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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/iterators/iter-map-fold-type-length.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/iterators/iter-map-fold-type-length.rs')
-rw-r--r-- | tests/ui/iterators/iter-map-fold-type-length.rs | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/tests/ui/iterators/iter-map-fold-type-length.rs b/tests/ui/iterators/iter-map-fold-type-length.rs new file mode 100644 index 000000000..8ce4fcd87 --- /dev/null +++ b/tests/ui/iterators/iter-map-fold-type-length.rs @@ -0,0 +1,38 @@ +// run-pass +//! Check that type lengths don't explode with `Map` folds. +//! +//! The normal limit is a million, and this test used to exceed 1.5 million, but +//! now we can survive an even tighter limit. Still seems excessive though... +#![type_length_limit = "256000"] + +// Custom wrapper so Iterator methods aren't specialized. +struct Iter<I>(I); + +impl<I> Iterator for Iter<I> +where + I: Iterator +{ + type Item = I::Item; + + fn next(&mut self) -> Option<Self::Item> { + self.0.next() + } +} + +fn main() { + let c = Iter(0i32..10) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .map(|x| x) + .count(); + assert_eq!(c, 10); +} |