src/test/mir-opt/nll/region-subtyping-basic.rs

   1 // Basic test for liveness constraints: the region (`R1`) that appears
   2 // in the type of `p` includes the points after `&v[0]` up to (but not
   3 // including) the call to `use_x`. The `else` branch is not included.
   4
   5 // compile-flags:-Zborrowck=mir -Zverbose
   6 //                              ^^^^^^^^^ force compiler to dump more region information
   7
   8 #![allow(warnings)]
   9
  10 fn use_x(_: usize) -> bool { true }
  11
  12 // EMIT_MIR_FOR_EACH_BIT_WIDTH
  13 // EMIT_MIR rustc.main.nll.0.mir
  14 fn main() {
  15     let mut v = [1, 2, 3];
  16     let p = &v[0];
  17     let q = p;
  18     if true {
  19         use_x(*q);
  20     } else {
  21         use_x(22);
  22     }
  23 }