The Key class corresponds to the key nonterminal in the MessageFormat 2 grammar, https://github.com/unicode-org/message-format-wg/blob/main/spec/message.abnf . More...

#include <messageformat2_data_model.h>

Inheritance diagram for icu::message2::data_model::Key:

Public Member Functions
U_I18N_API UBool	isWildcard () const
	Determines if this is a wildcard key. More...

U_I18N_API const Literal &	asLiteral () const
	Returns the contents of this key as a literal. More...

U_I18N_API	Key (const Key &other)
	Copy constructor. More...

U_I18N_API	Key ()
	Wildcard constructor; constructs a Key representing the catchall or wildcard key, '*'. More...

U_I18N_API	Key (const Literal &lit)
	Literal key constructor. More...

U_I18N_API Key &	operator= (Key) noexcept
	Assignment operator. More...

U_I18N_API bool	operator< (const Key &other) const
	Less than operator. More...

U_I18N_API bool	operator== (const Key &other) const
	Equality operator. More...

virtual U_I18N_API	~Key ()
	Destructor. More...

Public Member Functions inherited from icu::UObject
virtual	~UObject ()
	Destructor. More...

virtual UClassID	getDynamicClassID () const
	ICU4C "poor man's RTTI", returns a UClassID for the actual ICU class. More...

Friends
U_I18N_API friend void	swap (Key &k1, Key &k2) noexcept
	Non-member swap function. More...

Detailed Description

The Key class corresponds to the key nonterminal in the MessageFormat 2 grammar, https://github.com/unicode-org/message-format-wg/blob/main/spec/message.abnf .

It also corresponds to the Literal | CatchallKey that is the element type of the keys array in the Variant interface defined in https://github.com/unicode-org/message-format-wg/blob/main/spec/data-model.md#messages

A key is either a literal or the wildcard symbol (represented in messages as '*')

Key is immutable, copyable and movable.

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

Definition at line 346 of file messageformat2_data_model.h.

Constructor & Destructor Documentation

◆ Key() [1/3]

U_I18N_API icu::message2::data_model::Key::Key ( const Key & other )

inline

Copy constructor.

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

Definition at line 373 of file messageformat2_data_model.h.

◆ Key() [2/3]

U_I18N_API icu::message2::data_model::Key::Key ( )

inline

Wildcard constructor; constructs a Key representing the catchall or wildcard key, '*'.

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

Definition at line 381 of file messageformat2_data_model.h.

◆ Key() [3/3]

U_I18N_API icu::message2::data_model::Key::Key ( const Literal & lit )

inlineexplicit

Literal key constructor.

Parameters

lit	A Literal to use for this key. The result matches the literal `lit`.

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

Definition at line 391 of file messageformat2_data_model.h.

◆ ~Key()

virtual U_I18N_API icu::message2::data_model::Key::~Key ( )

virtual

Destructor.

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

Member Function Documentation

◆ asLiteral()

U_I18N_API const Literal& icu::message2::data_model::Key::asLiteral ( ) const

Returns the contents of this key as a literal.

Precondition: !isWildcard()

Returns: The literal contents of the key

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

◆ isWildcard()

U_I18N_API UBool icu::message2::data_model::Key::isWildcard ( ) const

inline

Determines if this is a wildcard key.

Returns: True if and only if this is the wildcard key

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

Definition at line 356 of file messageformat2_data_model.h.

◆ operator<()

U_I18N_API bool icu::message2::data_model::Key::operator< ( const Key & other ) const

Less than operator.

Compares the literal of this with the literal of other. This method is used in representing the mapping from key lists to patterns in a message with variants, and is not expected to be useful otherwise.

Parameters

other The Key to compare to this one.

Returns: true if the two Keys are not wildcards and if this.asLiteral() < other.asLiteral(). Returns false otherwise.

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

◆ operator=()

U_I18N_API Key& icu::message2::data_model::Key::operator= ( Key )

noexcept

Assignment operator.

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

◆ operator==()

U_I18N_API bool icu::message2::data_model::Key::operator== ( const Key & other ) const

Equality operator.

Compares the literal of this with the literal of other. This method is used in representing the mapping from key lists to patterns in a message with variants, and is not expected to be useful otherwise.

Parameters

other The Key to compare to this one.

Returns: true if either both Keys are wildcards, or this.asLiteral() == other.asLiteral(). Returns false otherwise.

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

Friends And Related Function Documentation

◆ swap

U_I18N_API friend void swap	(	Key &	k1,
		Key &	k2
	)

friend

Non-member swap function.

Parameters

k1	will get k2's contents
k2	will get k1's contents

Internal:: Do not use. This API is for internal use only. ICU 75 technology preview

Deprecated:: This API is for technology preview only.

Definition at line 400 of file messageformat2_data_model.h.

The documentation for this class was generated from the following file:

i18n/unicode/messageformat2_data_model.h

Public Member Functions

Friends

Detailed Description

Constructor & Destructor Documentation

◆ Key() [1/3]

◆ Key() [2/3]

◆ Key() [3/3]

◆ ~Key()

Member Function Documentation

◆ asLiteral()

◆ isWildcard()

◆ operator<()

◆ operator=()

◆ operator==()

Friends And Related Function Documentation

◆ swap