gistfile1.txt

%lex                                                                                                                                                                                     
                                                                                                                                                                                         
%%                                                                                                                                                                                       
                                                                                                                                                                                         
\n+        { process.stdout.write('[ENDLINE(S)]\n'); return 'ENDLINE'; }                                                                                                                 
<<EOF>>    { process.stdout.write('[EOF]'); return 'EOF'; }                                                                                                                              
                                                                                                                                                                                         
(.*?)":"   { process.stdout.write('[KEY]'); return 'KEY'; }                                                                                                                              
\s         { process.stdout.write('[SPACE]'); return 'SPACE'; }                                                                                                                          
[^\Z|\n]+  { process.stdout.write('[VALUE]'); return 'VALUE'; }                                                                                                                          
                                                                                                                                                                                         
/lex                                                                                                                                                                                     
                                                                                                                                                                                         
%%                                                                                                                                                                                       
                                                                                                                                                                                         
start                                                                                                                                                                                    
  : KEY SPACE VALUE ENDLINE                                                                                                                                                              
  | VALUE ENDLINE                                                                                                                                                                        
  | KEY SPACE VALUE EOF                                                                                                                                                                  
  ;