'use' 关键字不起作用 Rust（从兄弟文件调用）

Question

I'm trying to use a struct from a value.rs file from chunk.rs , but it is not working. This is my current file hierarchy.

src
|
|---value.rs
|---chunk.rs
|---other files

Here is my value.rs code:

pub enum Value {
}

pub struct ValueArray {
    values: Vec<Value>,
}

pub impl Value {
    pub fn new() -> Value {
        Value {
            values: Vec::new(),
        }
    }

    pub fn write_chunk(&mut self, value: Value) {
        self.code.push(value);
    }
}

Here is my chunk.rs code:

use crate::value::ValueArray; // Error Here

pub enum OpCode {
    OpReturn,
}

pub struct Chunk {
    pub code: Vec<OpCode>,
    constants: value::ValueArray,
}

impl Chunk {
    pub fn new() -> Chunk {
        Chunk {
            code: Vec::new(),
            constants: value::ValueArray::new(),
        }
    }

    pub fn write_chunk(&mut self, byte: OpCode) {
        self.code.push(byte);
    }
}

This is my exact error message:

unresolved import `crate::value`
could not find `value` in the crate rootrustc(E0432)
chunk.rs(1, 12): could not find `value` in the crate root

I'm not sure why it isn't working since I've done something very similar in another sibling file. I'm new to Rust, so I appreciate all of your help. Thanks

Answer 1

您需要在lib.rs文件上定义value模块

pub mod value;

Answer 2

The syntax I'm using to include a file ("lib.rs") with naked structs/functions (no explicit module defined) is:

mod lib;
use crate::lib::*;

So you must be missing mod value; .