mirror of https://github.com/rust-lang/rust
58 lines
1.1 KiB
Rust
58 lines
1.1 KiB
Rust
//@ run-pass
|
|
#![allow(non_local_definitions)]
|
|
|
|
struct Example<const N: usize>;
|
|
|
|
macro_rules! external_macro {
|
|
() => {{
|
|
const X: usize = 1337;
|
|
X
|
|
}}
|
|
}
|
|
|
|
trait Marker<const N: usize> {}
|
|
impl<const N: usize> Marker<N> for Example<N> {}
|
|
|
|
fn make_marker() -> impl Marker<{
|
|
#[macro_export]
|
|
macro_rules! const_macro { () => {{ 3 }} } inline!()
|
|
}> {
|
|
Example::<{ const_macro!() }>
|
|
}
|
|
|
|
fn from_marker(_: impl Marker<{
|
|
#[macro_export]
|
|
macro_rules! inline { () => {{ 3 }} } inline!()
|
|
}>) {}
|
|
|
|
fn main() {
|
|
let _ok = Example::<{
|
|
#[macro_export]
|
|
macro_rules! gimme_a_const {
|
|
($rusty: ident) => {{ let $rusty = 3; *&$rusty }}
|
|
}
|
|
gimme_a_const!(run)
|
|
}>;
|
|
|
|
let _ok = Example::<{ external_macro!() }>;
|
|
|
|
let _ok: [_; gimme_a_const!(blah)] = [0,0,0];
|
|
let _ok: [[u8; gimme_a_const!(blah)]; gimme_a_const!(blah)];
|
|
let _ok: [u8; gimme_a_const!(blah)];
|
|
|
|
let _ok: [u8; {
|
|
#[macro_export]
|
|
macro_rules! const_two { () => {{ 2 }} }
|
|
const_two!()
|
|
}];
|
|
|
|
let _ok = [0; {
|
|
#[macro_export]
|
|
macro_rules! const_three { () => {{ 3 }} }
|
|
const_three!()
|
|
}];
|
|
let _ok = [0; const_three!()];
|
|
|
|
from_marker(make_marker());
|
|
}
|