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|
mod m {
pub const P: usize = 0;
}
const Q: usize = 0;
fn test<const N: usize>() {
struct Foo<const M: usize>;
macro_rules! foo {
($x:expr) => {
[u8; $x]
}
}
macro_rules! bar {
($x:expr) => {
[u8; { $x }]
}
}
macro_rules! baz {
( $x:expr) => {
Foo<$x>
}
}
macro_rules! biz {
($x:expr) => {
Foo<{ $x }>
};
}
let _: foo!(N);
let _: foo!({ N });
let _: foo!({{ N }}); //~ ERROR generic parameters may not
let _: foo!(Q);
let _: foo!(m::P);
let _: bar!(N);
let _: bar!({ N }); //~ ERROR generic parameters may not
let _: bar!(Q);
let _: bar!(m::P);
let _: baz!(N);
let _: baz!({ N });
let _: baz!({{ N }}); //~ ERROR generic parameters may not
let _: baz!(Q);
let _: baz!({ m::P });
let _: baz!(m::P); //~ ERROR expressions must be enclosed in braces
let _: biz!(N);
let _: biz!({ N }); //~ ERROR generic parameters may not
let _: biz!(Q);
let _: biz!(m::P);
let _: foo!(3);
let _: foo!({ 3 });
let _: foo!({{ 3 }});
let _: bar!(3);
let _: bar!({ 3 });
let _: baz!(3);
let _: baz!({ 3 });
let _: baz!({{ 3 }});
let _: biz!(3);
let _: biz!({ 3 });
let _: foo!(10 + 7);
let _: foo!({ 10 + 7 });
let _: foo!({{ 10 + 7 }});
let _: bar!(10 + 7);
let _: bar!({ 10 + 7 });
let _: baz!(10 + 7); //~ ERROR expressions must be enclosed in braces
let _: baz!({ 10 + 7 });
let _: baz!({{ 10 + 7 }});
let _: biz!(10 + 7);
let _: biz!({ 10 + 7 });
}
fn main() {
test::<3>();
}
|
