mirror of https://github.com/rust-lang/rust
36 lines
707 B
Rust
36 lines
707 B
Rust
// Test use of min_const_fn without feature gate.
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const fn foo() -> usize { 0 } // stabilized
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trait Foo {
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const fn foo() -> u32; //~ ERROR functions in traits cannot be declared const
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const fn bar() -> u32 { 0 } //~ ERROR functions in traits cannot be declared const
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}
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impl Foo for u32 {
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const fn foo() -> u32 { 0 } //~ ERROR functions in trait impls cannot be declared const
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}
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trait Bar {}
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impl dyn Bar {
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const fn baz() -> u32 { 0 } // stabilized
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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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