1 files changed, 145 insertions, 0 deletions
diff --git a/intl/icu_capi/cpp/include/ICU4XGregorianDateFormatter.hpp b/intl/icu_capi/cpp/include/ICU4XGregorianDateFormatter.hpp
new file mode 100644
index 0000000000..01b8c95015
--- /dev/null
+++ b/intl/icu_capi/cpp/include/ICU4XGregorianDateFormatter.hpp
@@ -0,0 +1,145 @@
+#ifndef ICU4XGregorianDateFormatter_HPP
+#define ICU4XGregorianDateFormatter_HPP
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <algorithm>
+#include <memory>
+#include <variant>
+#include <optional>
+#include "diplomat_runtime.hpp"
+
+#include "ICU4XGregorianDateFormatter.h"
+
+class ICU4XDataProvider;
+class ICU4XLocale;
+#include "ICU4XDateLength.hpp"
+class ICU4XGregorianDateFormatter;
+#include "ICU4XError.hpp"
+class ICU4XIsoDate;
+class ICU4XIsoDateTime;
+
+/**
+ * A destruction policy for using ICU4XGregorianDateFormatter with std::unique_ptr.
+ */
+struct ICU4XGregorianDateFormatterDeleter {
+  void operator()(capi::ICU4XGregorianDateFormatter* l) const noexcept {
+    capi::ICU4XGregorianDateFormatter_destroy(l);
+  }
+};
+
+/**
+ * An ICU4X TypedDateFormatter object capable of formatting a [`ICU4XIsoDateTime`] as a string,
+ * using the Gregorian Calendar.
+ * 
+ * See the [Rust documentation for `TypedDateFormatter`](https://docs.rs/icu/latest/icu/datetime/struct.TypedDateFormatter.html) for more information.
+ */
+class ICU4XGregorianDateFormatter {
+ public:
+
+  /**
+   * Creates a new [`ICU4XGregorianDateFormatter`] from locale data.
+   * 
+   * See the [Rust documentation for `try_new_with_length`](https://docs.rs/icu/latest/icu/datetime/struct.TypedDateFormatter.html#method.try_new_with_length) for more information.
+   */
+  static diplomat::result<ICU4XGregorianDateFormatter, ICU4XError> create_with_length(const ICU4XDataProvider& provider, const ICU4XLocale& locale, ICU4XDateLength length);
+
+  /**
+   * Formats a [`ICU4XIsoDate`] to a string.
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.TypedDateFormatter.html#method.format) for more information.
+   */
+  template<typename W> diplomat::result<std::monostate, ICU4XError> format_iso_date_to_writeable(const ICU4XIsoDate& value, W& write) const;
+
+  /**
+   * Formats a [`ICU4XIsoDate`] to a string.
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.TypedDateFormatter.html#method.format) for more information.
+   */
+  diplomat::result<std::string, ICU4XError> format_iso_date(const ICU4XIsoDate& value) const;
+
+  /**
+   * Formats a [`ICU4XIsoDateTime`] to a string.
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.TypedDateFormatter.html#method.format) for more information.
+   */
+  template<typename W> diplomat::result<std::monostate, ICU4XError> format_iso_datetime_to_writeable(const ICU4XIsoDateTime& value, W& write) const;
+
+  /**
+   * Formats a [`ICU4XIsoDateTime`] to a string.
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.TypedDateFormatter.html#method.format) for more information.
+   */
+  diplomat::result<std::string, ICU4XError> format_iso_datetime(const ICU4XIsoDateTime& value) const;
+  inline const capi::ICU4XGregorianDateFormatter* AsFFI() const { return this->inner.get(); }
+  inline capi::ICU4XGregorianDateFormatter* AsFFIMut() { return this->inner.get(); }
+  inline ICU4XGregorianDateFormatter(capi::ICU4XGregorianDateFormatter* i) : inner(i) {}
+  ICU4XGregorianDateFormatter() = default;
+  ICU4XGregorianDateFormatter(ICU4XGregorianDateFormatter&&) noexcept = default;
+  ICU4XGregorianDateFormatter& operator=(ICU4XGregorianDateFormatter&& other) noexcept = default;
+ private:
+  std::unique_ptr<capi::ICU4XGregorianDateFormatter, ICU4XGregorianDateFormatterDeleter> inner;
+};
+
+#include "ICU4XDataProvider.hpp"
+#include "ICU4XLocale.hpp"
+#include "ICU4XIsoDate.hpp"
+#include "ICU4XIsoDateTime.hpp"
+
+inline diplomat::result<ICU4XGregorianDateFormatter, ICU4XError> ICU4XGregorianDateFormatter::create_with_length(const ICU4XDataProvider& provider, const ICU4XLocale& locale, ICU4XDateLength length) {
+  auto diplomat_result_raw_out_value = capi::ICU4XGregorianDateFormatter_create_with_length(provider.AsFFI(), locale.AsFFI(), static_cast<capi::ICU4XDateLength>(length));
+  diplomat::result<ICU4XGregorianDateFormatter, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok<ICU4XGregorianDateFormatter>(ICU4XGregorianDateFormatter(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;
+}
+template<typename W> inline diplomat::result<std::monostate, ICU4XError> ICU4XGregorianDateFormatter::format_iso_date_to_writeable(const ICU4XIsoDate& value, W& write) const {
+  capi::DiplomatWriteable write_writer = diplomat::WriteableTrait<W>::Construct(write);
+  auto diplomat_result_raw_out_value = capi::ICU4XGregorianDateFormatter_format_iso_date(this->inner.get(), value.AsFFI(), &write_writer);
+  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::string, ICU4XError> ICU4XGregorianDateFormatter::format_iso_date(const ICU4XIsoDate& value) const {
+  std::string diplomat_writeable_string;
+  capi::DiplomatWriteable diplomat_writeable_out = diplomat::WriteableFromString(diplomat_writeable_string);
+  auto diplomat_result_raw_out_value = capi::ICU4XGregorianDateFormatter_format_iso_date(this->inner.get(), value.AsFFI(), &diplomat_writeable_out);
+  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.replace_ok(std::move(diplomat_writeable_string));
+}
+template<typename W> inline diplomat::result<std::monostate, ICU4XError> ICU4XGregorianDateFormatter::format_iso_datetime_to_writeable(const ICU4XIsoDateTime& value, W& write) const {
+  capi::DiplomatWriteable write_writer = diplomat::WriteableTrait<W>::Construct(write);
+  auto diplomat_result_raw_out_value = capi::ICU4XGregorianDateFormatter_format_iso_datetime(this->inner.get(), value.AsFFI(), &write_writer);
+  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::string, ICU4XError> ICU4XGregorianDateFormatter::format_iso_datetime(const ICU4XIsoDateTime& value) const {
+  std::string diplomat_writeable_string;
+  capi::DiplomatWriteable diplomat_writeable_out = diplomat::WriteableFromString(diplomat_writeable_string);
+  auto diplomat_result_raw_out_value = capi::ICU4XGregorianDateFormatter_format_iso_datetime(this->inner.get(), value.AsFFI(), &diplomat_writeable_out);
+  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.replace_ok(std::move(diplomat_writeable_string));
+}
+#endif