name : compactdecimalformat.h // © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************** * Copyright (C) 2012-2016, International Business Machines * Corporation and others. All Rights Reserved. ******************************************************************************** * * File COMPACTDECIMALFORMAT.H ******************************************************************************** */ #ifndef __COMPACT_DECIMAL_FORMAT_H__ #define __COMPACT_DECIMAL_FORMAT_H__ #include "unicode/utypes.h" #if U_SHOW_CPLUSPLUS_API /** * \file * \brief C++ API: Compatibility APIs for compact decimal number formatting. */ #if !UCONFIG_NO_FORMATTING #include "unicode/decimfmt.h" struct UHashtable; U_NAMESPACE_BEGIN class PluralRules; /** * **IMPORTANT:** New users are strongly encouraged to see if * numberformatter.h fits their use case. Although not deprecated, this header * is provided for backwards compatibility only. * * ----------------------------------------------------------------------------- * * The CompactDecimalFormat produces abbreviated numbers, suitable for display in * environments will limited real estate. For example, 'Hits: 1.2B' instead of * 'Hits: 1,200,000,000'. The format will be appropriate for the given language, * such as "1,2 Mrd." for German. * * For numbers under 1000 trillion (under 10^15, such as 123,456,789,012,345), * the result will be short for supported languages. However, the result may * sometimes exceed 7 characters, such as when there are combining marks or thin * characters. In such cases, the visual width in fonts should still be short. * * By default, there are 3 significant digits. After creation, if more than * three significant digits are set (with setMaximumSignificantDigits), or if a * fixed number of digits are set (with setMaximumIntegerDigits or * setMaximumFractionDigits), then result may be wider. * * At this time, parsing is not supported, and will produce a U_UNSUPPORTED_ERROR. * Resetting the pattern prefixes or suffixes is not supported; the method calls * are ignored. * * @stable ICU 51 */ class U_I18N_API CompactDecimalFormat : public DecimalFormat { public: /** * Returns a compact decimal instance for specified locale. * * **NOTE:** New users are strongly encouraged to use * `number::NumberFormatter` instead of NumberFormat. * @param inLocale the given locale. * @param style whether to use short or long style. * @param status error code returned here. * @stable ICU 51 */ static CompactDecimalFormat* U_EXPORT2 createInstance( const Locale& inLocale, UNumberCompactStyle style, UErrorCode& status); /** * Copy constructor. * * @param source the DecimalFormat object to be copied from. * @stable ICU 51 */ CompactDecimalFormat(const CompactDecimalFormat& source); /** * Destructor. * @stable ICU 51 */ ~CompactDecimalFormat() override; /** * Assignment operator. * * @param rhs the DecimalFormat object to be copied. * @stable ICU 51 */ CompactDecimalFormat& operator=(const CompactDecimalFormat& rhs); /** * Clone this Format object polymorphically. The caller owns the * result and should delete it when done. * * @return a polymorphic copy of this CompactDecimalFormat. * @stable ICU 51 */ CompactDecimalFormat* clone() const override; using DecimalFormat::format; /** * CompactDecimalFormat does not support parsing. This implementation * does nothing. * @param text Unused. * @param result Does not change. * @param parsePosition Does not change. * @see Formattable * @stable ICU 51 */ void parse(const UnicodeString& text, Formattable& result, ParsePosition& parsePosition) const override; /** * CompactDecimalFormat does not support parsing. This implementation * sets status to U_UNSUPPORTED_ERROR * * @param text Unused. * @param result Does not change. * @param status Always set to U_UNSUPPORTED_ERROR. * @stable ICU 51 */ void parse(const UnicodeString& text, Formattable& result, UErrorCode& status) const override; #ifndef U_HIDE_INTERNAL_API /** * Parses text from the given string as a currency amount. Unlike * the parse() method, this method will attempt to parse a generic * currency name, searching for a match of this object's locale's * currency display names, or for a 3-letter ISO currency code. * This method will fail if this format is not a currency format, * that is, if it does not contain the currency pattern symbol * (U+00A4) in its prefix or suffix. This implementation always returns * nullptr. * * @param text the string to parse * @param pos input-output position; on input, the position within text * to match; must have 0 <= pos.getIndex() < text.length(); * on output, the position after the last matched character. * If the parse fails, the position in unchanged upon output. * @return if parse succeeds, a pointer to a newly-created CurrencyAmount * object (owned by the caller) containing information about * the parsed currency; if parse fails, this is nullptr. * @internal */ CurrencyAmount* parseCurrency(const UnicodeString& text, ParsePosition& pos) const override; #endif /* U_HIDE_INTERNAL_API */ /** * Return the class ID for this class. This is useful only for * comparing to a return value from getDynamicClassID(). For example: * <pre> * . Base* polymorphic_pointer = createPolymorphicObject(); * . if (polymorphic_pointer->getDynamicClassID() == * . Derived::getStaticClassID()) ... * </pre> * @return The class ID for all objects of this class. * @stable ICU 51 */ static UClassID U_EXPORT2 getStaticClassID(); /** * Returns a unique class ID POLYMORPHICALLY. Pure virtual override. * This method is to implement a simple version of RTTI, since not all * C++ compilers support genuine RTTI. Polymorphic operator==() and * clone() methods call this method. * * @return The class ID for this object. All objects of a * given class have the same class ID. Objects of * other classes have different class IDs. * @stable ICU 51 */ UClassID getDynamicClassID() const override; private: CompactDecimalFormat(const Locale& inLocale, UNumberCompactStyle style, UErrorCode& status); }; U_NAMESPACE_END #endif /* #if !UCONFIG_NO_FORMATTING */ #endif /* U_SHOW_CPLUSPLUS_API */ #endif // __COMPACT_DECIMAL_FORMAT_H__ //eof