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grammar-info.md

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Directive Grammar

This page provides more information on the constructs and grammar of dataprep.

Recipe

#pragma version 1.0
#pragma load-directives test-reverse,test-window
parse-as-csv :body ',' true;
send-to-error exp:{ total < 10};
!test :body prop:{ a='b', c='d', e=f, e=1.0};

AST

AST

Building in IDE

Intellij

  • Install Plugin - Antlr v4 grammar plugin - version 1.8.4 or higher. Configure Antlr Plugin
  • Output Directory : ${base}/wrangler/wrangler-core/target/generated-sources/antlr4
  • Package : io.cdap.wrangler.parser
  • Auto generate upon save - ON
  • Generate Parse Tree Visitor - ON
  • Generate Parse Tree Listener - OFF