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WBRASWELL / Parse-Eyapp-1.21 / t / quotemeta.eyp 
%semantic token '+' '-' '*' '?'
%syntactic token '['  ']'
%token NUM = /\d+/

%%

s:   s '+' 
   | s '-'
   | s '*'
   | s '?'
   | s '[' ']'
   | NUM
;

%%