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ðŸ“„ msgfmt.h(44.11 KB)
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ðŸ“„ numberformatter.h(86.31 KB)
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ðŸ“„ numfmt.h(49.81 KB)
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ðŸ“„ parseerr.h(3.08 KB)
ðŸ“„ parsepos.h(5.56 KB)
ðŸ“„ platform.h(28.08 KB)
ðŸ“„ plurfmt.h(25.2 KB)
ðŸ“„ plurrule.h(18.39 KB)
ðŸ“„ ptypes.h(3.49 KB)
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ðŸ“„ simpleformatter.h(12.59 KB)
ðŸ“„ simpletz.h(45.44 KB)
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ðŸ“„ timezone.h(41.02 KB)
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ðŸ“„ translit.h(65.82 KB)
ðŸ“„ tzfmt.h(42.89 KB)
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ðŸ“„ tzrule.h(35.37 KB)
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ðŸ“„ ubidi.h(89.56 KB)
ðŸ“„ ubiditransform.h(12.65 KB)
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ðŸ“„ ucal.h(56.9 KB)
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ðŸ“„ uchar.h(140.56 KB)
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ðŸ“„ ugender.h(2 KB)
ðŸ“„ uidna.h(33.37 KB)
ðŸ“„ uiter.h(22.77 KB)
ðŸ“„ uldnames.h(10.45 KB)
ðŸ“„ ulistformatter.h(8.83 KB)
ðŸ“„ uloc.h(52.54 KB)
ðŸ“„ ulocdata.h(11.26 KB)
ðŸ“„ umachine.h(14.53 KB)
ðŸ“„ umisc.h(1.33 KB)
ðŸ“„ umsg.h(24.23 KB)
ðŸ“„ umutablecptrie.h(8.24 KB)
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ðŸ“„ unimatch.h(6.1 KB)
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ðŸ“„ uniset.h(64.9 KB)
ðŸ“„ unistr.h(170.43 KB)
ðŸ“„ unorm.h(20.52 KB)
ðŸ“„ unorm2.h(24.66 KB)
ðŸ“„ unum.h(53.62 KB)
ðŸ“„ unumberformatter.h(25.36 KB)
ðŸ“„ unumsys.h(7.21 KB)
ðŸ“„ uobject.h(10.68 KB)
ðŸ“„ upluralrules.h(7.88 KB)
ðŸ“„ uregex.h(72.05 KB)
ðŸ“„ uregion.h(9.84 KB)
ðŸ“„ ureldatefmt.h(17.26 KB)
ðŸ“„ urename.h(130.97 KB)
ðŸ“„ urep.h(5.38 KB)
ðŸ“„ ures.h(36.54 KB)
ðŸ“„ uscript.h(26.87 KB)
ðŸ“„ usearch.h(38.12 KB)
ðŸ“„ uset.h(40 KB)
ðŸ“„ usetiter.h(9.55 KB)
ðŸ“„ ushape.h(18 KB)
ðŸ“„ uspoof.h(65.9 KB)
ðŸ“„ usprep.h(8.14 KB)
ðŸ“„ ustdio.h(38.54 KB)
ðŸ“„ ustream.h(1.89 KB)
ðŸ“„ ustring.h(72.47 KB)
ðŸ“„ ustringtrie.h(3.15 KB)
ðŸ“„ utext.h(58.13 KB)
ðŸ“„ utf.h(7.86 KB)
ðŸ“„ utf16.h(23.32 KB)
ðŸ“„ utf32.h(763 B)
ðŸ“„ utf8.h(30.96 KB)
ðŸ“„ utf_old.h(45.83 KB)
ðŸ“„ utmscale.h(13.78 KB)
ðŸ“„ utrace.h(15.73 KB)
ðŸ“„ utrans.h(25.52 KB)
ðŸ“„ utypes.h(30.74 KB)
ðŸ“„ uvernum.h(6.67 KB)
ðŸ“„ uversion.h(6 KB)
ðŸ“„ vtzone.h(20.3 KB)

Editing: plurrule.h

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2008-2015, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*
*
* File PLURRULE.H
*
* Modification History:*
*   Date        Name        Description
*
********************************************************************************
*/

#ifndef PLURRULE
#define PLURRULE

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

/**
 * \file
 * \brief C++ API: PluralRules object
 */

#if !UCONFIG_NO_FORMATTING

#include "unicode/format.h"
#include "unicode/upluralrules.h"
#ifndef U_HIDE_INTERNAL_API
#include "unicode/numfmt.h"
#endif  /* U_HIDE_INTERNAL_API */

/**
 * Value returned by PluralRules::getUniqueKeywordValue() when there is no
 * unique value to return.
 * @stable ICU 4.8
 */
#define UPLRULES_NO_UNIQUE_VALUE ((double)-0.00123456777)

U_NAMESPACE_BEGIN

class Hashtable;
class IFixedDecimal;
class RuleChain;
class PluralRuleParser;
class PluralKeywordEnumeration;
class AndConstraint;
class SharedPluralRules;

namespace number {
class FormattedNumber;
}

/**
 * Defines rules for mapping non-negative numeric values onto a small set of
 * keywords. Rules are constructed from a text description, consisting
 * of a series of keywords and conditions. The {@link #select} method
 * examines each condition in order and returns the keyword for the
 * first condition that matches the number. If none match,
 * default rule(other) is returned.
 *
 * For more information, details, and tips for writing rules, see the
 * LDML spec, C.11 Language Plural Rules:
 * http://www.unicode.org/draft/reports/tr35/tr35.html#Language_Plural_Rules
 *
 * Examples:<pre>
 * "one: n is 1; few: n in 2..4"</pre>
 * This defines two rules, for 'one' and 'few'. The condition for
 * 'one' is "n is 1" which means that the number must be equal to
 * 1 for this condition to pass. The condition for 'few' is
 * "n in 2..4" which means that the number must be between 2 and
 * 4 inclusive for this condition to pass. All other numbers
 * are assigned the keyword "other" by the default rule.
 * <pre>
 * "zero: n is 0; one: n is 1; zero: n mod 100 in 1..19"</pre>
 * This illustrates that the same keyword can be defined multiple times.
 * Each rule is examined in order, and the first keyword whose condition
 * passes is the one returned. Also notes that a modulus is applied
 * to n in the last rule. Thus its condition holds for 119, 219, 319...
 * <pre>
 * "one: n is 1; few: n mod 10 in 2..4 and n mod 100 not in 12..14"</pre>
 * This illustrates conjunction and negation. The condition for 'few'
 * has two parts, both of which must be met: "n mod 10 in 2..4" and
 * "n mod 100 not in 12..14". The first part applies a modulus to n
 * before the test as in the previous example. The second part applies
 * a different modulus and also uses negation, thus it matches all
 * numbers _not_ in 12, 13, 14, 112, 113, 114, 212, 213, 214...
 * 
 * 
 * Syntax:<pre>
 * \code
 * rules = rule (';' rule)*
 * rule = keyword ':' condition
 * keyword = <identifier>
 * condition = and_condition ('or' and_condition)*
 * and_condition = relation ('and' relation)*
 * relation = is_relation | in_relation | within_relation | 'n' <EOL>
 * is_relation = expr 'is' ('not')? value
 * in_relation = expr ('not')? 'in' range_list
 * within_relation = expr ('not')? 'within' range
 * expr = ('n' | 'i' | 'f' | 'v' | 'j') ('mod' value)?
 * range_list = (range | value) (',' range_list)*
 * value = digit+ ('.' digit+)?
 * digit = 0|1|2|3|4|5|6|7|8|9
 * range = value'..'value
 * \endcode
 * </pre>
 * 
 * 
 * The i, f, and v values are defined as follows:
 * 
 * <ul>
 * <li>i to be the integer digits.</li>
 * <li>f to be the visible fractional digits, as an integer.</li>
 * <li>v to be the number of visible fraction digits.</li>
 * <li>j is defined to only match integers. That is j is 3 fails if v != 0 (eg for 3.1 or 3.0).</li>
 * </ul>
 * 
 * Examples are in the following table:
 * 
 * <table border='1' style="border-collapse:collapse">
 * <tr>
 * <th>n</th>
 * <th>i</th>
 * <th>f</th>
 * <th>v</th>
 * </tr>
 * <tr>
 * <td>1.0</td>
 * <td>1</td>
 * <td align="right">0</td>
 * <td>1</td>
 * </tr>
 * <tr>
 * <td>1.00</td>
 * <td>1</td>
 * <td align="right">0</td>
 * <td>2</td>
 * </tr>
 * <tr>
 * <td>1.3</td>
 * <td>1</td>
 * <td align="right">3</td>
 * <td>1</td>
 * </tr>
 * <tr>
 * <td>1.03</td>
 * <td>1</td>
 * <td align="right">3</td>
 * <td>2</td>
 * </tr>
 * <tr>
 * <td>1.23</td>
 * <td>1</td>
 * <td align="right">23</td>
 * <td>2</td>
 * </tr>
 * </table>
 * 
 * The difference between 'in' and 'within' is that 'in' only includes integers in the specified range, while 'within'
 * includes all values. Using 'within' with a range_list consisting entirely of values is the same as using 'in' (it's
 * not an error).
 *

* An "identifier" is a sequence of characters that do not have the
 * Unicode Pattern_Syntax or Pattern_White_Space properties.
 * 
 * The difference between 'in' and 'within' is that 'in' only includes
 * integers in the specified range, while 'within' includes all values.
 * Using 'within' with a range_list consisting entirely of values is the
 * same as using 'in' (it's not an error).
 *
 * 
 * Keywords
 * could be defined by users or from ICU locale data. There are 6
 * predefined values in ICU - 'zero', 'one', 'two', 'few', 'many' and
 * 'other'. Callers need to check the value of keyword returned by
 * {@link #select} method.
 * 
 *
 * Examples:<pre>
 * UnicodeString keyword = pl->select(number);
 * if (keyword== UnicodeString("one") {
 * ...
 * }
 * else if ( ... )
 * </pre>
 * Note: 
 * 
 * ICU defines plural rules for many locales based on CLDR Language Plural Rules.
 * For these predefined rules, see CLDR page at
 * http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/language_plural_rules.html
 * 
 */
class U_I18N_API PluralRules : public UObject {
public:

/**
     * Constructor.
     * @param status  Output param set to success/failure code on exit, which
     *                must not indicate a failure before the function call.
     *
     * @stable ICU 4.0
     */
    PluralRules(UErrorCode& status);

/**
     * Copy constructor.
     * @stable ICU 4.0
     */
    PluralRules(const PluralRules& other);

/**
     * Destructor.
     * @stable ICU 4.0
     */
    virtual ~PluralRules();

/**
     * Clone
     * @stable ICU 4.0
     */
    PluralRules* clone() const;

/**
      * Assignment operator.
      * @stable ICU 4.0
      */
    PluralRules& operator=(const PluralRules&);

/**
     * Creates a PluralRules from a description if it is parsable, otherwise
     * returns NULL.
     *
     * @param description rule description
     * @param status      Output param set to success/failure code on exit, which
     *                    must not indicate a failure before the function call.
     * @return            new PluralRules pointer. NULL if there is an error.
     * @stable ICU 4.0
     */
    static PluralRules* U_EXPORT2 createRules(const UnicodeString& description,
                                              UErrorCode& status);

/**
     * The default rules that accept any number.
     *
     * @param status  Output param set to success/failure code on exit, which
     *                must not indicate a failure before the function call.
     * @return        new PluralRules pointer. NULL if there is an error.
     * @stable ICU 4.0
     */
    static PluralRules* U_EXPORT2 createDefaultRules(UErrorCode& status);

/**
 * Provides access to the predefined cardinal-number <code>PluralRules</code> for a given
 * locale.
 * Same as forLocale(locale, UPLURAL_TYPE_CARDINAL, status).
 *
 * @param locale The locale for which a <code>PluralRules</code> object is
 * returned.
 * @param status Output param set to success/failure code on exit, which
 * must not indicate a failure before the function call.
 * @return The predefined <code>PluralRules</code> object pointer for
 * this locale. If there's no predefined rules for this locale,
 * the rules for the closest parent in the locale hierarchy
 * that has one will be returned. The final fallback always
 * returns the default 'other' rules.
 * @stable ICU 4.0
 */
 static PluralRules* U_EXPORT2 forLocale(const Locale& locale, UErrorCode& status);

/**
 * Provides access to the predefined <code>PluralRules</code> for a given
 * locale and the plural type.
 *
 * @param locale The locale for which a <code>PluralRules</code> object is
 * returned.
 * @param type The plural type (e.g., cardinal or ordinal).
 * @param status Output param set to success/failure code on exit, which
 * must not indicate a failure before the function call.
 * @return The predefined <code>PluralRules</code> object pointer for
 * this locale. If there's no predefined rules for this locale,
 * the rules for the closest parent in the locale hierarchy
 * that has one will be returned. The final fallback always
 * returns the default 'other' rules.
 * @stable ICU 50
 */
 static PluralRules* U_EXPORT2 forLocale(const Locale& locale, UPluralType type, UErrorCode& status);

#ifndef U_HIDE_INTERNAL_API
    /**
     * Return a StringEnumeration over the locales for which there is plurals data.
     * @return a StringEnumeration over the locales available.
     * @internal
     */
    static StringEnumeration* U_EXPORT2 getAvailableLocales(UErrorCode &status);

/**
     * Returns whether or not there are overrides.
     * @param locale       the locale to check.
     * @return
     * @internal
     */
    static UBool hasOverride(const Locale &locale);

/**
     * For ICU use only.
     * creates a  SharedPluralRules object
     * @internal
     */
    static PluralRules* U_EXPORT2 internalForLocale(const Locale& locale, UPluralType type, UErrorCode& status);

/**
     * For ICU use only.
     * Returns handle to the shared, cached PluralRules instance.
     * Caller must call removeRef() on returned value once it is done with
     * the shared instance.
     * @internal
     */
    static const SharedPluralRules* U_EXPORT2 createSharedInstance(
            const Locale& locale, UPluralType type, UErrorCode& status);

#endif  /* U_HIDE_INTERNAL_API */

/**
     * Given an integer, returns the keyword of the first rule
     * that applies to  the number.  This function can be used with
     * isKeyword* functions to determine the keyword for default plural rules.
     *
     * @param number  The number for which the rule has to be determined.
     * @return        The keyword of the selected rule.
     * @stable ICU 4.0
     */
    UnicodeString select(int32_t number) const;

/**
     * Given a floating-point number, returns the keyword of the first rule
     * that applies to  the number.  This function can be used with
     * isKeyword* functions to determine the keyword for default plural rules.
     *
     * @param number  The number for which the rule has to be determined.
     * @return        The keyword of the selected rule.
     * @stable ICU 4.0
     */
    UnicodeString select(double number) const;

#ifndef U_HIDE_DRAFT_API
    /**
     * Given a formatted number, returns the keyword of the first rule
     * that applies to  the number.  This function can be used with
     * isKeyword* functions to determine the keyword for default plural rules.
     *
     * A FormattedNumber allows you to specify an exponent or trailing zeros,
     * which can affect the plural category. To get a FormattedNumber, see
     * NumberFormatter.
     *
     * @param number  The number for which the rule has to be determined.
     * @param status  Set if an error occurs while selecting plural keyword.
     *                This could happen if the FormattedNumber is invalid.
     * @return        The keyword of the selected rule.
     * @draft ICU 64
     */
    UnicodeString select(const number::FormattedNumber& number, UErrorCode& status) const;
#endif  /* U_HIDE_DRAFT_API */

#ifndef U_HIDE_INTERNAL_API
    /**
      * @internal
      */
    UnicodeString select(const IFixedDecimal &number) const;
#endif  /* U_HIDE_INTERNAL_API */

/**
 * Returns a list of all rule keywords used in this <code>PluralRules</code>
 * object. The rule 'other' is always present by default.
 *
 * @param status Output param set to success/failure code on exit, which
 * must not indicate a failure before the function call.
 * @return StringEnumeration with the keywords.
 * The caller must delete the object.
 * @stable ICU 4.0
 */
 StringEnumeration* getKeywords(UErrorCode& status) const;

#ifndef U_HIDE_DEPRECATED_API
    /**
     * Deprecated Function, does not return useful results.
     *
     * Originally intended to return a unique value for this keyword if it exists,
     * else the constant UPLRULES_NO_UNIQUE_VALUE.
     *
     * @param keyword The keyword.
     * @return        Stub deprecated function returns UPLRULES_NO_UNIQUE_VALUE always.
     * @deprecated ICU 55
     */
    double getUniqueKeywordValue(const UnicodeString& keyword);

/**
     * Deprecated Function, does not produce useful results.
     *
     * Originally intended to return all the values for which select() would return the keyword.
     * If the keyword is unknown, returns no values, but this is not an error.  If
     * the number of values is unlimited, returns no values and -1 as the
     * count.
     *
     * The number of returned values is typically small.
     *
     * @param keyword      The keyword.
     * @param dest         Array into which to put the returned values.  May
     *                     be NULL if destCapacity is 0.
     * @param destCapacity The capacity of the array, must be at least 0.
     * @param status       The error code. Deprecated function, always sets U_UNSUPPORTED_ERROR.
     * @return             The count of values available, or -1.  This count
     *                     can be larger than destCapacity, but no more than
     *                     destCapacity values will be written.
     * @deprecated ICU 55
     */
    int32_t getAllKeywordValues(const UnicodeString &keyword,
                                double *dest, int32_t destCapacity,
                                UErrorCode& status);
#endif  /* U_HIDE_DEPRECATED_API */

/**
     * Returns sample values for which select() would return the keyword.  If
     * the keyword is unknown, returns no values, but this is not an error.
     *
     * The number of returned values is typically small.
     *
     * @param keyword      The keyword.
     * @param dest         Array into which to put the returned values.  May
     *                     be NULL if destCapacity is 0.
     * @param destCapacity The capacity of the array, must be at least 0.
     * @param status       The error code.
     * @return             The count of values written.
     *                     If more than destCapacity samples are available, then
     *                     only destCapacity are written, and destCapacity is returned as the count,
     *                     rather than setting a U_BUFFER_OVERFLOW_ERROR.
     *                     (The actual number of keyword values could be unlimited.)
     * @stable ICU 4.8
     */
    int32_t getSamples(const UnicodeString &keyword,
                       double *dest, int32_t destCapacity,
                       UErrorCode& status);

/**
 * Returns TRUE if the given keyword is defined in this
 * <code>PluralRules</code> object.
 *
 * @param keyword the input keyword.
 * @return TRUE if the input keyword is defined.
 * Otherwise, return FALSE.
 * @stable ICU 4.0
 */
 UBool isKeyword(const UnicodeString& keyword) const;

/**
     * Returns keyword for default plural form.
     *
     * @return         keyword for default plural form.
     * @stable ICU 4.0
     */
    UnicodeString getKeywordOther() const;

#ifndef U_HIDE_INTERNAL_API
    /**
     *
     * @internal
     */
     UnicodeString getRules() const;
#endif  /* U_HIDE_INTERNAL_API */

/**
     * Compares the equality of two PluralRules objects.
     *
     * @param other The other PluralRules object to be compared with.
     * @return      True if the given PluralRules is the same as this
     *              PluralRules; false otherwise.
     * @stable ICU 4.0
     */
    virtual UBool operator==(const PluralRules& other) const;

/**
     * Compares the inequality of two PluralRules objects.
     *
     * @param other The PluralRules object to be compared with.
     * @return      True if the given PluralRules is not the same as this
     *              PluralRules; false otherwise.
     * @stable ICU 4.0
     */
    UBool operator!=(const PluralRules& other) const  {return !operator==(other);}

/**
     * ICU "poor man's RTTI", returns a UClassID for this class.
     *
     * @stable ICU 4.0
     *
    */
    static UClassID U_EXPORT2 getStaticClassID(void);

/**
     * ICU "poor man's RTTI", returns a UClassID for the actual class.
     *
     * @stable ICU 4.0
     */
    virtual UClassID getDynamicClassID() const;

private:
    RuleChain  *mRules;

PluralRules();   // default constructor not implemented
    void            parseDescription(const UnicodeString& ruleData, UErrorCode &status);
    int32_t         getNumberValue(const UnicodeString& token) const;
    UnicodeString   getRuleFromResource(const Locale& locale, UPluralType type, UErrorCode& status);
    RuleChain      *rulesForKeyword(const UnicodeString &keyword) const;

/**
    * An internal status variable used to indicate that the object is in an 'invalid' state.
    * Used by copy constructor, the assignment operator and the clone method.
    */
    UErrorCode mInternalStatus;

friend class PluralRuleParser;
};

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // _PLURRULE
//eof

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