{"id":87170,"date":"2020-07-04T19:42:14","date_gmt":"2020-07-04T17:42:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/analiz-riskov-pri-voploshhenii-v-zhizn-inicziativy-perl-7"},"modified":"2020-07-04T19:42:14","modified_gmt":"2020-07-04T17:42:14","slug":"analiz-riskov-pri-voploshhenii-v-zhizn-inicziativy-perl-7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/analiz-riskov-pri-voploshhenii-v-zhizn-inicziativy-perl-7","title":{"rendered":"Anal\u00fdza riz\u00edk pri realiz\u00e1cii iniciat\u00edvy Perl 7","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dan Book (<noindex><a rel=\"nofollow\" href=\"https:\/\/metacpan.org\/author\/DBOOK\">Dan Book<\/a><\/noindex>), ktor\u00fd podporuje viac ne\u017e 70 modulov v CPAN, <noindex><a rel=\"nofollow\" href=\"http:\/\/blogs.perl.org\/users\/grinnz\/2020\/07\/perl-7-a-risk-benefit-analysis.html\">vykonal anal\u00fdzu<\/a><\/noindex> riz\u00edk pri realiz\u00e1cii navrhnut\u00e9ho <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53226\">pl\u00e1nu implement\u00e1cie Perl 7<\/a><\/noindex>Pripom\u00edname, \u017ee v verzii Perl 7 pl\u00e1nuj\u00fa predvolene zahrn\u00fa\u0165 re\u017eim pr\u00edsnej kontroly \u201estrict\u201c, aktivova\u0165 \u201euse warnings\u201c a zmeni\u0165 hodnoty nieko\u013ek\u00fdch parametrov, ktor\u00e9 ovplyv\u0148uj\u00fa kompatibilitu so star\u00fdm k\u00f3dom.<\/p>\n<p>O\u010dak\u00e1va sa, \u017ee t\u00e1to zmena povedie k nefunk\u010dnosti ve\u013ek\u00e9ho mno\u017estva modulov z CPAN v Perl 7 a bude si vy\u017eadova\u0165 \u00fapravy v ka\u017edom takom module, \u010do je nerealistick\u00e9 uskuto\u010dni\u0165 v pl\u00e1novanom roku, najm\u00e4 s oh\u013eadom na to, \u017ee nie v\u0161etci autori s\u00fa st\u00e1le dostupn\u00ed. Novinky z Perl 7 tie\u017e neumo\u017enia pou\u017e\u00edva\u0165 moduly, ktor\u00e9 s\u00fa ur\u010den\u00e9 na podporu nielen najnov\u0161ej verzie Perl.<\/p>\n<p>Okrem toho sa spom\u00ednaj\u00fa aj mo\u017en\u00e9 probl\u00e9my:<\/p>\n<ul>\n<li class=\"l\"> Zamie\u0148anie u nov\u00e1\u010dikov v d\u00f4sledku nefunk\u010dnosti niektor\u00fdch pr\u00edkladov a odpor\u00fa\u010dan\u00ed v pr\u00edru\u010dk\u00e1ch, ktor\u00e9 boli nap\u00edsan\u00e9 pre Perl 5, v Perl 7.\n<li class=\"l\"> Nebolo presk\u00faman\u00e9 vplyv na v\u00fdvoj jednor\u00e1dkov\u00fdch skriptov. Perl sa akt\u00edvne pou\u017e\u00edva nielen na p\u00edsanie ve\u013ek\u00fdch skriptov, ale aj na vytv\u00e1ranie jednor\u00e1dkov\u00fdch a kr\u00e1tkych sc\u00e9narov pre potreby administr\u00e1torov, v ktor\u00fdch je pou\u017eitie re\u017eimu strict nadbyto\u010dn\u00e9.\n<li class=\"l\"> Distrib\u00facie \u010del\u00ed probl\u00e9mom s narazov\u00fdm dod\u00e1van\u00edm spustite\u013en\u00fdch s\u00faborov na sp\u00fa\u0161\u0165anie skriptov Perl 7 a Perl 5 (o\u010dak\u00e1va sa opakovanie hist\u00f3rie s Python 2 a 3).\n<li class=\"l\"> K\u00f3d nap\u00edsan\u00fd pre Perl 7 nem\u00e1 povinnos\u0165 v\u00fdslovne ozna\u010dova\u0165, \u017ee nebude fungova\u0165 v Perl 5, mnoh\u00ed v\u00fdvoj\u00e1ri nebud\u00fa uv\u00e1dza\u0165 minim\u00e1lne podporovan\u00fa verziu.\n<li class=\"l\"> R\u00f4zne utilitky a moduly, viazan\u00e9 na Perl 5, si vy\u017eaduj\u00fa opravy.\n<li class=\"l\"> Pr\u00edprava Perl 7 kv\u00f4li presunu zdrojov na nejak\u00fd \u010das zmraz\u00ed v\u00fdvoj nov\u00fdch funkci\u00ed Perl.\n<li class=\"l\"> Objavuje sa riziko vyhorenia a odchodu akt\u00edvnych v\u00fdvoj\u00e1rov interpretera Perl, modulov, n\u00e1strojov a sprievodn\u00fdch bal\u00edkov kv\u00f4li vzniku ve\u013ekej dodato\u010dnej z\u00e1\u0165a\u017ee bez n\u00e1le\u017eitej motiv\u00e1cie (nie v\u0161etci s\u00fahlasia s potrebou vytvorenia Perl 7).\n<li class=\"l\"> Kult\u00fara v komunite a pr\u00edstup k stabilite Perl sa z\u00e1sadne zmen\u00ed.\n<li class=\"l\"> Bude naru\u0161en\u00e1 autorita jazyka v d\u00f4sledku kritiky za poru\u0161ovanie kompatibility Perl 7 so existuj\u00facim k\u00f3dom pri absencii nie\u010doho z\u00e1sadne nov\u00e9ho.\n<\/ul>\n<p>Aby sa zmiernili negat\u00edvne n\u00e1sledky, Dan Book navrhol svoj pl\u00e1n, ktor\u00fd umo\u017en\u00ed vyhn\u00fa\u0165 sa rozporu s kompatibilitou. Navrhuje sa zachova\u0165 predch\u00e1dzaj\u00faci proces v\u00fdvoja a namiesto 5.34.0 priradi\u0165 bud\u00facej verzii \u010d\u00edslo 7.0.0, v ktorej sa vypne podpora nepriamej not\u00e1cie volania objektov a zapn\u00fa niektor\u00e9 nov\u00e9 funkcie, ako napr\u00edklad try\/catch. Zmeny ako \u201euse strict\u201c a \u201euse warnings\u201c sa navrhuj\u00fa regulova\u0165 explicitn\u00fdm ur\u010den\u00edm verzie Perl v k\u00f3de cez pragmu \u201euse v7\u201c (strict je u\u017e predvolene zapnut\u00fd pre \u201euse v5.12\u201c a nov\u0161ie verzie). <\/p>\n<p>Predvolene sa odpor\u00fa\u010da v interpretovi zachova\u0165 s\u00fabor parametrov, ktor\u00fd sa nel\u00ed\u0161i od Perl 5, okrem \u0161tandardn\u00e9ho procesu \u010distenia zastaran\u00e9ho syntaxu, ktor\u00fd sa pou\u017e\u00edval aj predt\u00fdm. Podporu star\u00fdch funkci\u00ed a zastaran\u00e9ho syntaxu je mo\u017en\u00e9 aj na\u010falej ukon\u010di\u0165 pod\u013ea existuj\u00facich pravidiel pre prevod funk\u010dnosti do kateg\u00f3rie zastaranej. Signalizova\u0165 pou\u017e\u00edvanie nov\u00fdch prvkov Perl 7 v k\u00f3de a na oddelenie nov\u00e9ho a star\u00e9ho \u0161t\u00fdlu sa navrhuje pomocou pragmy \u201euse v7\u201c.<\/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=53284\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u044d\u043d \u0411\u0443\u043a (Dan Book), \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u0431\u043e\u043b\u0435\u0435 70 \u043c\u043e\u0434\u0443\u043b\u0435\u0439 \u0432 CPAN, \u043f\u0440\u043e\u0432\u0451\u043b \u0430\u043d\u0430\u043b\u0438\u0437 \u0440\u0438\u0441\u043a\u043e\u0432 \u043f\u0440\u0438 \u0432\u043e\u043f\u043b\u043e\u0449\u0435\u043d\u0438\u0438 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u043e\u0433\u043e \u043f\u043b\u0430\u043d\u0430 \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u0438\u044f Perl 7. \u041d\u0430\u043f\u043e\u043c\u043d\u0438\u043c, \u0447\u0442\u043e \u0432 \u0432\u0435\u0442\u043a\u0435 Perl 7 \u043d\u0430\u043c\u0435\u0440\u0435\u0432\u0430\u044e\u0442\u0441\u044f \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0440\u0435\u0436\u0438\u043c \u0441\u0442\u0440\u043e\u0433\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 &#171;strict&#187;, \u0430\u043a\u0442\u0438\u0432\u0438\u0440\u043e\u0432\u0430\u0442\u044c &#171;use warnings&#187; \u0438 \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0440\u044f\u0434\u0430 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432, \u0432\u043b\u0438\u044f\u044e\u0449\u0438\u0445 \u043d\u0430 \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u044c \u0441\u043e \u0441\u0442\u0430\u0440\u044b\u043c \u043a\u043e\u0434\u043e\u043c. \u041e\u0436\u0438\u0434\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043f\u0440\u0438\u0432\u0435\u0434\u0451\u0442 \u043a \u043d\u0435\u0440\u0430\u0431\u043e\u0442\u043e\u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u0438 \u0432 [&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-87170","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u044d\u043d \u0411\u0443\u043a (Dan Book), 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