{"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\/cs\/blog\/news\/analiz-riskov-pri-voploshhenii-v-zhizn-inicziativy-perl-7","title":{"rendered":"Anal\u00fdza rizik p\u0159i realizaci iniciativy 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>), kter\u00fd podporuje v\u00edce ne\u017e 70 modul\u016f v CPAN, <noindex><a rel=\"nofollow\" href=\"http:\/\/blogs.perl.org\/users\/grinnz\/2020\/07\/perl-7-a-risk-benefit-analysis.html\">provedl anal\u00fdzu<\/a><\/noindex> rizik p\u0159i realizaci navr\u017een\u00e9ho <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53226\">pl\u00e1nu implementace Perl 7<\/a><\/noindex>. P\u0159ipom\u00edn\u00e1me, \u017ee v Perl 7 se pl\u00e1nuje v\u00fdchoz\u00ed aktivace re\u017eimu p\u0159\u00edsn\u00e9 kontroly \u201estrict\u201c, aktivace \u201euse warnings\u201c a zm\u011bna hodnoty n\u011bkolika parametr\u016f, kter\u00e9 ovliv\u0148uj\u00ed kompatibilitu se star\u00fdm k\u00f3dem.<\/p>\n<p>O\u010dek\u00e1v\u00e1 se, \u017ee tato zm\u011bna povede k nefunk\u010dnosti velk\u00e9ho mno\u017estv\u00ed modul\u016f z CPAN v Perl 7 a bude vy\u017eadovat \u00fapravy ka\u017ed\u00e9ho takov\u00e9ho modulu, co\u017e je nerealistick\u00e9 realizovat b\u011bhem pl\u00e1novan\u00e9ho roku, zejm\u00e9na s ohledem na to, \u017ee ne v\u0161ichni auto\u0159i jsou st\u00e1le k dispozici. Novinky z Perl 7 rovn\u011b\u017e neumo\u017en\u00ed pou\u017e\u00edvat moduly, kter\u00e9 byly navr\u017eeny pro podporu nejen posledn\u00ed verze Perl.<\/p>\n<p>D\u00e1le se zmi\u0148uj\u00ed mo\u017en\u00e9 probl\u00e9my:<\/p>\n<ul>\n<li class=\"l\"> Zmatek u nov\u00e1\u010dk\u016f kv\u016fli nefunk\u010dnosti n\u011bkter\u00fdch p\u0159\u00edklad\u016f a doporu\u010den\u00ed z p\u0159\u00edru\u010dek napsan\u00fdch pro Perl 5 v Perl 7.\n<li class=\"l\"> Nen\u00ed prozkoum\u00e1n vliv na v\u00fdvoj jednor\u00e1zov\u00fdch skript\u016f. Perl se aktivn\u011b pou\u017e\u00edv\u00e1 nejen k psan\u00ed velk\u00fdch skript\u016f, ale i k vytv\u00e1\u0159en\u00ed jednor\u00e1zov\u00fdch skript\u016f a kr\u00e1tk\u00fdch sc\u00e9n\u00e1\u0159\u016f pro pot\u0159eby spr\u00e1vc\u016f, kde je pou\u017eit\u00ed re\u017eimu strict nadbyte\u010dn\u00e9.\n<li class=\"l\"> Distribuce \u010del\u00ed probl\u00e9mu sou\u010dasn\u00e9ho dod\u00e1v\u00e1n\u00ed spustiteln\u00fdch soubor\u016f pro spu\u0161t\u011bn\u00ed skript\u016f Perl 7 a Perl 5 (o\u010dek\u00e1v\u00e1 se opakov\u00e1n\u00ed historie s Pythonem 2 a 3).\n<li class=\"l\"> K\u00f3d napsan\u00fd pro Perl 7 nemus\u00ed zvl\u00e1\u0161\u0165 zd\u016fraz\u0148ovat, \u017ee nebude fungovat v Perl 5, mnoz\u00ed v\u00fdvoj\u00e1\u0159i nebudou uv\u00e1d\u011bt minim\u00e1ln\u011b podporovanou verzi.\n<li class=\"l\"> R\u016fzn\u00e9 n\u00e1stroje a moduly spojen\u00e9 s Perl 5 budou vy\u017eadovat opravy.\n<li class=\"l\"> P\u0159\u00edprava Perl 7 kv\u016fli redistribuci zdroj\u016f na n\u011bjakou dobu zmraz\u00ed v\u00fdvoj nov\u00fdch funkc\u00ed Perl.\n<li class=\"l\"> Objevuje se riziko vyho\u0159en\u00ed a odchodu aktivn\u00edch v\u00fdvoj\u00e1\u0159\u016f interpret\u00e1toru Perl, modul\u016f, n\u00e1stroj\u016f a dopl\u0148kov\u00fdch bal\u00ed\u010dk\u016f kv\u016fli velk\u00e9mu dodate\u010dn\u00e9mu zat\u00ed\u017een\u00ed bez \u0159\u00e1dn\u00e9 motivace (ne v\u0161ichni souhlas\u00ed s nezbytnost\u00ed vytvo\u0159en\u00ed Perl 7).\n<li class=\"l\"> Z\u00e1kladn\u011b se zm\u011bn\u00ed kultura v komunit\u011b a postoj k stabilit\u011b Perl.\n<li class=\"l\"> Bude podkop\u00e1na autorita jazyka kv\u016fli kritice, \u017ee Perl 7 poru\u0161uje kompatibilitu se st\u00e1vaj\u00edc\u00edm k\u00f3dem p\u0159i absenci n\u011b\u010deho z\u00e1sadn\u011b nov\u00e9ho.\n<\/ul>\n<p>Aby se zm\u00edrnily negativn\u00ed dopady, p\u0159edlo\u017eil Dan Book sv\u016fj pl\u00e1n, kter\u00fd umo\u017en\u00ed vyhnout se p\u0159eru\u0161en\u00ed kompatibility. Navrhuje se zachovat dosavadn\u00ed proces v\u00fdvoje a m\u00edsto verze 5.34.0 p\u0159i\u0159adit n\u00e1sleduj\u00edc\u00edmu vyd\u00e1n\u00ed \u010d\u00edslo 7.0.0, ve kter\u00e9m se vypne podpora nep\u0159\u00edm\u00e9 notace vol\u00e1n\u00ed objekt\u016f a zapnou se n\u011bkter\u00e9 nov\u00e9 mo\u017enosti, jako nap\u0159\u00edklad try\/catch. Zm\u011bny, jako jsou \u201euse strict\u201c a \u201euse warnings\u201c, se navrhuj\u00ed regulovat v\u00fdslovn\u00fdm uveden\u00edm verze Perl v k\u00f3du pomoc\u00ed pragmat \u201euse v7\u201c (strict se ji\u017e v\u00fdchoz\u00edm zp\u016fsobem aktivuje pro \u201euse v5.12\u201c a nov\u011bj\u0161\u00ed verze). <\/p>\n<p>Ve v\u00fdchoz\u00edm nastaven\u00ed je doporu\u010deno zachovat sadu parametr\u016f, kter\u00e1 se neli\u0161\u00ed od Perl 5, s v\u00fdjimkou standardn\u00edho procesu \u010dist\u00ed pou\u017eit\u00fd zastaral\u00fd syntaktick\u00fd z\u00e1pis. Podporu star\u00fdch funkc\u00ed a zastaral\u00e9ho syntaktick\u00e9ho z\u00e1pisu lze i nad\u00e1le ukon\u010dovat podle st\u00e1vaj\u00edc\u00edch pravidel p\u0159evodu funkcionality do kategorie zastaral\u00fdch. Signalizovat pou\u017eit\u00ed nov\u00fdch prvk\u016f Perl 7 v k\u00f3du a pro odd\u011blen\u00ed nov\u00e9ho a star\u00e9ho stylu se navrhuje pomoc\u00ed pragmat \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 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u044d\u043d \u0411\u0443\u043a (Dan Book), 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