src/test/ui/consts/const-pattern-not-const-evaluable.rs

   1 // Copyright 2015 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 // compile-pass
  12
  13 #[derive(PartialEq, Eq)]
  14 enum Cake {
  15     BlackForest,
  16     Marmor,
  17 }
  18 use Cake::*;
  19
  20 struct Pair<A, B>(A, B);
  21
  22 const BOO: Pair<Cake, Cake> = Pair(Marmor, BlackForest);
  23 const FOO: Cake = BOO.1;
  24
  25 const fn foo() -> Cake {
  26     Marmor
  27 }
  28
  29 const WORKS: Cake = Marmor;
  30
  31 const GOO: Cake = foo();
  32
  33 fn main() {
  34     match BlackForest {
  35         FOO => println!("hi"),
  36         GOO => println!("meh"),
  37         WORKS => println!("möp"),
  38         _ => println!("bye"),
  39     }
  40 }