Auto merge of #57475 - SimonSapin:signed, r=estebank

Add signed num::NonZeroI* types

Multiple people have asked for them in https://github.com/rust-lang/rust/issues/49137. Given that the unsigned ones already exist, they are very easy to add and not an additional maintenance burden.

1 files changed, 9 insertions, 1 deletions

diff --git a/src/libcore/tests/nonzero.rs b/src/libcore/tests/nonzero.rs
index c813bf20cb6..4532568ee0c 100644
--- a/src/libcore/tests/nonzero.rs
+++ b/src/libcore/tests/nonzero.rs
@@ -1,4 +1,4 @@
-use core::num::NonZeroU32;
+use core::num::{NonZeroU32, NonZeroI32};
 use core::option::Option;
 use core::option::Option::{Some, None};
 use std::mem::size_of;
@@ -13,6 +13,7 @@ fn test_create_nonzero_instance() {
 #[test]
 fn test_size_nonzero_in_option() {
     assert_eq!(size_of::<NonZeroU32>(), size_of::<Option<NonZeroU32>>());
+    assert_eq!(size_of::<NonZeroI32>(), size_of::<Option<NonZeroI32>>());
 }
 
 #[test]
@@ -118,3 +119,10 @@ fn test_from_nonzero() {
     let num: u32 = nz.into();
     assert_eq!(num, 1u32);
 }
+
+#[test]
+fn test_from_signed_nonzero() {
+    let nz = NonZeroI32::new(1).unwrap();
+    let num: i32 = nz.into();
+    assert_eq!(num, 1i32);
+}