| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![feature(default_type_parameter_fallback)] |
| |
| use std::fmt::Debug; |
| |
| // Example from the RFC |
| fn foo<F:Default=usize>() -> F { F::default() } |
| //~^ NOTE: a default was defined here... |
| |
| fn bar<B:Debug=isize>(b: B) { println!("{:?}", b); } |
| //~^ NOTE: a second default was defined here... |
| |
| fn main() { |
| // Here, F is instantiated with $0=uint |
| let x = foo(); |
| //~^ ERROR: mismatched types |
| //~| expected type `usize` |
| //~| found type `isize` |
| //~| NOTE: conflicting type parameter defaults `usize` and `isize` |
| //~| NOTE: conflicting type parameter defaults `usize` and `isize` |
| //~| NOTE: ...that was applied to an unconstrained type variable here |
| |
| // Here, B is instantiated with $1=uint, and constraint $0 <: $1 is added. |
| bar(x); |
| //~^ NOTE: ...that also applies to the same type variable here |
| } |
