1 files changed, 25 insertions, 4 deletions
diff --git a/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/RecordTemplate.kt b/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/RecordTemplate.kt
index b588ca1398..bc3028c736 100644
--- a/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/RecordTemplate.kt
+++ b/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/RecordTemplate.kt
@@ -1,8 +1,11 @@
 {%- let rec = ci|get_record_definition(name) %}
 
+{%- if rec.has_fields() %}
+{%- call kt::docstring(rec, 0) %}
 data class {{ type_name }} (
     {%- for field in rec.fields() %}
-    var {{ field.name()|var_name }}: {{ field|type_name(ci) -}}
+    {%- call kt::docstring(field, 4) %}
+    {% if config.generate_immutable_records() %}val{% else %}var{% endif %} {{ field.name()|var_name }}: {{ field|type_name(ci) -}}
     {%- match field.default_value() %}
         {%- when Some with(literal) %} = {{ literal|render_literal(field, ci) }}
         {%- else %}
@@ -18,21 +21,39 @@ data class {{ type_name }} (
     {% endif %}
     companion object
 }
+{%- else -%}
+{%- call kt::docstring(rec, 0) %}
+class {{ type_name }} {
+    override fun equals(other: Any?): Boolean {
+        return other is {{ type_name }}
+    }
+
+    override fun hashCode(): Int {
+        return javaClass.hashCode()
+    }
+
+    companion object
+}
+{%- endif %}
 
 public object {{ rec|ffi_converter_name }}: FfiConverterRustBuffer<{{ type_name }}> {
     override fun read(buf: ByteBuffer): {{ type_name }} {
+        {%- if rec.has_fields() %}
         return {{ type_name }}(
         {%- for field in rec.fields() %}
             {{ field|read_fn }}(buf),
         {%- endfor %}
         )
+        {%- else %}
+        return {{ type_name }}()
+        {%- endif %}
     }
 
-    override fun allocationSize(value: {{ type_name }}) = (
+    override fun allocationSize(value: {{ type_name }}) = {%- if rec.has_fields() %} (
         {%- for field in rec.fields() %}
-            {{ field|allocation_size_fn }}(value.{{ field.name()|var_name }}){% if !loop.last %} +{% endif%}
+            {{ field|allocation_size_fn }}(value.{{ field.name()|var_name }}){% if !loop.last %} +{% endif %}
         {%- endfor %}
-    )
+    ) {%- else %} 0UL {%- endif %}
 
     override fun write(value: {{ type_name }}, buf: ByteBuffer) {
         {%- for field in rec.fields() %}