rust_prac 0.1.0

a simple test
Documentation 
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pub struct Test<T>
where
  T: Fn(u32) -> u32
{
  f: T
}
impl<T> Test<T> 
where
  T: Fn(u32) -> u32
{
  pub fn new(_f: T) -> Test{
    Test{f: _f}
  }
}
use std::time::Duration;
use std::thread;
pub fn k(){
  thread::sleep(Duration::from_secs(1));
  println!("revue");
  let a = Test::new(k);
  a.f();
}