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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. %%
  6. "int"       { printf("INT_KEYWORD\n"); }
  7. [a-zA-Z]+   { printf("IDENTIFIER\n"); }
  8. "5"         { printf("NUMBER\n"); }
  9. "@"         { printf("SPECIAL\n"); }
  10. "="         { printf("OPERATOR\n"); }
  11. [ \t\n]     ;  /* Ignore whitespace */
  12. .           { printf("UNKNOWN\n"); }
  13. %%
  14.  
  15. int main() {
  16.     yylex();
  17.     return 0;
  18. }
Success #stdin #stdout #stderr 0.02s 6920KB
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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/RTASCF/prog:2:1: Syntax error: Operator expected
ERROR: /home/RTASCF/prog:18:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/kPg2sw
language:
Prolog (swi 7.6.4)
created:
11 days ago
visibility:
public

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