icu::LocaleMatcher::Builder Class Reference

#include <localematcher.h>

Inheritance diagram for icu::LocaleMatcher::Builder:

Public Member Functions
	Builder ()
	Constructs a builder used in chaining parameters for building a LocaleMatcher.
	Builder (Builder &&src) U_NOEXCEPT
	Move constructor; might modify the source.
	~Builder ()
	Destructor.
Builder &	operator= (Builder &&src) U_NOEXCEPT
	Move assignment; might modify the source.
Builder &	setSupportedLocalesFromListString (StringPiece locales)
	Parses an Accept-Language string (RFC 2616 Section 14.4), such as "af, en, fr;q=0.9", and sets the supported locales accordingly.
Builder &	setSupportedLocales (Locale::Iterator &locales)
	Copies the supported locales, preserving iteration order.
template<typename Iter >
Builder &	setSupportedLocales (Iter begin, Iter end)
	Copies the supported locales from the begin/end range, preserving iteration order.
template<typename Iter , typename Conv >
Builder &	setSupportedLocalesViaConverter (Iter begin, Iter end, Conv converter)
	Copies the supported locales from the begin/end range, preserving iteration order.
Builder &	addSupportedLocale (const Locale &locale)
	Adds another supported locale.
Builder &	setNoDefaultLocale ()
	Sets no default locale.
Builder &	setDefaultLocale (const Locale *defaultLocale)
	Sets the default locale; if nullptr, or if it is not set explicitly, then the first supported locale is used as the default locale.
Builder &	setFavorSubtag (ULocMatchFavorSubtag subtag)
	If ULOCMATCH_FAVOR_SCRIPT, then the language differences are smaller than script differences.
Builder &	setDemotionPerDesiredLocale (ULocMatchDemotion demotion)
	Option for whether all desired locales are treated equally or earlier ones are preferred (this is the default).
Builder &	setDirection (ULocMatchDirection matchDirection)
	Option for whether to include or ignore one-way (fallback) match data.
Builder &	setMaxDistance (const Locale &desired, const Locale &supported)
	Sets the maximum distance for an acceptable match.
UBool	copyErrorTo (UErrorCode &outErrorCode) const
	Sets the UErrorCode if an error occurred while setting parameters.
LocaleMatcher	build (UErrorCode &errorCode) const
	Builds and returns a new locale matcher.
Friends
class	LocaleMatcher

Detailed Description

LocaleMatcher builder.

Movable but not copyable.

Stable:: ICU 65

Definition at line 299 of file localematcher.h.

Constructor & Destructor Documentation

icu::LocaleMatcher::Builder::Builder ( ) [inline]

Constructs a builder used in chaining parameters for building a LocaleMatcher.

Returns:: a new Builder object

Stable:: ICU 65

Definition at line 307 of file localematcher.h.

icu::LocaleMatcher::Builder::Builder ( Builder && src )

Move constructor; might modify the source.

This builder will have the same contents that the source builder had.

Parameters:

src

Builder to move contents from.

Stable:: ICU 65

icu::LocaleMatcher::Builder::~Builder ( )

Destructor.

Stable:: ICU 65

Member Function Documentation

Builder& icu::LocaleMatcher::Builder::addSupportedLocale ( const Locale & locale )

Adds another supported locale.

Duplicates are allowed, and are not removed.

Parameters:

locale

another locale

Returns:: this Builder object

Stable:: ICU 65

LocaleMatcher icu::LocaleMatcher::Builder::build ( UErrorCode & errorCode ) const

Builds and returns a new locale matcher.

This builder can continue to be used.

Parameters:

errorCode

ICU error code. Its input value must pass the U_SUCCESS() test, or else the function returns immediately. Check for U_FAILURE() on output or use with function chaining. (See User Guide for details.)

Returns:: LocaleMatcher

Stable:: ICU 65

UBool icu::LocaleMatcher::Builder::copyErrorTo ( UErrorCode & outErrorCode ) const

Sets the UErrorCode if an error occurred while setting parameters.

Preserves older error codes in the outErrorCode.

Parameters:

outErrorCode

Set to an error code if it does not contain one already and an error occurred while setting parameters. Otherwise unchanged.

Returns:: true if U_FAILURE(outErrorCode)

Stable:: ICU 65

Builder& icu::LocaleMatcher::Builder::operator= ( Builder && src )

Move assignment; might modify the source.

This builder will have the same contents that the source builder had.

Parameters:

src

Builder to move contents from.

Stable:: ICU 65

Builder& icu::LocaleMatcher::Builder::setDefaultLocale ( const Locale * defaultLocale )

Sets the default locale; if nullptr, or if it is not set explicitly, then the first supported locale is used as the default locale.

There is no default locale at all (nullptr will be returned instead) if setNoDefaultLocale() is called.

Parameters:

defaultLocale

the default locale (will be copied)

Returns:: this Builder object

Stable:: ICU 65

Builder& icu::LocaleMatcher::Builder::setDemotionPerDesiredLocale ( ULocMatchDemotion demotion )

Option for whether all desired locales are treated equally or earlier ones are preferred (this is the default).

Parameters:

demotion

the demotion per desired locale to set.

Returns:: this Builder object

Stable:: ICU 65

Builder& icu::LocaleMatcher::Builder::setDirection ( ULocMatchDirection matchDirection ) [inline]

Option for whether to include or ignore one-way (fallback) match data.

By default, they are included.

Parameters:

matchDirection

the match direction to set.

Returns:: this Builder object

Stable:: ICU 67

Definition at line 468 of file localematcher.h.

References U_SUCCESS.

Builder& icu::LocaleMatcher::Builder::setFavorSubtag ( ULocMatchFavorSubtag subtag )

If ULOCMATCH_FAVOR_SCRIPT, then the language differences are smaller than script differences.

This is used in situations (such as maps) where it is better to fall back to the same script than a similar language.

Parameters:

subtag

the subtag to favor

Returns:: this Builder object

Stable:: ICU 65

Builder& icu::LocaleMatcher::Builder::setMaxDistance	(	const Locale &	desired,
		const Locale &	supported
	)

Sets the maximum distance for an acceptable match.

The matcher will return a match for a pair of locales only if they match at least as well as the pair given here.

For example, setMaxDistance(en-US, en-GB) limits matches to ones where the (desired, support) locales have a distance no greater than a region subtag difference. This is much stricter than the CLDR default.

The details of locale matching are subject to changes in CLDR data and in the algorithm. Specifying a maximum distance in relative terms via a sample pair of locales insulates from changes that affect all distance metrics similarly, but some changes will necessarily affect relative distances between different pairs of locales.

Parameters:

	desired	the desired locale for distance comparison.
	supported	the supported locale for distance comparison.

Returns:: this Builder object

Stable:: ICU 68

Builder& icu::LocaleMatcher::Builder::setNoDefaultLocale ( )

Sets no default locale.

There will be no explicit or implicit default locale. If there is no good match, then the matcher will return nullptr for the best supported locale.

Stable:: ICU 68

template<typename Iter >

Builder& icu::LocaleMatcher::Builder::setSupportedLocales	(	Iter	begin,
		Iter	end
	)			`[inline]`

Copies the supported locales from the begin/end range, preserving iteration order.

Clears any previously set/added supported locales first. Duplicates are allowed, and are not removed.

Each of the iterator parameter values must be an input iterator whose value is convertible to const Locale &.

Parameters:

	begin	Start of range.
	end	Exclusive end of range.

Returns:: this Builder object

Stable:: ICU 65

Definition at line 372 of file localematcher.h.

References U_FAILURE.

Builder& icu::LocaleMatcher::Builder::setSupportedLocales ( Locale::Iterator & locales )

Copies the supported locales, preserving iteration order.

Clears any previously set/added supported locales first. Duplicates are allowed, and are not removed.

Parameters:

locales

the list of locale

Returns:: this Builder object

Stable:: ICU 65

Builder& icu::LocaleMatcher::Builder::setSupportedLocalesFromListString ( StringPiece locales )

Parses an Accept-Language string (RFC 2616 Section 14.4), such as "af, en, fr;q=0.9", and sets the supported locales accordingly.

Allows whitespace in more places but does not allow "*". Clears any previously set/added supported locales first.

Parameters:

locales

the Accept-Language string of locales to set

Returns:: this Builder object

Stable:: ICU 65

template<typename Iter , typename Conv >

Builder& icu::LocaleMatcher::Builder::setSupportedLocalesViaConverter	(	Iter	begin,
		Iter	end,
		Conv	converter
	)			`[inline]`

Copies the supported locales from the begin/end range, preserving iteration order.

Calls the converter to convert each *begin to a Locale or const Locale &. Clears any previously set/added supported locales first. Duplicates are allowed, and are not removed.

Each of the iterator parameter values must be an input iterator whose value is convertible to const Locale &.

Parameters:

	begin	Start of range.
	end	Exclusive end of range.
	converter	Converter from *begin to const Locale & or compatible.

Returns:: this Builder object

Stable:: ICU 65

Definition at line 397 of file localematcher.h.

References U_FAILURE.

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

localematcher.h

icu::LocaleMatcher::Builder Class Reference

Public Member Functions

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation