Fix expansion of procedural macros inside macro_rules! (#1054, #1051)

Author: Cerber-Ursi

juniper/CHANGELOG.md

@@ -65,6 +65,7 @@ All user visible changes to `juniper` crate will be documented in this file. Thi
 - Unsupported spreading GraphQL interface fragments on unions and other interfaces. ([#965], [#798])
 - Unsupported expressions in `graphql_value!` macro. ([#996], [#503])
 - Incorrect GraphQL list coercion rules: `null` cannot be coerced to an `[Int!]!` or `[Int]!`. ([#1004])
+- All procedural macros expansion inside `macro_rules!`. ([#1054], [#1051])
 
 [#503]: /../../issues/503
 [#750]: /../../issues/750
@@ -89,6 +90,8 @@ All user visible changes to `juniper` crate will be documented in this file. Thi
 [#1017]: /../../pull/1017
 [#1025]: /../../pull/1025
 [#1026]: /../../pull/1026
+[#1051]: /../../issues/1051
+[#1054]: /../../pull/1054
 
 
 

juniper_codegen/CHANGELOG.md

@@ -37,6 +37,10 @@ All user visible changes to `juniper_codegen` crate will be documented in this f
 
 - `#[derive(GraphQLInterface)]` macro allowing using structs as GraphQL interfaces. ([#1026])
 
+### Fixed
+
+- All procedural macros expansion inside `macro_rules!`. ([#1054], [#1051])
+
 [#971]: /../../pull/971
 [#985]: /../../pull/985
 [#987]: /../../pull/987
@@ -47,6 +51,8 @@ All user visible changes to `juniper_codegen` crate will be documented in this f
 [#1017]: /../../pull/1017
 [#1025]: /../../pull/1025
 [#1026]: /../../pull/1026
+[#1051]: /../../issues/1051
+[#1054]: /../../pull/1054
 
 
 

juniper_codegen/src/common/parse/mod.rs

@@ -127,6 +127,7 @@ impl TypeExt for syn::Type {
     fn unparenthesized(&self) -> &Self {
         match self {
             Self::Paren(ty) => ty.elem.unparenthesized(),
+            Self::Group(ty) => ty.elem.unparenthesized(),
             ty => ty,
         }
     }

tests/integration/src/inside_macro.rs

@@ -0,0 +1,39 @@
+//! Checks that `#[graphql_object]` macro correctly expands inside a declarative
+//! macro definition.
+//! See [#1051](https://github.com/graphql-rust/juniper/pull/1051) and
+//! [#1054](https://github.com/graphql-rust/juniper/pull/1054) for details.
+
+use juniper::{
+    graphql_object, graphql_value, graphql_vars, EmptyMutation, EmptySubscription, RootNode,
+};
+
+macro_rules! impl_id {
+    ($typename:ident) => {
+        #[graphql_object]
+        impl $typename {
+            fn id(&self) -> i32 {
+                42
+            }
+        }
+    };
+}
+
+struct Unit;
+impl_id!(Unit);
+
+#[tokio::test]
+async fn works() {
+    let query = r#"
+        query Unit {
+            id
+        }
+    "#;
+
+    let schema = RootNode::new(Unit, EmptyMutation::new(), EmptySubscription::new());
+    let (res, errs) = juniper::execute(query, None, &schema, &graphql_vars! {}, &())
+        .await
+        .unwrap();
+
+    assert_eq!(errs.len(), 0);
+    assert_eq!(res, graphql_value!({"id": 42}));
+}

tests/integration/src/lib.rs

@@ -11,6 +11,8 @@ mod explicit_null;
 #[cfg(test)]
 mod infallible_as_field_error;
 #[cfg(test)]
+mod inside_macro;
+#[cfg(test)]
 mod issue_371;
 #[cfg(test)]
 mod issue_372;