src/test/run-pass/unboxed-closures-infer-arg-types-from-expected-bound.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Test that we are able to infer that the type of `x` is `isize` based
  12 // on the expected type from the object.
  13
  14 // pretty-expanded FIXME #23616
  15
  16 pub trait ToPrimitive {
  17     fn to_int(&self) {}
  18 }
  19
  20 impl ToPrimitive for isize {}
  21 impl ToPrimitive for i32 {}
  22 impl ToPrimitive for usize {}
  23
  24 fn doit<T,F>(val: T, f: &F)
  25     where F : Fn(T)
  26 {
  27     f(val)
  28 }
  29
  30 pub fn main() {
  31     doit(0, &|x /*: isize*/ | { x.to_int(); });
  32 }