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// © 2022 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
#ifndef __FORMATTEDNUMBER_H__
#define __FORMATTEDNUMBER_H__
#include "unicode/utypes.h"
#if U_SHOW_CPLUSPLUS_API
#if !UCONFIG_NO_FORMATTING
#include "unicode/uobject.h"
#include "unicode/formattedvalue.h"
#include "unicode/measunit.h"
#include "unicode/udisplayoptions.h"
/**
* \file
* \brief C API: Formatted number result from various number formatting functions.
*
* See also {@link icu::FormattedValue} for additional things you can do with a FormattedNumber.
*/
U_NAMESPACE_BEGIN
class FieldPositionIteratorHandler;
class SimpleDateFormat;
namespace number { // icu::number
namespace impl {
class DecimalQuantity;
class UFormattedNumberData;
struct UFormattedNumberImpl;
} // icu::number::impl
/**
* The result of a number formatting operation. This class allows the result to be exported in several data types,
* including a UnicodeString and a FieldPositionIterator.
*
* Instances of this class are immutable and thread-safe.
*
* @stable ICU 60
*/
class U_I18N_API FormattedNumber : public UMemory, public FormattedValue {
public:
/**
* Default constructor; makes an empty FormattedNumber.
* @stable ICU 64
*/
FormattedNumber()
: fData(nullptr), fErrorCode(U_INVALID_STATE_ERROR) {}
/**
* Move constructor: Leaves the source FormattedNumber in an undefined state.
* @stable ICU 62
*/
FormattedNumber(FormattedNumber&& src) noexcept;
/**
* Destruct an instance of FormattedNumber.
* @stable ICU 60
*/
virtual ~FormattedNumber() override;
/** Copying not supported; use move constructor instead. */
FormattedNumber(const FormattedNumber&) = delete;
/** Copying not supported; use move assignment instead. */
FormattedNumber& operator=(const FormattedNumber&) = delete;
/**
* Move assignment: Leaves the source FormattedNumber in an undefined state.
* @stable ICU 62
*/
FormattedNumber& operator=(FormattedNumber&& src) noexcept;
// Copybrief: this method is older than the parent method
/**
* @copybrief FormattedValue::toString()
*
* For more information, see FormattedValue::toString()
*
* @stable ICU 62
*/
UnicodeString toString(UErrorCode& status) const override;
// Copydoc: this method is new in ICU 64
/** @copydoc FormattedValue::toTempString() */
UnicodeString toTempString(UErrorCode& status) const override;
// Copybrief: this method is older than the parent method
/**
* @copybrief FormattedValue::appendTo()
*
* For more information, see FormattedValue::appendTo()
*
* @stable ICU 62
*/
Appendable &appendTo(Appendable& appendable, UErrorCode& status) const override;
// Copydoc: this method is new in ICU 64
/** @copydoc FormattedValue::nextPosition() */
UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const override;
/**
* Export the formatted number as a "numeric string" conforming to the
* syntax defined in the Decimal Arithmetic Specification, available at
* http://speleotrove.com/decimal
*
* This endpoint is useful for obtaining the exact number being printed
* after scaling and rounding have been applied by the number formatter.
*
* Example call site:
*
* auto decimalNumber = fn.toDecimalNumber<std::string>(status);
*
* @tparam StringClass A string class compatible with StringByteSink;
* for example, std::string.
* @param status Set if an error occurs.
* @return A StringClass containing the numeric string.
* @stable ICU 65
*/
template<typename StringClass>
inline StringClass toDecimalNumber(UErrorCode& status) const;
/**
* Gets the resolved output unit.
*
* The output unit is dependent upon the localized preferences for the usage
* specified via NumberFormatterSettings::usage(), and may be a unit with
* UMEASURE_UNIT_MIXED unit complexity (MeasureUnit::getComplexity()), such
* as "foot-and-inch" or "hour-and-minute-and-second".
*
* @return `MeasureUnit`.
* @stable ICU 68
*/
MeasureUnit getOutputUnit(UErrorCode& status) const;
/**
* Gets the noun class of the formatted output. Returns `UNDEFINED` when the noun class
* is not supported yet.
*
* @return UDisplayOptionsNounClass
* @stable ICU 72
*/
UDisplayOptionsNounClass getNounClass(UErrorCode &status) const;
#ifndef U_HIDE_INTERNAL_API
/**
* Gets the raw DecimalQuantity for plural rule selection.
* @internal
*/
void getDecimalQuantity(impl::DecimalQuantity& output, UErrorCode& status) const;
/**
* Populates the mutable builder type FieldPositionIteratorHandler.
* @internal
*/
void getAllFieldPositionsImpl(FieldPositionIteratorHandler& fpih, UErrorCode& status) const;
#endif /* U_HIDE_INTERNAL_API */
private:
// Can't use LocalPointer because UFormattedNumberData is forward-declared
impl::UFormattedNumberData *fData;
// Error code for the terminal methods
UErrorCode fErrorCode;
/**
* Internal constructor from data type. Adopts the data pointer.
* @internal (private)
*/
explicit FormattedNumber(impl::UFormattedNumberData *results)
: fData(results), fErrorCode(U_ZERO_ERROR) {}
explicit FormattedNumber(UErrorCode errorCode)
: fData(nullptr), fErrorCode(errorCode) {}
void toDecimalNumber(ByteSink& sink, UErrorCode& status) const;
// To give LocalizedNumberFormatter format methods access to this class's constructor:
friend class LocalizedNumberFormatter;
friend class SimpleNumberFormatter;
// To give C API access to internals
friend struct impl::UFormattedNumberImpl;
// To give access to the data pointer for non-heap allocation
friend class icu::SimpleDateFormat;
};
template<typename StringClass>
StringClass FormattedNumber::toDecimalNumber(UErrorCode& status) const {
StringClass result;
StringByteSink<StringClass> sink(&result);
toDecimalNumber(sink, status);
return result;
}
} // namespace number
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif /* U_SHOW_CPLUSPLUS_API */
#endif // __FORMATTEDNUMBER_H__
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