rust/tests/ui/macros/std-2024-macros.rs

// Tests a small handful of macros in the standard library how they handle the
// new behavior introduced in 2024 that allows `const{}` expressions.

//@ check-pass

fn main() {
    assert_eq!(0, const { 0 });
    assert_eq!(const { 0 }, const { 0 });
    assert_eq!(const { 0 }, 0);

    let _: Vec<Vec<String>> = vec![const { vec![] }];
    let _: Vec<Vec<String>> = vec![const { vec![] }; 10];
}