{"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\/pl\/blog\/news\/re2c-2-0","title":{"rendered":"re2c 2.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>W poniedzia\u0142ek 20 lipca wydano wersj\u0119 re2c \u2013 generatora szybkich analizator\u00f3w leksykalnych.<br \/>\nG\u0142\u00f3wne zmiany:<\/p>\n<ul>\n<li>\n<p>Dodano wsparcie dla j\u0119zyka Go<br \/>\n(w\u0142\u0105czane jako opcja &#8212;lang go dla re2c lub jako osobny program re2go).<br \/>\nDokumentacja dla C i Go jest generowana z tego samego tekstu, ale z r\u00f3\u017cnymi<br \/>\nprzyk\u0142adami kodu. Ca\u0142kowicie przebudowano podsystem generowania kodu w re2c, co<br \/>\npowinno u\u0142atwi\u0107 wsparcie dla nowych j\u0119zyk\u00f3w w przysz\u0142o\u015bci.<\/p>\n<\/li>\n<li>\n<noindex><\/p>\n<p>Dodano alternatywny system budowy oparty na CMake (dzi\u0119kujemy <a rel=\"nofollow\" href=\"https:\/\/github.com\/ligfx\">ligfx<\/a>!).<\/noindex><br \/>\nPr\u00f3by przet\u0142umaczenia re2c na CMake podejmowane by\u0142y ju\u017c od dawna, jednak do ligfx nikt nie<br \/>\nzaprezentowa\u0142 pe\u0142noprawnego rozwi\u0105zania.<br \/>\nStary system budowy oparty na Autotools nadal jest wspierany i u\u017cywany,<br \/>\na w najbli\u017cszej przysz\u0142o\u015bci nie ma plan\u00f3w, aby z niego zrezygnowa\u0107 (cz\u0119\u015bciowo aby nie tworzy\u0107<br \/>\nproblem\u00f3w dla tw\u00f3rc\u00f3w dystrybucji, cz\u0119\u015bciowo dlatego, \u017ce stary system budowy<br \/>\njest stabilniejszy i bardziej zwi\u0119z\u0142y ni\u017c nowy).<br \/>\nOba systemy s\u0105 na r\u00f3wni ci\u0105gle testowane za pomoc\u0105 Travis CI.<\/p>\n<\/li>\n<li>\n<p>Dodano mo\u017cliwo\u015b\u0107 definiowania kodu interfejsu w konfiguracjach przy u\u017cyciu<br \/>\nog\u00f3lnego API (generic API). Wcze\u015bniej wi\u0119kszo\u015b\u0107 API musia\u0142a by\u0107 definiowana w formie<br \/>\nfunkcji lub funkcjonalnych makr. Teraz mo\u017cna je definiowa\u0107 w formie dowolnych<br \/>\n\u0142a\u0144cuch\u00f3w z nazwanymi parametrami szablon\u00f3w w postaci @@{name} lub po prostu @@ (je\u015bli<br \/>\nparametr jest jeden i nie powstaje niejednoznaczno\u015b\u0107). Styl API definiuje si\u0119 w konfiguracji<br \/>\nre2c:api:style (warto\u015b\u0107 functions okre\u015bla styl funkcjonalny, a free-form \u2013 dowolny).<\/p>\n<\/li>\n<li>\n<p>Poprawiono dzia\u0142anie opcji -c, &#8212;start-conditions, pozwalaj\u0105cej na \u0142\u0105czenie wielu<br \/>\npowi\u0105zanych leksyk\u00f3w w jednym bloku re2c. Teraz mo\u017cna u\u017cywa\u0107<br \/>\nzwyk\u0142ych blok\u00f3w razem z warunkowymi i definiowa\u0107 kilka niepowi\u0105zanych warunkowych<br \/>\nblok\u00f3w w jednym pliku.<br \/>\nPoprawiono dzia\u0142anie opcji -r, &#8212;reuse (ponowne wykorzystanie kodu z jednego bloku<br \/>\nw innych blokach) w po\u0142\u0105czeniu z opcjami -c, &#8212;start-conditions i -f, &#8212;storable-state.<br \/>\n(leksyk z zapisywanym stanem, kt\u00f3ry mo\u017cna przerwa\u0107 w dowolnym miejscu<br \/>\ni kontynuowa\u0107 wykonanie p\u00f3\u017aniej).<\/p>\n<\/li>\n<li>\n<p>Poprawiono b\u0142\u0105d w niedawno dodanym algorytmie przetwarzania ko\u0144ca danych wej\u015bciowych<br \/>\n(regu\u0142a EOF), kt\u00f3ry w rzadkich przypadkach prowadzi\u0142 do niew\u0142a\u015bciwego przetwarzania<br \/>\nnak\u0142adaj\u0105cych si\u0119 regu\u0142.<\/p>\n<\/li>\n<li>\n<p>Uproszczono proces bootstrappingu. Wcze\u015bniej system budowy pr\u00f3bowa\u0142 dynamicznie znale\u017a\u0107 ju\u017c<br \/>\nskompilowany re2c, kt\u00f3ry mo\u017cna by wykorzysta\u0107 do ponownej kompilacji samego siebie.<br \/>\nTo prowadzi\u0142o do nieprawid\u0142owych zale\u017cno\u015bci (poniewa\u017c graf zale\u017cno\u015bci stawa\u0142 si\u0119<br \/>\ndynamiczny, co wi\u0119kszo\u015b\u0107 system\u00f3w budowy nie lubi).<br \/>\nTeraz, aby ponownie skompilowa\u0107 leksery, nale\u017cy w spos\u00f3b jawny<br \/>\nskonfigurowa\u0107 system budowy i ustawi\u0107 zmienn\u0105 RE2C_FOR_BUILD.<\/p>\n<\/li>\n<\/ul>\n<p>Dzi\u0119kujemy wszystkim, kt\u00f3rzy wzi\u0119li udzia\u0142 w przygotowaniu tej wersji!<\/p>\n<p>\u0179r\u00f3d\u0142o: <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 5.0.1.1 - 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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