{"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\/pt\/blog\/news\/analiz-riskov-pri-voploshhenii-v-zhizn-inicziativy-perl-7","title":{"rendered":"An\u00e1lise de riscos na implementa\u00e7\u00e3o da iniciativa 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>), que suporta mais de 70 m\u00f3dulos no CPAN, <noindex><a rel=\"nofollow\" href=\"http:\/\/blogs.perl.org\/users\/grinnz\/2020\/07\/perl-7-a-risk-benefit-analysis.html\">realizou uma an\u00e1lise<\/a><\/noindex> dos riscos na implementa\u00e7\u00e3o do <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53226\">plano de implementa\u00e7\u00e3o do Perl 7<\/a><\/noindex>Lembramos que na vers\u00e3o do Perl 7, pretende-se incluir por padr\u00e3o o modo de verifica\u00e7\u00e3o estrita \u00abstrict\u00bb, ativar \u00abuse warnings\u00bb e alterar o valor de v\u00e1rios par\u00e2metros que influenciam a compatibilidade com c\u00f3digo antigo.<\/p>\n<p>Espera-se que essa mudan\u00e7a resultar\u00e1 em um grande n\u00famero de m\u00f3dulos do CPAN que n\u00e3o funcionar\u00e3o no Perl 7, exigindo altera\u00e7\u00f5es em cada um desses m\u00f3dulos, o que \u00e9 irrealista para se realizar no ano previsto, especialmente considerando que nem todos os autores est\u00e3o dispon\u00edveis. As inova\u00e7\u00f5es do Perl 7 tamb\u00e9m n\u00e3o permitir\u00e3o o uso de m\u00f3dulos que s\u00e3o projetados para suportar apenas a vers\u00e3o mais recente do Perl.<\/p>\n<p>Al\u00e9m disso, s\u00e3o mencionados os seguintes problemas poss\u00edveis:<\/p>\n<ul>\n<li class=\"l\"> Confus\u00e3o entre iniciantes devido \u00e0 inefic\u00e1cia no Perl 7 de alguns exemplos e recomenda\u00e7\u00f5es de guias escritos para Perl 5.\n<li class=\"l\"> N\u00e3o se estudou o impacto no desenvolvimento de one-liners. Perl \u00e9 amplamente utilizado n\u00e3o apenas para escrever grandes scripts, mas tamb\u00e9m para criar one-liners e pequenos scripts para as necessidades dos administradores, onde o uso do modo strict \u00e9 desnecess\u00e1rio.\n<li class=\"l\"> Distribui\u00e7\u00f5es enfrentam o problema de fornecer simultaneamente execut\u00e1veis para rodar scripts em Perl 7 e Perl 5 (espera-se uma repeti\u00e7\u00e3o da hist\u00f3ria com Python 2 e 3).\n<li class=\"l\"> O c\u00f3digo escrito para Perl 7 n\u00e3o precisa indicar particularmente que n\u00e3o poder\u00e1 funcionar no Perl 5, muitos desenvolvedores n\u00e3o indicar\u00e3o a vers\u00e3o m\u00ednima suportada.\n<li class=\"l\"> V\u00e1rias utilidades e m\u00f3dulos dependentes do Perl 5 precisar\u00e3o de corre\u00e7\u00f5es.\n<li class=\"l\"> A prepara\u00e7\u00e3o do Perl 7, devido \u00e0 realoca\u00e7\u00e3o de recursos, congelar\u00e1 o desenvolvimento de novas funcionalidades no Perl por um tempo.\n<li class=\"l\"> Surge o risco de burnout e sa\u00edda de desenvolvedores ativos do interpretador Perl, m\u00f3dulos, ferramentas e pacotes de suporte devido ao surgimento de uma grande carga adicional sem a devida motiva\u00e7\u00e3o (nem todos concordam com a necessidade de criar o Perl 7).\n<li class=\"l\"> A cultura da comunidade e a rela\u00e7\u00e3o com a estabilidade do Perl mudar\u00e3o fundamentalmente.\n<li class=\"l\"> A credibilidade da linguagem ser\u00e1 prejudicada devido a cr\u00edticas sobre a incompatibilidade do Perl 7 com o c\u00f3digo existente, sem que algo fundamentalmente novo seja apresentado.\n<\/ul>\n<p>Para atenuar as consequ\u00eancias negativas, Dan Book prop\u00f4s seu plano que permitir\u00e1 evitar a quebra de compatibilidade. Sugere-se manter o antigo processo de desenvolvimento e, em vez de 5.34.0, atribuir o n\u00famero 7.0.0 \u00e0 pr\u00f3xima vers\u00e3o, na qual a compatibilidade com a nota\u00e7\u00e3o de chamada de objetos indireta ser\u00e1 desativada e algumas novas funcionalidades, como try\/catch, ser\u00e3o inclu\u00eddas. Mudan\u00e7as como \u00abuse strict\u00bb e \u00abuse warnings\u00bb devem ser reguladas pela indica\u00e7\u00e3o expl\u00edcita da vers\u00e3o do Perl no c\u00f3digo por meio da pragm\u00e1tica \u00abuse v7\u00bb (strict j\u00e1 est\u00e1 habilitado por padr\u00e3o para \u00abuse v5.12\u00bb e vers\u00f5es mais recentes). <\/p>\n<p>Por padr\u00e3o, recomenda-se que o interpretador mantenha um conjunto de par\u00e2metros que n\u00e3o difere do Perl 5, exceto pelo processo padr\u00e3o de limpeza de sintaxes obsoletas, aplicado anteriormente. O suporte a recursos antigos e sintaxes obsoletas pode ser encerrado como antes, de acordo com as regras existentes para a transi\u00e7\u00e3o de funcionalidades para o estado obsoleto. Sinalizar o uso de novos elementos do Perl 7 e a separa\u00e7\u00e3o entre os estilos novos e antigos deve ser feito com a pragm\u00e1tica \u00abuse v7\u00bb.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <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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