// run-pass | |
#![feature(box_syntax)] | |
use std::collections::HashMap; | |
trait Graph<Node, Edge> { | |
fn f(&self, _: Edge); | |
fn g(&self, _: Node); | |
} | |
impl<E> Graph<isize, E> for HashMap<isize, isize> { | |
fn f(&self, _e: E) { | |
panic!(); | |
} | |
fn g(&self, _e: isize) { | |
panic!(); | |
} | |
} | |
pub fn main() { | |
let g : Box<HashMap<isize,isize>> = box HashMap::new(); | |
let _g2 : Box<dyn Graph<isize,isize>> = g as Box<dyn Graph<isize,isize>>; | |
} |