Commit 3d1732ef6c

@@ -6592,6 +6592,7 @@ static void get_c_type(CodeGen *g, GenH *gen_h, TypeTableEntry *type_entry, Buf
                 }
             }
         case TypeTableEntryIdStruct:
+        case TypeTableEntryIdOpaque:
             {
                 buf_init_from_str(out_buf, "struct ");
                 buf_append_buf(out_buf, &type_entry->name);
@@ -6609,11 +6610,6 @@ static void get_c_type(CodeGen *g, GenH *gen_h, TypeTableEntry *type_entry, Buf
                 buf_append_buf(out_buf, &type_entry->name);
                 return;
             }
-        case TypeTableEntryIdOpaque:
-            {
-                buf_init_from_buf(out_buf, &type_entry->name);
-                return;
-            }
         case TypeTableEntryIdArray:
             {
                 TypeTableEntryArray *array_data = &type_entry->data.array;

@@ -51,6 +51,16 @@ pub fn addCases(cases: &tests.GenHContext) void {
         \\
     );
 
+    cases.add("declare opaque type",
+        \\export const Foo = @OpaqueType();
+        \\
+        \\export fn entry(foo: ?&Foo) void { }
+    ,
+        \\struct Foo;
+        \\
+        \\TEST_EXPORT void entry(struct Foo * foo);
+    );
+
     cases.add("array field-type",
         \\const Foo = extern struct {
         \\    A: [2]i32,
@@ -66,4 +76,5 @@ pub fn addCases(cases: &tests.GenHContext) void {
         \\TEST_EXPORT void entry(struct Foo foo, uint8_t bar[]);
         \\
     );
+
 }