WBRASWELL / Parse-Eyapp-1.21 / t / cleanok / examples_eyapplanguageref__CsBetweenCommansAndDWithNames.eyp 
%semantic token 'c' 'd' 
%tree

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Start:
      S 
;
S:
      ( 'c' <%name Cs * ',' >'d' ) %name Cs_and_d * 
;

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