1 files changed, 46 insertions, 0 deletions
diff --git a/intl/components/src/NumberParser.h b/intl/components/src/NumberParser.h
new file mode 100644
index 0000000000..97efec0836
--- /dev/null
+++ b/intl/components/src/NumberParser.h
@@ -0,0 +1,46 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef intl_components_NumberParser_h_
+#define intl_components_NumberParser_h_
+
+#include "mozilla/intl/ICUError.h"
+#include "mozilla/intl/ICU4CGlue.h"
+#include "mozilla/Span.h"
+#include "mozilla/UniquePtr.h"
+
+#include "unicode/unum.h"
+
+namespace mozilla::intl {
+
+class NumberParser {
+ public:
+  /**
+   * Initialize a new NumberParser for the provided locale and using the
+   * provided options.
+   */
+  static Result<UniquePtr<NumberParser>, ICUError> TryCreate(
+      const char* aLocale, bool aUseGrouping);
+
+  NumberParser() : mNumberFormat(nullptr){};
+  NumberParser(const NumberParser&) = delete;
+  NumberParser& operator=(const NumberParser&) = delete;
+  ~NumberParser();
+
+  /**
+   * Attempts to parse a string representing a double, returning the parsed
+   * double and the parse position if successful, or an error.
+   *
+   * The parse position is the index into the input string where parsing
+   * stopped because an non-numeric character was encountered.
+   */
+  Result<std::pair<double, int32_t>, ICUError> ParseDouble(
+      Span<const char16_t> aDouble) const;
+
+ private:
+  ICUPointer<UNumberFormat> mNumberFormat;
+};
+
+}  // namespace mozilla::intl
+
+#endif