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  1. %{
  2.     #include<stdio.h>
  3. %}
  4.  
  5. %%
  6. [a-zA-Z_][a-zA-Z0-9_]* {printf("%s is a valid identifier.\n", yytext);}
  7. [^\n]+ {printf("%s is not a valid identifier.\n", yytext);}
  8. %%
  9.  
  10. int yywrap()
  11. {
  12.     return 1;
  13. }
  14.  
  15. int main()
  16. {
  17.     yylex();
  18.     return 0;
  19. }
Success #stdin #stdout #stderr 0.03s 6892KB
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stdout
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Standard output is empty
stderr
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ERROR: /home/10FGDv/prog:19:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/RaQjT4
language:
Prolog (swi 7.6.4)
created:
6 days ago
visibility:
public

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