1 #[allow(unused_assignments, unused_mut, unused_variables)]
2 pub const STD: &str = {
3     let mut flag = "c++11";
4 
5     #[cfg(feature = "c++14")]
6     (flag = "c++14");
7 
8     #[cfg(feature = "c++17")]
9     (flag = "c++17");
10 
11     #[cfg(feature = "c++20")]
12     (flag = "c++20");
13 
14     flag
15 };
16