Description
fn main() {
let vec_str = vec!["a", "b", "c"];
println!("vec_str: {:?}", vec_str.iter().foo("b").unwrap());
println!("vec_str: {:?} again", vec_str.iter().foo("b").unwrap());
println!();
/* let vec_int = vec![1, 2, 3];
println!("vec_int: {:?}", vec_int.iter().foo(2).unwrap());
println!("vec_int: {:?} again", vec_int.iter().foo(2).unwrap());
println!();
let arr_int = [1, 2, 3];
println!("arr_int: {:?}", arr_int.iter().foo(2).unwrap());
println!("arr_int: {:?} again", arr_int.iter().foo(2).unwrap());
println!();
*/
// println!("Iter: {:?}", std::env::args().foo("./out".to_string()));
// println!("Iter: {:?} again", std::env::args().foo("./out".to_string()));
}
trait IterExtensions where Self: Iterator {
fn foo(&self, param: &str) -> OptionSelf::Item;
}
impl IterExtensions for Iterator<Item = T> where T: Iterator<Item = T>,
Self::Item: PartialEq {
fn foo(&self, param: &str) -> OptionSelf::Item {
self.skip_while(|elem| *elem != ¶m)
.next()
}
}
/*trait IterExtensions: Iterator {
fn foo(self, param: T) -> OptionSelf::Item
where Self: Iterator + Sized,
for<'a> Self::Item: PartialEq<&'a T> {
foo(self, param)
}
}
impl<T: ?Sized> IterExtensions for T where T: Iterator {}
fn foo<I, T>(iter: I, param: T) -> Option<I::Item>
where I: Iterator,
for<'a> I::Item: PartialEq<&'a T> {
iter.skip_while(|elem| *elem != ¶m)
.next()
}
*/
rustc 1.16.0 (30cf806 2017-03-10)
error: Self type is used before it's determined
--> :26:43
|
26 | Self::Item: PartialEq {
| ^^^^^^^^^^
error: internal compiler error: /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/librustc/ty/mod.rs:1849: No def'n found for DefId { krate: CrateNum(0), node: DefIndex(9) => rust_out/4089d7c8b778d88cec885baf7b69e6df-exe::{{impl}}[0] } in tcx.impl_trait_refs
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
thread 'rustc' panicked at 'Box', /buildslave/rust-buildbot/slave/stable-dist-rustc-linux/build/src/librustc_errors/lib.rs:416
note: Run with RUST_BACKTRACE=1 for a backtrace.
Compilation failed.