1 files changed, 196 insertions, 0 deletions
diff --git a/intl/icu_capi/cpp/include/ICU4XDataProvider.hpp b/intl/icu_capi/cpp/include/ICU4XDataProvider.hpp
new file mode 100644
index 0000000000..b007076aca
--- /dev/null
+++ b/intl/icu_capi/cpp/include/ICU4XDataProvider.hpp
@@ -0,0 +1,196 @@
+#ifndef ICU4XDataProvider_HPP
+#define ICU4XDataProvider_HPP
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <algorithm>
+#include <memory>
+#include <variant>
+#include <optional>
+#include "diplomat_runtime.hpp"
+
+#include "ICU4XDataProvider.h"
+
+class ICU4XDataProvider;
+#include "ICU4XError.hpp"
+class ICU4XLocaleFallbacker;
+
+/**
+ * A destruction policy for using ICU4XDataProvider with std::unique_ptr.
+ */
+struct ICU4XDataProviderDeleter {
+  void operator()(capi::ICU4XDataProvider* l) const noexcept {
+    capi::ICU4XDataProvider_destroy(l);
+  }
+};
+
+/**
+ * An ICU4X data provider, capable of loading ICU4X data keys from some source.
+ * 
+ * See the [Rust documentation for `icu_provider`](https://docs.rs/icu_provider/latest/icu_provider/index.html) for more information.
+ */
+class ICU4XDataProvider {
+ public:
+
+  /**
+   * Constructs an [`ICU4XDataProvider`] that uses compiled data.
+   * 
+   * Requires the `compiled_data` feature.
+   * 
+   * This provider cannot be modified or combined with other providers, so `enable_fallback`,
+   * `enabled_fallback_with`, `fork_by_locale`, and `fork_by_key` will return `Err`s.
+   */
+  static ICU4XDataProvider create_compiled();
+
+  /**
+   * Constructs an `FsDataProvider` and returns it as an [`ICU4XDataProvider`].
+   * Requires the `provider_fs` Cargo feature.
+   * Not supported in WASM.
+   * 
+   * See the [Rust documentation for `FsDataProvider`](https://docs.rs/icu_provider_fs/latest/icu_provider_fs/struct.FsDataProvider.html) for more information.
+   */
+  static diplomat::result<ICU4XDataProvider, ICU4XError> create_fs(const std::string_view path);
+
+  /**
+   * Deprecated
+   * 
+   * Use `create_compiled()`.
+   */
+  static ICU4XDataProvider create_test();
+
+  /**
+   * Constructs a `BlobDataProvider` and returns it as an [`ICU4XDataProvider`].
+   * 
+   * See the [Rust documentation for `BlobDataProvider`](https://docs.rs/icu_provider_blob/latest/icu_provider_blob/struct.BlobDataProvider.html) for more information.
+   * 
+   * Lifetimes: `blob` must live for the duration of the program.
+   */
+  static diplomat::result<ICU4XDataProvider, ICU4XError> create_from_byte_slice(const diplomat::span<const uint8_t> blob);
+
+  /**
+   * Constructs an empty [`ICU4XDataProvider`].
+   * 
+   * See the [Rust documentation for `EmptyDataProvider`](https://docs.rs/icu_provider_adapters/latest/icu_provider_adapters/empty/struct.EmptyDataProvider.html) for more information.
+   */
+  static ICU4XDataProvider create_empty();
+
+  /**
+   * Creates a provider that tries the current provider and then, if the current provider
+   * doesn't support the data key, another provider `other`.
+   * 
+   * This takes ownership of the `other` provider, leaving an empty provider in its place.
+   * 
+   * The providers must be the same type (Any or Buffer). This condition is satisfied if
+   * both providers originate from the same constructor, such as `create_from_byte_slice`
+   * or `create_fs`. If the condition is not upheld, a runtime error occurs.
+   * 
+   * See the [Rust documentation for `ForkByKeyProvider`](https://docs.rs/icu_provider_adapters/latest/icu_provider_adapters/fork/type.ForkByKeyProvider.html) for more information.
+   */
+  diplomat::result<std::monostate, ICU4XError> fork_by_key(ICU4XDataProvider& other);
+
+  /**
+   * Same as `fork_by_key` but forks by locale instead of key.
+   * 
+   * See the [Rust documentation for `MissingLocalePredicate`](https://docs.rs/icu_provider_adapters/latest/icu_provider_adapters/fork/predicates/struct.MissingLocalePredicate.html) for more information.
+   */
+  diplomat::result<std::monostate, ICU4XError> fork_by_locale(ICU4XDataProvider& other);
+
+  /**
+   * Enables locale fallbacking for data requests made to this provider.
+   * 
+   * Note that the test provider (from `create_test`) already has fallbacking enabled.
+   * 
+   * See the [Rust documentation for `try_new`](https://docs.rs/icu_provider_adapters/latest/icu_provider_adapters/fallback/struct.LocaleFallbackProvider.html#method.try_new) for more information.
+   * 
+   * Additional information: [1](https://docs.rs/icu_provider_adapters/latest/icu_provider_adapters/fallback/struct.LocaleFallbackProvider.html)
+   */
+  diplomat::result<std::monostate, ICU4XError> enable_locale_fallback();
+
+  /**
+   * See the [Rust documentation for `new_with_fallbacker`](https://docs.rs/icu_provider_adapters/latest/icu_provider_adapters/fallback/struct.LocaleFallbackProvider.html#method.new_with_fallbacker) for more information.
+   * 
+   * Additional information: [1](https://docs.rs/icu_provider_adapters/latest/icu_provider_adapters/fallback/struct.LocaleFallbackProvider.html)
+   */
+  diplomat::result<std::monostate, ICU4XError> enable_locale_fallback_with(const ICU4XLocaleFallbacker& fallbacker);
+  inline const capi::ICU4XDataProvider* AsFFI() const { return this->inner.get(); }
+  inline capi::ICU4XDataProvider* AsFFIMut() { return this->inner.get(); }
+  inline explicit ICU4XDataProvider(capi::ICU4XDataProvider* i) : inner(i) {}
+  ICU4XDataProvider() = default;
+  ICU4XDataProvider(ICU4XDataProvider&&) noexcept = default;
+  ICU4XDataProvider& operator=(ICU4XDataProvider&& other) noexcept = default;
+ private:
+  std::unique_ptr<capi::ICU4XDataProvider, ICU4XDataProviderDeleter> inner;
+};
+
+#include "ICU4XLocaleFallbacker.hpp"
+
+inline ICU4XDataProvider ICU4XDataProvider::create_compiled() {
+  return ICU4XDataProvider(capi::ICU4XDataProvider_create_compiled());
+}
+inline diplomat::result<ICU4XDataProvider, ICU4XError> ICU4XDataProvider::create_fs(const std::string_view path) {
+  auto diplomat_result_raw_out_value = capi::ICU4XDataProvider_create_fs(path.data(), path.size());
+  diplomat::result<ICU4XDataProvider, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok<ICU4XDataProvider>(ICU4XDataProvider(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 ICU4XDataProvider ICU4XDataProvider::create_test() {
+  return ICU4XDataProvider(capi::ICU4XDataProvider_create_test());
+}
+inline diplomat::result<ICU4XDataProvider, ICU4XError> ICU4XDataProvider::create_from_byte_slice(const diplomat::span<const uint8_t> blob) {
+  auto diplomat_result_raw_out_value = capi::ICU4XDataProvider_create_from_byte_slice(blob.data(), blob.size());
+  diplomat::result<ICU4XDataProvider, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok<ICU4XDataProvider>(ICU4XDataProvider(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 ICU4XDataProvider ICU4XDataProvider::create_empty() {
+  return ICU4XDataProvider(capi::ICU4XDataProvider_create_empty());
+}
+inline diplomat::result<std::monostate, ICU4XError> ICU4XDataProvider::fork_by_key(ICU4XDataProvider& other) {
+  auto diplomat_result_raw_out_value = capi::ICU4XDataProvider_fork_by_key(this->inner.get(), other.AsFFIMut());
+  diplomat::result<std::monostate, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok(std::monostate());
+  } else {
+    diplomat_result_out_value = diplomat::Err<ICU4XError>(static_cast<ICU4XError>(diplomat_result_raw_out_value.err));
+  }
+  return diplomat_result_out_value;
+}
+inline diplomat::result<std::monostate, ICU4XError> ICU4XDataProvider::fork_by_locale(ICU4XDataProvider& other) {
+  auto diplomat_result_raw_out_value = capi::ICU4XDataProvider_fork_by_locale(this->inner.get(), other.AsFFIMut());
+  diplomat::result<std::monostate, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok(std::monostate());
+  } else {
+    diplomat_result_out_value = diplomat::Err<ICU4XError>(static_cast<ICU4XError>(diplomat_result_raw_out_value.err));
+  }
+  return diplomat_result_out_value;
+}
+inline diplomat::result<std::monostate, ICU4XError> ICU4XDataProvider::enable_locale_fallback() {
+  auto diplomat_result_raw_out_value = capi::ICU4XDataProvider_enable_locale_fallback(this->inner.get());
+  diplomat::result<std::monostate, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok(std::monostate());
+  } else {
+    diplomat_result_out_value = diplomat::Err<ICU4XError>(static_cast<ICU4XError>(diplomat_result_raw_out_value.err));
+  }
+  return diplomat_result_out_value;
+}
+inline diplomat::result<std::monostate, ICU4XError> ICU4XDataProvider::enable_locale_fallback_with(const ICU4XLocaleFallbacker& fallbacker) {
+  auto diplomat_result_raw_out_value = capi::ICU4XDataProvider_enable_locale_fallback_with(this->inner.get(), fallbacker.AsFFI());
+  diplomat::result<std::monostate, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok(std::monostate());
+  } else {
+    diplomat_result_out_value = diplomat::Err<ICU4XError>(static_cast<ICU4XError>(diplomat_result_raw_out_value.err));
+  }
+  return diplomat_result_out_value;
+}
+#endif