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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![feature(const_fn)]
#[derive(PartialEq, Eq)]
enum Cake {
BlackForest,
Marmor,
}
use Cake::*;
struct Pair<A, B>(A, B);
const BOO: Pair<Cake, Cake> = Pair(Marmor, BlackForest);
//~^ ERROR: constant evaluation error [E0080]
//~| unimplemented constant expression: tuple struct constructors
const FOO: Cake = BOO.1;
const fn foo() -> Cake {
Marmor
}
const WORKS: Cake = Marmor;
const GOO: Cake = foo();
fn main() {
match BlackForest {
FOO => println!("hi"), //~ NOTE: for pattern here
GOO => println!("meh"),
WORKS => println!("möp"),
_ => println!("bye"),
}
}
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