53 lines
1.0 KiB
Rust
53 lines
1.0 KiB
Rust
//@ run-pass
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#![allow(unused_variables)]
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// Parsing patterns with paths with type parameters (issue #22544)
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use std::default::Default;
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#[derive(Default)]
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pub struct Foo<T>(T, T);
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impl<T: ::std::fmt::Display> Foo<T> {
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fn foo(&self) {
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match *self {
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Foo::<T>(ref x, ref y) => println!("Goodbye, World! {} {}", x, y)
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}
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}
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}
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trait Tr { //~ WARN trait `Tr` is never used
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type U;
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}
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impl<T> Tr for Foo<T> {
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type U = T;
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}
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struct Wrapper<T> {
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value: T
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}
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fn main() {
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let Foo::<i32>(a, b) = Default::default();
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let f = Foo(2,3);
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f.foo();
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let w = Wrapper { value: Foo(10u8, 11u8) };
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match w {
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Wrapper::<Foo<u8>> { value: Foo(10, 11) } => {},
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::Wrapper::<<Foo<_> as Tr>::U> { value: Foo::<u8>(11, 16) } => { panic!() },
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_ => { panic!() }
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}
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if let None::<u8> = Some(8) {
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panic!();
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}
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if let None::<u8> { .. } = Some(8) {
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panic!();
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}
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if let Option::None::<u8> { .. } = Some(8) {
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panic!();
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}
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}
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