dead_code

The compiler provides a dead_code
lint that will warn
about unused functions. An attribute can be used to disable the lint.

  1. fn used_function() {}
  3. // `#[allow(dead_code)]` is an attribute that disables the `dead_code` lint
  4. #[allow(dead_code)]
  5. fn unused_function() {}
  7. fn noisy_unused_function() {}
  8. // FIXME ^ Add an attribute to suppress the warning
  10. fn main() {
  11.     used_function();
  12. }

Note that in real programs, you should eliminate dead code. In these examples
we’ll allow dead code in some places because of the interactive nature of the
examples.