src/test/run-pass/issue-38002.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 // Check that constant ADTs are translated OK, part k of N.
  12
  13 #![feature(slice_patterns)]
  14
  15 enum Bar {
  16     C
  17 }
  18
  19 enum Foo {
  20     A {},
  21     B {
  22         y: usize,
  23         z: Bar
  24     },
  25 }
  26
  27 const LIST: [(usize, Foo); 2] = [
  28     (51, Foo::B { y: 42, z: Bar::C }),
  29     (52, Foo::B { y: 45, z: Bar::C }),
  30 ];
  31
  32 pub fn main() {
  33     match LIST {
  34         [
  35             (51, Foo::B { y: 42, z: Bar::C }),
  36             (52, Foo::B { y: 45, z: Bar::C })
  37         ] => {}
  38         _ => {
  39             // I would want to print the enum here, but if
  40             // the discriminant is garbage this causes an
  41             // `unreachable` and silent process exit.
  42             panic!("trivial match failed")
  43         }
  44     }
  45 }