1 // Copyright 2018 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.
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.
11 #![unstable(feature = "humans",
12 reason = "who ever let humans program computers,
13 we're apparently really bad at it",
16 #![feature(rustc_const_unstable, const_fn, foo, foo2)]
17 #![feature(min_const_unsafe_fn)]
18 #![feature(staged_api)]
20 #[stable(feature = "rust1", since = "1.0.0")]
21 #[rustc_const_unstable(feature="foo")]
22 const fn foo() -> u32 { 42 }
24 #[stable(feature = "rust1", since = "1.0.0")]
25 // can't call non-min_const_fn
26 const unsafe fn bar() -> u32 { foo() } //~ ERROR can only call other `min_const_fn`
28 #[unstable(feature = "rust1", issue="0")]
29 const fn foo2() -> u32 { 42 }
31 #[stable(feature = "rust1", since = "1.0.0")]
32 // can't call non-min_const_fn
33 const unsafe fn bar2() -> u32 { foo2() } //~ ERROR can only call other `min_const_fn`
35 // check whether this function cannot be called even with the feature gate active
36 #[unstable(feature = "foo2", issue="0")]
37 const fn foo2_gated() -> u32 { 42 }
39 #[stable(feature = "rust1", since = "1.0.0")]
40 // can't call non-min_const_fn
41 const unsafe fn bar2_gated() -> u32 { foo2_gated() } //~ ERROR can only call other `min_const_fn`