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  1.  
  2. %{
  3.         int line = 1; /* New variable for counting line number*/
  4.         int comment = 0;
  5.         int debug=1;  /* prints out debug statements if desired */
  6. %}
  7. %%
  8. "\n"    {line++;
  9.           if (!comment) printf("\n");}  /* New rule to ignore new lines when they're in comments*/
  10. "/*"	{
  11. 	if (comment && debug) fprintf(stderr,
  12. 		" >>>>>>>> line %d: Possible Nested comment <<<<<<<<<<\n", line); /*Added ", line" inside fprintf to match line to %d*/
  13. 	comment = 1;
  14. 	}
  15.  
  16. "*/"	{
  17.           if (!comment) printf("%s",yytext); /*print out if it is not in a comment */
  18.   	  comment = 0;
  19. 	}
  20. .       { if (!comment) printf("%s",yytext);}
  21.  
  22. %%
  23.  
  24. int yywrap(void)
  25. { return 1;
  26. }
  27.  
  28. int main()
  29. {
  30.   yylex();
  31.  
  32. }
  33.  
  34.  
Success #stdin #stdout #stderr 0.03s 6960KB
comments (?)
stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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ERROR: /home/NRS1sF/prog:3:12: Syntax error: Operator expected
ERROR: /home/NRS1sF/prog:33:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/vwdHHJ
language:
Prolog (swi 7.6.4)
created:
1 year ago
visibility:
public

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