| // 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. |
| |
| // Parsing patterns with paths with type parameters (issue #22544) |
| |
| use std::default::Default; |
| |
| #[derive(Default)] |
| pub struct Foo<T>(T, T); |
| |
| impl<T: ::std::fmt::Display> Foo<T> { |
| fn foo(&self) { |
| match *self { |
| Foo::<T>(ref x, ref y) => println!("Goodbye, World! {} {}", x, y) |
| } |
| } |
| } |
| |
| trait Tr { |
| type U; |
| } |
| |
| impl<T> Tr for Foo<T> { |
| type U = T; |
| } |
| |
| struct Wrapper<T> { |
| value: T |
| } |
| |
| fn main() { |
| let Foo::<i32>(a, b) = Default::default(); |
| |
| let f = Foo(2,3); |
| f.foo(); |
| |
| let w = Wrapper { value: Foo(10u8, 11u8) }; |
| match w { |
| Wrapper::<Foo<u8>> { value: Foo(10, 11) } => {}, |
| ::Wrapper::<<Foo<_> as Tr>::U> { value: Foo::<u8>(11, 16) } => { panic!() }, |
| _ => { panic!() } |
| } |
| |
| if let None::<u8> = Some(8) { |
| panic!(); |
| } |
| } |