{"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\/da\/blog\/news\/re2c-2-0","title":{"rendered":"re2c 2.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Mandag den 20. juli blev re2c - generatoren til hurtige leksikalske analyserere - udgivet.<br \/>\nVigtige \u00e6ndringer:<\/p>\n<ul>\n<li>\n<p>Underst\u00f8ttelse af sprog Go er tilf\u00f8jet<br \/>\n(kan aktiveres enten med indstillingen &#8212;lang go for re2c, eller som et separat program re2go).<br \/>\nDokumentationen for C og Go genereres ud fra den samme tekst, men med forskellige<br \/>\nkodeeksempler. Helfornyede kodet generationssystemet i re2c, hvilket<br \/>\nb\u00f8r lette underst\u00f8ttelsen af nye sprog i fremtiden.<\/p>\n<\/li>\n<li>\n<noindex><\/p>\n<p>En alternativ byggesystem p\u00e5 CMake er tilf\u00f8jet (tak <a rel=\"nofollow\" href=\"https:\/\/github.com\/ligfx\">ligfx<\/a>!).<\/noindex><br \/>\nFors\u00f8g p\u00e5 at overs\u00e6tte re2c til CMake har v\u00e6ret gjort i lang tid, men f\u00f8r ligfx var der ingen,<br \/>\nder tilb\u00f8d en komplet l\u00f8sning.<br \/>\nDet gamle byggesystem p\u00e5 Autotools forts\u00e6tter med at blive underst\u00f8ttet og anvendt,<br \/>\nog der er ingen planer om at skifte fra det i den n\u00e6rmeste fremtid (delvist for at undg\u00e5<br \/>\nproblemer for distributionsudviklerne, delvist fordi det gamle byggesystem<br \/>\ner mere stabilt og kortfattet end det nye).<br \/>\nBegge systemer testes kontinuerligt med Travis CI.<\/p>\n<\/li>\n<li>\n<p>Muligheden for at angive gr\u00e6nsefladekode i konfigurationerne ved brug af<br \/>\ngenerisk API (generic API) er tilf\u00f8jet. Tidligere skulle st\u00f8rstedelen af API\u2019erne angives som<br \/>\nfunktioner eller funktionelle makroer. Nu kan de angives som vilk\u00e5rlige<br \/>\nstrenge med navngivne skabelonparametre af typen @@{name} eller blot @@ (hvis<br \/>\nder kun er \u00e9n parameter, og der ikke opst\u00e5r tvetydighed). API-stilen angives med konfigurationen<br \/>\nre2c:api:style (v\u00e6rdien functions angiver en funktionel stil, mens free-form &ndash; er fri form).<\/p>\n<\/li>\n<li>\n<p>Arbejdsgangen for indstillingen -c, &#8212;start-conditions er forbedret, hvilket muligg\u00f8r kombinationen af flere<br \/>\nrelaterede lexere i en re2c-blok, er blevet forbedret. Nu kan almindelige blokke bruges<br \/>\nsammen med betingede, og der kan angives flere ikke-relaterede betingede<br \/>\nblokke i \u00e9n fil.<br \/>\nArbejdsgangen for indstillingen -r, &#8212;reuse (genbrug af kode fra en blok<br \/>\ni andre blokke) er forbedret i kombination med indstillingerne -c, &#8212;start-conditions og -f, &#8212;storable-state<br \/>\n(lexer med gemt tilstand, som kan afbrydes p\u00e5 vilk\u00e5rligt sted<br \/>\nog forts\u00e6ttes senere).<\/p>\n<\/li>\n<li>\n<p>Der blev rettet en fejl i den nyligt tilf\u00f8jede algoritme til behandling af slutningen af inputdata<br \/>\n(EOF-regel), som i sj\u00e6ldne tilf\u00e6lde f\u00f8rte til forkert behandling af<br \/>\noverlappende regler.<\/p>\n<\/li>\n<li>\n<p>Bootstrapping-processen er blevet forenklet. Tidligere fors\u00f8gte byggesystemet dynamisk at finde den allerede<br \/>\nsamlede re2c, som kunne bruges til at rekonstruere sig selv.<br \/>\nDette f\u00f8rte til forkerte afh\u00e6ngigheder (da afh\u00e6ngighedsgrafen blev<br \/>\ndynamisk, hvilket de fleste byggesystemer ikke bryder sig om).<br \/>\nNu kr\u00e6ves det eksplicit at<br \/>\nkonfigurere byggesystemet og angive variablen RE2C_FOR_BUILD.<\/p>\n<\/li>\n<\/ul>\n<p>Tak til alle, der har deltaget i forberedelsen af denne udgivelse!<\/p>\n<p>Kilde: <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 5.0.3 - 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