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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. /* ----- RÈGLES ----- */
  6. %%
  7. "if"        { printf("KW_IF\n"); }
  8. "else"      { printf("KW_ELSE\n"); }
  9. "while"     { printf("KW_WHILE\n"); }
  10.  
  11. /* Operateurs de comparaison */
  12. "=="        { printf("EQ\n"); }
  13. "!="        { printf("NEQ\n"); }
  14. "<="        { printf("LE\n"); }
  15. ">="        { printf("GE\n"); }
  16. "<"         { printf("LT\n"); }
  17. ">"         { printf("GT\n"); }
  18.  
  19. /* Operateurs arithmétiques */
  20. "="         { printf("ASSIGN\n"); }
  21. "+"         { printf("PLUS\n"); }
  22. "-"         { printf("MINUS\n"); }
  23. "*"         { printf("MULT\n"); }
  24. "/"         { printf("DIV\n"); }
  25.  
  26. /* Délimiteurs */
  27. "("         { printf("LPAREN\n"); }
  28. ")"         { printf("RPAREN\n"); }
  29. "{"         { printf("LBRACE\n"); }
  30. "}"         { printf("RBRACE\n"); }
  31.  
  32. /* Identifiant */
  33. [a-zA-Z_][a-zA-Z0-9_]* { printf("IDENT(%s)\n", yytext); }
  34.  
  35. /* Nombre entier */
  36. [0-9]+      { printf("INT(%s)\n", yytext); }
  37.  
  38. /* Commentaires */
  39. "//"[^\n]*  ;
  40.  
  41. /* Espaces : ignorés */
  42. [ \t\n]+    ;
  43.  
  44. /* Tout le reste = erreur */
  45. .           { printf("ERROR(%s)\n", yytext); }
  46. %%
  47. int main() {
  48.     yylex();
  49.     return 0;
  50. }
  51.  
Success #stdin #stdout #stderr 0.03s 6916KB
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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/m8EZUW/prog:2:1: Syntax error: Operator expected
ERROR: /home/m8EZUW/prog:50:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/NSHgcu
language:
Prolog (swi 7.6.4)
created:
1 hour ago
visibility:
public

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