CONTENTS

• NAME
• SYNOPSIS
• DESCRIPTION
  • Constructor
  • Methods
  • A list of tailorable locales
• INSTALL
• CAVEAT
• AUTHOR
• SEE ALSO

#NAME

Unicode::Collate::Locale - Linguistic tailoring for DUCET via Unicode::Collate

#SYNOPSIS

use Unicode::Collate::Locale;

#construct
$Collator = Unicode::Collate::Locale->
    new(locale => $locale_name, %tailoring);

#sort
@sorted = $Collator->sort(@not_sorted);

#compare
$result = $Collator->cmp($a, $b); # returns 1, 0, or -1.

Note: Strings in @not_sorted, $a and $b are interpreted according to Perl's Unicode support. See perlunicode, perluniintro, perlunitut, perlunifaq, utf8. Otherwise you can use preprocess (cf. Unicode::Collate) or should decode them before.

#DESCRIPTION

This module provides linguistic tailoring for it taking advantage of Unicode::Collate.

#Constructor

The new method returns a collator object.

A parameter list for the constructor is a hash, which can include a special key locale and its value (case-insensitive) standing for a Unicode base language code (two or three-letter). For example, Unicode::Collate::Locale->new(locale => 'FR') returns a collator tailored for French.

$locale_name may be suffixed with a Unicode script code (four-letter), a Unicode region code, a Unicode language variant code. These codes are case-insensitive, and separated with '_' or '-'. E.g. en_US for English in USA, az_Cyrl for Azerbaijani in the Cyrillic script, es_ES_traditional for Spanish in Spain (Traditional).

If $locale_name is not available, fallback is selected in the following order:

1. language with a variant code
2. language with a script code
3. language with a region code
4. language
5. default

Tailoring tags provided by Unicode::Collate are allowed as long as they are not used for locale support. Esp. the table tag is always untailorable, since it is reserved for DUCET.

However entry is allowed, even if it is used for locale support, to add or override mappings.

E.g. a collator for French, which ignores diacritics and case difference (i.e. level 1), with reversed case ordering and no normalization.

Unicode::Collate::Locale->new(
    level => 1,
    locale => 'fr',
    upper_before_lower => 1,
    normalization => undef
)

Overriding a behavior already tailored by locale is disallowed if such a tailoring is passed to new().

Unicode::Collate::Locale->new(
    locale => 'da',
    upper_before_lower => 0, # causes error as reserved by 'da'
)

However change() inherited from Unicode::Collate allows such a tailoring that is reserved by locale. Examples:

new(locale => 'ca')->change(backwards => undef)
new(locale => 'da')->change(upper_before_lower => 0)
new(locale => 'ja')->change(overrideCJK => undef)