Region is the class representing a Unicode Region Code, also known as a
* Unicode Region Subtag, which is defined based upon the BCP 47 standard. We often think of
* "regions" as "countries" when defining the characteristics of a locale. Region codes There are different
* types of region codes that are important to distinguish.
* * Macroregion - A code for a "macro geographical (continental) region, geographical sub-region, or * selected economic and other grouping" as defined in * UN M.49 (http://unstats.un.org/unsd/methods/m49/m49regin.htm). * These are typically 3-digit codes, but contain some 2-letter codes, such as the LDML code QO * added for Outlying Oceania. Not all UNM.49 codes are defined in LDML, but most of them are. * Macroregions are represented in ICU by one of three region types: WORLD ( region code 001 ), * CONTINENTS ( regions contained directly by WORLD ), and SUBCONTINENTS ( things contained directly * by a continent ). *
* TERRITORY - A Region that is not a Macroregion. These are typically codes for countries, but also * include areas that are not separate countries, such as the code "AQ" for Antarctica or the code * "HK" for Hong Kong (SAR China). Overseas dependencies of countries may or may not have separate * codes. The codes are typically 2-letter codes aligned with the ISO 3166 standard, but BCP47 allows * for the use of 3-digit codes in the future. *
* UNKNOWN - The code ZZ is defined by Unicode LDML for use to indicate that the Region is unknown, * or that the value supplied as a region was invalid. *
* DEPRECATED - Region codes that have been defined in the past but are no longer in modern usage, * usually due to a country splitting into multiple territories or changing its name. *
* GROUPING - A widely understood grouping of territories that has a well defined membership such * that a region code has been assigned for it. Some of these are UNM.49 codes that do't fall into * the world/continent/sub-continent hierarchy, while others are just well known groupings that have * their own region code. Region "EU" (European Union) is one such region code that is a grouping. * Groupings will never be returned by the getContainingRegion() API, since a different type of region * ( WORLD, CONTINENT, or SUBCONTINENT ) will always be the containing region instead. * * The Region class is not intended for public subclassing. * * @author John Emmons * @stable ICU 51 */ class U_I18N_API Region : public UObject { public: /** * Destructor. * @stable ICU 51 */ virtual ~Region(); /** * Returns true if the two regions are equal. * @stable ICU 51 */ bool operator==(const Region &that) const; /** * Returns true if the two regions are NOT equal; that is, if operator ==() returns false. * @stable ICU 51 */ bool operator!=(const Region &that) const; /** * Returns a pointer to a Region using the given region code. The region code can be either 2-letter ISO code, * 3-letter ISO code, UNM.49 numeric code, or other valid Unicode Region Code as defined by the LDML specification. * The identifier will be canonicalized internally using the supplemental metadata as defined in the CLDR. * If the region code is nullptr or not recognized, the appropriate error code will be set ( U_ILLEGAL_ARGUMENT_ERROR ) * @stable ICU 51 */ static const Region* U_EXPORT2 getInstance(const char *region_code, UErrorCode &status); /** * Returns a pointer to a Region using the given numeric region code. If the numeric region code is not recognized, * the appropriate error code will be set ( U_ILLEGAL_ARGUMENT_ERROR ). * @stable ICU 51 */ static const Region* U_EXPORT2 getInstance (int32_t code, UErrorCode &status); /** * Returns an enumeration over the IDs of all known regions that match the given type. * @stable ICU 55 */ static StringEnumeration* U_EXPORT2 getAvailable(URegionType type, UErrorCode &status); /** * Returns a pointer to the region that contains this region. Returns nullptr if this region is code "001" (World) * or "ZZ" (Unknown region). For example, calling this method with region "IT" (Italy) returns the * region "039" (Southern Europe). * @stable ICU 51 */ const Region* getContainingRegion() const; /** * Return a pointer to the region that geographically contains this region and matches the given type, * moving multiple steps up the containment chain if necessary. Returns nullptr if no containing region can be found * that matches the given type. Note: The URegionTypes = "URGN_GROUPING", "URGN_DEPRECATED", or "URGN_UNKNOWN" * are not appropriate for use in this API. nullptr will be returned in this case. For example, calling this method * with region "IT" (Italy) for type "URGN_CONTINENT" returns the region "150" ( Europe ). * @stable ICU 51 */ const Region* getContainingRegion(URegionType type) const; /** * Return an enumeration over the IDs of all the regions that are immediate children of this region in the * region hierarchy. These returned regions could be either macro regions, territories, or a mixture of the two, * depending on the containment data as defined in CLDR. This API may return nullptr if this region doesn't have * any sub-regions. For example, calling this method with region "150" (Europe) returns an enumeration containing * the various sub regions of Europe - "039" (Southern Europe) - "151" (Eastern Europe) - "154" (Northern Europe) * and "155" (Western Europe). * @stable ICU 55 */ StringEnumeration* getContainedRegions(UErrorCode &status) const; /** * Returns an enumeration over the IDs of all the regions that are children of this region anywhere in the region * hierarchy and match the given type. This API may return an empty enumeration if this region doesn't have any * sub-regions that match the given type. For example, calling this method with region "150" (Europe) and type * "URGN_TERRITORY" returns a set containing all the territories in Europe ( "FR" (France) - "IT" (Italy) - "DE" (Germany) etc. ) * @stable ICU 55 */ StringEnumeration* getContainedRegions( URegionType type, UErrorCode &status ) const; /** * Returns true if this region contains the supplied other region anywhere in the region hierarchy. * @stable ICU 51 */ UBool contains(const Region &other) const; /** * For deprecated regions, return an enumeration over the IDs of the regions that are the preferred replacement * regions for this region. Returns null for a non-deprecated region. For example, calling this method with region * "SU" (Soviet Union) would return a list of the regions containing "RU" (Russia), "AM" (Armenia), "AZ" (Azerbaijan), etc... * @stable ICU 55 */ StringEnumeration* getPreferredValues(UErrorCode &status) const; /** * Return this region's canonical region code. * @stable ICU 51 */ const char* getRegionCode() const; /** * Return this region's numeric code. * Returns a negative value if the given region does not have a numeric code assigned to it. * @stable ICU 51 */ int32_t getNumericCode() const; /** * Returns the region type of this region. * @stable ICU 51 */ URegionType getType() const; #ifndef U_HIDE_INTERNAL_API /** * Cleans up statically allocated memory. * @internal */ static void cleanupRegionData(); #endif /* U_HIDE_INTERNAL_API */ private: char id[4]; UnicodeString idStr; int32_t code; URegionType fType; Region *containingRegion; UVector *containedRegions; UVector *preferredValues; /** * Default Constructor. Internal - use factory methods only. */ Region(); /* * Initializes the region data from the ICU resource bundles. The region data * contains the basic relationships such as which regions are known, what the numeric * codes are, any known aliases, and the territory containment data. * * If the region data has already loaded, then this method simply returns without doing * anything meaningful. */ static void U_CALLCONV loadRegionData(UErrorCode &status); }; U_NAMESPACE_END #endif /* #if !UCONFIG_NO_FORMATTING */ #endif /* U_SHOW_CPLUSPLUS_API */ #endif // REGION_H //eof