src/test/run-pass/exhaustive-bool-match-sanity.rs

   1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Issue #33540
  12 // We previously used to generate a 3-armed boolean `SwitchInt` in the
  13 // MIR of the function `foo` below. #33583 changed rustc to
  14 // generate an `If` terminator instead. This test is to just ensure
  15 // sanity in that we generate an if-else chain giving the correct
  16 // results.
  17
  18 fn foo(x: bool, y: bool) -> u32 {
  19     match (x, y) {
  20         (false, _) => 0,
  21         (_, false) => 1,
  22         (true, true) => 2
  23     }
  24 }
  25
  26 fn main() {
  27     assert_eq!(foo(false, true), 0);
  28     assert_eq!(foo(false, false), 0);
  29     assert_eq!(foo(true, false), 1);
  30     assert_eq!(foo(true, true), 2);
  31 }