Macro core::concat_idents

macro_rules! concat_idents {
    ($($e:ident),+) => { ... };
    ($($e:ident,)+) => { ... };
}

🔬 This is a nightly-only experimental API. (concat_idents_macro #29599)

Concatenate identifiers into one identifier.

For more information, see the documentation for std::concat_idents!.