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

<\/p>\n

Teisip\u00e4eval, 19. novembril esitleti v\u00e4ljalaset re2c<\/a> – leksika-analyzerite genereerimise t\u00f6\u00f6riist (nn regulaarsete avalduste kompilaator, mis t\u00f5lgib koodi sihtprogrammeerimiskeelde). re2c on spetsialiseerunud kiirete ja kergesti integreeritavate leksikute genereerimisele. See erineb tuntumast analoogist flex paindliku liidese, optimeeritud tabeliteta leksikute genereerimise ja alamsobitamise (submatch extraction) toe poolest, mis p\u00f5hinevad m\u00e4\u00e4ratud l\u00f5ppautomaatidel koos siltidega (TDFA<\/a>). re2c-d kasutatakse projektides, kus on oluline leksikoni t\u00f6\u00f6kiirus, n\u00e4iteks Ninja ja PHP.<\/p>\n

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

Versioonis 4.0 on t\u00e4ielikult \u00fcmber tehtud koodigeneerimise alams\u00fcsteem, mis v\u00f5imaldas lisada toe kaheksale uuele keelele (D, Haskell, Java, JavaScript, OCaml, Python, V, Zig) lisaks juba toetatavatele (C\/C++, Go, Rust) ning ka \u00fcldise mehhanismi uute keelte lisamiseks konfigureerimisfailide kaudu. Koodigeneerija vastutab juba koostatud ja optimeeritud l\u00f5ppautomaatide t\u00f5lkimise eest koodiks, see t\u00e4hendab, et tema \u00fclesanne on valida sihtkeele jaoks sobivad juhtimisseosed, andmet\u00fc\u00fcbid, programmi \u00fcldmudel jne. Varasemalt oli kogu see loogika osa re2c l\u00e4htekoodist ning selle muutmiseks v\u00f5i uue keele lisamiseks tuli l\u00e4htekood uuesti seadistada ja re2c kokku ehitada. Sellised plaastrid ei olnud peamisse hoidlasse aktsepteeritud ilma standardsete n\u00e4idiste ja testide rakendamiseta, mis keerulisemaks muudab kogu protsessi. N\u00fc\u00fcd on kogu see loogika viidud s\u00fcntaksifailidesse<\/a> – tekstifailidesse, mille kasutaja v\u00f5ib esitada (vaikimisi kasutab re2c standardseid). re2c l\u00e4htekood on t\u00e4ielikult vabastatud konkreetse keele detailidest ning toetub ainult s\u00fcntaksifailile. Kasutaja v\u00f5ib osaliselt \u00fcle kirjutada olemasoleva s\u00fcntaksifaili v\u00f5i kirjutada uue nullist. K\u00f5igi ametlikult toetatud keelte jaoks on t\u00e4ielik dokumentatsioon n\u00e4idetega<\/a>.<\/p>\n

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

Muide, s\u00fcntaksifailide idee tekkis t\u00e4nu \u00fchele kommentaarile LOR-is<\/a>, mille eest ait\u00e4h \"re2cthe_coder<\/a>.<\/p>\n

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

V\u00e4ljalaskesse on lisatud palju muid muudatusi, et lihtsustada kasutajaliidest, parandada t\u00f6\u00f6tlust k\u00f5nelemisgruppide (capturing groups) osas, samuti on lisatud veebi keskkond n\u00e4idete redigeerimiseks ja kompileerimiseks: http:\/\/re2c.org\/playground<\/a>.<\/p>\n

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

Allikas: 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":"Teisip\u00e4eval, 19. novembril esitleme re2c - 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