如果已实现fmt :: Display，如何打印结构的切片或数组？

Question

我有一个结构：

use std::fmt;

struct SomeStruct {
    e1: i32,
    e2: f64,
}

impl fmt::Display for SomeStruct {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "({}, {})", self.e1, self.e2)
    }
}

fn printstuff(name: &str, slc: &[SomeStruct]) {
    println!("{} is {}", name, slc);
}

fn main() {
    let cap = [
        SomeStruct { e1: 1, e2: 1.1 },
        SomeStruct { e1: 2, e2: 2.2 },
        SomeStruct { e1: 3, e2: 3.3 },
        SomeStruct { e1: 4, e2: 4.4 },
    ];
    for elem in &cap {
        println!("  {}", elem);
    }
    println!("cap[1]={}", cap[1]);
    println!("cap[2]={}", cap[2]);
    printstuff("cap", cap);
}

我已经实现了fmt::Display，但是当我尝试打印SomeStruct的切片或数组时，出现编译错误：

error[E0277]: `[SomeStruct]` doesn't implement `std::fmt::Display`
  --> src/main.rs:15:32
   |
15 |     println!("{} is {}", name, slc);
   |                                ^^^ `[SomeStruct]` cannot be formatted with the default formatter
   |
   = help: the trait `std::fmt::Display` is not implemented for `[SomeStruct]`
   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
   = note: required because of the requirements on the impl of `std::fmt::Display` for `&[SomeStruct]`
   = note: required by `std::fmt::Display::fmt`

这很有意义-我没有为Display实现[SomeStruct]。我该怎么做呢？我找不到任何Rust文档或任何其他能表明我该怎么做的东西。