/src/test/compile-fail/lambda-mutate-nested.rs

https://bitbucket.org/graydon/rust · Rust · 15 lines · 11 code · 1 blank · 3 comment · 0 complexity · 5f6dfb9a7800483dccde262f26d3cdb8 MD5 · raw file 

    

  1. // error-pattern:assigning to captured outer immutable variable in a stack closure
    2. 

  2. // Make sure that nesting a block within a fn@ doesn't let us
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  3. // mutate upvars from a fn@.
    4. 

  4. fn f2(x: fn()) { x(); }
    5. 

  5. 

  6. fn main() {
    7. 

  7.     let i = 0;
    8. 

  8.     let ctr = fn@ () -> int { f2(|| i = i + 1 ); return i; };
    9. 

  9.     log(error, ctr());
    10. 

  10.     log(error, ctr());
    11. 

  11.     log(error, ctr());
    12. 

  12.     log(error, ctr());
    13. 

  13.     log(error, ctr());
    14. 

  14.     log(error, i);
    15. 

  15. }
    16.