1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58

use std::cell::UnsafeCell;
use std::rc::Rc;
use std::os::raw::c_void;

use crate::priv_traits::*;
use crate::Sender;

pub struct SkipWhile<'a, T, F: FnMut(&T) -> bool>{
    f: F,
    skipped: bool,
    sender: Sender<'a,T>,
}

impl<'a, T, F: FnMut(&T) -> bool> SkipWhile<'a,T,F>{
    pub fn new(f: F) -> SkipWhile<'a,T,F>{
        SkipWhile{
            f: f,
            skipped: false,
            sender: Sender::new(),
        }
    }
}

impl<'a,T, F: FnMut(&T) -> bool> StreamInner<'a,T> for SkipWhile<'a,T,F>{
    #[inline]
    fn push(&mut self, st: Rc<UnsafeCell<dyn SinkInner<'a,T>+'a>>){
        self.sender.push(st)
    }

    #[inline]
    fn send(&mut self, t: T){
        self.sender.send(t)
    }
}

impl<'a, T, F: FnMut(&T) -> bool> Remove for SkipWhile<'a, T,F>{
    fn remove_raw(&mut self, st: *const c_void){
        self.sender.remove_raw(st)
    }
}

impl<'a,T, F: FnMut(&T) -> bool> SinkInner<'a,T> for SkipWhile<'a, T,F>{
    #[inline]
    fn call(&mut self, t: T) -> Result<(),()>{
        if !self.skipped && (self.f)(&t) {
            Ok(())
        }else{
            self.skipped = true;
            self.sender.send(t);
            Ok(())
        }
    }

    #[inline]
    fn is_alive(&self) -> bool {
        true
    }
}