NAME

       utf8::all - turn on Unicode - all of it

VERSION

       version 0.017

SYNOPSIS

           use utf8::all;                      # Turn on UTF-8, all of it.

           open my $in, '<', 'contains-utf8';  # UTF-8 already turned on here
           print length 'foo bXr';             # 7 UTF-8 characters
           my $utf8_arg = shift @ARGV;         # @ARGV is UTF-8 too (only for main)

DESCRIPTION

       The "use utf8" pragma tells the Perl parser to allow UTF-8 in the program text in the current lexical
       scope. This also means that you can now use literal Unicode characters as part of strings, variable
       names, and regular expressions.

       "utf8::all" goes further:

       •   "charnames"  are  imported  so "\N{...}" sequences can be used to compile Unicode characters based on
           names.

       •   On Perl "v5.11.0" or higher, the "use feature 'unicode_strings'" is enabled.

       •   "use feature fc" and "use feature unicode_eval" are enabled on Perl 5.16.0 and higher.

       •   Filehandles are opened with UTF-8 encoding turned on by default (including  STDIN,  STDOUT,  STDERR).
           Meaning  that they automatically convert UTF-8 octets to characters and vice versa. If you don't want
           UTF-8 for a particular filehandle, you'll have to set "binmode $filehandle".

       •   @ARGV gets converted from UTF-8 octets to Unicode characters (when "utf8::all" is used from the  main
           package). This is similar to the behaviour of the "-CA" perl command-line switch (see perlrun).

       •   "readdir",  "readlink",  "readpipe"  (including  the  "qx//"  and  backtick  operators),  and  "glob"
           (including the "<>" operator) now all work with and return  Unicode  characters  instead  of  (UTF-8)
           octets.

   Lexical scope
       The pragma is lexically-scoped, so you can do the following if you had some reason to:

           {
               use utf8::all;
               open my $out, '>', 'outfile';
               my $utf8_str = 'foo bXr';
               print length $utf8_str, "\n"; # 7
               print $out $utf8_str;         # out as utf8
           }
           open my $in, '<', 'outfile';      # in as raw
           my $text = do { local $/; <$in>};
           print length $text, "\n";         # 10, not 7!

       Instead of lexical scoping, you can also use "no utf8::all" to turn off the effects.

       Note that the effect on @ARGV and the "STDIN", "STDOUT", and "STDERR" file handles is always global!

SEE ALSO

       •   File::Find::utf8 for fully utf-8 aware File::Find functions.

       •   Cwd::utf8 for fully utf-8 aware Cwd functions.

INTERACTION WITH AUTODIE

       If  you  use  autodie, which is a great idea, you need to use at least version 2.12, released on June 26,
       2012 <https://metacpan.org/source/PJF/autodie-2.12/Changes#L3>.  Otherwise, autodie  obliterates  the  IO
       layers set by the open pragma. See RT #54777 <https://rt.cpan.org/Ticket/Display.html?id=54777> and GH #7
       <https://github.com/doherty/utf8-all/issues/7>.

AVAILABILITY

       The project homepage is <http://metacpan.org/release/utf8-all/>.

       The  latest version of this module is available from the Comprehensive Perl Archive Network (CPAN). Visit
       <http://www.perl.com/CPAN/>     to     find     a     CPAN      site      near      you,      or      see
       <https://metacpan.org/module/utf8::all/>.

SOURCE

       The  development  version  is  on  github  at <http://github.com/doherty/utf8-all> and may be cloned from
       <git://github.com/doherty/utf8-all.git>

BUGS AND LIMITATIONS

       You  can  make  new  bug  reports,   and   view   existing   ones,   through   the   web   interface   at
       <https://github.com/doherty/utf8-all/issues>.

COMPATIBILITY

       The  filesystems  of  Dos,  Windows,  and OS/2 do not (fully) support UTF-8. The "readlink" and "readdir"
       functions and "glob" operators will therefore not be replaced on these systems.

AUTHORS

       •   Michael Schwern <mschwern@cpan.org>

       •   Mike Doherty <doherty@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2009 by Michael Schwern <mschwern@cpan.org>.

       This is free software; you can redistribute it and/or modify it under  the  same  terms  as  the  Perl  5
       programming language system itself.

perl v5.20.2                                       2015-11-21                                     utf8::all(3pm)