{"id":34906,"date":"2019-10-31T22:01:11","date_gmt":"2019-10-31T19:01:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/yacc-pre-bison-parser-v-bash-skript-realizatsiya-jq-na-bash\/"},"modified":"2019-10-31T22:01:11","modified_gmt":"2019-10-31T19:01:11","slug":"yacc-pre-bison-parser-v-bash-skript-realizatsiya-jq-na-bash","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/yacc-pre-bison-parser-v-bash-skript-realizatsiya-jq-na-bash","title":{"rendered":"yacc (pre-bison) Parser in bash-Skript. Umsetzung von jq in bash.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Manchmal steht man vor der Herausforderung, ein kleines intelligentes Skript zu schreiben, das eine Art eingebettete Grammatik versteht, also mit einer Mini-Sprache im Hintergrund. Zun\u00e4chst habe ich eine minimalistische Implementierung von jq in Bash geschrieben. Doch je mehr \u201eIntelligenz\u201c ich hinzuf\u00fcgte, desto schwieriger wurde die Implementierung der rekursiven Auswertung von Teilausdr\u00fccken. Das wurde so frustrierend, dass ich zun\u00e4chst einen LARL(1)-Compiler mit yacc (pre-bison) entwickelte, um Bash-Skripte zu generieren. Daraufhin entstand nahezu nahtlos ein guter Testcode f\u00fcr yacc_bash.c, der dem originalen jq in Bash sehr \u00e4hnlich ist.<\/p>\n

Artikel vollst\u00e4ndig: <\/p>\n

Quelle: linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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Es wurde so frustrierend, dass ich anfing, zun\u00e4chst einen LARL(1) yacc (pre-bison) Compiler zu schreiben, um Bash-Skripte zu generieren, und anschlie\u00dfend wie","canonical_url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/yacc-pre-bison-parser-v-bash-skript-realizatsiya-jq-na-bash","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"de_DE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47yacc (pre-bison) \u043f\u0430\u0440\u0441\u0435\u0440 \u0432 bash-\u0441\u043a\u0440\u0438\u043f\u0442. \u0420\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f jq \u043d\u0430 bash | 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