+ release => '2015-06-01',
+ distro => {
+ ubuntu => '16.04 LTS', # xenial
+ },
+ },
+
+ v5.24 => {
+ new => [
+ [q"<code>printf '%.*2$x'</code>", 'reordered precision arguments'],
+ ['<code>/\b{lb}/</code>', 'line break boundary type (position suitable for hyphenation)'],
+ ['<code>/faster/</code>', 'various significant speedups, notably matching fixed substrings, <code>/i</code> on caseless languages, 64-bit arithmetic, scope overhead'],
+ ],
+ unicode => '8.0',
+ release => '2016-05-09',
+ distro => {
+ debian => '9', # stretch 2017-06
+ ubuntu => '17.04', # zesty
+ freebsd => '10',
+ },
+ },
+
+ v5.26 => {
+ new => [
+ ['<code><<~EOT</code>', 'indented here-docs, strips same whitespace before delimiter in each line'],
+ ['<code>@{^CAPTURE}</code>', q"array of last match's captures, so <code>${^CAPTURE}[0]</code> is <code>$1</code>"],
+ ['<code>//xx</code>', 'extended modifier to also ignore whitespace in bracketed character classes'],
+ ],
+ unicode => '9.0', # also Script_Extensions/scx in "\p{script}"
+ release => '2017-05-30',
+ distro => {
+ ubuntu => '17.10', # artful
+ },
+ },
+
+ v5.28 => {
+ new => [
+ ['<code>delete %hash{…}</code>', 'hash slices can be deleted with key+value pairs'],
+ ['<code>/(*…)/</code>', 'alphabetic synonyms for assertions, e.g. <code>(*atomic:…)</code> for <code>(?>…)</code> and <code>(*nlb:…)</code> for <code>(?<!…)</code>', {experimental => 'alpha_assertions'}],
+ ['<code>/(*script_run:)/</code>', 'enforces all characters to be from the same script', {experimental => 'script_run'}],
+ ['<code>state @a</code>', 'persistent lexical array or hash variables'],
+ ['<code>perl -i -pe die</code>', 'safe in-place editing: files are replaced only after successful completion'],
+ ['<code>${^SAFE_LOCALES}</code>', 'locales are thread-safe on supported systems, indicated by this variable'],
+ ],
+ unicode => '10.0',
+ release => '2018-06-22',
+ distro => {
+ },