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  1. %{
  2. #include "y.tab.h"
  3. %}
  4.  
  5. %%
  6. "int"       { return INT; }
  7. "while"     { return WHILE; }
  8. "for"       { return FOR; }
  9. "print"     { return PRINT; }
  10. "def"       { return DEF; }
  11. "return"    { return RETURN; }
  12. [a-zA-Z_][a-zA-Z0-9_]* { yylval.str = strdup(yytext); return IDENTIFIER; }
  13. [0-9]+      { yylval.num = atoi(yytext); return NUMBER; }
  14. "{"         { return LBRACE; }
  15. "}"         { return RBRACE; }
  16. "("         { return LPAREN; }
  17. ")"         { return RPAREN; }
  18. ";"         { return SEMICOLON; }
  19. "+" | "-" | "*" | "/" { return OPERATOR; }
  20. [ \t\n]+    { /* Ignore whitespace */ }
  21. .           { return yytext[0]; }
  22. %%
  23.  
Success #stdin #stdout #stderr 0.02s 7012KB
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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/oszuc5/prog:2:1: Syntax error: Operator expected
ERROR: /home/oszuc5/prog:22:2: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/8yJdsZ
language:
Prolog (swi 7.6.4)
created:
2 days ago
visibility:
public

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