src/librustc_error_codes/error_codes/E0580.md

   1 The `main` function was incorrectly declared.
   2
   3 Erroneous code example:
   4
   5 ```compile_fail,E0580
   6 fn main(x: i32) { // error: main function has wrong type
   7     println!("{}", x);
   8 }
   9 ```
  10
  11 The `main` function prototype should never take arguments.
  12 Example:
  13
  14 ```
  15 fn main() {
  16     // your code
  17 }
  18 ```
  19
  20 If you want to get command-line arguments, use `std::env::args`. To exit with a
  21 specified exit code, use `std::process::exit`.