Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

encode::alias5.16(3pm) [osx man page]

Encode::Alias(3pm)					 Perl Programmers Reference Guide					Encode::Alias(3pm)

Encode::Alias - alias definitions to encodings SYNOPSIS
use Encode; use Encode::Alias; define_alias( "newName" => ENCODING); define_alias( qr/.../ => ENCODING); define_alias( sub { return ENCODING if ...; } ); DESCRIPTION
Allows newName to be used as an alias for ENCODING. ENCODING may be either the name of an encoding or an encoding object (as described in Encode). Currently the first argument to define_alias() can be specified in the following ways: As a simple string. As a qr// compiled regular expression, e.g.: define_alias( qr/^iso8859-(d+)$/i => '"iso-8859-$1"' ); In this case, if ENCODING is not a reference, it is "eval"-ed in order to allow $1 etc. to be substituted. The example is one way to alias names as used in X11 fonts to the MIME names for the iso-8859-* family. Note the double quotes inside the single quotes. (or, you don't have to do this yourself because this example is predefined) If you are using a regex here, you have to use the quotes as shown or it won't work. Also note that regex handling is tricky even for the experienced. Use this feature with caution. As a code reference, e.g.: define_alias( sub {shift =~ /^iso8859-(d+)$/i ? "iso-8859-$1" : undef } ); The same effect as the example above in a different way. The coderef takes the alias name as an argument and returns a canonical name on success or undef if not. Note the second argument is ignored if provided. Use this with even more caution than the regex version. Changes in code reference aliasing As of Encode 1.87, the older form define_alias( sub { return /^iso8859-(d+)$/i ? "iso-8859-$1" : undef } ); no longer works. Encode up to 1.86 internally used "local $_" to implement ths older form. But consider the code below; use Encode; $_ = "eeeee" ; while (/(e)/g) { my $utf = decode('aliased-encoding-name', $1); print "position:",pos," "; } Prior to Encode 1.86 this fails because of "local $_". Alias overloading You can override predefined aliases by simply applying define_alias(). The new alias is always evaluated first, and when necessary, define_alias() flushes the internal cache to make the new definition available. # redirect SHIFT_JIS to MS/IBM Code Page 932, which is a # superset of SHIFT_JIS define_alias( qr/shift.*jis$/i => '"cp932"' ); define_alias( qr/sjis$/i => '"cp932"' ); If you want to zap all predefined aliases, you can use Encode::Alias->undef_aliases; to do so. And Encode::Alias->init_aliases; gets the factory settings back. Note that define_alias() will not be able to override the canonical name of encodings. Encodings are first looked up by canonical name before potential aliases are tried. SEE ALSO
Encode, Encode::Supported perl v5.16.2 2012-10-25 Encode::Alias(3pm)

Check Out this Related Man Page

Encode::Byte(3pm)					 Perl Programmers Reference Guide					 Encode::Byte(3pm)

Encode::Byte - Single Byte Encodings SYNOPSIS
use Encode qw/encode decode/; $greek = encode("iso-8859-7", $utf8); # loads Encode::Byte implicitly $utf8 = decode("iso-8859-7", $greek); # ditto ABSTRACT
This module implements various single byte encodings. For most cases it uses x80-xff (upper half) to map non-ASCII characters. Encodings supported are as follows. Canonical Alias Description -------------------------------------------------------------------- # ISO 8859 series (iso-8859-1 is in built-in) iso-8859-2 latin2 [ISO] iso-8859-3 latin3 [ISO] iso-8859-4 latin4 [ISO] iso-8859-5 [ISO] iso-8859-6 [ISO] iso-8859-7 [ISO] iso-8859-8 [ISO] iso-8859-9 latin5 [ISO] iso-8859-10 latin6 [ISO] iso-8859-11 (iso-8859-12 is nonexistent) iso-8859-13 latin7 [ISO] iso-8859-14 latin8 [ISO] iso-8859-15 latin9 [ISO] iso-8859-16 latin10 [ISO] # Cyrillic koi8-f koi8-r cp878 [RFC1489] koi8-u [RFC2319] # Vietnamese viscii # all cp* are also available as ibm-*, ms-*, and windows-* # also see L<> cp424 cp437 cp737 cp775 cp850 cp852 cp855 cp856 cp857 cp860 cp861 cp862 cp863 cp864 cp865 cp866 cp869 cp874 cp1006 cp1250 WinLatin2 cp1251 WinCyrillic cp1252 WinLatin1 cp1253 WinGreek cp1254 WinTurkish cp1255 WinHebrew cp1256 WinArabic cp1257 WinBaltic cp1258 WinVietnamese # Macintosh # Also see L<> MacArabic MacCentralEurRoman MacCroatian MacCyrillic MacFarsi MacGreek MacHebrew MacIcelandic MacRoman MacRomanian MacRumanian MacSami MacThai MacTurkish MacUkrainian # More vendor encodings AdobeStandardEncoding nextstep hp-roman8 DESCRIPTION
To find how to use this module in detail, see Encode. SEE ALSO
Encode perl v5.16.2 2012-08-26 Encode::Byte(3pm)
Man Page