locale(3perl) Perl Programmers Reference Guide locale(3perl)NAMElocale - Perl pragma to use or avoid POSIX locales for built-in
operations
SYNOPSIS
@x = sort @y; # Unicode sorting order
{
use locale;
@x = sort @y; # Locale-defined sorting order
}
@x = sort @y; # Unicode sorting order again
DESCRIPTION
This pragma tells the compiler to enable (or disable) the use of POSIX
locales for built-in operations (for example, LC_CTYPE for regular
expressions, LC_COLLATE for string comparison, and LC_NUMERIC for
number formatting). Each "use locale" or "no locale" affects
statements to the end of the enclosing BLOCK.
Starting in Perl 5.16, a hybrid mode for this pragma is available,
use locale ':not_characters';
which enables only the portions of locales that don't affect the
character set (that is, all except LC_COLLATE and LC_CTYPE). This is
useful when mixing Unicode and locales, including UTF-8 locales.
use locale ':not_characters';
use open ":locale"; # Convert I/O to/from Unicode
use POSIX qw(locale_h); # Import the LC_ALL constant
setlocale(LC_ALL, ""); # Required for the next statement
# to take effect
printf "%.2f\n", 12345.67' # Locale-defined formatting
@x = sort @y; # Unicode-defined sorting order.
# (Note that you will get better
# results using Unicode::Collate.)
See perllocale for more detailed information on how Perl supports
locales.
NOTE
If your system does not support locales, then loading this module will
cause the program to die with a message:
"Your vendor does not support locales, you cannot use the locale
module."
perl v5.18.2 2013-11-04 locale(3perl)