Created
September 24, 2014 22:38
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use std::io::timer; | |
use std::time::Duration; | |
use std::sync::Future; | |
trait Constraint { | |
fn is_satisfied(&self) -> bool; | |
} | |
#[deriving(Send)] | |
struct Foo { | |
name: &'static str, | |
a: bool, | |
b: bool, | |
} | |
#[deriving(Send)] | |
struct Bar { | |
name: &'static str, | |
a: bool, | |
} | |
impl Constraint for Foo { | |
fn is_satisfied(&self) -> bool { | |
let res = self.a && self.b; | |
timer::sleep(Duration::seconds(1)); | |
println!("Foo {} is {}" , self . name , res); | |
res | |
} | |
} | |
impl Constraint for Bar { | |
fn is_satisfied(&self) -> bool { | |
let res = self.a; | |
println!("Bar {} is {}" , self . name , res); | |
res | |
} | |
} | |
fn main() { | |
let mut cs: Vec<Box<Constraint+Send>> = Vec::with_capacity(10); | |
cs.push(box Foo{name: "c1", a: true, b: true,} as Box<Constraint+Send>); | |
cs.push(box Foo{name: "c2", a: true, b: true,} as Box<Constraint+Send>); | |
cs.push(box Foo{name: "c3", a: true, b: true,} as Box<Constraint+Send>); | |
cs.push(box Bar{name: "c4", a: true,} as Box<Constraint+Send>); | |
cs.push(box Bar{name: "c5", a: false,} as Box<Constraint+Send>); | |
cs.push(box Foo{name: "c6", a: true, b: true,} as Box<Constraint+Send>); | |
cs.push(box Foo{name: "c7", a: true, b: true,} as Box<Constraint+Send>); | |
cs.push(box Bar{name: "c8", a: true,} as Box<Constraint+Send>); | |
cs.push(box Bar{name: "c9", a: true,} as Box<Constraint+Send>); | |
cs.push(box Foo{name: "c10", a: true, b: true,} as Box<Constraint+Send>); | |
let mut results : Vec<Receiver<bool>> = Vec::with_capacity(10); | |
for c in cs.iter() { | |
let (tx,rx) = channel(); | |
spawn(proc(){ | |
let res = c.is_satisfied(); | |
tx.send(res); | |
}); | |
results.push(rx); | |
} | |
} |
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