macro_rules! concat { ($($e:expr),* $(,)?) => { ... }; }
Expand description
Concatenates literals into a static string slice.
This macro takes any number of comma-separated literals, yielding an
expression of type &'static str
which represents all of the literals
concatenated left-to-right.
Integer and floating point literals are stringified in order to be concatenated.
§Examples
let s = concat!("test", 10, 'b', true);
assert_eq!(s, "test10btrue");
Run