+ distro => {
+ redhat => '7.0',
+ },
+ unicode => '6.1',
+ },
+
+ v5.18 => {
+ new => [
+ ['<code>${^LAST_FH}</code>', 'last read filehandle (used by <code>$.</code>)'],
+ ['<code>/(?[ a + b ])/</code>', 'regex set operations (character substraction <code>-</code>, unions <code>&</code>)'],
+ ['<code>my sub foo</code>', 'lexical subroutines (also state, our)'],
+ ['<code>next $expression</code>', 'loop controls allow runtime expressions'],
+ [q(<code>no warnings 'experimental::…'</code>), 'mechanism for experimental features, as of now required for smartmatch'],
+ ],
+ release => '2013-05-18',
+ unicode => '6.2',
+ },
+
+ v5.20 => {
+ new => [
+ ['<code>sub ($var)</code>', 'subroutine signatures'],
+ ['<code>%hash{…}</code>', 'hash slices return key+value pairs'],
+ ['<code>[]->@*</code>', 'postfix dereferencing (also e.g. <code>$scalar->$*</code> for <code>$$scalar</code>)'],
+ [q(<code>use warnings 'once'; $a</code>), 'variables $a and $b are exempt from <em>used once</em> warnings'],
+ ],
+ unicode => '6.3',
+ release => '2014-05-27',
+ distro => {
+ debian => 'jessie',
+ },