1
2
3
4
5
6
7
8
9
10
11
12
13
#[macro_export]
macro_rules! extend_string {
( $string:expr; $( $str_:expr ),* ) => ({
let mut space_needed = 0;
$(
space_needed += $str_.len();
)*
$string.reserve_exact(space_needed);
$(
$string.push_str($str_);
)*
});
}