Test repr(packed) with an explicit alignment. (#794) (#797)

Author: obi1kenobi

src/adapter/tests.rs

@@ -5638,6 +5638,24 @@ fn struct_field_positions() {
             field_name: "z".into(),
             field_position: 3,
         },
+        Output {
+            struct_name: "ReprPackedWithAlignment".into(),
+            struct_type: "plain".into(),
+            field_name: "x".into(),
+            field_position: 1,
+        },
+        Output {
+            struct_name: "ReprPackedWithAlignment".into(),
+            struct_type: "plain".into(),
+            field_name: "y".into(),
+            field_position: 2,
+        },
+        Output {
+            struct_name: "ReprPackedWithAlignment".into(),
+            struct_type: "plain".into(),
+            field_name: "z".into(),
+            field_position: 3,
+        },
         Output {
             struct_name: "ReprCTupleStruct".into(),
             struct_type: "tuple".into(),
@@ -6048,6 +6066,12 @@ fn struct_repr_attributes() {
             attr_raw: "#[repr(packed)]".into(),
             attr_repr_kind: "packed".into(),
         },
+        Output {
+            name: "ReprPackedWithAlignment".into(),
+            attrs: vec!["#[repr(packed(2))]".into()],
+            attr_raw: "#[repr(packed(2))]".into(),
+            attr_repr_kind: "packed".into(),
+        },
         Output {
             name: "ReprCTupleStruct".into(),
             attrs: vec!["#[repr(C)]".into()],

test_crates/struct_fields_position/src/lib.rs

@@ -20,6 +20,13 @@ pub struct ReprPackedStruct {
     pub z: bool,
 }
 
+#[repr(packed(2))]
+pub struct ReprPackedWithAlignment {
+    pub x: i32,
+    pub y: bool,
+    pub z: String,
+}
+
 #[repr(C)]
 pub struct ReprCTupleStruct(pub i32, pub String, pub bool);