{"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\/hr\/blog\/news\/re2c-4-0","title":{"rendered":"re2c 4.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

<\/p>\n

U utorak, 19. studenog, predstavljena je verzija re2c<\/a> – generatora leksi\u010dkih analizatora (tako\u0111er poznatog kao kompajler regularnih izraza u kod na ciljanom programskom jeziku). re2c se specijalizira za generiranje brzih i lako ugra\u0111ivih leksika. Razlikuje se od poznatijeg pandana flex fleksibilnim su\u010deljem, generiranjem optimiziranih netabli\u010dnih leksika i podr\u0161kom za ekstrakciju podudarnosti (submatch extraction) temeljenom na deterministi\u010dkim kona\u010dnim automatima s oznakama (TDFA<\/a>). re2c se koristi u projektima gdje je brzina rada leksika va\u017ena, primjerice u Ninja i u PHP-u.<\/p>\n

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

U verziji 4.0 potpuno je revidiran sustav generiranja koda, \u0161to je omogu\u0107ilo dodavanje podr\u0161ke za osam novih jezika (D, Haskell, Java, JavaScript, OCaml, Python, V, Zig) osim postoje\u0107ih (C\/C++, Go, Rust), kao i zajedni\u010dki mehanizam za dodavanje novih jezika putem konfiguracijskih datoteka. Generator koda odgovara za pretvorbu ve\u0107 izgra\u0111enog i optimiziranog kona\u010dnog automata u kod, odnosno njegov je zadatak – odabrati prikladne upravlja\u010dke strukture, tipove podataka, op\u0107i model programa itd. Ranije je cijela ta logika bila dio izvornog koda re2c, a da bi je se izmijenilo ili dodao novi jezik, bilo je potrebno patchati izvorni kod i ponovno izgraditi re2c. Takvi patch-evi nisu se prihva\u0107ali u glavnom repozitoriju bez provo\u0111enja standardnog skupa primjera i testova, \u0161to je dodatno ote\u017eavalo cijeli proces. Sada je cijela ta logika premje\u0161tena u sintakti\u010dke datoteke<\/a> – tekstualne konfiguracijske datoteke koje korisnik mo\u017ee pru\u017eiti (po defaultu re2c koristi standardne). Izvorni kod re2c je potpuno oslobo\u0111en detalja konkretnih jezika i oslanja se samo na sintakti\u010dku datoteku. Korisnik mo\u017ee djelomi\u010dno prebrisati postoje\u0107u sintakti\u010dku datoteku ili napisati novu od nule. Za sve slu\u017ebeno podr\u017eavane jezike postoje potpuna dokumentacija s primjerima<\/a>.<\/p>\n

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

Usput, sama ideja sintakti\u010dkih datoteka proiza\u0161la je iz jednog komentara na LOR-u<\/a>, na \u010demu se zahvaljujemo \"re2cthe_coder<\/a>.<\/p>\n

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

U verziju su uklju\u010dene mnoge druge promjene za pojednostavljenje korisni\u010dkog su\u010delja, pobolj\u0161anje rada s grupama podudaranja (capturing groups), kao i dodana je online okru\u017eenje za ure\u0111ivanje i kompajliranje primjera: http:\/\/re2c.org\/playground<\/a>.<\/p>\n

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

Izvor: 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\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":"U utorak, 19. studenog, predstavljeno je izdanje re2c \u2013 generatora leksi\u010dkih analizatora (tako\u0111er kompilator regularnih izraza u kod na 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