47 lines
1.3 KiB
Rust
47 lines
1.3 KiB
Rust
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Test use of min_const_fn without feature gate.
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const fn foo() -> usize { 0 } //~ ERROR const fn is unstable
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trait Foo {
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const fn foo() -> u32; //~ ERROR const fn is unstable
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//~| ERROR trait fns cannot be declared const
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const fn bar() -> u32 { 0 } //~ ERROR const fn is unstable
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//~| ERROR trait fns cannot be declared const
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}
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impl Foo {
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const fn baz() -> u32 { 0 } //~ ERROR const fn is unstable
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}
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impl Foo for u32 {
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const fn foo() -> u32 { 0 } //~ ERROR const fn is unstable
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//~| ERROR trait fns cannot be declared const
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}
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static FOO: usize = foo();
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const BAR: usize = foo();
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macro_rules! constant {
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($n:ident: $t:ty = $v:expr) => {
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const $n: $t = $v;
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}
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}
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constant! {
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BAZ: usize = foo()
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}
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fn main() {
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let x: [usize; foo()] = [];
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}
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