Created
May 12, 2023 13:07
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Revamped selection API
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struct GlobalState { | |
name: String, | |
age: i32, | |
user: User, | |
} | |
struct User { | |
name: String, | |
age: i32, | |
config: Config, | |
} | |
struct Config { | |
friends: Vec<String>, | |
} | |
struct ProjectedGlobalState { | |
age: Projected<i32>, | |
name: Projected<String>, | |
user: ProjectedUser, | |
} | |
struct ProjectedUser { | |
age: Projected<i32>, | |
name: Projected<String>, | |
config: ProjectedConfig, | |
} | |
struct ProjectedConfig { | |
friends: Projected<Vec<String>>, | |
} | |
struct Projected<T> { | |
_phantom: std::marker::PhantomData<T>, | |
} | |
impl<T> Clone for Projected<T> { | |
fn clone(&self) -> Self { | |
unimplemented!() | |
} | |
} | |
impl<T> Copy for Projected<T> {} | |
fn use_selector<T>(f: impl FnOnce(ProjectedGlobalState) -> Projected<T>) -> T { | |
todo!() | |
} | |
fn main() { | |
let age = use_selector(|state| state.user.config.friends); | |
} |
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