Macro const_str::concat

source · [−]

macro_rules! concat {
    ($($x: expr),+ $(,)?) => { ... };
}

Expand description

Concatenates values into a string slice.

The input type must be one of

&str
char
bool
u8, u16, u32, u64, u128, usize
i8, i16, i32, i64, i128, isize

Examples

const PROMPT: &str = "The answer is";
const ANSWER: usize = 42;
const MESSAGE: &str = const_str::concat!(PROMPT, " ", ANSWER);

assert_eq!(MESSAGE, "The answer is 42");