rust/tests/ui/iterators/iter-count-overflow-debug.rs

// run-pass
// only-32bit too impatient for 2⁶⁴ items
// needs-unwind
// compile-flags: -C debug_assertions=yes -C opt-level=3

use std::panic;

fn main() {
    assert_eq!((0..usize::MAX).by_ref().count(), usize::MAX);

    let r = panic::catch_unwind(|| {
        (0..=usize::MAX).by_ref().count()
    });
    assert!(r.is_err());
}
Explicitly test Iterator::count overflows 2019-07-08 19:03:21 +00:00			`// run-pass`
			`// only-32bit too impatient for 2⁶⁴ items`
Add needs-unwind to tests that depend on panicking This directive isn't automatically set by compiletest or x.py, but can be turned on manually for targets that require it. 2021-12-03 15:32:51 +00:00			`// needs-unwind`
Force optimization in 32-bit iter overflow tests 2019-08-13 00:29:34 +00:00			`// compile-flags: -C debug_assertions=yes -C opt-level=3`
Explicitly test Iterator::count overflows 2019-07-08 19:03:21 +00:00
			`use std::panic;`

			`fn main() {`
Update tests to remove old numeric constants Part of #68490. Care has been taken to leave the old consts where appropriate, for testing backcompat regressions, module shadowing, etc. The intrinsics docs were accidentally referring to some methods on f64 as std::f64, which I changed due to being contrary with how we normally disambiguate the shadow module from the primitive. In one other place I changed std::u8 to std::ops since it was just testing path handling in macros. For places which have legitimate uses of the old consts, deprecated attributes have been optimistically inserted. Although currently unnecessary, they exist to emphasize to any future deprecation effort the necessity of these specific symbols and prevent them from being accidentally removed. 2020-10-24 23:21:40 +00:00			`assert_eq!((0..usize::MAX).by_ref().count(), usize::MAX);`
Explicitly test Iterator::count overflows 2019-07-08 19:03:21 +00:00
			`let r = panic::catch_unwind(\|\| {`
Update tests to remove old numeric constants Part of #68490. Care has been taken to leave the old consts where appropriate, for testing backcompat regressions, module shadowing, etc. The intrinsics docs were accidentally referring to some methods on f64 as std::f64, which I changed due to being contrary with how we normally disambiguate the shadow module from the primitive. In one other place I changed std::u8 to std::ops since it was just testing path handling in macros. For places which have legitimate uses of the old consts, deprecated attributes have been optimistically inserted. Although currently unnecessary, they exist to emphasize to any future deprecation effort the necessity of these specific symbols and prevent them from being accidentally removed. 2020-10-24 23:21:40 +00:00			`(0..=usize::MAX).by_ref().count()`
Explicitly test Iterator::count overflows 2019-07-08 19:03:21 +00:00			`});`
			`assert!(r.is_err());`
			`}`