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//@ build-fail
//@ revisions: legacy v0
//@[legacy]compile-flags: -Z unstable-options -C symbol-mangling-version=legacy
//@[v0]compile-flags: -C symbol-mangling-version=v0
//@[legacy]normalize-stderr: "h[\w{16}]+" -> "SYMBOL_HASH"
#![feature(rustc_attrs)]
pub(crate) struct Foo<I, E>(I, E);
pub trait Iterator2 {
type Item;
fn next(&mut self) -> Option<Self::Item>;
fn find<P>(&mut self, predicate: P) -> Option<Self::Item>
where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
{
unimplemented!()
}
}
struct Bar;
impl Iterator2 for Bar {
type Item = (u32, u16);
fn next(&mut self) -> Option<Self::Item> {
unimplemented!()
}
}
impl<I, T, E> Iterator2 for Foo<I, E>
where
I: Iterator2<Item = (T, E)>,
{
type Item = T;
#[rustc_symbol_name]
//[legacy]~^ ERROR symbol-name(_ZN72_$LT$issue_75326..Foo$LT$I$C$E$GT$$u20$as$u20$issue_75326..Iterator2$GT$4next
//[legacy]~| ERROR demangling(<issue_75326::Foo<I,E> as issue_75326::Iterator2>::next
//[legacy]~| ERROR demangling-alt(<issue_75326::Foo<I,E> as issue_75326::Iterator2>::next)
//[v0]~^^^^ ERROR symbol-name
//[v0]~| ERROR demangling
//[v0]~| ERROR demangling-alt(<issue_75326::Foo<_, _> as issue_75326::Iterator2>::next)
fn next(&mut self) -> Option<Self::Item> {
self.find(|_| true)
}
}
fn main() {
let mut a = Foo(Bar, 1u16);
let _ = a.next();
}
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