File: unboxed-closures-infer-arg-types-from-expected-object-type.rs

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//@ run-pass
// Test that we are able to infer that the type of `x` is `isize` based
// on the expected type from the object.


pub trait ToPrimitive {
    fn to_int(&self) {}
}

impl ToPrimitive for isize {}
impl ToPrimitive for i32 {}
impl ToPrimitive for usize {}

fn doit<T>(val: T, f: &dyn Fn(T)) { f(val) }

pub fn main() {
    doit(0, &|x /*: isize*/ | { x.to_int(); });
}