Remove conflict between flatten and skip

test_suite/tests/test_gen.rs

@@ -665,6 +665,25 @@ fn test_gen() {
         ty: &'a str,
         id: String,
     }
+
+    #[derive(Serialize, Deserialize)]
+    struct FlattenSkipSerializing<T> {
+        #[serde(flatten, skip_serializing)]
+        #[allow(dead_code)]
+        flat: T,
+    }
+
+    #[derive(Serialize, Deserialize)]
+    struct FlattenSkipSerializingIf<T> {
+        #[serde(flatten, skip_serializing_if = "StdOption::is_none")]
+        flat: StdOption<T>,
+    }
+
+    #[derive(Serialize, Deserialize)]
+    struct FlattenSkipDeserializing<T> {
+        #[serde(flatten, skip_deserializing)]
+        flat: T,
+    }
 }
 
 //////////////////////////////////////////////////////////////////////////

test_suite/tests/ui/conflict/flatten-skip-deserializing.rs

@@ -1,14 +0,0 @@
-use serde_derive::Deserialize;
-
-#[derive(Deserialize)]
-struct Foo {
-    #[serde(flatten, skip_deserializing)]
-    other: Other,
-}
-
-#[derive(Deserialize)]
-struct Other {
-    x: u32,
-}
-
-fn main() {}

test_suite/tests/ui/conflict/flatten-skip-deserializing.stderr

@@ -1,9 +0,0 @@
-error: #[serde(flatten)] can not be combined with #[serde(skip_deserializing)]
- --> $DIR/flatten-skip-deserializing.rs:5:5
-  |
-5 | /     #[serde(flatten, skip_deserializing)]
-6 | |     other: Other,
-  | |________________^
-
-error: aborting due to previous error
-

test_suite/tests/ui/conflict/flatten-skip-serializing-if.rs

@@ -1,14 +0,0 @@
-use serde_derive::Serialize;
-
-#[derive(Serialize)]
-struct Foo {
-    #[serde(flatten, skip_serializing_if = "Option::is_none")]
-    other: Option<Other>,
-}
-
-#[derive(Serialize)]
-struct Other {
-    x: u32,
-}
-
-fn main() {}

test_suite/tests/ui/conflict/flatten-skip-serializing-if.stderr

@@ -1,9 +0,0 @@
-error: #[serde(flatten)] can not be combined with #[serde(skip_serializing_if = "...")]
- --> $DIR/flatten-skip-serializing-if.rs:5:5
-  |
-5 | /     #[serde(flatten, skip_serializing_if = "Option::is_none")]
-6 | |     other: Option<Other>,
-  | |________________________^
-
-error: aborting due to previous error
-

test_suite/tests/ui/conflict/flatten-skip-serializing.rs

@@ -1,14 +0,0 @@
-use serde_derive::Serialize;
-
-#[derive(Serialize)]
-struct Foo {
-    #[serde(flatten, skip_serializing)]
-    other: Other,
-}
-
-#[derive(Serialize)]
-struct Other {
-    x: u32,
-}
-
-fn main() {}

test_suite/tests/ui/conflict/flatten-skip-serializing.stderr

@@ -1,9 +0,0 @@
-error: #[serde(flatten)] can not be combined with #[serde(skip_serializing)]
- --> $DIR/flatten-skip-serializing.rs:5:5
-  |
-5 | /     #[serde(flatten, skip_serializing)]
-6 | |     other: Other,
-  | |________________^
-
-error: aborting due to previous error
-