∅:D[
5.11301] → [
2.422:1519]
type Func<S, T, E> = dyn Fn(&mut S, E) -> T + Sync;
pub struct Processor<S: 'static, T: 'static, E: Clone + 'static> {
processors: Vec<Box<Func<S, Option<T>, E>>>,
default: &'static Func<S, T, E>,
}
impl<S: 'static, T: 'static, E: Clone + 'static> Processor<S, T, E> {
pub fn new<F>(f: &'static F) -> Processor<S, T, E>
where
F: Fn(&mut S, E) -> T + Sync + 'static,
{
Processor {
processors: vec![],
default: f,
}
}
pub fn register<F, A>(&mut self, f: &'static F)
where
F: Fn(&mut S, A) -> T + Sync + 'static,
A: std::convert::TryFrom<E>,
{
self.processors.push(Box::new(move |s, e: E| {
use std::convert::TryInto;
(e.try_into().ok() as Option<A>).map(|a| f(s, a))
}));
}
pub fn process(&self, s: &mut S, e: E) -> T {
for processor in self.processors.iter() {
match processor(s, e.clone()) {
Some(t) => return t,
None => continue,
}
}
(*self.default)(s, e)
}
}
type Func<S, T, E> = dyn Fn(&mut S, E) -> T + Sync;
pub struct Processor<S: 'static, T: 'static, E: Clone + 'static> {
processors: Vec<Box<Func<S, Option<T>, E>>>,
default: &'static Func<S, T, E>,
}
impl<S: 'static, T: 'static, E: Clone + 'static> Processor<S, T, E> {
pub fn new<F>(f: &'static F) -> Processor<S, T, E>
where
F: Fn(&mut S, E) -> T + Sync + 'static,
{
Processor {
processors: vec![],
default: f,
}
}
pub fn register<F, A>(&mut self, f: &'static F)
where
F: Fn(&mut S, A) -> T + Sync + 'static,
A: std::convert::TryFrom<E>,
{
self.processors.push(Box::new(move |s, e: E| {
use std::convert::TryInto;
(e.try_into().ok() as Option<A>).map(|a| f(s, a))
}));
}
pub fn process(&self, s: &mut S, e: E) -> T {
for processor in self.processors.iter() {
match processor(s, e.clone()) {
Some(t) => return t,
None => continue,
}
}
(*self.default)(s, e)
}
}