3 The tracking issue for this feature is: [#29599]
5 [#29599]: https://github.com/rust-lang/rust/issues/29599
7 ------------------------
9 The `concat_idents` feature adds a macro for concatenating multiple identifiers
15 #![feature(concat_idents)]
18 fn foobar() -> u32 { 23 }
19 let f = concat_idents!(foo, bar);