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use std::collections::HashMap; | |
use std::fmt::Debug; | |
pub trait StaticBuilder { | |
fn build(&self) -> Box<HasName>; | |
} | |
struct UserBuilder; | |
impl StaticBuilder for UserBuilder { | |
fn build(&self) -> Box<HasName> { | |
Box::new(User::new()) | |
} | |
} | |
pub fn type_registry() -> HashMap<u16, Box<StaticBuilder>> { | |
let mut m: HashMap<u16, Box<StaticBuilder>> = HashMap::new(); | |
m.insert(1 as u16, Box::new(UserBuilder)); | |
// m.insert(2 as u16, Box::new(ProfileBuilder)); | |
m | |
} | |
fn main() { | |
let type_registry = type_registry(); | |
let builder = type_registry.get(&(1 as u16)).unwrap(); | |
println!("{:?}", builder.build()); | |
} | |
pub trait HasName: Debug { | |
fn get_name(&self) -> String; | |
} | |
#[derive(Debug)] | |
struct User { | |
name: String | |
} | |
impl User { | |
fn new() -> Self { | |
User { | |
name: "jonah".to_string(), | |
} | |
} | |
} | |
impl HasName for User { | |
fn get_name(&self) -> String { | |
self.name.clone() | |
} | |
} |
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