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EDIT :: messageformat2_formattable.h

// © 2024 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html #include "unicode/utypes.h" #ifndef MESSAGEFORMAT2_FORMATTABLE_H #define MESSAGEFORMAT2_FORMATTABLE_H #if U_SHOW_CPLUSPLUS_API #if !UCONFIG_NO_NORMALIZATION #if !UCONFIG_NO_FORMATTING #if !UCONFIG_NO_MF2 #include "unicode/chariter.h" #include "unicode/numberformatter.h" #include "unicode/messageformat2_data_model_names.h" #ifndef U_HIDE_DEPRECATED_API #include <map> #include <variant> U_NAMESPACE_BEGIN class Hashtable; class UVector; namespace message2 { class Formatter; class MessageContext; class Selector; // Formattable // ---------- /** * `FormattableObject` is an abstract class that can be implemented in order to define * an arbitrary class that can be passed to a custom formatter or selector function. * To be passed in such a way, it must be wrapped in a `Formattable` object. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ class U_I18N_API FormattableObject : public UObject { public: /** * Returns an arbitrary string representing the type of this object. * It's up to the implementor of this class, as well as the implementors * of any custom functions that rely on particular values of this tag * corresponding to particular classes that the object contents can be * downcast to, to ensure that the type tags are used soundly. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ virtual const UnicodeString& tag() const = 0; /** * Destructor. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ virtual ~FormattableObject(); }; // class FormattableObject class Formattable; } // namespace message2 U_NAMESPACE_END /// @cond DOXYGEN_IGNORE // Export an explicit template instantiation of the std::variant that is used // to represent the message2::Formattable class. // (When building DLLs for Windows this is required.) // (See measunit_impl.h, datefmt.h, collationiterator.h, erarules.h and others // for similar examples.) #if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN #if defined(U_REAL_MSVC) && defined(_MSVC_STL_VERSION) template class U_I18N_API std::_Variant_storage_<false, double, int64_t, icu::UnicodeString, icu::Formattable, const icu::message2::FormattableObject *, std::pair<const icu::message2::Formattable *,int32_t>>; #endif typedef std::pair<const icu::message2::Formattable*, int32_t> P; template class U_I18N_API std::variant<double, int64_t, icu::UnicodeString, icu::Formattable, const icu::message2::FormattableObject*, P>; #endif /// @endcond U_NAMESPACE_BEGIN namespace message2 { /** * The `Formattable` class represents a typed value that can be formatted, * originating either from a message argument or a literal in the code. * ICU's Formattable class is not used in MessageFormat 2 because it's unsafe to copy an * icu::Formattable value that contains an object. (See ICU-20275). * * `Formattable` is immutable (not deeply immutable) and * is movable and copyable. * (Copying does not do a deep copy when the wrapped value is an array or * object. Likewise, while a pointer to a wrapped array or object is `const`, * the referents of the pointers may be mutated by other code.) * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ class U_I18N_API Formattable : public UObject { public: /** * Gets the data type of this Formattable object. * @return the data type of this Formattable object. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ UFormattableType getType() const; /** * Gets the double value of this object. If this object is not of type * UFMT_DOUBLE, then the result is undefined and the error code is set. * * @param status Input/output error code. * @return the double value of this object. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ double getDouble(UErrorCode& status) const { if (U_SUCCESS(status)) { if (isDecimal() && getType() == UFMT_DOUBLE) { return (std::get_if<icu::Formattable>(&contents))->getDouble(); } if (std::holds_alternative<double>(contents)) { return *(std::get_if<double>(&contents)); } status = U_ILLEGAL_ARGUMENT_ERROR; } return 0; } /** * Gets the long value of this object. If this object is not of type * UFMT_LONG then the result is undefined and the error code is set. * * @param status Input/output error code. * @return the long value of this object. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ int32_t getLong(UErrorCode& status) const { if (U_SUCCESS(status)) { if (isDecimal() && getType() == UFMT_LONG) { return std::get_if<icu::Formattable>(&contents)->getLong(); } if (std::holds_alternative<int64_t>(contents)) { return static_cast<int32_t>(*(std::get_if<int64_t>(&contents))); } status = U_ILLEGAL_ARGUMENT_ERROR; } return 0; } /** * Gets the int64 value of this object. If this object is not of type * kInt64 then the result is undefined and the error code is set. * If conversion to int64 is desired, call getInt64() * * @param status Input/output error code. * @return the int64 value of this object. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ int64_t getInt64Value(UErrorCode& status) const { if (U_SUCCESS(status)) { if (isDecimal() && getType() == UFMT_INT64) { return std::get_if<icu::Formattable>(&contents)->getInt64(); } if (std::holds_alternative<int64_t>(contents)) { return *(std::get_if<int64_t>(&contents)); } status = U_ILLEGAL_ARGUMENT_ERROR; } return 0; } /** * Gets the int64 value of this object. If this object is of a numeric * type and the magnitude is too large to fit in an int64, then * the maximum or minimum int64 value, as appropriate, is returned * and the status is set to U_INVALID_FORMAT_ERROR. If the * magnitude fits in an int64, then a casting conversion is * performed, with truncation of any fractional part. If this object is * not a numeric type, then 0 is returned and * the status is set to U_INVALID_FORMAT_ERROR. * @param status the error code * @return the int64 value of this object. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ int64_t getInt64(UErrorCode& status) const; /** * Gets the string value of this object. If this object is not of type * kString then the result is undefined and the error code is set. * * @param status Input/output error code. * @return A reference to the string value of this object. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ const UnicodeString& getString(UErrorCode& status) const { if (U_SUCCESS(status)) { if (std::holds_alternative<UnicodeString>(contents)) { return *std::get_if<UnicodeString>(&contents); } status = U_ILLEGAL_ARGUMENT_ERROR; } return bogusString; } /** * Gets the Date value of this object. If this object is not of type * kDate then the result is undefined and the error code is set. * * @param status Input/output error code. * @return the Date value of this object. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ UDate getDate(UErrorCode& status) const { if (U_SUCCESS(status)) { if (isDate()) { return *std::get_if<double>(&contents); } status = U_ILLEGAL_ARGUMENT_ERROR; } return 0; } /** * Returns true if the data type of this Formattable object * is kDouble * @return true if this is a pure numeric object * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ UBool isNumeric() const { return (getType() == UFMT_DOUBLE || getType() == UFMT_LONG || getType() == UFMT_INT64); } /** * Gets the array value and count of this object. If this object * is not of type kArray then the result is undefined and the error code is set. * * @param count fill-in with the count of this object. * @param status Input/output error code. * @return the array value of this object. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ const Formattable* getArray(int32_t& count, UErrorCode& status) const; /** * Returns a pointer to the FormattableObject contained within this * formattable, or if this object does not contain a FormattableObject, * returns nullptr and sets the error code. * * @param status Input/output error code. * @return a FormattableObject pointer, or nullptr * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ const FormattableObject* getObject(UErrorCode& status) const { if (U_SUCCESS(status)) { // Can't return a reference since FormattableObject // is an abstract class if (getType() == UFMT_OBJECT) { return *std::get_if<const FormattableObject*>(&contents); // TODO: should assert that if type is object, object is non-null } status = U_ILLEGAL_ARGUMENT_ERROR; } return nullptr; } /** * Non-member swap function. * @param f1 will get f2's contents * @param f2 will get f1's contents * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ friend inline void swap(Formattable& f1, Formattable& f2) noexcept { using std::swap; swap(f1.contents, f2.contents); swap(f1.holdsDate, f2.holdsDate); } /** * Copy constructor. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ Formattable(const Formattable&); /** * Assignment operator * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ Formattable& operator=(Formattable) noexcept; /** * Default constructor. Leaves the Formattable in a * valid but undefined state. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ Formattable() : contents(0.0) {} /** * String constructor. * * @param s A string to wrap as a Formattable. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ Formattable(const UnicodeString& s) : contents(s) {} /** * Double constructor. * * @param d A double value to wrap as a Formattable. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ Formattable(double d) : contents(d) {} /** * Int64 constructor. * * @param i An int64 value to wrap as a Formattable. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ Formattable(int64_t i) : contents(i) {} /** * Date factory method. * * @param d A UDate value to wrap as a Formattable. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ static Formattable forDate(UDate d) { Formattable f; f.contents = d; f.holdsDate = true; return f; } /** * Creates a Formattable object of an appropriate numeric type from a * a decimal number in string form. The Formattable will retain the * full precision of the input in decimal format, even when it exceeds * what can be represented by a double or int64_t. * * @param number the unformatted (not localized) string representation * of the Decimal number. * @param status the error code. Possible errors include U_INVALID_FORMAT_ERROR * if the format of the string does not conform to that of a * decimal number. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ static Formattable forDecimal(std::string_view number, UErrorCode& status); /** * Array constructor. * * @param arr An array of Formattables, which is adopted. * @param len The length of the array. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ Formattable(const Formattable* arr, int32_t len) : contents(std::pair(arr, len)) {} /** * Object constructor. * * @param obj A FormattableObject (not adopted). * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ Formattable(const FormattableObject* obj) : contents(obj) {} /** * Destructor. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ virtual ~Formattable(); /** * Converts the Formattable object to an ICU Formattable object. * If this has type UFMT_OBJECT or kArray, then `status` is set to * U_ILLEGAL_ARGUMENT_ERROR. * * @param status Input/output error code. * @return An icu::Formattable value with the same value as this. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ icu::Formattable asICUFormattable(UErrorCode& status) const; private: std::variant<double, int64_t, UnicodeString, icu::Formattable, // represents a Decimal const FormattableObject*, std::pair<const Formattable*, int32_t>> contents; bool holdsDate = false; // otherwise, we get type errors about UDate being a duplicate type UnicodeString bogusString; // :(((( UBool isDecimal() const { return std::holds_alternative<icu::Formattable>(contents); } UBool isDate() const { return std::holds_alternative<double>(contents) && holdsDate; } }; // class Formattable /** * Internal use only, but has to be included here as part of the implementation * of the header-only `FunctionOptions::getOptions()` method * * A `ResolvedFunctionOption` represents the result of evaluating * a single named function option. It pairs the given name with the `Formattable` * value resulting from evaluating the option's value. * * `ResolvedFunctionOption` is immutable and is not copyable or movable. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ #ifndef U_IN_DOXYGEN class U_I18N_API ResolvedFunctionOption : public UObject { private: /* const */ UnicodeString name; /* const */ Formattable value; public: const UnicodeString& getName() const { return name; } const Formattable& getValue() const { return value; } ResolvedFunctionOption(const UnicodeString& n, const Formattable& f) : name(n), value(f) {} ResolvedFunctionOption() {} ResolvedFunctionOption(ResolvedFunctionOption&&); ResolvedFunctionOption& operator=(ResolvedFunctionOption&& other) noexcept { name = std::move(other.name); value = std::move(other.value); return *this; } virtual ~ResolvedFunctionOption(); }; // class ResolvedFunctionOption #endif /** * Mapping from option names to `message2::Formattable` objects, obtained * by calling `getOptions()` on a `FunctionOptions` object. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ using FunctionOptionsMap = std::map<UnicodeString, message2::Formattable>; /** * Structure encapsulating named options passed to a custom selector or formatter. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ class U_I18N_API FunctionOptions : public UObject { public: /** * Returns a map of all name-value pairs provided as options to this function. * The syntactic order of options is not guaranteed to * be preserved. * * This class is immutable and movable but not copyable. * * @return A map from strings to `message2::Formattable` objects representing * the results of resolving each option value. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FunctionOptionsMap getOptions() const { int32_t len; const ResolvedFunctionOption* resolvedOptions = getResolvedFunctionOptions(len); FunctionOptionsMap result; for (int32_t i = 0; i < len; i++) { const ResolvedFunctionOption& opt = resolvedOptions[i]; result[opt.getName()] = opt.getValue(); } return result; } /** * Default constructor. * Returns an empty mapping. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FunctionOptions() { options = nullptr; } /** * Destructor. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ virtual ~FunctionOptions(); /** * Move assignment operator: * The source FunctionOptions will be left in a valid but undefined state. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FunctionOptions& operator=(FunctionOptions&&) noexcept; /** * Move constructor: * The source FunctionOptions will be left in a valid but undefined state. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FunctionOptions(FunctionOptions&&); /** * Copy constructor. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FunctionOptions& operator=(const FunctionOptions&) = delete; private: friend class InternalValue; friend class MessageFormatter; friend class StandardFunctions; explicit FunctionOptions(UVector&&, UErrorCode&); const ResolvedFunctionOption* getResolvedFunctionOptions(int32_t& len) const; UBool getFunctionOption(const UnicodeString&, Formattable&) const; // Returns empty string if option doesn't exist UnicodeString getStringFunctionOption(const UnicodeString&) const; int32_t optionsCount() const { return functionOptionsLen; } // Named options passed to functions // This is not a Hashtable in order to make it possible for code in a public header file // to construct a std::map from it, on-the-fly. Otherwise, it would be impossible to put // that code in the header because it would have to call internal Hashtable methods. ResolvedFunctionOption* options; int32_t functionOptionsLen = 0; // Returns a new FunctionOptions FunctionOptions mergeOptions(FunctionOptions&& other, UErrorCode&); }; // class FunctionOptions /** * A `FormattedValue` represents the result of formatting a `message2::Formattable`. * It contains either a string or a formatted number. (More types could be added * in the future.) * * `FormattedValue` is immutable and movable. It is not copyable. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ class U_I18N_API FormattedValue : public UObject { public: /** * Formatted string constructor. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ explicit FormattedValue(const UnicodeString&); /** * Formatted number constructor. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ explicit FormattedValue(number::FormattedNumber&&); /** * Default constructor. Leaves the FormattedValue in * a valid but undefined state. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FormattedValue() : type(kString) {} /** * Returns true iff this is a formatted string. * * @return True if and only if this value is a formatted string. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ bool isString() const { return type == kString; } /** * Returns true iff this is a formatted number. * * @return True if and only if this value is a formatted number. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ bool isNumber() const { return type == kNumber; } /** * Gets the string contents of this value. If !isString(), then * the result is undefined. * @return A reference to a formatted string. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ const UnicodeString& getString() const { return stringOutput; } /** * Gets the number contents of this value. If !isNumber(), then * the result is undefined. * @return A reference to a formatted number. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ const number::FormattedNumber& getNumber() const { return numberOutput; } /** * Move assignment operator: * The source FormattedValue will be left in a valid but undefined state. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FormattedValue& operator=(FormattedValue&&) noexcept; /** * Move constructor: * The source FormattedValue will be left in a valid but undefined state. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FormattedValue(FormattedValue&& other) { *this = std::move(other); } /** * Destructor. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ virtual ~FormattedValue(); private: enum Type { kString, kNumber }; Type type; UnicodeString stringOutput; number::FormattedNumber numberOutput; }; // class FormattedValue /** * A `FormattablePlaceholder` encapsulates an input value (a `message2::Formattable`) * together with an optional output value (a `message2::FormattedValue`). * More information, such as source line/column numbers, could be added to the class * in the future. * * `FormattablePlaceholder` is immutable (not deeply immutable) and movable. * It is not copyable. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ class U_I18N_API FormattedPlaceholder : public UObject { public: /** * Fallback constructor. Constructs a value that represents a formatting error, * without recording an input `Formattable` as the source. * * @param s An error string. (See the MessageFormat specification for details * on fallback strings.) * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ explicit FormattedPlaceholder(const UnicodeString& s) : fallback(s), type(kFallback) {} /** * Constructor for fully formatted placeholders. * * @param input A `FormattedPlaceholder` containing the fallback string and source * `Formattable` used to construct the formatted value. * @param output A `FormattedValue` representing the formatted output of `input`. * Passed by move. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FormattedPlaceholder(const FormattedPlaceholder& input, FormattedValue&& output) : fallback(input.fallback), source(input.source), formatted(std::move(output)), previousOptions(FunctionOptions()), type(kEvaluated) {} /** * Constructor for fully formatted placeholders with options. * * @param input A `FormattedPlaceholder` containing the fallback string and source * `Formattable` used to construct the formatted value. * @param opts Function options that were used to construct `output`. May be the empty map. * @param output A `FormattedValue` representing the formatted output of `input`. * Passed by move. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FormattedPlaceholder(const FormattedPlaceholder& input, FunctionOptions&& opts, FormattedValue&& output) : fallback(input.fallback), source(input.source), formatted(std::move(output)), previousOptions(std::move(opts)), type(kEvaluated) {} /** * Constructor for unformatted placeholders. * * @param input A `Formattable` object. * @param fb Fallback string to use if an error occurs while formatting the input. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FormattedPlaceholder(const Formattable& input, const UnicodeString& fb) : fallback(fb), source(input), type(kUnevaluated) {} /** * Default constructor. Leaves the FormattedPlaceholder in a * valid but undefined state. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FormattedPlaceholder() : type(kNull) {} /** * Returns the source `Formattable` value for this placeholder. * The result is undefined if this is a null operand. * * @return A message2::Formattable value. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ const message2::Formattable& asFormattable() const; /** * Returns true iff this is a fallback placeholder. * * @return True if and only if this placeholder was constructed from a fallback string, * with no `Formattable` source or formatting output. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ bool isFallback() const { return type == kFallback; } /** * Returns true iff this is a null placeholder. * * @return True if and only if this placeholder represents the absent argument to a formatter * that was invoked without an argument. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ bool isNullOperand() const { return type == kNull; } /** * Returns true iff this has formatting output. * * @return True if and only if this was constructed from both an input `Formattable` and * output `FormattedValue`. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ bool isEvaluated() const { return (type == kEvaluated); } /** * Returns true iff this represents a valid argument to the formatter. * * @return True if and only if this is neither the null argument nor a fallback placeholder. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ bool canFormat() const { return !(isFallback() || isNullOperand()); } /** * Gets the fallback value of this placeholder, to be used in its place if an error occurs while * formatting it. * @return A reference to this placeholder's fallback string. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ const UnicodeString& getFallback() const { return fallback; } /** * Returns the options of this placeholder. The result is the empty map if !isEvaluated(). * @return A reference to an option map, capturing the options that were used * in producing the output of this `FormattedPlaceholder` * (or empty if there is no output) * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ const FunctionOptions& options() const { return previousOptions; } /** * Returns the formatted output of this placeholder. The result is undefined if !isEvaluated(). * @return A fully formatted `FormattedPlaceholder`. * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ const FormattedValue& output() const { return formatted; } /** * Move assignment operator: * The source FormattedPlaceholder will be left in a valid but undefined state. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FormattedPlaceholder& operator=(FormattedPlaceholder&&) noexcept; /** * Move constructor: * The source FormattedPlaceholder will be left in a valid but undefined state. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ FormattedPlaceholder(FormattedPlaceholder&& other) { *this = std::move(other); } /** * Formats this as a string, using defaults. If this is * either the null operand or is a fallback value, the return value is the result of formatting the * fallback value (which is the default fallback string if this is the null operand). * If there is no formatted output and the input is object- or array-typed, * then the argument is treated as a fallback value, since there is no default formatter * for objects or arrays. * * @param locale The locale to use for formatting numbers or dates * @param status Input/output error code * @return The result of formatting this placeholder. * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ UnicodeString formatToString(const Locale& locale, UErrorCode& status) const; private: friend class MessageFormatter; enum Type { kFallback, // Represents the result of formatting that encountered an error kNull, // Represents the absence of both an output and an input (not necessarily an error) kUnevaluated, // `source` should be valid, but there's no result yet kEvaluated, // `formatted` exists }; UnicodeString fallback; Formattable source; FormattedValue formatted; FunctionOptions previousOptions; // Ignored unless type is kEvaluated Type type; }; // class FormattedPlaceholder /** * Not yet implemented: The result of a message formatting operation. Based on * ICU4J's FormattedMessage.java. * * The class will contain information allowing the result to be viewed as a string, * iterator, etc. (TBD) * * @internal ICU 75 technology preview * @deprecated This API is for technology preview only. */ class U_I18N_API FormattedMessage : public icu::FormattedValue { public: /** * Not yet implemented. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ FormattedMessage(UErrorCode& status) { if (U_SUCCESS(status)) { status = U_UNSUPPORTED_ERROR; } } /** * Not yet implemented. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ int32_t length(UErrorCode& status) const { if (U_SUCCESS(status)) { status = U_UNSUPPORTED_ERROR; } return -1; } /** * Not yet implemented. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ char16_t charAt(int32_t index, UErrorCode& status) const { (void) index; if (U_SUCCESS(status)) { status = U_UNSUPPORTED_ERROR; } return 0; } /** * Not yet implemented. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ StringPiece subSequence(int32_t start, int32_t end, UErrorCode& status) const { (void) start; (void) end; if (U_SUCCESS(status)) { status = U_UNSUPPORTED_ERROR; } return ""; } /** * Not yet implemented. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ UnicodeString toString(UErrorCode& status) const override { if (U_SUCCESS(status)) { status = U_UNSUPPORTED_ERROR; } return {}; } /** * Not yet implemented. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ UnicodeString toTempString(UErrorCode& status) const override { if (U_SUCCESS(status)) { status = U_UNSUPPORTED_ERROR; } return {}; } /** * Not yet implemented. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ Appendable& appendTo(Appendable& appendable, UErrorCode& status) const override { if (U_SUCCESS(status)) { status = U_UNSUPPORTED_ERROR; } return appendable; } /** * Not yet implemented. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const override { (void) cfpos; if (U_SUCCESS(status)) { status = U_UNSUPPORTED_ERROR; } return false; } /** * Not yet implemented. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ CharacterIterator* toCharacterIterator(UErrorCode& status) { if (U_SUCCESS(status)) { status = U_UNSUPPORTED_ERROR; } return nullptr; } /** * Destructor. * * @internal ICU 75 technology preview * @deprecated This API is for ICU internal use only. */ virtual ~FormattedMessage(); }; // class FormattedMessage } // 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_FORMATTABLE_H // eof

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