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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/bench/issue-32062.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/bench/issue-32062.rs')
-rw-r--r-- | tests/ui/bench/issue-32062.rs | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/tests/ui/bench/issue-32062.rs b/tests/ui/bench/issue-32062.rs new file mode 100644 index 000000000..7eb52196e --- /dev/null +++ b/tests/ui/bench/issue-32062.rs @@ -0,0 +1,50 @@ +// run-pass + +// pretty-expanded FIXME #23616 + +fn main() { + let _ = test(Some(0).into_iter()); +} + +trait Parser { + type Input: Iterator; + type Output; + fn parse(self, input: Self::Input) -> Result<(Self::Output, Self::Input), ()>; + fn chain<P>(self, p: P) -> Chain<Self, P> where Self: Sized { + Chain(self, p) + } +} + +struct Token<T>(#[allow(unused_tuple_struct_fields)] T::Item) where T: Iterator; + +impl<T> Parser for Token<T> where T: Iterator { + type Input = T; + type Output = T::Item; + fn parse(self, _input: Self::Input) -> Result<(Self::Output, Self::Input), ()> { + Err(()) + } +} + +struct Chain<L, R>(#[allow(unused_tuple_struct_fields)] L, #[allow(unused_tuple_struct_fields)] R); + +impl<L, R> Parser for Chain<L, R> where L: Parser, R: Parser<Input = L::Input> { + type Input = L::Input; + type Output = (L::Output, R::Output); + fn parse(self, _input: Self::Input) -> Result<(Self::Output, Self::Input), ()> { + Err(()) + } +} + +fn test<I>(i: I) -> Result<((), I), ()> where I: Iterator<Item = i32> { + Chain(Token(0), Token(1)) + .chain(Chain(Token(0), Token(1))) + .chain(Chain(Token(0), Token(1))) + .chain(Chain(Token(0), Token(1))) + .chain(Chain(Token(0), Token(1))) + .chain(Chain(Token(0), Token(1))) + .chain(Chain(Token(0), Token(1))) + .chain(Chain(Token(0), Token(1))) + .chain(Chain(Token(0), Token(1))) + .parse(i) + .map(|(_, i)| ((), i)) +} |