rust - 将成员的所有权从一个结构转移到另一个结构？

Question

我有 2 个结构:

struct MyVector {
    storage: Vec<u32>,
}

struct MyVectorBuilder {
    storage: Vec<u32>,
}

impl MyVectorBuilder {
    fn new() -> MyVectorBuilder {
        MyVectorBuilder { storage: Vec::new() }
    }

    fn build_my_vector(&mut self) -> MyVector {
        // Doesn't compile: ^^^^ cannot move out of borrowed content
        MyVector { storage: self.storage }
    }
}

有没有办法告诉编译器 MyVectorBuilder 在调用 build_my_vector() 后将不会被使用，所以它会让我移动 storage 到 MyVector?

Answer 1

是的。将 MyVectorBuilder 的所有权传递给 MakeMyVector

fn make_my_vector(self) -> MyVector {
    MyVector { storage: self.storage }
}