1 files changed, 97 insertions, 0 deletions
diff --git a/intl/icu_capi/cpp/include/ICU4XLocaleFallbacker.hpp b/intl/icu_capi/cpp/include/ICU4XLocaleFallbacker.hpp
new file mode 100644
index 0000000000..707ddce386
--- /dev/null
+++ b/intl/icu_capi/cpp/include/ICU4XLocaleFallbacker.hpp
@@ -0,0 +1,97 @@
+#ifndef ICU4XLocaleFallbacker_HPP
+#define ICU4XLocaleFallbacker_HPP
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <algorithm>
+#include <memory>
+#include <variant>
+#include <optional>
+#include "diplomat_runtime.hpp"
+
+#include "ICU4XLocaleFallbacker.h"
+
+class ICU4XDataProvider;
+class ICU4XLocaleFallbacker;
+#include "ICU4XError.hpp"
+struct ICU4XLocaleFallbackConfig;
+class ICU4XLocaleFallbackerWithConfig;
+
+/**
+ * A destruction policy for using ICU4XLocaleFallbacker with std::unique_ptr.
+ */
+struct ICU4XLocaleFallbackerDeleter {
+  void operator()(capi::ICU4XLocaleFallbacker* l) const noexcept {
+    capi::ICU4XLocaleFallbacker_destroy(l);
+  }
+};
+
+/**
+ * An object that runs the ICU4X locale fallback algorithm.
+ * 
+ * See the [Rust documentation for `LocaleFallbacker`](https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html) for more information.
+ */
+class ICU4XLocaleFallbacker {
+ public:
+
+  /**
+   * Creates a new `ICU4XLocaleFallbacker` from a data provider.
+   * 
+   * See the [Rust documentation for `new`](https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html#method.new) for more information.
+   */
+  static diplomat::result<ICU4XLocaleFallbacker, ICU4XError> create(const ICU4XDataProvider& provider);
+
+  /**
+   * Creates a new `ICU4XLocaleFallbacker` without data for limited functionality.
+   * 
+   * See the [Rust documentation for `new_without_data`](https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html#method.new_without_data) for more information.
+   */
+  static ICU4XLocaleFallbacker create_without_data();
+
+  /**
+   * Associates this `ICU4XLocaleFallbacker` with configuration options.
+   * 
+   * See the [Rust documentation for `for_config`](https://docs.rs/icu/latest/icu/locid_transform/fallback/struct.LocaleFallbacker.html#method.for_config) for more information.
+   * 
+   * Lifetimes: `this` must live at least as long as the output.
+   */
+  diplomat::result<ICU4XLocaleFallbackerWithConfig, ICU4XError> for_config(ICU4XLocaleFallbackConfig config) const;
+  inline const capi::ICU4XLocaleFallbacker* AsFFI() const { return this->inner.get(); }
+  inline capi::ICU4XLocaleFallbacker* AsFFIMut() { return this->inner.get(); }
+  inline explicit ICU4XLocaleFallbacker(capi::ICU4XLocaleFallbacker* i) : inner(i) {}
+  ICU4XLocaleFallbacker() = default;
+  ICU4XLocaleFallbacker(ICU4XLocaleFallbacker&&) noexcept = default;
+  ICU4XLocaleFallbacker& operator=(ICU4XLocaleFallbacker&& other) noexcept = default;
+ private:
+  std::unique_ptr<capi::ICU4XLocaleFallbacker, ICU4XLocaleFallbackerDeleter> inner;
+};
+
+#include "ICU4XDataProvider.hpp"
+#include "ICU4XLocaleFallbackConfig.hpp"
+#include "ICU4XLocaleFallbackerWithConfig.hpp"
+
+inline diplomat::result<ICU4XLocaleFallbacker, ICU4XError> ICU4XLocaleFallbacker::create(const ICU4XDataProvider& provider) {
+  auto diplomat_result_raw_out_value = capi::ICU4XLocaleFallbacker_create(provider.AsFFI());
+  diplomat::result<ICU4XLocaleFallbacker, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok<ICU4XLocaleFallbacker>(ICU4XLocaleFallbacker(diplomat_result_raw_out_value.ok));
+  } else {
+    diplomat_result_out_value = diplomat::Err<ICU4XError>(static_cast<ICU4XError>(diplomat_result_raw_out_value.err));
+  }
+  return diplomat_result_out_value;
+}
+inline ICU4XLocaleFallbacker ICU4XLocaleFallbacker::create_without_data() {
+  return ICU4XLocaleFallbacker(capi::ICU4XLocaleFallbacker_create_without_data());
+}
+inline diplomat::result<ICU4XLocaleFallbackerWithConfig, ICU4XError> ICU4XLocaleFallbacker::for_config(ICU4XLocaleFallbackConfig config) const {
+  ICU4XLocaleFallbackConfig diplomat_wrapped_struct_config = config;
+  auto diplomat_result_raw_out_value = capi::ICU4XLocaleFallbacker_for_config(this->inner.get(), capi::ICU4XLocaleFallbackConfig{ .priority = static_cast<capi::ICU4XLocaleFallbackPriority>(diplomat_wrapped_struct_config.priority), .extension_key = { diplomat_wrapped_struct_config.extension_key.data(), diplomat_wrapped_struct_config.extension_key.size() }, .fallback_supplement = static_cast<capi::ICU4XLocaleFallbackSupplement>(diplomat_wrapped_struct_config.fallback_supplement) });
+  diplomat::result<ICU4XLocaleFallbackerWithConfig, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok<ICU4XLocaleFallbackerWithConfig>(ICU4XLocaleFallbackerWithConfig(diplomat_result_raw_out_value.ok));
+  } else {
+    diplomat_result_out_value = diplomat::Err<ICU4XError>(static_cast<ICU4XError>(diplomat_result_raw_out_value.err));
+  }
+  return diplomat_result_out_value;
+}
+#endif