GIF89a=( õ' 7IAXKgNgYvYx\%wh…hŽth%ˆs%—x¨}9®Œ©€&©‰%¶†(¹–.¹5·œD¹&Çš)ÇŸ5ǘ;Í£*È¡&Õ²)ׯ7×µ<Ñ»4ï°3ø‘HÖ§KͯT÷¨Yÿšqÿ»qÿÔFØ !ù ' !ÿ NETSCAPE2.0 , =( þÀ“pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§gª«ªE¯°¨¬ª±²Œ¹º¹E¾­”´ÂB¶¯ §Åȸ»ÑD¾¿Á•ÄÅ®° ÝH¾ÒLÀÆDÙ«D¶BÝïðÀ¾DÑÑÔTÌÍíH òGö¨A RÎڐ |¥ ٭&ºìE8œ¹kGÔAÞpx­a¶­ã R2XB®åE8I€Õ6Xî:vT)äžþÀq¦è³¥ì仕F~%xñ  4#ZÔ‰O|-4Bs‘X:= QÉ œš lºÒyXJŠGȦ|s hÏíK–3l7·B|¥$'7Jީܪ‰‡àá”Dæn=Pƒ ¤Òëí‰`䌨ljóá¯Éüv>á–Á¼5 ½.69ûϸd«­ºÀûnlv©‹ªîf{¬ÜãPbŸ  l5‘Ž¯pß ´ ˜3aÅùäI«O’ý·‘áÞ‡˜¾Æ‚ÙÏiÇÿ‹Àƒ #öó)pâš Þ½ ‘Ý{ó)vmÞü%D~ 6f s}ŃƒDØW Eþ`‡þ À…L8xá†ç˜{)x`X/> Ì}mø‚–RØ‘*|`D=‚Ø_ ^ð5 !_…'aä“OÚ—7âcð`D”Cx`ÝÂ¥ä‹éY¹—F¼¤¥Š?¡Õ™ n@`} lď’ÄÉ@4>ñd œ à‘vÒxNÃ×™@žd=ˆgsžG±æ ´²æud &p8Qñ)ˆ«lXD©øÜéAžHìySun jª×k*D¤LH] †¦§C™Jä–´Xb~ʪwStŽ6K,°£qÁœ:9ت:¨þªl¨@¡`‚ûÚ ».Û¬¯t‹ÆSÉ[:°=Š‹„‘Nåû”Ìî{¿ÂA ‡Rà›ÀÙ6úë°Ÿð0Ä_ ½;ÃϱîÉì^ÇÛÇ#Ëë¼ôº!±Ä˜íUîÅÇ;0L1óÁµö«p% AÀºU̬ݵ¼á%霼€‡¯Á~`ÏG¯»À× ­²± =4ªnpð3¾¤³¯­ü¾¦îuÙuµÙ®|%2ÊIÿür¦#0·ÔJ``8È@S@5ê¢ ö×Þ^`8EÜ]ý.뜃Âç 7 ú ȉÞj œ½Dç zý¸iþœÑÙûÄë!ˆÞÀl§Ïw‹*DçI€nEX¯¬¼ &A¬Go¼QföõFç°¯;é¦÷îŽêJ°îúôF5¡ÌQ|îúöXªæ»TÁÏyñêï]ê² o óÎC=öõ›ÒÓPB@ D×½œä(>èCÂxŽ`±«Ÿ–JЀ»Û á¤±p+eE0`ëŽ`A Ú/NE€Ø†À9‚@¤à H½7”à‡%B‰`Àl*ƒó‘–‡8 2ñ%¸ —€:Ù1Á‰E¸àux%nP1ð!‘ðC)¾P81lÑɸF#ˆ€{´âé°ÈB„0>±û °b¡Š´±O‚3È–Ù()yRpbµ¨E.Z‘D8ÊH@% òŒx+%Ù˜Æcü »¸˜fõ¬b·d`Fê™8èXH"ÉÈ-±|1Ô6iI, 2““¬$+](A*jÐ QTÂo‰.ÛU슬Œã„Ž`¯SN¡–¶Äåyše¯ª’­¬‚´b¦Éož œ)åyâ@Ì®3 ÎtT̉°&Ø+žLÀf"Ø-|žçÔ>‡Ðv¦Ðžì\‚ Q1)Ž@Žh#aP72”ˆ™¨$‚ !ù " , =( …7IAXG]KgNgYvYxR"k\%w]'}hŽth%ˆg+ˆs%—r.—m3šx3˜x¨}9®€&©€+¨‡7§‰%¶†(¹–.¹œD¹&ǘ;Í•&ײ)×»4ïÌ6ò§KÍ þ@‘pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§g «¬ E ±± ¨­¶°ººE Á´”·®C¬²§Ç¶Œ»ÓDÃÕƷ¯Ê±H½ºM×ÁGÚ¬D¶BËÁ½î½DÓôTÏÛßîG»ôõC×CÌ l&âž:'òtU³6ɹ#·Ø)€'Ü.6±&ëÍÈ» K(8p0N?!æ2"ÛˆNIJX>R¼ÐO‚M '¡¨2¸*Ÿþ>#n↠å@‚<[:¡Iïf’ ¤TÚ˘CdbÜÙ“[«ŽEú5MBo¤×@€`@„€Êt W-3 ¶Ÿ¡BíêäjIÝ…Eò9[T…$íêﯧ„…•s»Óȳ¹€ÅÚdc®UUρ#±Ùïldj?´í¼²`\ŽÁðÞu|3'ÖŒ]ë6 ¶S#²‡˜FKLÈ *N E´‘áäŠ$˜›eÄYD„ºq«.è촁ƒs \-ÔjA 9²õ÷å- üúM[Âx(ís÷ì®x€|í¡Ù’p¦‚ ŽkÛTÇDpE@WÜ ²Ç]kŠ1¨ þ€·Yb ÓÁ‰l°*n0 ç™—žzBdОu¾7ĉBl€â‰-ºx~|UåU‰  h*Hœ|e"#"?vpÄiŠe6^ˆ„+qâŠm8 #VÇá ‘å–ÄV„œ|Šè•m"сœn|@›U¶ÆΞ—Špb¥G¨ED”€±Úê2FÌIç? >Éxå Œ± ¡¤„%‘žjŸ‘ꄯ<Ìaà9ijÐ2˜D¦È&›†Z`‚å]wþ¼Â:ç6àB¤7eFJ|õÒ§Õ,¨äàFÇ®cS·Ê¶+B°,‘Þ˜ºNûãØ>PADÌHD¹æž«ÄÀnÌ¥}­#Ë’ë QÀÉSÌÂÇ2ÌXÀ{æk²lQÁ2«ÊðÀ¯w|2Í h‹ÄÂG€,m¾¶ë3ÐÙ6-´ÅE¬L°ÆIij*K½ÀÇqï`DwVÍQXœÚÔpeœ±¬Ñ q˜§Tœ½µƒ°Œìu Â<¶aØ*At¯lmEØ ü ôÛN[P1ÔÛ¦­±$ÜÆ@`ùåDpy¶yXvCAyåB`ŽD¶ 0QwG#¯ æš[^Äþ $ÀÓÝǦ{„L™[±úKÄgÌ;ï£S~¹ìGX.ôgoT.»åˆ°ùŸûù¡?1zö¦Ÿž:ÅgÁ|ìL¹ „®£œŠ‚à0œ]PÁ^p F<"•ç?!,ñ‡N4—…PÄ Á„ö¨Û:Tè@hÀ‹%táÿ:ø-žI<`þ‹p I….)^ 40D#p@ƒj4–؀:²‰1Øâr˜¼F2oW¼#Z†;$Q q” ‘ ÂK¦ñNl#29 !’F@¥Bh·ᏀL!—XFóLH‘Kh¤.«hE&JòG¨¥<™WN!€ÑÙÚˆY„@†>Œž19J" 2,/ &.GXB%ÌRÈ9B6¹W]’î×ÔW¥’IÎ$ ñ‹ÓŒE8YÆ ¼³™ñA5“à®Q.aŸB€&Ø©³ JÁ—! ¦t)K%tœ-¦JF bòNMxLôþ)ÐR¸Ð™‘ èÝ6‘O!THÌ„HÛ ‰ !ù ) , =( …AXKgNgYvYxR"k\%wh…hŽh%ˆg+ˆs%—r.—x3˜x¨}9®€&©€+¨Œ,©‡7§‰%¶†(¹–.¹5·&Çš)ǘ;Í•&×£*Ȳ)ׯ7×»4ï°3øÌ6ò‘HÖ§KÍ»Hó¯T÷¨Yÿ»qÿÇhÿ þÀ”pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§g ª« E$±²¨ª­ · °²½$E$ÂÕ««D· Í ¿¦Ç¶¸ÌŒ¾³CÃÅÆ E ééH½MÛÂGâªD­ çBêêϾD²ÒaÀà€Š1r­ðÓ¤ ÔožzU!L˜C'¾yW½UGtäÇïÙllê0×àÂuGþ)AÀs[þ·xì ÁxO%ƒûX2ó—  P£n›R/¡ÑšHše+êDm?# —‘Ç£6¡8íJ¡ŸâDiäªM¥Ö„ôj“¬¹£5oQ7°- <‡ *´lãÓŒ2r/a!l)dÈ A™ÈE¢ôÔ͆…ð ;Ö˜c ¡%ß‚’Ùˆâ¸b½—pe~C"BíëÚHïeF2§æŠ8qb t_`urŠeü wÅu3êæPv§h•"ß`íÍxçLĹÜÖ3á  ~Öº“®›¸ÏMDfJÙ °„ÛµáWõ%§œ‚à©–‚X Ó؁)@®Ñ›Eþ´wëuÅSxb8y\mÖzœ¥§ZbºE—ÂLªÌw!y(>¡™wú=Ç|ÅÝs¢d €CÁW)HÜcC$€L Ä7„r.á\{)@ð` @ äXÈ$PD” `šaG:§æˆOˆ72EÐamn]ù"ŒcÊxÑŒ° &dR8`g«iÙŸLR!¦P …d’ä¡“¦ðÎTƒ¦ià|À _ ¥ Qi#¦Šg›Æ ›noMµ ›V ã£)p ç£ÎW…š=Âeªk§†j„ ´®1ß²sÉxéW«jšl|0¯B0Û, \jÛ´›6±¬¶C ÛíWþï|ëÙ‹¸ñzĸV {ì;Ýñn¼òVˆm³I¼³.Ðã¤PN¥ ²µ¼„µCã+¹ÍByî£Ñ¾HŸ›ëê 7ìYÆFTk¨SaoaY$Dµœìï¿Ã29RÈkt Çïfñ ÇÒ:ÀÐSp¹3ÇI¨â¥DZÄ ü9Ïýögñ½­uÔ*3)O‘˜Ö[_hv ,àî×Et Ÿé¶BH€ Õ[ü±64M@ÔSÌM7dÐl5-ÄÙU܍´©zߌ3Ô€3ž„ „ ¶ÛPô½5×g› êÚ˜kN„Ý…0Îj4€Ìë°“#{þÕ3S2çKÜ'ợlø¼Ú2K{° {Û¶?žm𸧠ËI¼nEò='êüóºè^üæÃ_Û=°óž‚ì#Oý¿Í'¡½áo..ÏYìnüñCœO±Áa¿¢Kô½o,üÄËbö²çºíï{ËC Ú— "”Ï{ËK ÍÒw„õ±Oz dÕ¨à:$ ƒô—«v»] A#ð «€¿šéz)Rx׿ˆ¥‚d``èw-îyÏf×K!ð€þ­Ð|ìPľ„=Ì`ý(f” 'Pa ¥ÐBJa%Ðâf§„%Š¡}FàáÝ×6>ÉäŠG"éŽè=ø!oŠ°^FP¼Ø©Q„ÀCÙÁ`(Ž\ÄÝ® ©Â$<n@dÄ E#ììUÒI! ‚#lù‹`k¦ÐÇ'Rró’ZýNBÈMF Í[¤+‹ðɈ-áwj¨¥þ8¾rá ,VÂh„"|½œ=×G_¦Ñ™EØ 0i*%̲˜Æda0mV‚k¾)›;„&6 p>ÓjK “¦Ç# âDÂ:ûc?:R Ó¬fÞéI-Ì“•Ã<ä=™Ï7˜3œ¨˜c2ŒW ,ˆ”8(T™P‰F¡Jhç"‚ ; 403WebShell
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Current File : /opt/alt/alt-nodejs22/root/usr/include/unicode/messageformat2.h
// © 2024 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

#include "unicode/utypes.h"

#ifndef MESSAGEFORMAT2_H
#define MESSAGEFORMAT2_H

#if U_SHOW_CPLUSPLUS_API

#if !UCONFIG_NO_NORMALIZATION

#if !UCONFIG_NO_FORMATTING

#if !UCONFIG_NO_MF2

/**
 * \file
 * \brief C++ API: Formats messages using the draft MessageFormat 2.0.
 */

#include "unicode/messageformat2_arguments.h"
#include "unicode/messageformat2_data_model.h"
#include "unicode/messageformat2_function_registry.h"
#include "unicode/normalizer2.h"
#include "unicode/unistr.h"

#ifndef U_HIDE_DEPRECATED_API

U_NAMESPACE_BEGIN

namespace message2 {

    class Environment;
    class MessageContext;
    class StaticErrors;
    class InternalValue;

    /**
     * <p>MessageFormatter is a Technical Preview API implementing MessageFormat 2.0.
     *
     * <p>See <a target="github" href="https://github.com/unicode-org/message-format-wg/blob/main/spec/syntax.md">the
     * description of the syntax with examples and use cases</a> and the corresponding
     * <a target="github" href="https://github.com/unicode-org/message-format-wg/blob/main/spec/message.abnf">ABNF</a> grammar.</p>
     *
     * The MessageFormatter class is mutable and movable. It is not copyable.
     * (It is mutable because if it has a custom function registry, the registry may include
     * `FormatterFactory` objects implementing custom formatters, which are allowed to contain
     * mutable state.)
     *
     * @internal ICU 75 technology preview
     * @deprecated This API is for technology preview only.
     */
    class U_I18N_API MessageFormatter : public UObject {
        // Note: This class does not currently inherit from the existing
        // `Format` class.
    public:
        /**
         * Move assignment operator:
         * The source MessageFormatter will be left in a valid but undefined state.
         *
         * @internal ICU 75 technology preview
         * @deprecated This API is for technology preview only.
         */
        MessageFormatter& operator=(MessageFormatter&&) noexcept;
        /**
         * Destructor.
         *
         * @internal ICU 75 technology preview
         * @deprecated This API is for technology preview only.
         */
        virtual ~MessageFormatter();

        /**
         * Formats the message to a string, using the data model that was previously set or parsed,
         * and the given `arguments` object.
         *
         * @param arguments Reference to message arguments
         * @param status    Input/output error code used to indicate syntax errors, data model
         *                  errors, resolution errors, formatting errors, selection errors, as well
         *                  as other errors (such as memory allocation failures). Partial output
         *                  is still provided in the presence of most error types.
         * @return          The string result of formatting the message with the given arguments.
         *
         * @internal ICU 75 technology preview
         * @deprecated This API is for technology preview only.
         */
        UnicodeString formatToString(const MessageArguments& arguments, UErrorCode &status);

        /**
         * Not yet implemented; formats the message to a `FormattedMessage` object,
         * using the data model that was previously set or parsed,
         * and the given `arguments` object.
         *
         * @param arguments Reference to message arguments
         * @param status    Input/output error code used to indicate syntax errors, data model
         *                  errors, resolution errors, formatting errors, selection errors, as well
         *                  as other errors (such as memory allocation failures). Partial output
         *                  is still provided in the presence of most error types.
         * @return          The `FormattedMessage` representing the formatted message.
         *
         * @internal ICU 75 technology preview
         * @deprecated This API is for technology preview only.
         */
        FormattedMessage format(const MessageArguments& arguments, UErrorCode &status) const {
            (void) arguments;
            if (U_SUCCESS(status)) {
                status = U_UNSUPPORTED_ERROR;
            }
            return FormattedMessage(status);
        }

        /**
         * Accesses the locale that this `MessageFormatter` object was created with.
         *
         * @return A reference to the locale.
         *
         * @internal ICU 75 technology preview
         * @deprecated This API is for technology preview only.
         */
        const Locale& getLocale() const { return locale; }

        /**
         * Serializes the data model as a string in MessageFormat 2.0 syntax.
         *
         * @return result    A string representation of the data model.
         *                   The string is a valid MessageFormat 2.0 message.
         *
         * @internal ICU 75 technology preview
         * @deprecated This API is for technology preview only.
         */
        UnicodeString getPattern() const;

        /**
         * Accesses the data model referred to by this
         * `MessageFormatter` object.
         *
         * @return A reference to the data model.
         *
         * @internal ICU 75 technology preview
         * @deprecated This API is for technology preview only.
         */
        const MFDataModel& getDataModel() const;

        /**
         * Used in conjunction with the
         * MessageFormatter::Builder::setErrorHandlingBehavior() method.
         *
         * @internal ICU 76 technology preview
         * @deprecated This API is for technology preview only.
         */
        typedef enum UMFErrorHandlingBehavior {
            /**
             * Suppress errors and return best-effort output.
             *
             * @internal ICU 76 technology preview
             * @deprecated This API is for technology preview only.
             */
            U_MF_BEST_EFFORT = 0,
            /**
             * Signal all MessageFormat errors using the UErrorCode
             * argument.
             *
             * @internal ICU 76 technology preview
             * @deprecated This API is for technology preview only.
             */
            U_MF_STRICT
        } UMFErrorHandlingBehavior;

        /**
         * The mutable Builder class allows each part of the MessageFormatter to be initialized
         * separately; calling its `build()` method yields an immutable MessageFormatter.
         *
         * Not copyable or movable.
         */
        class U_I18N_API Builder : public UObject {
        private:
            friend class MessageFormatter;

            // The pattern to be parsed to generate the formatted message
            UnicodeString pattern;
            bool hasPattern = false;
            bool hasDataModel = false;
            // The data model to be used to generate the formatted message
            // Initialized either by `setDataModel()`, or by the parser
            // through a call to `setPattern()`
            MFDataModel dataModel;
            // Normalized representation of the pattern;
            // ignored if `setPattern()` wasn't called
            UnicodeString normalizedInput;
            // Errors (internal representation of parse errors)
            // Ignored if `setPattern()` wasn't called
            StaticErrors* errors;
            Locale locale;
            // Not owned
            const MFFunctionRegistry* customMFFunctionRegistry;
            // Error behavior; see comment in `MessageFormatter` class
            bool signalErrors = false;

            void clearState();
        public:
            /**
             * Sets the locale to use for formatting.
             *
             * @param locale The desired locale.
             * @return       A reference to the builder.
             *
             * @internal ICU 75 technology preview
             * @deprecated This API is for technology preview only.
             */
            Builder& setLocale(const Locale& locale);
            /**
             * Sets the pattern (contents of the message) and parses it
             * into a data model. If a data model was
             * previously set, it is removed.
             *
             * @param pattern A string in MessageFormat 2.0 syntax.
             * @param parseError Struct to receive information on the position
             *                   of an error within the pattern.
             * @param status    Input/output error code. If the
             *                  pattern cannot be parsed, set to failure code.
             * @return       A reference to the builder.
             *
             * @internal ICU 75 technology preview
             * @deprecated This API is for technology preview only.
             */
            Builder& setPattern(const UnicodeString& pattern, UParseError& parseError, UErrorCode& status);
            /**
             * Sets a custom function registry.
             *
             * @param functionRegistry Reference to the function registry to use.
             *        `functionRegistry` is not copied,
             *        and the caller must ensure its lifetime contains
             *        the lifetime of the `MessageFormatter` object built by this
             *        builder.
             * @return       A reference to the builder.
             *
             * @internal ICU 75 technology preview
             * @deprecated This API is for technology preview only.
             */
            Builder& setFunctionRegistry(const MFFunctionRegistry& functionRegistry);
            /**
             * Sets a data model. If a pattern was previously set, it is removed.
             *
             * @param dataModel Data model to format. Passed by move.
             * @return       A reference to the builder.
             *
             * @internal ICU 75 technology preview
             * @deprecated This API is for technology preview only.
             */
            Builder& setDataModel(MFDataModel&& dataModel);
            /**
             * Set the error handling behavior for this formatter.
             *
             * "Strict" error behavior means that that formatting methods
             * will set their UErrorCode arguments to signal MessageFormat
             * data model, resolution, and runtime errors. Syntax errors are
             * always signaled.
             *
             * "Best effort" error behavior means that MessageFormat errors are
             * suppressed:  formatting methods will _not_ set their
             * UErrorCode arguments to signal MessageFormat data model,
             * resolution, or runtime errors. Best-effort output
             * will be returned. Syntax errors are always signaled.
             * This is the default behavior.
             *
             * @param type An enum with type UMFErrorHandlingBehavior;
             *             if type == `U_MF_STRICT`, then
             *             errors are handled strictly.
             *             If type == `U_MF_BEST_EFFORT`, then
             *             best-effort output is returned.
             *
             * The default is to suppress all MessageFormat errors
             * and return best-effort output.
             *
             * @return       A reference to the builder.
             *
             * @internal ICU 76 technology preview
             * @deprecated This API is for technology preview only.
             */
            Builder& setErrorHandlingBehavior(UMFErrorHandlingBehavior type);
            /**
             * Constructs a new immutable MessageFormatter using the pattern or data model
             * that was previously set, and the locale (if it was previously set)
             * or default locale (otherwise).
             *
             * The builder object (`this`) can still be used after calling `build()`.
             *
             * @param status    Input/output error code.  If neither the pattern
             *                  nor the data model is set, set to failure code.
             * @return          The new MessageFormatter object
             *
             * @internal ICU 75 technology preview
             * @deprecated This API is for technology preview only.
             */
            MessageFormatter build(UErrorCode& status) const;
            /**
             * Default constructor.
             * Returns a Builder with the default locale and with no
             * data model or pattern set. Either `setPattern()`
             * or `setDataModel()` has to be called before calling `build()`.
             *
             * @param status    Input/output error code.
             *
             * @internal ICU 75 technology preview
             * @deprecated This API is for technology preview only.
             */
            Builder(UErrorCode& status);
            /**
             * Destructor.
             *
             * @internal ICU 75 technology preview
             * @deprecated This API is for technology preview only.
             */
            virtual ~Builder();
        }; // class MessageFormatter::Builder

        // TODO: Shouldn't be public; only used for testing
        /**
         * Returns a string consisting of the input with optional spaces removed.
         *
         * @return        A normalized string representation of the input
         *
         * @internal ICU 75 technology preview
         * @deprecated This API is for technology preview only.
         */
        const UnicodeString& getNormalizedPattern() const { return normalizedInput; }

    private:
        friend class Builder;
        friend class Checker;
        friend class MessageArguments;
        friend class MessageContext;

        MessageFormatter(const MessageFormatter::Builder& builder, UErrorCode &status);

        MessageFormatter() = delete; // default constructor not implemented

        // Do not define default assignment operator
        const MessageFormatter &operator=(const MessageFormatter &) = delete;

        // Selection methods

        // Takes a vector of FormattedPlaceholders
        void resolveSelectors(MessageContext&, const Environment& env, UErrorCode&, UVector&) const;
        // Takes a vector of vectors of strings (input) and a vector of PrioritizedVariants (output)
        void filterVariants(const UVector&, UVector&, UErrorCode&) const;
        // Takes a vector of vectors of strings (input) and a vector of PrioritizedVariants (input/output)
        void sortVariants(const UVector&, UVector&, UErrorCode&) const;
        // Takes a vector of strings (input) and a vector of strings (output)
        void matchSelectorKeys(const UVector&, MessageContext&, InternalValue* rv, UVector&, UErrorCode&) const;
        // Takes a vector of FormattedPlaceholders (input),
        // and a vector of vectors of strings (output)
        void resolvePreferences(MessageContext&, UVector&, UVector&, UErrorCode&) const;

        // Formatting methods

        // Used for normalizing variable names and keys for comparison
        UnicodeString normalizeNFC(const UnicodeString&) const;
        [[nodiscard]] FormattedPlaceholder formatLiteral(const data_model::Literal&) const;
        void formatPattern(MessageContext&, const Environment&, const data_model::Pattern&, UErrorCode&, UnicodeString&) const;
        // Evaluates a function call
        // Dispatches on argument type
        [[nodiscard]] InternalValue* evalFunctionCall(FormattedPlaceholder&& argument,
                                                     MessageContext& context,
                                                     UErrorCode& status) const;
        // Dispatches on function name
        [[nodiscard]] InternalValue* evalFunctionCall(const FunctionName& functionName,
                                                     InternalValue* argument,
                                                     FunctionOptions&& options,
                                                     MessageContext& context,
                                                     UErrorCode& status) const;
        // Formats an expression that appears in a pattern or as the definition of a local variable
        [[nodiscard]] InternalValue* formatExpression(const Environment&,
                                                     const data_model::Expression&,
                                                     MessageContext&,
                                                     UErrorCode&) const;
        [[nodiscard]] FunctionOptions resolveOptions(const Environment& env, const OptionMap&, MessageContext&, UErrorCode&) const;
        [[nodiscard]] InternalValue* formatOperand(const Environment&, const data_model::Operand&, MessageContext&, UErrorCode&) const;
        [[nodiscard]] FormattedPlaceholder evalArgument(const data_model::VariableName&, MessageContext&, UErrorCode&) const;
        void formatSelectors(MessageContext& context, const Environment& env, UErrorCode &status, UnicodeString& result) const;

        // Function registry methods
        bool hasCustomMFFunctionRegistry() const {
            return (customMFFunctionRegistry != nullptr);
        }

        // Precondition: custom function registry exists
        // Note: this is non-const because the values in the MFFunctionRegistry are mutable
        // (a FormatterFactory can have mutable state)
        const MFFunctionRegistry& getCustomMFFunctionRegistry() const;

        bool isCustomFormatter(const FunctionName&) const;
        FormatterFactory* lookupFormatterFactory(const FunctionName&, UErrorCode& status) const;
        bool isBuiltInSelector(const FunctionName&) const;
        bool isBuiltInFormatter(const FunctionName&) const;
        bool isCustomSelector(const FunctionName&) const;
        const SelectorFactory* lookupSelectorFactory(MessageContext&, const FunctionName&, UErrorCode&) const;
        bool isSelector(const FunctionName& fn) const { return isBuiltInSelector(fn) || isCustomSelector(fn); }
        bool isFormatter(const FunctionName& fn) const { return isBuiltInFormatter(fn) || isCustomFormatter(fn); }
        const Formatter* lookupFormatter(const FunctionName&, UErrorCode&) const;

        Selector* getSelector(MessageContext&, const FunctionName&, UErrorCode&) const;
        Formatter* getFormatter(const FunctionName&, UErrorCode&) const;
        bool getDefaultFormatterNameByType(const UnicodeString&, FunctionName&) const;

        // Checking for resolution errors
        void checkDeclarations(MessageContext&, Environment*&, UErrorCode&) const;
        void check(MessageContext&, const Environment&, const data_model::Expression&, UErrorCode&) const;
        void check(MessageContext&, const Environment&, const data_model::Operand&, UErrorCode&) const;
        void check(MessageContext&, const Environment&, const OptionMap&, UErrorCode&) const;

        void initErrors(UErrorCode&);
        void clearErrors() const;
        void cleanup() noexcept;

        // The locale this MessageFormatter was created with
        /* const */ Locale locale;

        // Registry for built-in functions
        MFFunctionRegistry standardMFFunctionRegistry;
        // Registry for custom functions; may be null if no custom registry supplied
        // Note: this is *not* owned by the MessageFormatter object
        // The reason for this choice is to have a non-destructive MessageFormatter::Builder,
        // while also not requiring the function registry to be deeply-copyable. Making the
        // function registry copyable would impose a requirement on any implementations
        // of the FormatterFactory and SelectorFactory interfaces to implement a custom
        // clone() method, which is necessary to avoid sharing between copies of the
        // function registry (and thus double-frees)
        // Not deeply immutable (the values in the function registry are mutable,
        // as a FormatterFactory can have mutable state
        const MFFunctionRegistry* customMFFunctionRegistry;

        // Data model, representing the parsed message
        MFDataModel dataModel;

        // Normalized version of the input string (optional whitespace removed)
        UnicodeString normalizedInput;

        // Errors -- only used while parsing and checking for data model errors; then
        // the MessageContext keeps track of errors
        // Must be a raw pointer to avoid including the internal header file
        // defining StaticErrors
        // Owned by `this`
        StaticErrors* errors = nullptr;

        // Error handling behavior.
        // If true, then formatting methods set their UErrorCode arguments
        // to signal MessageFormat errors, and no useful output is returned.
        // If false, then MessageFormat errors are not signaled and the
        // formatting methods return best-effort output.
        // The default is false.
        bool signalErrors = false;

        // Used for implementing normalizeNFC()
        const Normalizer2* nfcNormalizer = nullptr;

    }; // class MessageFormatter

} // namespace message2

U_NAMESPACE_END

#endif // U_HIDE_DEPRECATED_API

#endif /* #if !UCONFIG_NO_MF2 */

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif /* #if !UCONFIG_NO_NORMALIZATION */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // MESSAGEFORMAT2_H

// eof

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