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  1. %{
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4. %}
  5.  
  6. %%
  7. // --- Regular Expressions (token definitions) ---
  8. int             [a-zA-Z_][a-zA-Z0-9_]*
  9. float           [0-9]+\.[0-9]+
  10. digit           [0-9]+
  11. keyword         int|float|if|else|for|while|return
  12.  
  13. // --- 
  14. [ERROR] AxiosError: {
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  16.     "message": "You didn't provide an API key. You need to provide your API key in an Authorization header using Bearer auth (i.e. Authorization: Bearer YOUR_KEY), or as the password field (with blank username) if you're accessing the API from your browser and are prompted for a username and password. You can obtain an API key from https://p...content-available-to-author-only...i.com/account/api-keys.",
  17.     "type": "invalid_request_error",
  18.     "param": null,
  19.     "code": null
  20.   }
  21. }
  22. 401
  23. {
  24.   "date": "Tue, 12 Aug 2025 06:24:16 GMT",
  25.   "content-type": "application/json; charset=utf-8",
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  41. }
  42.  
  43. Request failed with status code 401Token Rules and Actions ---
  44. {keyword}       { printf("Token: %s | Type: KEYWORD\n", yytext); }
  45. {float}         { printf("Token: %s | Type: CONSTANT (FLOAT)\n", yytext); }
  46. {digit}         { printf("Token: %s | Type: CONSTANT (INT)\n", yytext); }
  47. {int}           { printf("Token: %s | Type: IDENTIFIER\n", yytext); }
  48. "+"|"-"|"*"|"/" { printf("Token: %s | Type: OPERATOR\n", yytext); }
  49. "(" | ")" | ";" | "," { printf("Token: %s | Type: PUNCTUATION\n", yytext); }
  50. [ \t\n\r]+      { /* Ignore whitespace */ }
  51. .               { printf("Token: %s | Type: UNKNOWN\n", yytext); }
  52.  
  53. %%
  54.  
  55. // --- Main Function ---
  56. int main(int argc, char** argv) {
  57.     yylex();  // Start lexical analysis
  58.     return 0;
  59. }
Success #stdin #stdout #stderr 0.02s 6984KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
ERROR: /home/3GIjNY/prog:2:1: Syntax error: Operator expected
ERROR: /home/3GIjNY/prog:59:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/ePbXB8
language:
Prolog (swi 7.6.4)
created:
5 hours ago
visibility:
public

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