Add package name to RustBufferI if it needs it

bindgen/src/gen_go/mod.rs

@@ -465,11 +465,14 @@ pub mod filters {
     }
 
     /// FFI type name to be used to reference cgo types
-    pub fn ffi_type_name<T: Clone + Into<FfiType>>(type_: &T) -> Result<String, askama::Error> {
+    pub fn ffi_type_name(type_: &Type) -> Result<String, askama::Error> {
         let ffi_type: FfiType = type_.clone().into();
         let result = match ffi_type {
             FfiType::RustArcPtr(_) => "unsafe.Pointer".into(),
-            FfiType::RustBuffer(_) => "RustBufferI".into(),
+            FfiType::RustBuffer(_) => match type_ {
+                Type::External { namespace, .. } => format!("{}.RustBufferI", namespace),
+                _ => "RustBufferI".into(),
+            },
             _ => format!("C.{}", oracle().ffi_type_label(&ffi_type)),
         };
         Ok(result)

binding_tests/issue43_test.go

@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package binding_tests
+
+import (
+	"testing"
+
+	"github.com/NordSecurity/uniffi-bindgen-go/binding_tests/generated/issue43"
+	"github.com/stretchr/testify/assert"
+)
+
+// Ensure you can call async functions which return types in a different package.
+// See https://github.com/NordSecurity/uniffi-bindgen-go/issues/43
+
+func TestIssue43(t *testing.T) {
+	record := issue43.GetAsyncExternalType()
+	assert.Equal(t, record.Id, "foo")
+	assert.Equal(t, record.Tag, "bar")
+}

fixtures/Cargo.toml

@@ -41,4 +41,5 @@ uniffi-go-fixture-destroy = { path = "destroy" }
 uniffi-go-fixture-errors = { path = "errors" }
 uniffi-go-fixture-name-case = { path = "name-case" }
 uniffi-go-fixture-objects = { path = "objects" }
+uniffi-go-fixture-issue43 = { path = "regressions/issue43" }
 uniffi-go-fixture-issue45 = { path = "regressions/issue45" }

fixtures/regressions/issue43/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "uniffi-go-fixture-issue43"
+version = "1.0.0"
+edition = "2021"
+publish = false
+
+[lib]
+crate-type = ["lib", "cdylib"]
+name = "uniffi_go_issue43"
+
+[dependencies]
+uniffi = {path = "../../../3rd-party/uniffi-rs/uniffi"}
+uniffi_macros = {path = "../../../3rd-party/uniffi-rs/uniffi_macros"}
+uniffi-go-fixture-issue45 = {path = "../issue45"}
+
+[build-dependencies]
+uniffi_build = {path = "../../../3rd-party/uniffi-rs/uniffi_build", features=["builtin-bindgen"]}

fixtures/regressions/issue43/build.rs

@@ -0,0 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+fn main() {
+    uniffi_build::generate_scaffolding("./src/issue43.udl").unwrap();
+}

fixtures/regressions/issue43/src/issue43.udl

@@ -0,0 +1 @@
+namespace issue43 {};

fixtures/regressions/issue43/src/lib.rs

@@ -0,0 +1,13 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#[uniffi::export]
+async fn get_async_external_type() -> uniffi_go_issue45::Record {
+    uniffi_go_issue45::Record {
+        id: "foo".to_string(),
+        tag: "bar".to_string(),
+    }
+}
+
+include!(concat!(env!("OUT_DIR"), "/issue43.uniffi.rs"));

fixtures/regressions/issue45/src/lib.rs

@@ -3,9 +3,9 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #[derive(uniffi::Record)]
-struct Record {
-    id: String,
-    tag: String,
+pub struct Record {
+    pub id: String,
+    pub tag: String,
 }
 
 // Ensure multiple futures packages work fine together, the other one being

fixtures/src/lib.rs

@@ -37,6 +37,7 @@ mod uniffi_fixtures {
     // Go specific
     uniffi_go_destroy::uniffi_reexport_scaffolding!();
     uniffi_go_errors::uniffi_reexport_scaffolding!();
+    uniffi_go_issue43::uniffi_reexport_scaffolding!();
     uniffi_go_issue45::uniffi_reexport_scaffolding!();
     uniffi_go_name_case::uniffi_reexport_scaffolding!();
     uniffi_go_objects::uniffi_reexport_scaffolding!();