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alphaindex.h	26.54 KB	-rw-r--r--
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calendar.h	107.68 KB	-rw-r--r--
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casemap.h	25.42 KB	-rw-r--r--
char16ptr.h	7.22 KB	-rw-r--r--
chariter.h	23.79 KB	-rw-r--r--
choicfmt.h	23.99 KB	-rw-r--r--
coleitr.h	13.77 KB	-rw-r--r--
coll.h	56.28 KB	-rw-r--r--
compactdecimalformat.h	6.88 KB	-rw-r--r--
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currpinf.h	7.3 KB	-rw-r--r--
currunit.h	4.02 KB	-rw-r--r--
datefmt.h	40.7 KB	-rw-r--r--
dbbi.h	1.19 KB	-rw-r--r--
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decimfmt.h	87.46 KB	-rw-r--r--
displayoptions.h	7.08 KB	-rw-r--r--
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format.h	12.5 KB	-rw-r--r--
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gender.h	3.35 KB	-rw-r--r--
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listformatter.h	8.59 KB	-rw-r--r--
localebuilder.h	11.08 KB	-rw-r--r--
localematcher.h	26.86 KB	-rw-r--r--
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measfmt.h	11.41 KB	-rw-r--r--
measunit.h	108.23 KB	-rw-r--r--
measure.h	4.68 KB	-rw-r--r--
messageformat2.h	18.13 KB	-rw-r--r--
messageformat2_arguments.h	4.3 KB	-rw-r--r--
messageformat2_data_model.h	123 KB	-rw-r--r--
messageformat2_data_model_name...	784 B	-rw-r--r--
messageformat2_formattable.h	38.29 KB	-rw-r--r--
messageformat2_function_regist...	18 KB	-rw-r--r--
messagepattern.h	33.72 KB	-rw-r--r--
msgfmt.h	44.2 KB	-rw-r--r--
normalizer2.h	34.73 KB	-rw-r--r--
normlzr.h	30.79 KB	-rw-r--r--
nounit.h	2.24 KB	-rw-r--r--
numberformatter.h	90.74 KB	-rw-r--r--
numberrangeformatter.h	26.05 KB	-rw-r--r--
numfmt.h	50.16 KB	-rw-r--r--
numsys.h	7.22 KB	-rw-r--r--
parseerr.h	3.08 KB	-rw-r--r--
parsepos.h	5.56 KB	-rw-r--r--
platform.h	26.66 KB	-rw-r--r--
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schriter.h	6.09 KB	-rw-r--r--
scientificnumberformatter.h	6.44 KB	-rw-r--r--
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selfmt.h	14.35 KB	-rw-r--r--
simpleformatter.h	12.58 KB	-rw-r--r--
simplenumberformatter.h	9.18 KB	-rw-r--r--
simpletz.h	45.62 KB	-rw-r--r--
smpdtfmt.h	57.06 KB	-rw-r--r--
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std_string.h	1.05 KB	-rw-r--r--
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stringoptions.h	5.79 KB	-rw-r--r--
stringpiece.h	10.02 KB	-rw-r--r--
stringtriebuilder.h	15.5 KB	-rw-r--r--
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tblcoll.h	36.93 KB	-rw-r--r--
timezone.h	45.64 KB	-rw-r--r--
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tzfmt.h	42.95 KB	-rw-r--r--
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ucat.h	5.35 KB	-rw-r--r--
uchar.h	150.13 KB	-rw-r--r--
ucharstrie.h	22.56 KB	-rw-r--r--
ucharstriebuilder.h	7.48 KB	-rw-r--r--
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ucol.h	62.7 KB	-rw-r--r--
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uconfig.h	12.56 KB	-rw-r--r--
ucpmap.h	5.54 KB	-rw-r--r--
ucptrie.h	22.51 KB	-rw-r--r--
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ucurr.h	16.72 KB	-rw-r--r--
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udata.h	15.63 KB	-rw-r--r--
udateintervalformat.h	11.93 KB	-rw-r--r--
udatpg.h	30.13 KB	-rw-r--r--
udisplaycontext.h	5.94 KB	-rw-r--r--
udisplayoptions.h	8.86 KB	-rw-r--r--
uenum.h	7.79 KB	-rw-r--r--
ufieldpositer.h	4.41 KB	-rw-r--r--
uformattable.h	10.97 KB	-rw-r--r--
uformattednumber.h	8.09 KB	-rw-r--r--
uformattedvalue.h	12.25 KB	-rw-r--r--
ugender.h	2.06 KB	-rw-r--r--
uidna.h	33.43 KB	-rw-r--r--
uiter.h	22.75 KB	-rw-r--r--
uldnames.h	10.48 KB	-rw-r--r--
ulistformatter.h	10.78 KB	-rw-r--r--
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unum.h	55.16 KB	-rw-r--r--
unumberformatter.h	19.68 KB	-rw-r--r--
unumberoptions.h	5.23 KB	-rw-r--r--
unumberrangeformatter.h	15.35 KB	-rw-r--r--
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upluralrules.h	8.79 KB	-rw-r--r--
uregex.h	71.99 KB	-rw-r--r--
uregion.h	9.81 KB	-rw-r--r--
ureldatefmt.h	16.98 KB	-rw-r--r--
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urep.h	5.38 KB	-rw-r--r--
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Code Editor : 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_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/unistr.h"

#ifndef U_HIDE_DEPRECATED_API

U_NAMESPACE_BEGIN

namespace message2 {

class Environment;
    class MessageContext;
    class ResolvedSelector;
    class StaticErrors;

/**
     * <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;

/**
         * 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;

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);
            /**
             * 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 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;

ResolvedSelector resolveVariables(const Environment& env, const data_model::Operand&, MessageContext&, UErrorCode &) const;
        ResolvedSelector resolveVariables(const Environment& env, const data_model::Expression&, MessageContext&, UErrorCode &) const;

// 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&, ResolvedSelector&& 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
        [[nodiscard]] FormattedPlaceholder formatLiteral(const data_model::Literal&) const;
        void formatPattern(MessageContext&, const Environment&, const data_model::Pattern&, UErrorCode&, UnicodeString&) const;
        // Formats a call to a formatting function
        // Dispatches on argument type
        [[nodiscard]] FormattedPlaceholder evalFormatterCall(FormattedPlaceholder&& argument,
                                                       MessageContext& context,
                                                       UErrorCode& status) const;
        // Dispatches on function name
        [[nodiscard]] FormattedPlaceholder evalFormatterCall(const FunctionName& functionName,
                                                       FormattedPlaceholder&& argument,
                                                       FunctionOptions&& options,
                                                       MessageContext& context,
                                                       UErrorCode& status) const;
        // Formats an expression that appears as a selector
        ResolvedSelector formatSelectorExpression(const Environment& env, const data_model::Expression&, MessageContext&, UErrorCode&) const;
        // Formats an expression that appears in a pattern or as the definition of a local variable
        [[nodiscard]] FormattedPlaceholder formatExpression(const Environment&, const data_model::Expression&, MessageContext&, UErrorCode&) const;
        [[nodiscard]] FunctionOptions resolveOptions(const Environment& env, const OptionMap&, MessageContext&, UErrorCode&) const;
        [[nodiscard]] FormattedPlaceholder 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;

}; // class MessageFormatter

} // namespace message2

U_NAMESPACE_END

#endif // U_HIDE_DEPRECATED_API

#endif /* #if !UCONFIG_NO_MF2 */

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // MESSAGEFORMAT2_H

// eof

${this.title}

Code Editor : messageformat2.h