use std::sync::Arc;

pub struct Foo<T> {
    inner: Arc<T>
}

impl<T> Foo<T> {
    pub fn from<U>(v: U) -> Self 
    where U: Into<Arc<T>> {
        Self { inner: v.into() }
    }
    
    pub fn use_inner(&self) -> T where T: Clone {
        (*self.inner).clone()
    }
}

pub fn from_str(a: String) -> Foo<String> {
    Foo::from(a)
}

pub fn from_arc(a: Arc<String>) -> Foo<String> {
    Foo::from(a)
}