具有泛型类型的结构向量“未实现特征core :: marker :: Sized`”

Question

I'm trying to set a value in a struct with an Any type in a generic, i'm going to use it later for writing to redis.

struct Property<T> {
  value: T,
}
struct Process {
  properties: Option<[Property<Any>]>,
}

This returns an error:

the trait `core::marker::Sized` is not implemented for the type `[Property<core::any::Any + 'static>]`

Edit

After reading all the links from the comment, I would like to explain that I would love to have a property that can accept any primitive type as a value:

use std::any::*;

struct Property<T> {
    value: T,
}

struct Process {
    properties: Option<Property<Any>>,
}

fn main() {
    let p = Process {
            properties: Some(
                Property::<String>{
                    value: ""
                }
            )
        };

    let p2 = Process {
            properties: Some(
                Property::<u32>{
                    value: 150
                }
            )
        };
}

Answer 1

You could use a vector instead:

struct Process {
  properties: Option<Vec<Property<Any>>>,
}

The error says, that core::marker::Sized is not implemented, so the size is not known at compile time.

See here for little more information about the distinction between arrays and vectors.