1 files changed, 27 insertions, 0 deletions
diff --git a/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/OptionalTemplate.kt b/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/OptionalTemplate.kt
new file mode 100644
index 0000000000..56cb5f87a5
--- /dev/null
+++ b/third_party/rust/uniffi_bindgen/src/bindings/kotlin/templates/OptionalTemplate.kt
@@ -0,0 +1,27 @@
+{%- let inner_type_name = inner_type|type_name(ci) %}
+
+public object {{ ffi_converter_name }}: FfiConverterRustBuffer<{{ inner_type_name }}?> {
+    override fun read(buf: ByteBuffer): {{ inner_type_name }}? {
+        if (buf.get().toInt() == 0) {
+            return null
+        }
+        return {{ inner_type|read_fn }}(buf)
+    }
+
+    override fun allocationSize(value: {{ inner_type_name }}?): Int {
+        if (value == null) {
+            return 1
+        } else {
+            return 1 + {{ inner_type|allocation_size_fn }}(value)
+        }
+    }
+
+    override fun write(value: {{ inner_type_name }}?, buf: ByteBuffer) {
+        if (value == null) {
+            buf.put(0)
+        } else {
+            buf.put(1)
+            {{ inner_type|write_fn }}(value, buf)
+        }
+    }
+}