1 files changed, 231 insertions, 0 deletions
diff --git a/intl/icu_capi/cpp/include/ICU4XDateFormatter.hpp b/intl/icu_capi/cpp/include/ICU4XDateFormatter.hpp
new file mode 100644
index 0000000000..13525b0cc6
--- /dev/null
+++ b/intl/icu_capi/cpp/include/ICU4XDateFormatter.hpp
@@ -0,0 +1,231 @@
+#ifndef ICU4XDateFormatter_HPP
+#define ICU4XDateFormatter_HPP
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <algorithm>
+#include <memory>
+#include <variant>
+#include <optional>
+#include "diplomat_runtime.hpp"
+
+#include "ICU4XDateFormatter.h"
+
+class ICU4XDataProvider;
+class ICU4XLocale;
+#include "ICU4XDateLength.hpp"
+class ICU4XDateFormatter;
+#include "ICU4XError.hpp"
+class ICU4XDate;
+class ICU4XIsoDate;
+class ICU4XDateTime;
+class ICU4XIsoDateTime;
+
+/**
+ * A destruction policy for using ICU4XDateFormatter with std::unique_ptr.
+ */
+struct ICU4XDateFormatterDeleter {
+  void operator()(capi::ICU4XDateFormatter* l) const noexcept {
+    capi::ICU4XDateFormatter_destroy(l);
+  }
+};
+
+/**
+ * An ICU4X DateFormatter object capable of formatting a [`ICU4XDate`] as a string,
+ * using some calendar specified at runtime in the locale.
+ * 
+ * See the [Rust documentation for `DateFormatter`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.html) for more information.
+ */
+class ICU4XDateFormatter {
+ public:
+
+  /**
+   * Creates a new [`ICU4XDateFormatter`] from locale data.
+   * 
+   * See the [Rust documentation for `try_new_with_length`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.html#method.try_new_with_length) for more information.
+   */
+  static diplomat::result<ICU4XDateFormatter, ICU4XError> create_with_length(const ICU4XDataProvider& provider, const ICU4XLocale& locale, ICU4XDateLength date_length);
+
+  /**
+   * Formats a [`ICU4XDate`] to a string.
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.html#method.format) for more information.
+   */
+  template<typename W> diplomat::result<std::monostate, ICU4XError> format_date_to_writeable(const ICU4XDate& value, W& write) const;
+
+  /**
+   * Formats a [`ICU4XDate`] to a string.
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.html#method.format) for more information.
+   */
+  diplomat::result<std::string, ICU4XError> format_date(const ICU4XDate& value) const;
+
+  /**
+   * Formats a [`ICU4XIsoDate`] to a string.
+   * 
+   * Will convert to this formatter's calendar first
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.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.
+   * 
+   * Will convert to this formatter's calendar first
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.html#method.format) for more information.
+   */
+  diplomat::result<std::string, ICU4XError> format_iso_date(const ICU4XIsoDate& value) const;
+
+  /**
+   * Formats a [`ICU4XDateTime`] to a string.
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.html#method.format) for more information.
+   */
+  template<typename W> diplomat::result<std::monostate, ICU4XError> format_datetime_to_writeable(const ICU4XDateTime& value, W& write) const;
+
+  /**
+   * Formats a [`ICU4XDateTime`] to a string.
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.html#method.format) for more information.
+   */
+  diplomat::result<std::string, ICU4XError> format_datetime(const ICU4XDateTime& value) const;
+
+  /**
+   * Formats a [`ICU4XIsoDateTime`] to a string.
+   * 
+   * Will convert to this formatter's calendar first
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.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.
+   * 
+   * Will convert to this formatter's calendar first
+   * 
+   * See the [Rust documentation for `format`](https://docs.rs/icu/latest/icu/datetime/struct.DateFormatter.html#method.format) for more information.
+   */
+  diplomat::result<std::string, ICU4XError> format_iso_datetime(const ICU4XIsoDateTime& value) const;
+  inline const capi::ICU4XDateFormatter* AsFFI() const { return this->inner.get(); }
+  inline capi::ICU4XDateFormatter* AsFFIMut() { return this->inner.get(); }
+  inline ICU4XDateFormatter(capi::ICU4XDateFormatter* i) : inner(i) {}
+  ICU4XDateFormatter() = default;
+  ICU4XDateFormatter(ICU4XDateFormatter&&) noexcept = default;
+  ICU4XDateFormatter& operator=(ICU4XDateFormatter&& other) noexcept = default;
+ private:
+  std::unique_ptr<capi::ICU4XDateFormatter, ICU4XDateFormatterDeleter> inner;
+};
+
+#include "ICU4XDataProvider.hpp"
+#include "ICU4XLocale.hpp"
+#include "ICU4XDate.hpp"
+#include "ICU4XIsoDate.hpp"
+#include "ICU4XDateTime.hpp"
+#include "ICU4XIsoDateTime.hpp"
+
+inline diplomat::result<ICU4XDateFormatter, ICU4XError> ICU4XDateFormatter::create_with_length(const ICU4XDataProvider& provider, const ICU4XLocale& locale, ICU4XDateLength date_length) {
+  auto diplomat_result_raw_out_value = capi::ICU4XDateFormatter_create_with_length(provider.AsFFI(), locale.AsFFI(), static_cast<capi::ICU4XDateLength>(date_length));
+  diplomat::result<ICU4XDateFormatter, ICU4XError> diplomat_result_out_value;
+  if (diplomat_result_raw_out_value.is_ok) {
+    diplomat_result_out_value = diplomat::Ok<ICU4XDateFormatter>(ICU4XDateFormatter(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> ICU4XDateFormatter::format_date_to_writeable(const ICU4XDate& value, W& write) const {
+  capi::DiplomatWriteable write_writer = diplomat::WriteableTrait<W>::Construct(write);
+  auto diplomat_result_raw_out_value = capi::ICU4XDateFormatter_format_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> ICU4XDateFormatter::format_date(const ICU4XDate& value) const {
+  std::string diplomat_writeable_string;
+  capi::DiplomatWriteable diplomat_writeable_out = diplomat::WriteableFromString(diplomat_writeable_string);
+  auto diplomat_result_raw_out_value = capi::ICU4XDateFormatter_format_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> ICU4XDateFormatter::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::ICU4XDateFormatter_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> ICU4XDateFormatter::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::ICU4XDateFormatter_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> ICU4XDateFormatter::format_datetime_to_writeable(const ICU4XDateTime& value, W& write) const {
+  capi::DiplomatWriteable write_writer = diplomat::WriteableTrait<W>::Construct(write);
+  auto diplomat_result_raw_out_value = capi::ICU4XDateFormatter_format_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> ICU4XDateFormatter::format_datetime(const ICU4XDateTime& value) const {
+  std::string diplomat_writeable_string;
+  capi::DiplomatWriteable diplomat_writeable_out = diplomat::WriteableFromString(diplomat_writeable_string);
+  auto diplomat_result_raw_out_value = capi::ICU4XDateFormatter_format_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));
+}
+template<typename W> inline diplomat::result<std::monostate, ICU4XError> ICU4XDateFormatter::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::ICU4XDateFormatter_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> ICU4XDateFormatter::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::ICU4XDateFormatter_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