLType: Sized {
     ///
     /// The default implementation panics.
     #[allow(unused_variables)]
-    fn concrete_type_name(&self, context: &Self::Context) -> String {
+    fn concrete_type_name(&self, context: &Self::Context, info: &Self::TypeInfo) -> String {
         panic!("concrete_type_name must be implemented by unions and interfaces");
     }
 
@@ -357,7 +357,7 @@ where
                 if f.name.item == "__typename" {
                     result.insert(
                         (*response_name).to_owned(),
-                        Value::string(instance.concrete_type_name(executor.context())),
+                        Value::string(instance.concrete_type_name(executor.context(), info)),
                     );
                     continue;
                 }

juniper_codegen/src/derive_object.rs

@@ -150,7 +150,7 @@ pub fn impl_object(ast: &syn::DeriveInput) -> Tokens {
                 Some(#name)
             }
 
-            fn concrete_type_name(&self, _: &Self::Context) -> String {
+            fn concrete_type_name(&self, _: &Self::Context, _: &()) -> String {
                 #name.to_string()
             }