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Diffstat (limited to 'pod/perlop.pod')
| -rw-r--r-- | pod/perlop.pod | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/pod/perlop.pod b/pod/perlop.pod index d932704666..c5d7f3fc1d 100644 --- a/pod/perlop.pod +++ b/pod/perlop.pod @@ -1802,17 +1802,21 @@ operation you intend by using C<""> or C<0+>, as in the examples below. See L<perlfunc/vec> for information on how to manipulate individual bits in a bit vector. -=head2 Version tuples +=head2 Strings of Character -A literal of the form C<v1.20.300.4000> is parsed as a dual-valued quantity. -It has the string value of C<"\x{1}\x{14}\x{12c}\x{fa0}"> (i.e., a UTF-8 -string) and a numeric value of C<1 + 20/1000 + 300/1000000 + 4000/1000000000>. -This is useful for representing Unicode strings, and for comparing version -numbers using the string comparison operators, C<cmp>, C<gt>, C<lt> etc. +A literal of the form C<v1.20.300.4000> is parsed as a string composed +of characters with the specified ordinals. This provides an alternative, +more readable way to construct strings, rather than use the somewhat less +readable interpolation form C<"\x{1}\x{14}\x{12c}\x{fa0}">. This is useful +for representing Unicode strings, and for comparing version "numbers" +using the string comparison operators, C<cmp>, C<gt>, C<lt> etc. -Such "version tuples" or "vectors" are accepted by both C<require> and -C<use>. The C<$^V> variable contains the running Perl interpreter's -version in this format. See L<perlvar/$^V>. +If there are two or more dots in the literal, the leading C<v> may be +omitted. + +Such literals are accepted by both C<require> and C<use> for doing a version +check. The C<$^V> special variable also contains the running Perl +interpreter's version in this form. See L<perlvar/$^V>. =head2 Integer Arithmetic |