C++ API: MessagePattern class: Parses and represents ICU MessageFormat patterns. More...

#include "unicode/utypes.h"
#include "unicode/parseerr.h"
#include "unicode/unistr.h"

Data Structures
class	icu::MessagePattern
	Parses and represents ICU MessageFormat patterns. More...

class	icu::MessagePattern::Part
	A message pattern "part", representing a pattern parsing event. More...

Namespaces
	icu
	File coll.h.

Macros
#define	UMSGPAT_ARG_TYPE_HAS_PLURAL_STYLE(argType) ((argType)==UMSGPAT_ARG_TYPE_PLURAL \|\| (argType)==UMSGPAT_ARG_TYPE_SELECTORDINAL)
	Returns TRUE if the argument type has a plural style part sequence and semantics, for example UMSGPAT_ARG_TYPE_PLURAL and UMSGPAT_ARG_TYPE_SELECTORDINAL. More...

#define	UMSGPAT_NO_NUMERIC_VALUE ((double)(-123456789))
	Special value that is returned by getNumericValue(Part) when no numeric value is defined for a part. More...

Typedefs
typedef enum UMessagePatternApostropheMode	UMessagePatternApostropheMode

typedef enum UMessagePatternPartType	UMessagePatternPartType

typedef enum UMessagePatternArgType	UMessagePatternArgType

Enumerations
enum	UMessagePatternApostropheMode { UMSGPAT_APOS_DOUBLE_OPTIONAL, UMSGPAT_APOS_DOUBLE_REQUIRED }
	Mode for when an apostrophe starts quoted literal text for MessageFormat output. More...

enum	UMessagePatternPartType { UMSGPAT_PART_TYPE_MSG_START, UMSGPAT_PART_TYPE_MSG_LIMIT, UMSGPAT_PART_TYPE_SKIP_SYNTAX, UMSGPAT_PART_TYPE_INSERT_CHAR, UMSGPAT_PART_TYPE_REPLACE_NUMBER, UMSGPAT_PART_TYPE_ARG_START, UMSGPAT_PART_TYPE_ARG_LIMIT, UMSGPAT_PART_TYPE_ARG_NUMBER, UMSGPAT_PART_TYPE_ARG_NAME, UMSGPAT_PART_TYPE_ARG_TYPE, UMSGPAT_PART_TYPE_ARG_STYLE, UMSGPAT_PART_TYPE_ARG_SELECTOR, UMSGPAT_PART_TYPE_ARG_INT, UMSGPAT_PART_TYPE_ARG_DOUBLE }
	MessagePattern::Part type constants. More...

enum	UMessagePatternArgType { UMSGPAT_ARG_TYPE_NONE, UMSGPAT_ARG_TYPE_SIMPLE, UMSGPAT_ARG_TYPE_CHOICE, UMSGPAT_ARG_TYPE_PLURAL, UMSGPAT_ARG_TYPE_SELECT, UMSGPAT_ARG_TYPE_SELECTORDINAL }
	Argument type constants. More...

enum	{ UMSGPAT_ARG_NAME_NOT_NUMBER =-1, UMSGPAT_ARG_NAME_NOT_VALID =-2 }

Detailed Description

C++ API: MessagePattern class: Parses and represents ICU MessageFormat patterns.

Definition in file messagepattern.h.

Macro Definition Documentation

◆ UMSGPAT_ARG_TYPE_HAS_PLURAL_STYLE

#define UMSGPAT_ARG_TYPE_HAS_PLURAL_STYLE ( argType ) ((argType)==UMSGPAT_ARG_TYPE_PLURAL || (argType)==UMSGPAT_ARG_TYPE_SELECTORDINAL)

Returns TRUE if the argument type has a plural style part sequence and semantics, for example UMSGPAT_ARG_TYPE_PLURAL and UMSGPAT_ARG_TYPE_SELECTORDINAL.

Stable:: ICU 50

Definition at line 272 of file messagepattern.h.

◆ UMSGPAT_NO_NUMERIC_VALUE

#define UMSGPAT_NO_NUMERIC_VALUE ((double)(-123456789))

Special value that is returned by getNumericValue(Part) when no numeric value is defined for a part.

See also: MessagePattern.getNumericValue()

Stable:: ICU 4.8

Definition at line 299 of file messagepattern.h.

Typedef Documentation

◆ UMessagePatternApostropheMode

typedef enum UMessagePatternApostropheMode UMessagePatternApostropheMode

Stable:: ICU 4.8

Definition at line 96 of file messagepattern.h.

◆ UMessagePatternArgType

typedef enum UMessagePatternArgType UMessagePatternArgType

Stable:: ICU 4.8

Definition at line 264 of file messagepattern.h.

◆ UMessagePatternPartType

typedef enum UMessagePatternPartType UMessagePatternPartType

Stable:: ICU 4.8

Definition at line 211 of file messagepattern.h.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator

UMSGPAT_ARG_NAME_NOT_NUMBER

Return value from MessagePattern.validateArgumentName() for when the string is a valid "pattern identifier" but not a number.

Stable:: ICU 4.8

UMSGPAT_ARG_NAME_NOT_VALID

Return value from MessagePattern.validateArgumentName() for when the string is invalid.

It might not be a valid "pattern identifier", or it have only ASCII digits but there is a leading zero or the number is too large.

Stable:: ICU 4.8

Definition at line 275 of file messagepattern.h.

◆ UMessagePatternApostropheMode

enum UMessagePatternApostropheMode

Mode for when an apostrophe starts quoted literal text for MessageFormat output.

The default is DOUBLE_OPTIONAL unless overridden via uconfig.h (UCONFIG_MSGPAT_DEFAULT_APOSTROPHE_MODE).

A pair of adjacent apostrophes always results in a single apostrophe in the output, even when the pair is between two single, text-quoting apostrophes.

The following table shows examples of desired MessageFormat.format() output with the pattern strings that yield that output.

Desired output	DOUBLE_OPTIONAL	DOUBLE_REQUIRED
I see {many}	I see '{many}'	(same)
I said {'Wow!'}	I said '{''Wow!''}'	(same)
I don't know	I don't know OR I don''t know	I don''t know

Stable:: ICU 4.8

See also: UCONFIG_MSGPAT_DEFAULT_APOSTROPHE_MODE

Enumerator

UMSGPAT_APOS_DOUBLE_OPTIONAL

A literal apostrophe is represented by either a single or a double apostrophe pattern character.

Within a MessageFormat pattern, a single apostrophe only starts quoted literal text if it immediately precedes a curly brace {}, or a pipe symbol | if inside a choice format, or a pound symbol # if inside a plural format.

This is the default behavior starting with ICU 4.8.

Stable:: ICU 4.8

UMSGPAT_APOS_DOUBLE_REQUIRED

A literal apostrophe must be represented by a double apostrophe pattern character.

A single apostrophe always starts quoted literal text.

This is the behavior of ICU 4.6 and earlier, and of the JDK.

Stable:: ICU 4.8

Definition at line 70 of file messagepattern.h.

◆ UMessagePatternArgType

enum UMessagePatternArgType

Argument type constants.

Returned by Part.getArgType() for ARG_START and ARG_LIMIT parts.

Messages nested inside an argument are each delimited by MSG_START and MSG_LIMIT, with a nesting level one greater than the surrounding message.

Stable:: ICU 4.8

Enumerator
UMSGPAT_ARG_TYPE_NONE	The argument has no specified type. Stable: ICU 4.8
UMSGPAT_ARG_TYPE_SIMPLE	The argument has a "simple" type which is provided by the ARG_TYPE part. An ARG_STYLE part might follow that. Stable: ICU 4.8
UMSGPAT_ARG_TYPE_CHOICE	The argument is a ChoiceFormat with one or more ((ARG_INT \| ARG_DOUBLE), ARG_SELECTOR, message) tuples. Stable: ICU 4.8
UMSGPAT_ARG_TYPE_PLURAL	The argument is a cardinal-number PluralFormat with an optional ARG_INT or ARG_DOUBLE offset (e.g., offset:1) and one or more (ARG_SELECTOR [explicit-value] message) tuples. If the selector has an explicit value (e.g., =2), then that value is provided by the ARG_INT or ARG_DOUBLE part preceding the message. Otherwise the message immediately follows the ARG_SELECTOR. Stable: ICU 4.8
UMSGPAT_ARG_TYPE_SELECT	The argument is a SelectFormat with one or more (ARG_SELECTOR, message) pairs. Stable: ICU 4.8
UMSGPAT_ARG_TYPE_SELECTORDINAL	The argument is an ordinal-number PluralFormat with the same style parts sequence and semantics as UMSGPAT_ARG_TYPE_PLURAL. Stable: ICU 50

Definition at line 221 of file messagepattern.h.

◆ UMessagePatternPartType

enum UMessagePatternPartType

MessagePattern::Part type constants.

Stable:: ICU 4.8

Enumerator
UMSGPAT_PART_TYPE_MSG_START	Start of a message pattern (main or nested). The length is 0 for the top-level message and for a choice argument sub-message, otherwise 1 for the '{'. The value indicates the nesting level, starting with 0 for the main message. There is always a later MSG_LIMIT part. Stable: ICU 4.8
UMSGPAT_PART_TYPE_MSG_LIMIT	End of a message pattern (main or nested). The length is 0 for the top-level message and the last sub-message of a choice argument, otherwise 1 for the '}' or (in a choice argument style) the '\|'. The value indicates the nesting level, starting with 0 for the main message. Stable: ICU 4.8
UMSGPAT_PART_TYPE_SKIP_SYNTAX	Indicates a substring of the pattern string which is to be skipped when formatting. For example, an apostrophe that begins or ends quoted text would be indicated with such a part. The value is undefined and currently always 0. Stable: ICU 4.8
UMSGPAT_PART_TYPE_INSERT_CHAR	Indicates that a syntax character needs to be inserted for auto-quoting. The length is 0. The value is the character code of the insertion character. (U+0027=APOSTROPHE) Stable: ICU 4.8
UMSGPAT_PART_TYPE_REPLACE_NUMBER	Indicates a syntactic (non-escaped) # symbol in a plural variant. When formatting, replace this part's substring with the (value-offset) for the plural argument value. The value is undefined and currently always 0. Stable: ICU 4.8
UMSGPAT_PART_TYPE_ARG_START	Start of an argument. The length is 1 for the '{'. The value is the ordinal value of the ArgType. Use getArgType(). This part is followed by either an ARG_NUMBER or ARG_NAME, followed by optional argument sub-parts (see UMessagePatternArgType constants) and finally an ARG_LIMIT part. Stable: ICU 4.8
UMSGPAT_PART_TYPE_ARG_LIMIT	End of an argument. The length is 1 for the '}'. The value is the ordinal value of the ArgType. Use getArgType(). Stable: ICU 4.8
UMSGPAT_PART_TYPE_ARG_NUMBER	The argument number, provided by the value. Stable: ICU 4.8
UMSGPAT_PART_TYPE_ARG_NAME	The argument name. The value is undefined and currently always 0. Stable: ICU 4.8
UMSGPAT_PART_TYPE_ARG_TYPE	The argument type. The value is undefined and currently always 0. Stable: ICU 4.8
UMSGPAT_PART_TYPE_ARG_STYLE	The argument style text. The value is undefined and currently always 0. Stable: ICU 4.8
UMSGPAT_PART_TYPE_ARG_SELECTOR	A selector substring in a "complex" argument style. The value is undefined and currently always 0. Stable: ICU 4.8
UMSGPAT_PART_TYPE_ARG_INT	An integer value, for example the offset or an explicit selector value in a PluralFormat style. The part value is the integer value. Stable: ICU 4.8
UMSGPAT_PART_TYPE_ARG_DOUBLE	A numeric value, for example the offset or an explicit selector value in a PluralFormat style. The part value is an index into an internal array of numeric values; use getNumericValue(). Stable: ICU 4.8

Definition at line 102 of file messagepattern.h.

Data Structures

Namespaces

Macros

Typedefs

Enumerations

Detailed Description

Macro Definition Documentation

◆ UMSGPAT_ARG_TYPE_HAS_PLURAL_STYLE

◆ UMSGPAT_NO_NUMERIC_VALUE

Typedef Documentation

◆ UMessagePatternApostropheMode

◆ UMessagePatternArgType

◆ UMessagePatternPartType

Enumeration Type Documentation

◆ anonymous enum

◆ UMessagePatternApostropheMode

◆ UMessagePatternArgType

◆ UMessagePatternPartType