structural 0.2.2

Abstractions over fields.
Documentation 
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use std_::cell::Cell;


///////////////////////////////////////////////////////////////////////////////

/// Used to test that types that manually drop stuff do it correctly.
pub(crate) struct DecOnDrop<'a>{
    counter:&'a Cell<usize>,
}

impl<'a> DecOnDrop<'a>{
    pub(crate) fn new(counter:&'a Cell<usize>)->Self{
        counter.set(counter.get()+1);
        
        Self{
            counter,
        }
    }
}

impl<'a> Clone for DecOnDrop<'a>{
    fn clone(&self)->Self{
        self.counter.set(self.counter.get()+1);
        Self{
            counter:self.counter,
        }
    }
}

impl<'a> Drop for DecOnDrop<'a>{
    fn drop(&mut self){
         self.counter.set(self.counter.get()-1);
    }
}


///////////////////////////////////////////////////////////////////////////////