File: sample.rex

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#
# sample.rex
# lexical definition sample for rex
#

class Sample
macro
  BLANK         /[\ \t]+/
rule
  /{{BLANK}}/   # no action
  /\d+/         { [:digit, text.to_i] }
  /\w+/         { [:word, text] }
  /\n/
  /./           { [text, text] }
end