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  • positive.js

  • §

    This is a simple demonstration of the positive ‘look-behind’ operator. The grammar defines a line of any ASCII printing characters, but the line must end with the word end.

    (function positive() {
  let input = 'this line must end';
  const grammar = new (require('./positive-grammar'))();
  const setup = require('./setup');
  setup(input, grammar, 'positive-ok');
  input = 'this line does not end correctly';
  setup(input, grammar, 'positive-fail');
})();