结构体
定义:
struct User {
active: bool,
username: String,
email: String,
sign_in_count: u64,
}
创建:
let user1 = User {
email: String::from("someone@example.com"),
username: String::from("someusername123"),
active: true,
sign_in_count: 1,
};
user1.email = String::from("anotheremail@example.com");
根据已有结构体,创建新结构体:
// 注意 user1 的username字段所有权被转移,user1无法使用!
let user2 = User {
email: String::from("another@example.com"),
..user1
};
元组结构体(Tuple Struct)
struct Color(i32, i32, i32);
let black = Color(0, 0, 0);