Macro cluConstData::const_concat

macro_rules! const_concat {
    [->&str: $a: expr, $b: expr] => { ... };
    [->&str: $a: expr, $($b: expr),*] => { ... };
    [$type: ty: $a: expr, $b: expr] => { ... };
    [@$type: ty : $a: expr, $($b: expr),*] => { ... };
    [$type: ty : $a: expr, $($b: expr),*] => { ... };
    [$a: expr, $($b: expr),*] => { ... };
    [$type:ty: $a: expr] => { ... };
    [$a: expr] => { ... };
}

Raw concatenation, see the description of the macro!