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//@ 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 = "1327047"]
// 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);
}
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