/src/test/run-pass/string-self-append.rs

http://github.com/jruderman/rust · Rust · 16 lines · 14 code · 1 blank · 1 comment · 2 complexity · 5dc3814f5f5febbb90d18bb59fbdf120 MD5 · raw file 

    

  1. use std;
    2. 

  2. import str;
    3. 

  3. 

  4. fn main() {
    5. 

  5.     // Make sure we properly handle repeated self-appends.
    6. 

  6.     let mut a: ~str = ~"A";
    7. 

  7.     let mut i = 20;
    8. 

  8.     let mut expected_len = 1u;
    9. 

  9.     while i > 0 {
    10. 

  10.         log(error, str::len(a));
    11. 

  11.         assert (str::len(a) == expected_len);
    12. 

  12.         a += a;
    13. 

  13.         i -= 1;
    14. 

  14.         expected_len *= 2u;
    15. 

  15.     }
    16. 

  16. }
    17.