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-package utf8;
-
-$utf8::hint_bits = 0x00800000;
-
-our $VERSION = '1.00';
-
-sub import {
- $^H |= $utf8::hint_bits;
- $enc{caller()} = $_[1] if $_[1];
-}
-
-sub unimport {
- $^H &= ~$utf8::hint_bits;
-}
-
-sub AUTOLOAD {
- require "utf8_heavy.pl";
- goto &$AUTOLOAD if defined &$AUTOLOAD;
- Carp::croak("Undefined subroutine $AUTOLOAD called");
-}
-
-1;
-__END__
-
-=head1 NAME
-
-utf8 - Perl pragma to enable/disable UTF-8 (or UTF-EBCDIC) in source code
-
-=head1 SYNOPSIS
-
- use utf8;
- no utf8;
-
-=head1 DESCRIPTION
-
-The C<use utf8> pragma tells the Perl parser to allow UTF-8 in the
-program text in the current lexical scope (allow UTF-EBCDIC on EBCDIC based
-platforms). The C<no utf8> pragma tells Perl to switch back to treating
-the source text as literal bytes in the current lexical scope.
-
-This pragma is primarily a compatibility device. Perl versions
-earlier than 5.6 allowed arbitrary bytes in source code, whereas
-in future we would like to standardize on the UTF-8 encoding for
-source text. Until UTF-8 becomes the default format for source
-text, this pragma should be used to recognize UTF-8 in the source.
-When UTF-8 becomes the standard source format, this pragma will
-effectively become a no-op. For convenience in what follows the
-term I<UTF-X> is used to refer to UTF-8 on ASCII and ISO Latin based
-platforms and UTF-EBCDIC on EBCDIC based platforms.
-
-Enabling the C<utf8> pragma has the following effect:
-
-=over 4
-
-=item *
-
-Bytes in the source text that have their high-bit set will be treated
-as being part of a literal UTF-8 character. This includes most
-literals such as identifier names, string constants, and constant
-regular expression patterns.
-
-On EBCDIC platforms characters in the Latin 1 character set are
-treated as being part of a literal UTF-EBCDIC character.
-
-=back
-
-Note that if you have bytes with the eighth bit on in your script
-(for example embedded Latin-1 in your string literals), C<use utf8>
-will be unhappy since the bytes are most probably not well-formed
-UTF-8. If you want to have such bytes and use utf8, you can disable
-utf8 until the end the block (or file, if at top level) by C<no utf8;>.
-
-=head2 Utility functions
-
-The following functions are defined in the C<utf8::> package by the perl core.
-
-=over 4
-
-=item * $num_octets = utf8::upgrade($string);
-
-Converts (in-place) internal representation of string to Perl's internal
-I<UTF-X> form. Returns the number of octets necessary to represent
-the string as I<UTF-X>. Can be used to make sure that the
-UTF-8 flag is on, so that C<\w> or C<lc()> work as expected on strings
-containing characters in the range 0x80-0xFF. Note that this should
-not be used to convert
-a legacy byte encoding to Unicode: use Encode for that. Affected
-by the encoding pragma.
-
-=item * utf8::downgrade($string[, FAIL_OK])
-
-Converts (in-place) internal representation of string to be un-encoded
-bytes. Returns true on success. On failure dies or, if the value of
-FAIL_OK is true, returns false. Can be used to make sure that the
-UTF-8 flag is off, e.g. when you want to make sure that the substr()
-or length() function works with the usually faster byte algorithm.
-Note that this should not be used to convert Unicode back to a legacy
-byte encoding: use Encode for that. B<Not> affected by the encoding
-pragma.
-
-=item * utf8::encode($string)
-
-Converts (in-place) I<$string> from logical characters to octet
-sequence representing it in Perl's I<UTF-X> encoding. Same as
-Encode::encode_utf8(). Note that this should not be used to convert
-a legacy byte encoding to Unicode: use Encode for that.
-
-=item * $flag = utf8::decode($string)
-
-Attempts to convert I<$string> in-place from Perl's I<UTF-X> encoding
-into logical characters. Same as Encode::decode_utf8(). Note that this
-should not be used to convert Unicode back to a legacy byte encoding:
-use Encode for that.
-
-=item * $flag = utf8::valid(STRING)
-
-[INTERNAL] Test whether STRING is in a consistent state. Will return
-true if string is held as bytes, or is well-formed UTF-8 and has the
-UTF-8 flag on. Main reason for this routine is to allow Perl's
-testsuite to check that operations have left strings in a consistent
-state.
-
-=back
-
-C<utf8::encode> is like C<utf8::upgrade>, but the UTF8 flag is
-cleared. See L<perlunicode> for more on the UTF8 flag and the C API
-functions C<sv_utf8_upgrade>, C<sv_utf8_downgrade>, C<sv_utf8_encode>,
-and C<sv_utf8_decode>, which are wrapped by the Perl functions
-C<utf8::upgrade>, C<utf8::downgrade>, C<utf8::encode> and
-C<utf8::decode>. Note that in the Perl 5.8.0 implementation the
-functions utf8::valid, utf8::encode, utf8::decode, utf8::upgrade,
-and utf8::downgrade are always available, without a C<require utf8>
-statement-- this may change in future releases.
-
-=head1 BUGS
-
-One can have Unicode in identifier names, but not in package/class or
-subroutine names. While some limited functionality towards this does
-exist as of Perl 5.8.0, that is more accidental than designed; use of
-Unicode for the said purposes is unsupported.
-
-One reason of this unfinishedness is its (currently) inherent
-unportability: since both package names and subroutine names may need
-to be mapped to file and directory names, the Unicode capability of
-the filesystem becomes important-- and there unfortunately aren't
-portable answers.
-
-=head1 SEE ALSO
-
-L<perlunicode>, L<bytes>
-
-=cut