{"id":89487,"date":"2020-07-23T01:42:30","date_gmt":"2020-07-22T23:42:30","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/re2c-2-0"},"modified":"2020-07-23T01:42:30","modified_gmt":"2020-07-22T23:42:30","slug":"re2c-2-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/re2c-2-0","title":{"rendered":"re2c 2.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>U ponedjeljak 20. srpnja objavljen je re2c &ndash; generator brzih leksikalnih analizatora.<br \/>\nGlavne promjene:<\/p>\n<ul>\n<li>\n<p>Dodana je podr\u0161ka za Go jezik.<br \/>\n(uklju\u010duje se ili opcijom &#8212;lang go za re2c, ili kao posebni program re2go).<br \/>\nDokumentacija za C i Go generira se iz istog teksta, ali s razli\u010ditim<br \/>\nprimjerima koda. Potpuno je redizajnirana podsustav za generaciju koda u re2c, \u0161to<br \/>\nbi trebalo olak\u0161ati podr\u0161ku za nove jezike u budu\u0107nosti.<\/p>\n<\/li>\n<li>\n<noindex><\/p>\n<p>Dodana je alternativna CMake sustav gradnje (hvala <a rel=\"nofollow\" href=\"https:\/\/github.com\/ligfx\">ligfx<\/a>!).<\/noindex><br \/>\nPoku\u0161aji prevo\u0111enja re2c na CMake poduzimani su ve\u0107 neko vrijeme, ali prije ligfx nitko nije<br \/>\nponudio cjelovito rje\u0161enje.<br \/>\nStari sustav gradnje na Autotools i dalje se podr\u017eava i koristi,<br \/>\na u bliskoj budu\u0107nosti nema planova za njegovu eliminaciju (djelomi\u010dno kako ne bi stvorili<br \/>\nprobleme programerima distribucija, a djelomi\u010dno i zato \u0161to je stari sustav gradnje<br \/>\nstabilniji i sa\u017eetiji od novog).<br \/>\nOba sustava kontinuirano se testiraju pomo\u0107u Travis CI.<\/p>\n<\/li>\n<li>\n<p>Dodana je mogu\u0107nost definiranja su\u010deljnog koda u konfiguracijama pri kori\u0161tenju<br \/>\ngeneri\u010dkog API-ja (generic API). Ranije se ve\u0107ina API-ja morala definirati u obliku<br \/>\nfunkcija ili funkcionalnih makronaredbi. Sada se mogu definirati u obliku proizvoljnih<br \/>\nnizova s imenovanim \u0161ablonskim parametrima kao \u0161to je @@{name} ili samo @@ (ako<br \/>\nparametar je jedan i ne nastaje dvosmislenost). Stil API-ja definira se konfiguracijom<br \/>\nre2c:api:style (vrijednost functions postavlja funkcionalni stil, a free-form &ndash; slobodni oblik).<\/p>\n<\/li>\n<li>\n<p>Pobolj\u0161an rad opcije -c, &#8212;start-conditions, koja omogu\u0107uje kombiniranje vi\u0161e<br \/>\npovezanih leksikografa u jednom re2c-bloku. Sada se mogu koristiti<br \/>\nobi\u010dni blokovi zajedno s uvjetnim blokovima i definirati nekoliko nepovezanih uvjetnih<br \/>\nblokova u jednom datoteci.<br \/>\nPobolj\u0161an rad opcije -r, &#8212;reuse (ponovno kori\u0161tenje koda iz jednog bloka<br \/>\nu drugim blokovima) u kombinaciji s opcijama -c, &#8212;start-conditions i -f, &#8212;storable-state<br \/>\n(leksikograf s o\u010duvanim stanjem, koji se mo\u017ee prekinuti u proizvoljnom mjestu<br \/>\ni nastaviti s izvr\u0161enjem kasnije).<\/p>\n<\/li>\n<li>\n<p>Ispravljena je gre\u0161ka u nedavno dodanom algoritmu za obradu kraja ulaznih podataka<br \/>\n(EOF pravilo), koja je u rijetkim slu\u010dajevima dovela do neto\u010dnog obrade<br \/>\npreklapaju\u0107ih pravila.<\/p>\n<\/li>\n<li>\n<p>P pojednostavljen je proces bootstrapinga. Ranije je sustav gradnje poku\u0161avao dinami\u010dki prona\u0107i ve\u0107<br \/>\nsagra\u0111eni re2c koji bi se mogao koristiti za ponovno gra\u0111enje samog sebe.<br \/>\nTo je dovelo do pogre\u0161nih zavisnosti (budu\u0107i da je graf zavisnosti bio<br \/>\ndinami\u010dan, \u0161to ve\u0107ina sistema gradnje ne voli).<br \/>\nSada da bismo ponovo izgradili leksere, potrebno je eksplicitno<br \/>\nkonfigurisati sistem gradnje i postaviti promenljivu RE2C_FOR_BUILD.<\/p>\n<\/li>\n<\/ul>\n<p>Hvala svima koji su u\u010destvovali u pripremi ovog izdanja!<\/p>\n<p>Izvor: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"http:\/\/www.linux.org.ru\/news\/development\/15820642\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u043e\u043d\u0435\u0434\u0435\u043b\u044c\u043d\u0438\u043a 20 \u0438\u044e\u043b\u044f \u0432\u044b\u0448\u0435\u043b \u0440\u0435\u043b\u0438\u0437 re2c &ndash; \u0433\u0435\u043d\u0435\u0440\u0430\u0442\u043e\u0440\u0430 \u0431\u044b\u0441\u0442\u0440\u044b\u0445 \u043b\u0435\u043a\u0441\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0430\u043d\u0430\u043b\u0438\u0437\u0430\u0442\u043e\u0440\u043e\u0432. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u044f\u0437\u044b\u043a\u0430 Go (\u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0438\u043b\u0438 \u043e\u043f\u0446\u0438\u0435\u0439 &#8212;lang go \u0434\u043b\u044f re2c, \u0438\u043b\u0438 \u0432 \u0432\u0438\u0434\u0435 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u043e\u0439 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b re2go). \u0414\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u044f \u0434\u043b\u044f C \u0438 Go \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0438\u0437 \u043e\u0434\u043d\u043e\u0433\u043e \u0438 \u0442\u043e\u0433\u043e \u0436\u0435 \u0442\u0435\u043a\u0441\u0442\u0430, \u043d\u043e \u0441 \u0440\u0430\u0437\u043d\u044b\u043c\u0438 \u043f\u0440\u0438\u043c\u0435\u0440\u0430\u043c\u0438 \u043a\u043e\u0434\u0430. \u041f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u043f\u0435\u0440\u0435\u0440\u0430\u0431\u043e\u0442\u0430\u043d\u0430 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0430 \u043a\u043e\u0434\u043e\u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u0438 \u0432 re2c, \u0447\u0442\u043e [&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-89487","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043f\u043e\u043d\u0435\u0434\u0435\u043b\u044c\u043d\u0438\u043a 20 \u0438\u044e\u043b\u044f \u0432\u044b\u0448\u0435\u043b \u0440\u0435\u043b\u0438\u0437 re2c \u2013 \u0433\u0435\u043d\u0435\u0440\u0430\u0442\u043e\u0440\u0430 \u0431\u044b\u0441\u0442\u0440\u044b\u0445 \u043b\u0435\u043a\u0441\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0430\u043d\u0430\u043b\u0438\u0437\u0430\u0442\u043e\u0440\u043e\u0432.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" 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