The resources contain three predefined formatters for each locale: spellout, which + * spells out a value in words (123 is "one hundred twenty-three"); ordinal, which + * appends an ordinal suffix to the end of a numeral (123 is "123rd"); and + * duration, which shows a duration in seconds as hours, minutes, and seconds (123 is + * "2:03"). The client can also define more specialized RuleBasedNumberFormats + * by supplying programmer-defined rule sets.
+ * + *The behavior of a RuleBasedNumberFormat is specified by a textual description + * that is either passed to the constructor as a String or loaded from a resource + * bundle. In its simplest form, the description consists of a semicolon-delimited list of rules. + * Each rule has a string of output text and a value or range of values it is applicable to. + * In a typical spellout rule set, the first twenty rules are the words for the numbers from + * 0 to 19:
+ * + *zero; one; two; three; four; five; six; seven; eight; nine; + * ten; eleven; twelve; thirteen; fourteen; fifteen; sixteen; seventeen; eighteen; nineteen;+ * + *
For larger numbers, we can use the preceding set of rules to format the ones place, and + * we only have to supply the words for the multiples of 10:
+ * + *20: twenty[->>]; + * 30: thirty[->>]; + * 40: forty[->>]; + * 50: fifty[->>]; + * 60: sixty[->>]; + * 70: seventy[->>]; + * 80: eighty[->>]; + * 90: ninety[->>];+ * + *
In these rules, the base value is spelled out explicitly and set off from the + * rule's output text with a colon. The rules are in a sorted list, and a rule is applicable + * to all numbers from its own base value to one less than the next rule's base value. The + * ">>" token is called a substitution and tells the fomatter to + * isolate the number's ones digit, format it using this same set of rules, and place the + * result at the position of the ">>" token. Text in brackets is omitted if + * the number being formatted is an even multiple of 10 (the hyphen is a literal hyphen; 24 + * is "twenty-four," not "twenty four").
+ * + *For even larger numbers, we can actually look up several parts of the number in the + * list:
+ * + *100: << hundred[ >>];+ * + *
The "<<" represents a new kind of substitution. The << isolates + * the hundreds digit (and any digits to its left), formats it using this same rule set, and + * places the result where the "<<" was. Notice also that the meaning of + * >> has changed: it now refers to both the tens and the ones digits. The meaning of + * both substitutions depends on the rule's base value. The base value determines the rule's divisor, + * which is the highest power of 10 that is less than or equal to the base value (the user + * can change this). To fill in the substitutions, the formatter divides the number being + * formatted by the divisor. The integral quotient is used to fill in the << + * substitution, and the remainder is used to fill in the >> substitution. The meaning + * of the brackets changes similarly: text in brackets is omitted if the value being + * formatted is an even multiple of the rule's divisor. The rules are applied recursively, so + * if a substitution is filled in with text that includes another substitution, that + * substitution is also filled in.
+ * + *This rule covers values up to 999, at which point we add another rule:
+ * + *1000: << thousand[ >>];+ * + *
Again, the meanings of the brackets and substitution tokens shift because the rule's + * base value is a higher power of 10, changing the rule's divisor. This rule can actually be + * used all the way up to 999,999. This allows us to finish out the rules as follows:
+ * + *1,000,000: << million[ >>]; + * 1,000,000,000: << billion[ >>]; + * 1,000,000,000,000: << trillion[ >>]; + * 1,000,000,000,000,000: OUT OF RANGE!;+ * + *
Commas, periods, and spaces can be used in the base values to improve legibility and + * are ignored by the rule parser. The last rule in the list is customarily treated as an + * "overflow rule," applying to everything from its base value on up, and often (as + * in this example) being used to print out an error message or default representation. + * Notice also that the size of the major groupings in large numbers is controlled by the + * spacing of the rules: because in English we group numbers by thousand, the higher rules + * are separated from each other by a factor of 1,000.
+ * + *To see how these rules actually work in practice, consider the following example: + * Formatting 25,430 with this rule set would work like this:
+ * + *| << thousand >> | + *[the rule whose base value is 1,000 is applicable to 25,340] | + *
| twenty->> thousand >> | + *[25,340 over 1,000 is 25. The rule for 20 applies.] | + *
| twenty-five thousand >> | + *[25 mod 10 is 5. The rule for 5 is "five." | + *
| twenty-five thousand << hundred >> | + *[25,340 mod 1,000 is 340. The rule for 100 applies.] | + *
| twenty-five thousand three hundred >> | + *[340 over 100 is 3. The rule for 3 is "three."] | + *
| twenty-five thousand three hundred forty | + *[340 mod 100 is 40. The rule for 40 applies. Since 40 divides + * evenly by 10, the hyphen and substitution in the brackets are omitted.] | + *
The above syntax suffices only to format positive integers. To format negative numbers, + * we add a special rule:
+ * + *-x: minus >>;+ * + *
This is called a negative-number rule, and is identified by "-x" + * where the base value would be. This rule is used to format all negative numbers. the + * >> token here means "find the number's absolute value, format it with these + * rules, and put the result here."
+ * + *We also add a special rule called a fraction rule for numbers with fractional + * parts:
+ * + *x.x: << point >>;+ * + *
This rule is used for all positive non-integers (negative non-integers pass through the + * negative-number rule first and then through this rule). Here, the << token refers to + * the number's integral part, and the >> to the number's fractional part. The + * fractional part is formatted as a series of single-digit numbers (e.g., 123.456 would be + * formatted as "one hundred twenty-three point four five six").
+ * + *To see how this rule syntax is applied to various languages, examine the resource data.
+ * + *There is actually much more flexibility built into the rule language than the + * description above shows. A formatter may own multiple rule sets, which can be selected by + * the caller, and which can use each other to fill in their substitutions. Substitutions can + * also be filled in with digits, using a DecimalFormat object. There is syntax that can be + * used to alter a rule's divisor in various ways. And there is provision for much more + * flexible fraction handling. A complete description of the rule syntax follows:
+ * + *The description of a RuleBasedNumberFormat's behavior consists of one or more rule + * sets. Each rule set consists of a name, a colon, and a list of rules. A rule + * set name must begin with a % sign. Rule sets with names that begin with a single % sign + * are public: the caller can specify that they be used to format and parse numbers. + * Rule sets with names that begin with %% are private: they exist only for the use + * of other rule sets. If a formatter only has one rule set, the name may be omitted.
+ * + *The user can also specify a special "rule set" named %%lenient-parse. + * The body of %%lenient-parse isn't a set of number-formatting rules, but a RuleBasedCollator + * description which is used to define equivalences for lenient parsing. For more information + * on the syntax, see RuleBasedCollator. For more information on lenient parsing, + * see setLenientParse(). Note: symbols that have syntactic meaning + * in collation rules, such as '&', have no particular meaning when appearing outside + * of the lenient-parse rule set.
+ * + *The body of a rule set consists of an ordered, semicolon-delimited list of rules. + * Internally, every rule has a base value, a divisor, rule text, and zero, one, or two substitutions. + * These parameters are controlled by the description syntax, which consists of a rule + * descriptor, a colon, and a rule body.
+ * + *A rule descriptor can take one of the following forms (text in italics is the + * name of a token):
+ * + *| bv: | + *bv specifies the rule's base value. bv is a decimal + * number expressed using ASCII digits. bv may contain spaces, period, and commas, + * which are ignored. The rule's divisor is the highest power of 10 less than or equal to + * the base value. | + *
| bv/rad: | + *bv specifies the rule's base value. The rule's divisor is the + * highest power of rad less than or equal to the base value. | + *
| bv>: | + *bv specifies the rule's base value. To calculate the divisor, + * let the radix be 10, and the exponent be the highest exponent of the radix that yields a + * result less than or equal to the base value. Every > character after the base value + * decreases the exponent by 1. If the exponent is positive or 0, the divisor is the radix + * raised to the power of the exponent; otherwise, the divisor is 1. | + *
| bv/rad>: | + *bv specifies the rule's base value. To calculate the divisor, + * let the radix be rad, and the exponent be the highest exponent of the radix that + * yields a result less than or equal to the base value. Every > character after the radix + * decreases the exponent by 1. If the exponent is positive or 0, the divisor is the radix + * raised to the power of the exponent; otherwise, the divisor is 1. | + *
| -x: | + *The rule is a negative-number rule. | + *
| x.x: | + *The rule is an improper fraction rule. | + *
| 0.x: | + *The rule is a proper fraction rule. | + *
| x.0: | + *The rule is a master rule. | + *
| nothing | + *If the rule's rule descriptor is left out, the base value is one plus the + * preceding rule's base value (or zero if this is the first rule in the list) in a normal + * rule set. In a fraction rule set, the base value is the same as the preceding rule's + * base value. | + *
A rule set may be either a regular rule set or a fraction rule set, depending + * on whether it is used to format a number's integral part (or the whole number) or a + * number's fractional part. Using a rule set to format a rule's fractional part makes it a + * fraction rule set.
+ * + *Which rule is used to format a number is defined according to one of the following + * algorithms: If the rule set is a regular rule set, do the following: + * + *
If the rule set is a fraction rule set, do the following: + * + *
A rule's body consists of a string of characters terminated by a semicolon. The rule + * may include zero, one, or two substitution tokens, and a range of text in + * brackets. The brackets denote optional text (and may also include one or both + * substitutions). The exact meanings of the substitution tokens, and under what conditions + * optional text is omitted, depend on the syntax of the substitution token and the context. + * The rest of the text in a rule body is literal text that is output when the rule matches + * the number being formatted.
+ * + *A substitution token begins and ends with a token character. The token + * character and the context together specify a mathematical operation to be performed on the + * number being formatted. An optional substitution descriptor specifies how the + * value resulting from that operation is used to fill in the substitution. The position of + * the substitution token in the rule body specifies the location of the resultant text in + * the original rule text.
+ * + *The meanings of the substitution token characters are as follows:
+ * + *| >> | + *in normal rule | + *Divide the number by the rule's divisor and format the remainder | + *
| + * | in negative-number rule | + *Find the absolute value of the number and format the result | + *
| + * | in fraction or master rule | + *Isolate the number's fractional part and format it. | + *
| + * | in rule in fraction rule set | + *Not allowed. | + *
| >>> | + *in normal rule | + *Divide the number by the rule's divisor and format the remainder, + * but bypass the normal rule-selection process and just use the + * rule that precedes this one in this rule list. | + *
| + * | in all other rules | + *Not allowed. | + *
| << | + *in normal rule | + *Divide the number by the rule's divisor and format the quotient | + *
| + * | in negative-number rule | + *Not allowed. | + *
| + * | in fraction or master rule | + *Isolate the number's integral part and format it. | + *
| + * | in rule in fraction rule set | + *Multiply the number by the rule's base value and format the result. | + *
| == | + *in all rule sets | + *Format the number unchanged | + *
| [] | + *in normal rule | + *Omit the optional text if the number is an even multiple of the rule's divisor | + *
| + * | in negative-number rule | + *Not allowed. | + *
| + * | in improper-fraction rule | + *Omit the optional text if the number is between 0 and 1 (same as specifying both an + * x.x rule and a 0.x rule) | + *
| + * | in master rule | + *Omit the optional text if the number is an integer (same as specifying both an x.x + * rule and an x.0 rule) | + *
| + * | in proper-fraction rule | + *Not allowed. | + *
| + * | in rule in fraction rule set | + *Omit the optional text if multiplying the number by the rule's base value yields 1. | + *
The substitution descriptor (i.e., the text between the token characters) may take one + * of three forms:
+ * + *| a rule set name | + *Perform the mathematical operation on the number, and format the result using the + * named rule set. | + *
| a DecimalFormat pattern | + *Perform the mathematical operation on the number, and format the result using a + * DecimalFormat with the specified pattern. The pattern must begin with 0 or #. | + *
| nothing | + *Perform the mathematical operation on the number, and format the result using the rule
+ * set containing the current rule, except:
+ *
|
+ *
Whitespace is ignored between a rule set name and a rule set body, between a rule + * descriptor and a rule body, or between rules. If a rule body begins with an apostrophe, + * the apostrophe is ignored, but all text after it becomes significant (this is how you can + * have a rule's rule text begin with whitespace). There is no escape function: the semicolon + * is not allowed in rule set names or in rule text, and the colon is not allowed in rule set + * names. The characters beginning a substitution token are always treated as the beginning + * of a substitution token.
+ * + *See the resource data and the demo program for annotated examples of real rule sets + * using these features.
+ * + *User subclasses are not supported. While clients may write + * subclasses, such code will not necessarily work and will not be + * guaranteed to work stably from release to release. + * + *
Localizations
+ *Constructors are available that allow the specification of localizations for the + * public rule sets (and also allow more control over what public rule sets are available). + * Localization data is represented as a textual description. The description represents + * an array of arrays of string. The first element is an array of the public rule set names, + * each of these must be one of the public rule set names that appear in the rules. Only + * names in this array will be treated as public rule set names by the API. Each subsequent + * element is an array of localizations of these names. The first element of one of these + * subarrays is the locale name, and the remaining elements are localizations of the + * public rule set names, in the same order as they were listed in the first arrray.
+ *In the syntax, angle brackets '<', '>' are used to delimit the arrays, and comma ',' is used + * to separate elements of an array. Whitespace is ignored, unless quoted.
+ *For example:
+ * < < %foo, %bar, %baz >, + * < en, Foo, Bar, Baz >, + * < fr, 'le Foo', 'le Bar', 'le Baz' > + * < zh, \\u7532, \\u4e59, \\u4e19 > > + *+ * @author Richard Gillam + * @see NumberFormat + * @see DecimalFormat + * @stable ICU 2.0 + */ +class U_I18N_API RuleBasedNumberFormat : public NumberFormat { +public: + + //----------------------------------------------------------------------- + // constructors + //----------------------------------------------------------------------- + + /** + * Creates a RuleBasedNumberFormat that behaves according to the description + * passed in. The formatter uses the default locale. + * @param rules A description of the formatter's desired behavior. + * See the class documentation for a complete explanation of the description + * syntax. + * @param perror The parse error if an error was encountered. + * @param status The status indicating whether the constructor succeeded. + * @stable ICU 3.2 + */ + RuleBasedNumberFormat(const UnicodeString& rules, UParseError& perror, UErrorCode& status); + + /** + * Creates a RuleBasedNumberFormat that behaves according to the description + * passed in. The formatter uses the default locale. + *
+ * The localizations data provides information about the public + * rule sets and their localized display names for different + * locales. The first element in the list is an array of the names + * of the public rule sets. The first element in this array is + * the initial default ruleset. The remaining elements in the + * list are arrays of localizations of the names of the public + * rule sets. Each of these is one longer than the initial array, + * with the first String being the ULocale ID, and the remaining + * Strings being the localizations of the rule set names, in the + * same order as the initial array. Arrays are NULL-terminated. + * @param rules A description of the formatter's desired behavior. + * See the class documentation for a complete explanation of the description + * syntax. + * @param localizations the localization information. + * names in the description. These will be copied by the constructor. + * @param perror The parse error if an error was encountered. + * @param status The status indicating whether the constructor succeeded. + * @stable ICU 3.2 + */ + RuleBasedNumberFormat(const UnicodeString& rules, const UnicodeString& localizations, + UParseError& perror, UErrorCode& status); + + /** + * Creates a RuleBasedNumberFormat that behaves according to the rules + * passed in. The formatter uses the specified locale to determine the + * characters to use when formatting numerals, and to define equivalences + * for lenient parsing. + * @param rules The formatter rules. + * See the class documentation for a complete explanation of the rule + * syntax. + * @param locale A locale that governs which characters are used for + * formatting values in numerals and which characters are equivalent in + * lenient parsing. + * @param perror The parse error if an error was encountered. + * @param status The status indicating whether the constructor succeeded. + * @stable ICU 2.0 + */ + RuleBasedNumberFormat(const UnicodeString& rules, const Locale& locale, + UParseError& perror, UErrorCode& status); + + /** + * Creates a RuleBasedNumberFormat that behaves according to the description + * passed in. The formatter uses the default locale. + *
+ * The localizations data provides information about the public
+ * rule sets and their localized display names for different
+ * locales. The first element in the list is an array of the names
+ * of the public rule sets. The first element in this array is
+ * the initial default ruleset. The remaining elements in the
+ * list are arrays of localizations of the names of the public
+ * rule sets. Each of these is one longer than the initial array,
+ * with the first String being the ULocale ID, and the remaining
+ * Strings being the localizations of the rule set names, in the
+ * same order as the initial array. Arrays are NULL-terminated.
+ * @param rules A description of the formatter's desired behavior.
+ * See the class documentation for a complete explanation of the description
+ * syntax.
+ * @param localizations a list of localizations for the rule set
+ * names in the description. These will be copied by the constructor.
+ * @param locale A locale that governs which characters are used for
+ * formatting values in numerals and which characters are equivalent in
+ * lenient parsing.
+ * @param perror The parse error if an error was encountered.
+ * @param status The status indicating whether the constructor succeeded.
+ * @stable ICU 3.2
+ */
+ RuleBasedNumberFormat(const UnicodeString& rules, const UnicodeString& localizations,
+ const Locale& locale, UParseError& perror, UErrorCode& status);
+
+ /**
+ * Creates a RuleBasedNumberFormat from a predefined ruleset. The selector
+ * code choosed among three possible predefined formats: spellout, ordinal,
+ * and duration.
+ * @param tag A selector code specifying which kind of formatter to create for that
+ * locale. There are four legal values: URBNF_SPELLOUT, which creates a formatter that
+ * spells out a value in words in the desired language, URBNF_ORDINAL, which attaches
+ * an ordinal suffix from the desired language to the end of a number (e.g. "123rd"),
+ * URBNF_DURATION, which formats a duration in seconds as hours, minutes, and seconds,
+ * and URBNF_NUMBERING_SYSTEM, which is used to invoke rules for alternate numbering
+ * systems such as the Hebrew numbering system, or for Roman Numerals, etc.
+ * @param locale The locale for the formatter.
+ * @param status The status indicating whether the constructor succeeded.
+ * @stable ICU 2.0
+ */
+ RuleBasedNumberFormat(URBNFRuleSetTag tag, const Locale& locale, UErrorCode& status);
+
+ //-----------------------------------------------------------------------
+ // boilerplate
+ //-----------------------------------------------------------------------
+
+ /**
+ * Copy constructor
+ * @param rhs the object to be copied from.
+ * @stable ICU 2.6
+ */
+ RuleBasedNumberFormat(const RuleBasedNumberFormat& rhs);
+
+ /**
+ * Assignment operator
+ * @param rhs the object to be copied from.
+ * @stable ICU 2.6
+ */
+ RuleBasedNumberFormat& operator=(const RuleBasedNumberFormat& rhs);
+
+ /**
+ * Release memory allocated for a RuleBasedNumberFormat when you are finished with it.
+ * @stable ICU 2.6
+ */
+ virtual ~RuleBasedNumberFormat();
+
+ /**
+ * Clone this object polymorphically. The caller is responsible
+ * for deleting the result when done.
+ * @return A copy of the object.
+ * @stable ICU 2.6
+ */
+ virtual Format* clone(void) const;
+
+ /**
+ * Return true if the given Format objects are semantically equal.
+ * Objects of different subclasses are considered unequal.
+ * @param other the object to be compared with.
+ * @return true if the given Format objects are semantically equal.
+ * @stable ICU 2.6
+ */
+ virtual UBool operator==(const Format& other) const;
+
+//-----------------------------------------------------------------------
+// public API functions
+//-----------------------------------------------------------------------
+
+ /**
+ * return the rules that were provided to the RuleBasedNumberFormat.
+ * @return the result String that was passed in
+ * @stable ICU 2.0
+ */
+ virtual UnicodeString getRules() const;
+
+ /**
+ * Return the number of public rule set names.
+ * @return the number of public rule set names.
+ * @stable ICU 2.0
+ */
+ virtual int32_t getNumberOfRuleSetNames() const;
+
+ /**
+ * Return the name of the index'th public ruleSet. If index is not valid,
+ * the function returns null.
+ * @param index the index of the ruleset
+ * @return the name of the index'th public ruleSet.
+ * @stable ICU 2.0
+ */
+ virtual UnicodeString getRuleSetName(int32_t index) const;
+
+ /**
+ * Return the number of locales for which we have localized rule set display names.
+ * @return the number of locales for which we have localized rule set display names.
+ * @stable ICU 3.2
+ */
+ virtual int32_t getNumberOfRuleSetDisplayNameLocales(void) const;
+
+ /**
+ * Return the index'th display name locale.
+ * @param index the index of the locale
+ * @param status set to a failure code when this function fails
+ * @return the locale
+ * @see #getNumberOfRuleSetDisplayNameLocales
+ * @stable ICU 3.2
+ */
+ virtual Locale getRuleSetDisplayNameLocale(int32_t index, UErrorCode& status) const;
+
+ /**
+ * Return the rule set display names for the provided locale. These are in the same order
+ * as those returned by getRuleSetName. The locale is matched against the locales for
+ * which there is display name data, using normal fallback rules. If no locale matches,
+ * the default display names are returned. (These are the internal rule set names minus
+ * the leading '%'.)
+ * @param index the index of the rule set
+ * @param locale the locale (returned by getRuleSetDisplayNameLocales) for which the localized
+ * display name is desired
+ * @return the display name for the given index, which might be bogus if there is an error
+ * @see #getRuleSetName
+ * @stable ICU 3.2
+ */
+ virtual UnicodeString getRuleSetDisplayName(int32_t index,
+ const Locale& locale = Locale::getDefault());
+
+ /**
+ * Return the rule set display name for the provided rule set and locale.
+ * The locale is matched against the locales for which there is display name data, using
+ * normal fallback rules. If no locale matches, the default display name is returned.
+ * @return the display name for the rule set
+ * @stable ICU 3.2
+ * @see #getRuleSetDisplayName
+ */
+ virtual UnicodeString getRuleSetDisplayName(const UnicodeString& ruleSetName,
+ const Locale& locale = Locale::getDefault());
+
+
+ using NumberFormat::format;
+
+ /**
+ * Formats the specified 32-bit number using the default ruleset.
+ * @param number The number to format.
+ * @param toAppendTo the string that will hold the (appended) result
+ * @param pos the fieldposition
+ * @return A textual representation of the number.
+ * @stable ICU 2.0
+ */
+ virtual UnicodeString& format(int32_t number,
+ UnicodeString& toAppendTo,
+ FieldPosition& pos) const;
+
+ /**
+ * Formats the specified 64-bit number using the default ruleset.
+ * @param number The number to format.
+ * @param toAppendTo the string that will hold the (appended) result
+ * @param pos the fieldposition
+ * @return A textual representation of the number.
+ * @stable ICU 2.1
+ */
+ virtual UnicodeString& format(int64_t number,
+ UnicodeString& toAppendTo,
+ FieldPosition& pos) const;
+ /**
+ * Formats the specified number using the default ruleset.
+ * @param number The number to format.
+ * @param toAppendTo the string that will hold the (appended) result
+ * @param pos the fieldposition
+ * @return A textual representation of the number.
+ * @stable ICU 2.0
+ */
+ virtual UnicodeString& format(double number,
+ UnicodeString& toAppendTo,
+ FieldPosition& pos) const;
+
+ /**
+ * Formats the specified number using the named ruleset.
+ * @param number The number to format.
+ * @param ruleSetName The name of the rule set to format the number with.
+ * This must be the name of a valid public rule set for this formatter.
+ * @param toAppendTo the string that will hold the (appended) result
+ * @param pos the fieldposition
+ * @param status the status
+ * @return A textual representation of the number.
+ * @stable ICU 2.0
+ */
+ virtual UnicodeString& format(int32_t number,
+ const UnicodeString& ruleSetName,
+ UnicodeString& toAppendTo,
+ FieldPosition& pos,
+ UErrorCode& status) const;
+ /**
+ * Formats the specified 64-bit number using the named ruleset.
+ * @param number The number to format.
+ * @param ruleSetName The name of the rule set to format the number with.
+ * This must be the name of a valid public rule set for this formatter.
+ * @param toAppendTo the string that will hold the (appended) result
+ * @param pos the fieldposition
+ * @param status the status
+ * @return A textual representation of the number.
+ * @stable ICU 2.1
+ */
+ virtual UnicodeString& format(int64_t number,
+ const UnicodeString& ruleSetName,
+ UnicodeString& toAppendTo,
+ FieldPosition& pos,
+ UErrorCode& status) const;
+ /**
+ * Formats the specified number using the named ruleset.
+ * @param number The number to format.
+ * @param ruleSetName The name of the rule set to format the number with.
+ * This must be the name of a valid public rule set for this formatter.
+ * @param toAppendTo the string that will hold the (appended) result
+ * @param pos the fieldposition
+ * @param status the status
+ * @return A textual representation of the number.
+ * @stable ICU 2.0
+ */
+ virtual UnicodeString& format(double number,
+ const UnicodeString& ruleSetName,
+ UnicodeString& toAppendTo,
+ FieldPosition& pos,
+ UErrorCode& status) const;
+
+ using NumberFormat::parse;
+
+ /**
+ * Parses the specfied string, beginning at the specified position, according
+ * to this formatter's rules. This will match the string against all of the
+ * formatter's public rule sets and return the value corresponding to the longest
+ * parseable substring. This function's behavior is affected by the lenient
+ * parse mode.
+ * @param text The string to parse
+ * @param result the result of the parse, either a double or a long.
+ * @param parsePosition On entry, contains the position of the first character
+ * in "text" to examine. On exit, has been updated to contain the position
+ * of the first character in "text" that wasn't consumed by the parse.
+ * @see #setLenient
+ * @stable ICU 2.0
+ */
+ virtual void parse(const UnicodeString& text,
+ Formattable& result,
+ ParsePosition& parsePosition) const;
+
+#if !UCONFIG_NO_COLLATION
+
+ /**
+ * Turns lenient parse mode on and off.
+ *
+ * When in lenient parse mode, the formatter uses a Collator for parsing the text.
+ * Only primary differences are treated as significant. This means that case
+ * differences, accent differences, alternate spellings of the same letter
+ * (e.g., ae and a-umlaut in German), ignorable characters, etc. are ignored in
+ * matching the text. In many cases, numerals will be accepted in place of words
+ * or phrases as well.
+ *
+ * For example, all of the following will correctly parse as 255 in English in
+ * lenient-parse mode:
+ *
"two hundred fifty-five"
+ *
"two hundred fifty five"
+ *
"TWO HUNDRED FIFTY-FIVE"
+ *
"twohundredfiftyfive"
+ *
"2 hundred fifty-5"
+ *
+ * The Collator used is determined by the locale that was
+ * passed to this object on construction. The description passed to this object
+ * on construction may supply additional collation rules that are appended to the
+ * end of the default collator for the locale, enabling additional equivalences
+ * (such as adding more ignorable characters or permitting spelled-out version of
+ * symbols; see the demo program for examples).
+ *
+ * It's important to emphasize that even strict parsing is relatively lenient: it
+ * will accept some text that it won't produce as output. In English, for example,
+ * it will correctly parse "two hundred zero" and "fifteen hundred".
+ *
+ * @param enabled If true, turns lenient-parse mode on; if false, turns it off.
+ * @see RuleBasedCollator
+ * @stable ICU 2.0
+ */
+ virtual void setLenient(UBool enabled);
+
+ /**
+ * Returns true if lenient-parse mode is turned on. Lenient parsing is off
+ * by default.
+ * @return true if lenient-parse mode is turned on.
+ * @see #setLenient
+ * @stable ICU 2.0
+ */
+ virtual inline UBool isLenient(void) const;
+
+#endif
+
+ /**
+ * Override the default rule set to use. If ruleSetName is null, reset
+ * to the initial default rule set. If the rule set is not a public rule set name,
+ * U_ILLEGAL_ARGUMENT_ERROR is returned in status.
+ * @param ruleSetName the name of the rule set, or null to reset the initial default.
+ * @param status set to failure code when a problem occurs.
+ * @stable ICU 2.6
+ */
+ virtual void setDefaultRuleSet(const UnicodeString& ruleSetName, UErrorCode& status);
+
+ /**
+ * Return the name of the current default rule set. If the current rule set is
+ * not public, returns a bogus (and empty) UnicodeString.
+ * @return the name of the current default rule set
+ * @stable ICU 3.0
+ */
+ virtual UnicodeString getDefaultRuleSetName() const;
+
+public:
+ /**
+ * ICU "poor man's RTTI", returns a UClassID for this class.
+ *
+ * @stable ICU 2.8
+ */
+ static UClassID U_EXPORT2 getStaticClassID(void);
+
+ /**
+ * ICU "poor man's RTTI", returns a UClassID for the actual class.
+ *
+ * @stable ICU 2.8
+ */
+ virtual UClassID getDynamicClassID(void) const;
+
+ /**
+ * Sets the decimal format symbols, which is generally not changed
+ * by the programmer or user. The formatter takes ownership of
+ * symbolsToAdopt; the client must not delete it.
+ *
+ * @param symbolsToAdopt DecimalFormatSymbols to be adopted.
+ * @stable ICU 49
+ */
+ virtual void adoptDecimalFormatSymbols(DecimalFormatSymbols* symbolsToAdopt);
+
+ /**
+ * Sets the decimal format symbols, which is generally not changed
+ * by the programmer or user. A clone of the symbols is created and
+ * the symbols is _not_ adopted; the client is still responsible for
+ * deleting it.
+ *
+ * @param symbols DecimalFormatSymbols.
+ * @stable ICU 49
+ */
+ virtual void setDecimalFormatSymbols(const DecimalFormatSymbols& symbols);
+
+private:
+ RuleBasedNumberFormat(); // default constructor not implemented
+
+ // this will ref the localizations if they are not NULL
+ // caller must deref to get adoption
+ RuleBasedNumberFormat(const UnicodeString& description, LocalizationInfo* localizations,
+ const Locale& locale, UParseError& perror, UErrorCode& status);
+
+ void init(const UnicodeString& rules, LocalizationInfo* localizations, UParseError& perror, UErrorCode& status);
+ void dispose();
+ void stripWhitespace(UnicodeString& src);
+ void initDefaultRuleSet();
+ void format(double number, NFRuleSet& ruleSet);
+ NFRuleSet* findRuleSet(const UnicodeString& name, UErrorCode& status) const;
+
+ /* friend access */
+ friend class NFSubstitution;
+ friend class NFRule;
+ friend class FractionalPartSubstitution;
+
+ inline NFRuleSet * getDefaultRuleSet() const;
+ Collator * getCollator() const;
+ DecimalFormatSymbols * getDecimalFormatSymbols() const;
+
+private:
+ NFRuleSet **ruleSets;
+ UnicodeString* ruleSetDescriptions;
+ int32_t numRuleSets;
+ NFRuleSet *defaultRuleSet;
+ Locale locale;
+ Collator* collator;
+ DecimalFormatSymbols* decimalFormatSymbols;
+ UBool lenient;
+ UnicodeString* lenientParseRules;
+ LocalizationInfo* localizations;
+};
+
+// ---------------
+
+#if !UCONFIG_NO_COLLATION
+
+inline UBool
+RuleBasedNumberFormat::isLenient(void) const {
+ return lenient;
+}
+
+#endif
+
+inline NFRuleSet*
+RuleBasedNumberFormat::getDefaultRuleSet() const {
+ return defaultRuleSet;
+}
+
+U_NAMESPACE_END
+
+/* U_HAVE_RBNF */
+#endif
+
+/* RBNF_H */
+#endif