为大型数组类型实现调试特征 [英] Implement Debug trait for large array type
问题描述
我收集 Rust 为数组大小提供了调试实现32 及更小.
我还收集我可以实现调试通过简单地使用带有很长格式说明符的 write!
来处理更大的数组.但我想知道是否有更好的方法.
为长度为 1024 的数组实现 Debug 的推荐方法是什么?
use std::fmt;结构体数组{数据:[T;1024]}implfmt::Debug for Array{fn fmt(&self, formatter: &mut fmt::Formatter) ->fmt::结果{self.data[..].fmt(格式化程序)}}fn 主(){让数组 = 数组 { 数据:[0u8;第1024话println!("{:?}", 数组);}
无法为 [T; 实现调试;1024] 或某个具体类型的数组(即 [u8; 1024].从其他 crate 中为来自其他 crate 的类型实现 trait,或从另一个 crate 为泛型类型实现 trait,都是设计不允许的,>
I gather that Rust provides Debug impl's for arrays size 32 and smaller.
I also gather that I could implement Debug on a larger array by simply using write!
with a very long format specifier. But I'm wondering if there's a better way.
What is the recommended method for implementing Debug for an array of length, say, 1024?
use std::fmt;
struct Array<T> {
data: [T; 1024]
}
impl<T: fmt::Debug> fmt::Debug for Array<T> {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
self.data[..].fmt(formatter)
}
}
fn main() {
let array = Array { data: [0u8; 1024] };
println!("{:?}", array);
}
It's not possible to implement Debug for [T; 1024] or some array of a concrete type (ie. [u8; 1024]. Implementing traits from other crates for types from other crates, or implementing a trait from another crate for a generic type, are both not allowed by design,
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