Rust 需要一个有序向量来进行 struct 初始化

要做到这一点，您可以创建一个const，它运行一些逻辑来验证不变量是否被维护，如果它们被 destruct ，则会出现panic .死机将转化为编译失败:

macro_rules! create_1d_lookup {
    (($($bps:expr,)*); ($($vals:expr,)*)) => {{
        const _: () = {
            let breakpoints = [ $($bps,)* ];
            if breakpoints.len() != [ $($vals,)* ].len() {
                // There are multiple ways to count in macros,
                // this is the simplest assuming the expressions are side-effect-free.
                panic!("sizes of vectors don't match");
            }

            let mut i = 1;
            // Can't use a `for` loop in consts currently.
            while i < breakpoints.len() {
                if breakpoints[i - 1] > breakpoints[i] {
                    panic!("breakpoints aren't sorted");
                }
                i += 1;
            }
        };
        // $crate::my_crate::OneDLookup::new(vec![$($bps),+], vec![$($vals),+])
        OneDLookup::new(vec![$($bps),+], vec![$($vals),+])
    }};
}

不幸的是，这是一个后单态化错误，这意味着它不会出现在cargo check中，而只会出现在cargo build中.