intl/components/src/NumberParser.h

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4 #ifndef intl_components_NumberParser_h_
   5 #define intl_components_NumberParser_h_
   6
   7 #include "mozilla/intl/ICUError.h"
   8 #include "mozilla/intl/ICU4CGlue.h"
   9 #include "mozilla/Span.h"
  10 #include "mozilla/UniquePtr.h"
  11
  12 #include "unicode/unum.h"
  13
  14 namespace mozilla::intl {
  15
  16 class NumberParser {
  17  public:
  18   /**
  19    * Initialize a new NumberParser for the provided locale and using the
  20    * provided options.
  21    */
  22   static Result<UniquePtr<NumberParser>, ICUError> TryCreate(
  23       const char* aLocale, bool aUseGrouping);
  24
  25   NumberParser() : mNumberFormat(nullptr){};
  26   NumberParser(const NumberParser&) = delete;
  27   NumberParser& operator=(const NumberParser&) = delete;
  28   ~NumberParser();
  29
  30   /**
  31    * Attempts to parse a string representing a double, returning the parsed
  32    * double and the parse position if successful, or an error.
  33    *
  34    * The parse position is the index into the input string where parsing
  35    * stopped because an non-numeric character was encountered.
  36    */
  37   Result<std::pair<double, int32_t>, ICUError> ParseDouble(
  38       Span<const char16_t> aDouble) const;
  39
  40  private:
  41   ICUPointer<UNumberFormat> mNumberFormat;
  42 };
  43
  44 }  // namespace mozilla::intl
  45
  46 #endif