31 lines
460 B
Rust
31 lines
460 B
Rust
//@ build-fail
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fn main() {
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let mut it = (Empty);
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rec(&mut it);
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}
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struct Empty;
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impl Iterator for Empty {
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type Item = ();
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fn next<'a>(&'a mut self) -> core::option::Option<()> {
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None
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}
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}
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fn identity<T>(x: T) -> T {
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x
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}
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fn rec<T>(mut it: T)
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where
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T: Iterator,
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{
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if () == () {
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T::count(it);
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//~^ ERROR: reached the recursion limit while instantiating
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} else {
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rec(identity(&mut it))
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}
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}
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