3 $utf8::hint_bits = 0x00800000;
6 $^H |= $utf8::hint_bits;
7 $enc{caller()} = $_[1] if $_[1];
11 $^H &= ~$utf8::hint_bits;
15 require "utf8_heavy.pl";
24 utf8 - Perl pragma to enable/disable UTF-8 in source code
33 WARNING: The implementation of Unicode support in Perl is incomplete.
34 Expect sudden and unannounced changes!
36 The C<use utf8> pragma tells the Perl parser to allow UTF-8 in the
37 program text in the current lexical scope. The C<no utf8> pragma
38 tells Perl to switch back to treating the source text as literal
39 bytes in the current lexical scope.
41 This pragma is primarily a compatibility device. Perl versions
42 earlier than 5.6 allowed arbitrary bytes in source code, whereas
43 in future we would like to standardize on the UTF-8 encoding for
44 source text. Until UTF-8 becomes the default format for source
45 text, this pragma should be used to recognize UTF-8 in the source.
46 When UTF-8 becomes the standard source format, this pragma will
47 effectively become a no-op.
49 Enabling the C<utf8> pragma has the following effects:
55 Bytes in the source text that have their high-bit set will be treated
56 as being part of a literal UTF-8 character. This includes most literals
57 such as identifiers, string constants, constant regular expression patterns
62 In the absence of inputs marked as UTF-8, regular expressions within the
63 scope of this pragma will default to using character semantics instead
66 @bytes_or_chars = split //, $data; # may split to bytes if data
69 use utf8; # force char semantics
70 @chars = split //, $data; # splits characters
75 L<perlunicode>, L<bytes>