1 files changed, 41 insertions, 0 deletions
diff --git a/third_party/rust/fluent-fallback/src/generator.rs b/third_party/rust/fluent-fallback/src/generator.rs
new file mode 100644
index 0000000000..f13af63cfd
--- /dev/null
+++ b/third_party/rust/fluent-fallback/src/generator.rs
@@ -0,0 +1,41 @@
+use fluent_bundle::{FluentBundle, FluentError, FluentResource};
+use futures::Stream;
+use rustc_hash::FxHashSet;
+use std::borrow::Borrow;
+use unic_langid::LanguageIdentifier;
+
+use crate::types::ResourceId;
+
+pub type FluentBundleResult<R> = Result<FluentBundle<R>, (FluentBundle<R>, Vec<FluentError>)>;
+
+pub trait BundleIterator {
+    fn prefetch_sync(&mut self) {}
+}
+
+#[async_trait::async_trait(?Send)]
+pub trait BundleStream {
+    async fn prefetch_async(&mut self) {}
+}
+
+pub trait BundleGenerator {
+    type Resource: Borrow<FluentResource>;
+    type LocalesIter: Iterator<Item = LanguageIdentifier>;
+    type Iter: Iterator<Item = FluentBundleResult<Self::Resource>>;
+    type Stream: Stream<Item = FluentBundleResult<Self::Resource>>;
+
+    fn bundles_iter(
+        &self,
+        _locales: Self::LocalesIter,
+        _res_ids: FxHashSet<ResourceId>,
+    ) -> Self::Iter {
+        unimplemented!();
+    }
+
+    fn bundles_stream(
+        &self,
+        _locales: Self::LocalesIter,
+        _res_ids: FxHashSet<ResourceId>,
+    ) -> Self::Stream {
+        unimplemented!();
+    }
+}