{"id":86435,"date":"2020-06-25T01:42:12","date_gmt":"2020-06-24T23:42:12","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/anonsirovan-perl-7"},"modified":"2020-06-25T01:42:12","modified_gmt":"2020-06-24T23:42:12","slug":"anonsirovan-perl-7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/anonsirovan-perl-7","title":{"rendered":"Ozn\u00e1men\u00fd Perl 7","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Na virtu\u00e1lnej konferencii v\u00fdvoj\u00e1rov jazyka Perl, ktor\u00e1 sa kon\u00e1 dnes, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.perl.com\/article\/announcing-perl-7\/\">bol ohl\u00e1sen\u00fd<\/a><\/noindex> projekt Perl 7, ktor\u00fd plynulo pokra\u010duje v rozvoji vetvy Perl 5 bez radik\u00e1lnych zmien. Perl 7 bude podobn\u00fd vydaniu <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53207\">Perl 5.32.0<\/a><\/noindex>, s v\u00fdnimkou in\u00fdch predvolen\u00fdch nastaven\u00ed, ktor\u00e9 lep\u0161ie zodpovedaj\u00fa s\u00fa\u010dasn\u00fdm praktik\u00e1m v\u00fdvoja. Inak zostane Perl 7 t\u00fdm ist\u00fdm Perl 5 a zachov\u00e1 kompatibilitu s predt\u00fdm vytvoren\u00fdmi aplik\u00e1ciami.<\/p>\n<p>V\u00fdznamn\u00e1 zmena \u010d\u00edsla verzie sa stane ak\u00fdmsi odde\u013eova\u010dom prechodn\u00e9ho obdobia k nov\u00e9mu modelu zvy\u0161ovania funk\u010dnosti jazyka Perl bez podstatn\u00e9ho naru\u0161enia sp\u00e4tnej kompatibility.<br \/>\nPredpoklad\u00e1 sa, \u017ee vytvorenie Perl 7 pom\u00f4\u017ee pritiahnu\u0165 nov\u00fdch v\u00fdvoj\u00e1rov a zjednodu\u0161i\u0165 proces prid\u00e1vania v\u00fdznamn\u00fdch nov\u00fdch funkci\u00ed do jazyka, pri\u010dom sa zachov\u00e1 kompatibilita s k\u00f3dovou z\u00e1klad\u0148ou existuj\u00facich projektov. \u010c\u00edslo 7 bolo zvolen\u00e9, preto\u017ee Perl 6 bol pou\u017eit\u00fd pri v\u00fdvoji jazyka, ktor\u00fd teraz <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51679\">se vyv\u00edj\u00ed<\/a><\/noindex> m\u00e1 samostatn\u00fd n\u00e1zov Raku. Prv\u00e9 vydanie Perl 7 sa o\u010dak\u00e1va v bud\u00facom roku. Vetva Perl 5.32 sa stane poslednou v s\u00e9rii Perl 5 a pl\u00e1nuje sa jej podpora od 5 do 10 rokov.<\/p>\n<p>Najv\u00fdraznej\u0161ou zmenou v Perli 7 bude predvolen\u00e9 zapnutie re\u017eimu \u201e<noindex><a rel=\"nofollow\" href=\"https:\/\/perldoc.perl.org\/strict.html\">strict<\/a><\/noindex>\u201e, ktor\u00fd predpoklad\u00e1 pr\u00edsnu kontrolu deklar\u00e1cie premenn\u00fdch, pou\u017e\u00edvania symbolick\u00fdch ukazovate\u013eov a prira\u010fovania podprogramov. Pou\u017e\u00edvanie \u201euse strict\u201c je dobr\u00fdm t\u00f3nom a pou\u017e\u00edva ho v\u00e4\u010d\u0161ina v\u00fdvoj\u00e1rov. Rovnako pl\u00e1nuj\u00fa predvolene zapn\u00fa\u0165 spracovanie varovan\u00ed (\u201e<noindex><a rel=\"nofollow\" href=\"https:\/\/perldoc.perl.org\/warnings.html\">use warnings<\/a><\/noindex>\u201e).<\/p>\n<p> V Perl 7 sa taktie\u017e pl\u00e1nuje stabilizova\u0165 a predvolene zakomponova\u0165 niektor\u00e9 u\u017e existuj\u00face experiment\u00e1lne funkcie, ako s\u00fa  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=39865\">signat\u00fary funkci\u00ed<\/a><\/noindex> (\u201euse feature \u2018signatures\u2019\u201c), ktor\u00e9 umo\u017e\u0148uj\u00fa pri definovan\u00ed funkcie ur\u010di\u0165 vstupn\u00e9 argumenty a automatizova\u0165 kontrolu ich po\u010dtu (bude mo\u017en\u00e9 p\u00edsa\u0165 \u201esub foo ($left, $right) {\u201c namiesto \u201esub foo { my($left, $right) = @_;}\u201c). Pl\u00e1nuj\u00fa predvolene zahrn\u00fa\u0165 aj podporu oper\u00e1tora \u201eisa\u201c na kontrolu toho, \u010di je objekt in\u0161tanciou ur\u010den\u00e9ho triedy alebo triedy odvoden\u00e9ho od nej (\u201eif( $obj isa Package::Name)\u201c, ako aj oper\u00e1ci\u00ed postfix dereferencovania (postderef) \u201e$sref-&gt;$*\u201c namiesto \u201e${ $sref }\u201c, \u201e$aref-&gt;@*\u201c namiesto \u201e@{ $aref }\u201c a \u201e$href-&gt;%{ \u2026 }\u201c namiesto \u201e%$href{ \u2026 }\u201c. <\/p>\n<p>Kandid\u00e1tmi na vypnutie predvolene v Perl 7 s\u00fa:<\/p>\n<ul>\n<li class=\"l\"> Nepriama not\u00e1cia volania objektov (\u201e<noindex><a rel=\"nofollow\" href=\"https:\/\/metacpan.org\/pod\/indirect\">nie funkcia qw(indirect)<\/a><\/noindex>\u201e) \u2014 zastaran\u00fd sp\u00f4sob volania objektov, pri ktorom sa namiesto \u201e-&gt;\u201c pou\u017e\u00edva medzera (\u201emethod $object @param\u201c namiesto \u201e$object-&gt;$method(@param)\u201c). Napr\u00edklad, namiesto \u201emy $cgi = new CGI\u201c je potrebn\u00e9 v\u017edy pou\u017e\u00edva\u0165 \u201emy $cgi = CGI-&gt;new\u201c.\n<li class=\"l\"> Hol\u00e9 s\u00faborov\u00e9 deskriptory bez deklar\u00e1cie premenn\u00fdch (\u201e<noindex><a rel=\"nofollow\" href=\"https:\/\/metacpan.org\/pod\/bareword::filehandles\">nie bareword::filehandle<\/a><\/noindex>\u201e) \u2014 pou\u017eitie kon\u0161trukci\u00ed typu \u201eopen FH, $file\u201c bude vies\u0165 k chybe, je potrebn\u00e9 pou\u017e\u00edva\u0165 \u201eopen my $fh, $file\u201c. Zmena sa nebude t\u00fdka\u0165 \u0161tandardn\u00fdch s\u00faborov\u00fdch deskriptorov STDIN, STDOUT, STDERR, ARGV, ARGVOUT a DATA.\n<li class=\"l\"> Fikt\u00edvne viacrozmern\u00e9 polia a hash-e v \u0161t\u00fdle Perl 4 (\u201e<noindex><a rel=\"nofollow\" href=\"https:\/\/metacpan.org\/pod\/multidimensional\">nie multidimensional<\/a><\/noindex>\u201e).<br \/>\nNapr\u00edklad, uvedenie \u201e$hash{1, 2}\u201c bude vies\u0165 k chybe, je potrebn\u00e9 pou\u017e\u00edva\u0165 medzimestne pole, napr\u00edklad \u201e$hash{join($;, 1, 2)}\u201c.<\/p>\n<li class=\"l\"> Deklar\u00e1cia prototypov v \u0161t\u00fdle Perl 4 (je potrebn\u00e9 pou\u017e\u00edva\u0165 \u201euse :prototype()\u201c).\n<\/ul>\n<p>V dlhodob\u00fdch pl\u00e1noch pl\u00e1nuj\u00fa predvolene zavies\u0165 podporu Unicode, \u010do zbav\u00ed v\u00fdvoj\u00e1rov potreby uv\u00e1dza\u0165 \u201euse utf8\u201c v k\u00f3de. Pre moduly a skripty, v ktor\u00fdch sa objavia probl\u00e9my s nov\u00fdmi predvo\u013ebami, je navrhnut\u00e1 mo\u017enos\u0165 obnovi\u0165 spr\u00e1vanie Perlu 5 pridan\u00edm do k\u00f3du riadku \u201euse compat::perl5\u201c. Osobitn\u00e9 nastavenia sa tie\u017e uchovaj\u00fa a bud\u00fa sa da\u0165 zmeni\u0165 samostatne.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53226\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0430 \u043f\u0440\u043e\u0445\u043e\u0434\u044f\u0449\u0435\u0439 \u0441\u0435\u0433\u043e\u0434\u043d\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0437\u044b\u043a\u0430 Perl \u0430\u043d\u043e\u043d\u0441\u0438\u0440\u043e\u0432\u0430\u043d \u043f\u0440\u043e\u0435\u043a\u0442 Perl 7, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u043b\u0430\u0432\u043d\u043e \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0438\u0442 \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0435 \u0432\u0435\u0442\u043a\u0438 Perl 5 \u0431\u0435\u0437 \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u044f \u0440\u0430\u0434\u0438\u043a\u0430\u043b\u044c\u043d\u044b\u0445 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439. Perl 7 \u0431\u0443\u0434\u0435\u0442 \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0447\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a\u0443 Perl 5.32.0, \u0437\u0430 \u0438\u0441\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435\u043c \u0438\u043d\u044b\u0445 \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043a \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e, \u043b\u0443\u0447\u0448\u0435 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0441\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438. \u0412 \u043e\u0441\u0442\u0430\u043b\u044c\u043d\u043e\u043c Perl 7 \u043e\u0441\u0442\u0430\u043d\u0435\u0442\u0441\u044f \u0442\u0435\u043c \u0436\u0435 Perl 5 \u0438 \u0441\u043e\u0445\u0440\u0430\u043d\u0438\u0442 \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u044c \u0441 \u0440\u0430\u043d\u0435\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-86435","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041d\u0430 \u043f\u0440\u043e\u0445\u043e\u0434\u044f\u0449\u0435\u0439 \u0441\u0435\u0433\u043e\u0434\u043d\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0437\u044b\u043a\u0430 Perl \u0430\u043d\u043e\u043d\u0441\u0438\u0440\u043e\u0432\u0430\u043d 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