src/test/ui/liveness/liveness-dead.rs

   1 #![allow(dead_code)]
   2 #![deny(unused_assignments)]
   3
   4 fn f1(x: &mut isize) {
   5     *x = 1; // no error
   6 }
   7
   8 fn f2() {
   9     let mut x: isize = 3; //~ ERROR: value assigned to `x` is never read
  10     x = 4;
  11     x.clone();
  12 }
  13
  14 fn f3() {
  15     let mut x: isize = 3;
  16     x.clone();
  17     x = 4; //~ ERROR: value assigned to `x` is never read
  18 }
  19
  20 fn f4(mut x: i32) { //~ ERROR: value passed to `x` is never read
  21     x = 4;
  22     x.clone();
  23 }
  24
  25 fn f5(mut x: i32) {
  26     x.clone();
  27     x = 4; //~ ERROR: value assigned to `x` is never read
  28 }
  29
  30 fn main() {}