44 lines
1.2 KiB
Rust
44 lines
1.2 KiB
Rust
|
// revisions: full min
|
||
|
|
#![cfg_attr(full, allow(incomplete_features))]
|
||
|
|
#![cfg_attr(full, feature(const_generics))]
|
||
|
|
#![cfg_attr(min, feature(min_const_generics))]
|
||
|
|
|
||
|
|
fn test<const N: usize>() {
|
||
|
|
struct Foo<const M: usize>;
|
||
|
|
macro_rules! foo {
|
||
|
|
($x:expr) => {
|
||
|
|
[u8; $x] //[full]~ ERROR constant expression depends
|
||
|
|
}
|
||
|
|
}
|
||
|
|
macro_rules! bar {
|
||
|
|
($x:expr) => {
|
||
|
|
[u8; { $x }] //[full]~ ERROR constant expression depends
|
||
|
|
}
|
||
|
|
}
|
||
|
|
macro_rules! baz {
|
||
|
|
( $x:expr) => {
|
||
|
|
Foo<$x> //[full]~ ERROR constant expression depends
|
||
|
|
}
|
||
|
|
}
|
||
|
|
macro_rules! biz {
|
||
|
|
($x:expr) => {
|
||
|
|
Foo<{ $x }> //[full]~ ERROR constant expression depends
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
let _: foo!(N);
|
||
|
|
let _: foo!({ N });
|
||
|
|
let _: foo!({{ N }}); //[min]~ ERROR generic parameters may not
|
||
|
|
let _: bar!(N);
|
||
|
|
let _: bar!({ N }); //[min]~ ERROR generic parameters may not
|
||
|
|
let _: baz!(N); //~ ERROR expressions must be enclosed in braces
|
||
|
|
let _: baz!({ N });
|
||
|
|
let _: baz!({{ N }}); //[min]~ ERROR generic parameters may not
|
||
|
|
let _: biz!(N);
|
||
|
|
let _: biz!({ N }); //[min]~ ERROR generic parameters may not
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
test::<3>();
|
||
|
|
}
|