src/test/ui/lint/dead-code/lint-dead-code-2.rs

   1 #![allow(unused_variables)]
   2 #![deny(dead_code)]
   3 #![feature(main, start)]
   4
   5 struct Foo;
   6
   7 trait Bar {
   8     fn bar1(&self);
   9     fn bar2(&self) {
  10         self.bar1();
  11     }
  12 }
  13
  14 impl Bar for Foo {
  15     fn bar1(&self) {
  16         live_fn();
  17     }
  18 }
  19
  20 fn live_fn() {}
  21
  22 fn dead_fn() {} //~ ERROR: function is never used
  23
  24 #[main]
  25 fn dead_fn2() {} //~ ERROR: function is never used
  26
  27 fn used_fn() {}
  28
  29 #[start]
  30 fn start(_: isize, _: *const *const u8) -> isize {
  31     used_fn();
  32     let foo = Foo;
  33     foo.bar2();
  34     0
  35 }
  36
  37 // this is not main
  38 fn main() { //~ ERROR: function is never used
  39     dead_fn();
  40     dead_fn2();
  41 }