{"id":120643,"date":"2024-11-21T01:09:45","date_gmt":"2024-11-20T23:09:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/re2c-4-0"},"modified":"2024-11-21T01:09:45","modified_gmt":"2024-11-20T23:09:45","slug":"re2c-4-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/re2c-4-0","title":{"rendered":"re2c 4.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

<\/p>\n

Mar\u021bi, 19 noiembrie, a fost lansat\u0103 re2c<\/a> \u2013 generatorul analizatorilor lexicale (care este \u0219i compilatorul expresiilor regulate \u00een cod \u00een limbajul de programare \u021bint\u0103). re2c se specializeaz\u0103 \u00een generarea de lexer-e rapide \u0219i u\u0219or de integrat. Se deosebe\u0219te de analogul s\u0103u mai cunoscut, flex, printr-o interfa\u021b\u0103 flexibil\u0103, generarea de lexer-e optimizate f\u0103r\u0103 tabel \u0219i suportul pentru extragerea submatch-urilor pe baza automatelor finite deterministe cu etichete (TDFA<\/a>). re2c este utilizat \u00een proiecte unde viteza de operare a lexerului este important\u0103, cum ar fi Ninja \u0219i PHP.<\/p>\n

<\/noindex><\/noindex> <\/p>\n

\u00cen versiunea 4.0, subsistemul de generare a codului a fost complet reproiectat, ceea ce a permis ad\u0103ugarea suportului pentru opt noi limbaje (D, Haskell, Java, JavaScript, OCaml, Python, V, Zig) pe l\u00e2ng\u0103 cele deja suportate (C\/C++, Go, Rust), precum \u0219i un mecanism comun pentru ad\u0103ugarea de noi limbaje prin fi\u0219iere de configurare. Generatorul de cod r\u0103spunde de transla\u021bia automatului finit deja construit \u0219i optimizat \u00een cod, adic\u0103 sarcina sa este s\u0103 selecteze structuri de control, tipuri de date, modelul general al programului etc. potrivite pentru limbajul \u021bint\u0103. Anterior, \u00eentreaga logic\u0103 era parte a codului surs\u0103 re2c, iar pentru a o modifica sau a ad\u0103uga un nou limbaj, era necesar s\u0103 se efectueze patch-uri pe codul surs\u0103 \u0219i s\u0103 se recompil\u0103 re2c. Aceste patch-uri nu erau acceptate \u00een depozitul principal f\u0103r\u0103 implementarea unui set standard de exemple \u0219i teste, ceea ce complica \u0219i mai mult \u00eentregul proces. Acum toat\u0103 aceast\u0103 logic\u0103 a fost mutat\u0103 \u00een fi\u0219ierele sintactice<\/a> \u2013 fi\u0219ierele de configurare textuale care pot fi furnizate de utilizator (\u00een mod implicit, re2c folose\u0219te cele standard). Codul surs\u0103 re2c este complet liber de detalii specifice limbajului \u0219i se bazeaz\u0103 doar pe fi\u0219ierul sintactic. Utilizatorul poate suprascrie par\u021bial fi\u0219ierul sintactic existent sau poate scrie unul nou de la zero. Pentru toate limbajele oficial suportate exist\u0103 documenta\u021bie complet\u0103 cu exemple<\/a>.<\/p>\n

<\/noindex> <\/p>\n

Apropo, ideea \u00een sine a fi\u0219ierelor sintactice a ap\u0103rut datorit\u0103 unei comentarii pe LOR<\/a>, pentru care mul\u021bumim \"re2cthe_coder<\/a>.<\/p>\n

<\/noindex> <\/p>\n

\u00cen versiune au fost incluse multe alte modific\u0103ri pentru simplificarea interfe\u021bei utilizatorului, \u00eembun\u0103t\u0103\u021birea lucrului cu grupurile de captura, precum \u0219i o mediu online pentru editarea \u0219i compilarea exemplelor: http:\/\/re2c.org\/playground<\/a>.<\/p>\n

<\/noindex><\/p>\n

Sursa: linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412\u043e \u0432\u0442\u043e\u0440\u043d\u0438\u043a, 19 \u043d\u043e\u044f\u0431\u0440\u044f, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 re2c – \u0433\u0435\u043d\u0435\u0440\u0430\u0442\u043e\u0440\u0430 \u043b\u0435\u043a\u0441\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0430\u043d\u0430\u043b\u0438\u0437\u0430\u0442\u043e\u0440\u043e\u0432 (\u043e\u043d \u0436\u0435 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440 \u0440\u0435\u0433\u0443\u043b\u044f\u0440\u043d\u044b\u0445 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0439 \u0432 \u043a\u043e\u0434 \u043d\u0430 \u0446\u0435\u043b\u0435\u0432\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f). re2c \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043d\u0430 \u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u0438 \u0431\u044b\u0441\u0442\u0440\u044b\u0445 \u0438 \u043b\u0435\u0433\u043a\u043e \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u043b\u0435\u043a\u0441\u0435\u0440\u043e\u0432. \u041e\u043d \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u043e\u0442 \u0431\u043e\u043b\u0435\u0435 \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u043e\u0433\u043e \u0430\u043d\u0430\u043b\u043e\u0433\u0430 flex \u0433\u0438\u0431\u043a\u0438\u043c \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u043e\u043c, \u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u0435\u0439 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043d\u0435\u0442\u0430\u0431\u043b\u0438\u0447\u043d\u044b\u0445 \u043b\u0435\u043a\u0441\u0435\u0440\u043e\u0432 \u0438 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 \u0437\u0430\u0445\u0432\u0430\u0442\u043e\u0432 (submatch extraction) \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u0434\u0435\u0442\u0435\u0440\u043c\u0438\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043a\u043e\u043d\u0435\u0447\u043d\u044b\u0445 \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u043e\u0432 \u0441 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":120644,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-120643","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47re2c 4.0 | ProHoster","description":"Mar\u021bi, 19 noiembrie, a fost lansat\u0103 versiunea re2c \u2013 generatorul de analizatori lexici (compilatorul expresiilor regulate \u00een cod 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