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stabilize new RangeToInclusive type - #152304

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pitaj:stabilize-new_range_api
Mar 2, 2026
Merged

stabilize new RangeToInclusive type#152304
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api

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@pitajpitaj commented Feb 7, 2026

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stabilizes core::range::RangeToInclusive

// in core::rangepubstructRangeToInclusive<Idx>{publast:Idx,}impl<Idx: fmt::Debug> fmt::DebugforRangeInclusive<Idx>{/* ... */}impl<Idx:PartialOrd<Idx>>RangeToInclusive<Idx>{pubconstfncontains<U>(&self,item:&U) -> boolwhereIdx:[const]PartialOrd<U>,U: ?Sized + [const]PartialOrd<Idx>;}impl<T> const RangeBounds<T>forRangeToInclusive<T>{/* ... */}impl<T>constRangeBounds<T>forRangeToInclusive<&T>{/* ... */}impl<T>constFrom<RangeToInclusive<T>>for legacy::RangeToInclusive<T>{/* ... */}impl<T>constFrom<legacy::RangeToInclusive<T>>forRangeToInclusive<T>{/* ... */}unsafeimpl<T>constSliceIndex<[T]>for range::RangeToInclusive<usize>{typeOutput = [T];/* ... */}unsafeimplconstSliceIndex<str>for range::RangeToInclusive<usize>{typeOutput = str;/* ... */}

Tracking issue: #125687

r? @tgross35

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 7, 2026
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I think there is a small change needed here but otherwise LGTM. However, I noticed there are some trait implementations missing compared to ops::RangeToInclusive:

  • OneSidedRange<T>
  • RangeBounds<T> for RangeToInclusive<&T> (currently has for RangeToInclusive<T>
  • SliceIndex<ByteStr> for RangeToInclusive<usize> (unstable)
  • SliceIndex<str> for RangeToInclusive<usize>

Would you mind putting up a PR adding those? We can re-nominate this for libs-api after.

View changes since this review

Comment threadlibrary/core/src/range.rs
@rustbotrustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 9, 2026
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Reminder, once the PR becomes ready for a review, use @rustbot ready.

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Index<RangeFrom<usize>> for CStr is also missing in the new RangeFrom

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@rustbot ready

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 14, 2026
Comment on lines +719 to +740
#[unstable(feature = "new_range_api", issue = "125687")]
impl ops::Index<range::RangeFrom<usize>> for CStr {
type Output = CStr;

#[inline]
fn index(&self, index: range::RangeFrom<usize>) -> &CStr {
let bytes = self.to_bytes_with_nul();
// we need to manually check the starting index to account for the null
// byte, since otherwise we could get an empty string that doesn't end
// in a null.
if index.start < bytes.len() {
// SAFETY: Non-empty tail of a valid `CStr` is still a valid `CStr`.
unsafe { CStr::from_bytes_with_nul_unchecked(&bytes[index.start..]) }
} else {
panic!(
"index out of bounds: the len is {} but the index is {}",
bytes.len(),
index.start
);
}
}
}

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This impl can probably forward to ops::RangeFrom so we don't have the same thing twice, or vice versa

@tgross35

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One note but otherwise the changes here LGTM. Nominating for libs-api to take a look because there are two new impls that weren't present for the FCP at #125687 (comment):

implRangeBounds<T>forRangeToInclusive<&T>{/* ... */}implSliceIndex<str>forRangeToInclusive<usize>{/* ... */}

These match up with what is present on the existing RangeToInclusive.

@rustbot label +I-libs-api-nominated

@rustbotrustbot added the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 16, 2026

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Everything here LGTM but it needs somebody from @rust-lang/libs-api to okay the above additions. I don't expect it to need a new FCP since they match the old RangeToInclusive.

Last two commits could be squashed.

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We discussed this in the @rust-lang/libs-api meeting and we are happy with the added trait impls.

@AmanieuAmanieu removed the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 24, 2026
stabilizes `core::range::RangeToInclusive`
add missing trait impls for new RangeToInclusive
add missing trait impls for new RangeFrom
@pitaj
pitajforce-pushed the stabilize-new_range_api branch from 682fb44 to bc4ceadCompareMarch 1, 2026 04:46
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

@pitaj

pitaj commented Mar 1, 2026

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@rustbot ready

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rust-borsBot commented Mar 2, 2026

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📌 Commit bc4cead has been approved by tgross35

It is now in the queue for this repository.

@rust-borsrust-borsBot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 2, 2026
Comment on lines +700 to 703
// #[stable(feature = "new_range_to_inclusive_api", since = "CURRENT_RUSTC_VERSION")]
#[unstable(feature = "range_into_bounds", issue = "136903")]
#[rustc_const_unstable(feature = "const_range", issue = "none")]
impl<T> const IntoBounds<T> for RangeToInclusive<T> {

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Probably no need to have this comment, we can't have >1 #[stable] if range_into_bounds gets stabilized.

jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
Rollup of 6 pull requests
Successful merges:
- #153015 (core: make atomic primitives type aliases of `Atomic<T>`)
- #153046 (Couple of cg_ssa refactorings)
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
…uwer
Rollup of 6 pull requests
Successful merges:
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153046 (Couple of cg_ssa refactorings)
- #153090 (elf-raw-dylib: set type for functions)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
@rust-bors
rust-borsBot merged commit 44c7081 into rust-lang:mainMar 2, 2026
11 checks passed
@rustbotrustbot added this to the 1.96.0 milestone Mar 2, 2026
rust-timer added a commit that referenced this pull request Mar 2, 2026
Rollup merge of #152304 - pitaj:stabilize-new_range_api, r=tgross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: #125687
@tgross35tgross35 added the relnotes Marks issues that should be documented in the release notes of the next release. label Mar 2, 2026
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@pitaj@rustbot@tgross35@Amanieu
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stabilize new RangeToInclusive type by pitaj · Pull Request #152304 · rust-lang/rust · GitHub
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stabilize new RangeToInclusive type - #152304

Merged
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api
Mar 2, 2026
Merged

stabilize new RangeToInclusive type#152304
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api

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@pitaj

@pitajpitaj commented Feb 7, 2026

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stabilizes core::range::RangeToInclusive

// in core::rangepubstructRangeToInclusive<Idx>{publast:Idx,}impl<Idx: fmt::Debug> fmt::DebugforRangeInclusive<Idx>{/* ... */}impl<Idx:PartialOrd<Idx>>RangeToInclusive<Idx>{pubconstfncontains<U>(&self,item:&U) -> boolwhereIdx:[const]PartialOrd<U>,U: ?Sized + [const]PartialOrd<Idx>;}impl<T> const RangeBounds<T>forRangeToInclusive<T>{/* ... */}impl<T>constRangeBounds<T>forRangeToInclusive<&T>{/* ... */}impl<T>constFrom<RangeToInclusive<T>>for legacy::RangeToInclusive<T>{/* ... */}impl<T>constFrom<legacy::RangeToInclusive<T>>forRangeToInclusive<T>{/* ... */}unsafeimpl<T>constSliceIndex<[T]>for range::RangeToInclusive<usize>{typeOutput = [T];/* ... */}unsafeimplconstSliceIndex<str>for range::RangeToInclusive<usize>{typeOutput = str;/* ... */}

Tracking issue: #125687

r? @tgross35

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 7, 2026
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I think there is a small change needed here but otherwise LGTM. However, I noticed there are some trait implementations missing compared to ops::RangeToInclusive:

  • OneSidedRange<T>
  • RangeBounds<T> for RangeToInclusive<&T> (currently has for RangeToInclusive<T>
  • SliceIndex<ByteStr> for RangeToInclusive<usize> (unstable)
  • SliceIndex<str> for RangeToInclusive<usize>

Would you mind putting up a PR adding those? We can re-nominate this for libs-api after.

View changes since this review

Comment threadlibrary/core/src/range.rs
@rustbotrustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 9, 2026
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Reminder, once the PR becomes ready for a review, use @rustbot ready.

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Index<RangeFrom<usize>> for CStr is also missing in the new RangeFrom

@pitaj

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@rustbot ready

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 14, 2026
Comment on lines +719 to +740
#[unstable(feature = "new_range_api", issue = "125687")]
impl ops::Index<range::RangeFrom<usize>> for CStr {
type Output = CStr;

#[inline]
fn index(&self, index: range::RangeFrom<usize>) -> &CStr {
let bytes = self.to_bytes_with_nul();
// we need to manually check the starting index to account for the null
// byte, since otherwise we could get an empty string that doesn't end
// in a null.
if index.start < bytes.len() {
// SAFETY: Non-empty tail of a valid `CStr` is still a valid `CStr`.
unsafe { CStr::from_bytes_with_nul_unchecked(&bytes[index.start..]) }
} else {
panic!(
"index out of bounds: the len is {} but the index is {}",
bytes.len(),
index.start
);
}
}
}

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This impl can probably forward to ops::RangeFrom so we don't have the same thing twice, or vice versa

@tgross35

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One note but otherwise the changes here LGTM. Nominating for libs-api to take a look because there are two new impls that weren't present for the FCP at #125687 (comment):

implRangeBounds<T>forRangeToInclusive<&T>{/* ... */}implSliceIndex<str>forRangeToInclusive<usize>{/* ... */}

These match up with what is present on the existing RangeToInclusive.

@rustbot label +I-libs-api-nominated

@rustbotrustbot added the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 16, 2026

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Everything here LGTM but it needs somebody from @rust-lang/libs-api to okay the above additions. I don't expect it to need a new FCP since they match the old RangeToInclusive.

Last two commits could be squashed.

View changes since this review

@Amanieu

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We discussed this in the @rust-lang/libs-api meeting and we are happy with the added trait impls.

@AmanieuAmanieu removed the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 24, 2026
stabilizes `core::range::RangeToInclusive`
add missing trait impls for new RangeToInclusive
add missing trait impls for new RangeFrom
@pitaj
pitajforce-pushed the stabilize-new_range_api branch from 682fb44 to bc4ceadCompareMarch 1, 2026 04:46
@rustbot

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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

@pitaj

pitaj commented Mar 1, 2026

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@rustbot ready

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rust-borsBot commented Mar 2, 2026

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📌 Commit bc4cead has been approved by tgross35

It is now in the queue for this repository.

@rust-borsrust-borsBot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 2, 2026
Comment on lines +700 to 703
// #[stable(feature = "new_range_to_inclusive_api", since = "CURRENT_RUSTC_VERSION")]
#[unstable(feature = "range_into_bounds", issue = "136903")]
#[rustc_const_unstable(feature = "const_range", issue = "none")]
impl<T> const IntoBounds<T> for RangeToInclusive<T> {

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Probably no need to have this comment, we can't have >1 #[stable] if range_into_bounds gets stabilized.

jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
Rollup of 6 pull requests
Successful merges:
- #153015 (core: make atomic primitives type aliases of `Atomic<T>`)
- #153046 (Couple of cg_ssa refactorings)
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
…uwer
Rollup of 6 pull requests
Successful merges:
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153046 (Couple of cg_ssa refactorings)
- #153090 (elf-raw-dylib: set type for functions)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
@rust-bors
rust-borsBot merged commit 44c7081 into rust-lang:mainMar 2, 2026
11 checks passed
@rustbotrustbot added this to the 1.96.0 milestone Mar 2, 2026
rust-timer added a commit that referenced this pull request Mar 2, 2026
Rollup merge of #152304 - pitaj:stabilize-new_range_api, r=tgross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: #125687
@tgross35tgross35 added the relnotes Marks issues that should be documented in the release notes of the next release. label Mar 2, 2026
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stabilize new RangeToInclusive type - #152304

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pitaj:stabilize-new_range_api
Mar 2, 2026
Merged

stabilize new RangeToInclusive type#152304
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api

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@pitaj

@pitajpitaj commented Feb 7, 2026

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stabilizes core::range::RangeToInclusive

// in core::rangepubstructRangeToInclusive<Idx>{publast:Idx,}impl<Idx: fmt::Debug> fmt::DebugforRangeInclusive<Idx>{/* ... */}impl<Idx:PartialOrd<Idx>>RangeToInclusive<Idx>{pubconstfncontains<U>(&self,item:&U) -> boolwhereIdx:[const]PartialOrd<U>,U: ?Sized + [const]PartialOrd<Idx>;}impl<T> const RangeBounds<T>forRangeToInclusive<T>{/* ... */}impl<T>constRangeBounds<T>forRangeToInclusive<&T>{/* ... */}impl<T>constFrom<RangeToInclusive<T>>for legacy::RangeToInclusive<T>{/* ... */}impl<T>constFrom<legacy::RangeToInclusive<T>>forRangeToInclusive<T>{/* ... */}unsafeimpl<T>constSliceIndex<[T]>for range::RangeToInclusive<usize>{typeOutput = [T];/* ... */}unsafeimplconstSliceIndex<str>for range::RangeToInclusive<usize>{typeOutput = str;/* ... */}

Tracking issue: #125687

r? @tgross35

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 7, 2026
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I think there is a small change needed here but otherwise LGTM. However, I noticed there are some trait implementations missing compared to ops::RangeToInclusive:

  • OneSidedRange<T>
  • RangeBounds<T> for RangeToInclusive<&T> (currently has for RangeToInclusive<T>
  • SliceIndex<ByteStr> for RangeToInclusive<usize> (unstable)
  • SliceIndex<str> for RangeToInclusive<usize>

Would you mind putting up a PR adding those? We can re-nominate this for libs-api after.

View changes since this review

Comment threadlibrary/core/src/range.rs
@rustbotrustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 9, 2026
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Index<RangeFrom<usize>> for CStr is also missing in the new RangeFrom

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@rustbot ready

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 14, 2026
Comment on lines +719 to +740
#[unstable(feature = "new_range_api", issue = "125687")]
impl ops::Index<range::RangeFrom<usize>> for CStr {
type Output = CStr;

#[inline]
fn index(&self, index: range::RangeFrom<usize>) -> &CStr {
let bytes = self.to_bytes_with_nul();
// we need to manually check the starting index to account for the null
// byte, since otherwise we could get an empty string that doesn't end
// in a null.
if index.start < bytes.len() {
// SAFETY: Non-empty tail of a valid `CStr` is still a valid `CStr`.
unsafe { CStr::from_bytes_with_nul_unchecked(&bytes[index.start..]) }
} else {
panic!(
"index out of bounds: the len is {} but the index is {}",
bytes.len(),
index.start
);
}
}
}

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This impl can probably forward to ops::RangeFrom so we don't have the same thing twice, or vice versa

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One note but otherwise the changes here LGTM. Nominating for libs-api to take a look because there are two new impls that weren't present for the FCP at #125687 (comment):

implRangeBounds<T>forRangeToInclusive<&T>{/* ... */}implSliceIndex<str>forRangeToInclusive<usize>{/* ... */}

These match up with what is present on the existing RangeToInclusive.

@rustbot label +I-libs-api-nominated

@rustbotrustbot added the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 16, 2026

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Everything here LGTM but it needs somebody from @rust-lang/libs-api to okay the above additions. I don't expect it to need a new FCP since they match the old RangeToInclusive.

Last two commits could be squashed.

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We discussed this in the @rust-lang/libs-api meeting and we are happy with the added trait impls.

@AmanieuAmanieu removed the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 24, 2026
stabilizes `core::range::RangeToInclusive`
add missing trait impls for new RangeToInclusive
add missing trait impls for new RangeFrom
@pitaj
pitajforce-pushed the stabilize-new_range_api branch from 682fb44 to bc4ceadCompareMarch 1, 2026 04:46
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

@pitaj

pitaj commented Mar 1, 2026

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@rustbot ready

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rust-borsBot commented Mar 2, 2026

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📌 Commit bc4cead has been approved by tgross35

It is now in the queue for this repository.

@rust-borsrust-borsBot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 2, 2026
Comment on lines +700 to 703
// #[stable(feature = "new_range_to_inclusive_api", since = "CURRENT_RUSTC_VERSION")]
#[unstable(feature = "range_into_bounds", issue = "136903")]
#[rustc_const_unstable(feature = "const_range", issue = "none")]
impl<T> const IntoBounds<T> for RangeToInclusive<T> {

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Probably no need to have this comment, we can't have >1 #[stable] if range_into_bounds gets stabilized.

jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
Rollup of 6 pull requests
Successful merges:
- #153015 (core: make atomic primitives type aliases of `Atomic<T>`)
- #153046 (Couple of cg_ssa refactorings)
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
…uwer
Rollup of 6 pull requests
Successful merges:
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153046 (Couple of cg_ssa refactorings)
- #153090 (elf-raw-dylib: set type for functions)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
@rust-bors
rust-borsBot merged commit 44c7081 into rust-lang:mainMar 2, 2026
11 checks passed
@rustbotrustbot added this to the 1.96.0 milestone Mar 2, 2026
rust-timer added a commit that referenced this pull request Mar 2, 2026
Rollup merge of #152304 - pitaj:stabilize-new_range_api, r=tgross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: #125687
@tgross35tgross35 added the relnotes Marks issues that should be documented in the release notes of the next release. label Mar 2, 2026
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@pitaj@rustbot@tgross35@Amanieu
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Skip to content

stabilize new RangeToInclusive type - #152304

Merged
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api
Mar 2, 2026
Merged

stabilize new RangeToInclusive type#152304
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api

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@pitaj

@pitajpitaj commented Feb 7, 2026

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stabilizes core::range::RangeToInclusive

// in core::rangepubstructRangeToInclusive<Idx>{publast:Idx,}impl<Idx: fmt::Debug> fmt::DebugforRangeInclusive<Idx>{/* ... */}impl<Idx:PartialOrd<Idx>>RangeToInclusive<Idx>{pubconstfncontains<U>(&self,item:&U) -> boolwhereIdx:[const]PartialOrd<U>,U: ?Sized + [const]PartialOrd<Idx>;}impl<T> const RangeBounds<T>forRangeToInclusive<T>{/* ... */}impl<T>constRangeBounds<T>forRangeToInclusive<&T>{/* ... */}impl<T>constFrom<RangeToInclusive<T>>for legacy::RangeToInclusive<T>{/* ... */}impl<T>constFrom<legacy::RangeToInclusive<T>>forRangeToInclusive<T>{/* ... */}unsafeimpl<T>constSliceIndex<[T]>for range::RangeToInclusive<usize>{typeOutput = [T];/* ... */}unsafeimplconstSliceIndex<str>for range::RangeToInclusive<usize>{typeOutput = str;/* ... */}

Tracking issue: #125687

r? @tgross35

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 7, 2026
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I think there is a small change needed here but otherwise LGTM. However, I noticed there are some trait implementations missing compared to ops::RangeToInclusive:

  • OneSidedRange<T>
  • RangeBounds<T> for RangeToInclusive<&T> (currently has for RangeToInclusive<T>
  • SliceIndex<ByteStr> for RangeToInclusive<usize> (unstable)
  • SliceIndex<str> for RangeToInclusive<usize>

Would you mind putting up a PR adding those? We can re-nominate this for libs-api after.

View changes since this review

Comment threadlibrary/core/src/range.rs
@rustbotrustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 9, 2026
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Reminder, once the PR becomes ready for a review, use @rustbot ready.

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Index<RangeFrom<usize>> for CStr is also missing in the new RangeFrom

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@rustbot ready

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 14, 2026
Comment on lines +719 to +740
#[unstable(feature = "new_range_api", issue = "125687")]
impl ops::Index<range::RangeFrom<usize>> for CStr {
type Output = CStr;

#[inline]
fn index(&self, index: range::RangeFrom<usize>) -> &CStr {
let bytes = self.to_bytes_with_nul();
// we need to manually check the starting index to account for the null
// byte, since otherwise we could get an empty string that doesn't end
// in a null.
if index.start < bytes.len() {
// SAFETY: Non-empty tail of a valid `CStr` is still a valid `CStr`.
unsafe { CStr::from_bytes_with_nul_unchecked(&bytes[index.start..]) }
} else {
panic!(
"index out of bounds: the len is {} but the index is {}",
bytes.len(),
index.start
);
}
}
}

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This impl can probably forward to ops::RangeFrom so we don't have the same thing twice, or vice versa

@tgross35

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One note but otherwise the changes here LGTM. Nominating for libs-api to take a look because there are two new impls that weren't present for the FCP at #125687 (comment):

implRangeBounds<T>forRangeToInclusive<&T>{/* ... */}implSliceIndex<str>forRangeToInclusive<usize>{/* ... */}

These match up with what is present on the existing RangeToInclusive.

@rustbot label +I-libs-api-nominated

@rustbotrustbot added the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 16, 2026

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Everything here LGTM but it needs somebody from @rust-lang/libs-api to okay the above additions. I don't expect it to need a new FCP since they match the old RangeToInclusive.

Last two commits could be squashed.

View changes since this review

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We discussed this in the @rust-lang/libs-api meeting and we are happy with the added trait impls.

@AmanieuAmanieu removed the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 24, 2026
stabilizes `core::range::RangeToInclusive`
add missing trait impls for new RangeToInclusive
add missing trait impls for new RangeFrom
@pitaj
pitajforce-pushed the stabilize-new_range_api branch from 682fb44 to bc4ceadCompareMarch 1, 2026 04:46
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

@pitaj

pitaj commented Mar 1, 2026

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@rustbot ready

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📌 Commit bc4cead has been approved by tgross35

It is now in the queue for this repository.

@rust-borsrust-borsBot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 2, 2026
Comment on lines +700 to 703
// #[stable(feature = "new_range_to_inclusive_api", since = "CURRENT_RUSTC_VERSION")]
#[unstable(feature = "range_into_bounds", issue = "136903")]
#[rustc_const_unstable(feature = "const_range", issue = "none")]
impl<T> const IntoBounds<T> for RangeToInclusive<T> {

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Probably no need to have this comment, we can't have >1 #[stable] if range_into_bounds gets stabilized.

jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
Rollup of 6 pull requests
Successful merges:
- #153015 (core: make atomic primitives type aliases of `Atomic<T>`)
- #153046 (Couple of cg_ssa refactorings)
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
…uwer
Rollup of 6 pull requests
Successful merges:
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153046 (Couple of cg_ssa refactorings)
- #153090 (elf-raw-dylib: set type for functions)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
@rust-bors
rust-borsBot merged commit 44c7081 into rust-lang:mainMar 2, 2026
11 checks passed
@rustbotrustbot added this to the 1.96.0 milestone Mar 2, 2026
rust-timer added a commit that referenced this pull request Mar 2, 2026
Rollup merge of #152304 - pitaj:stabilize-new_range_api, r=tgross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: #125687
@tgross35tgross35 added the relnotes Marks issues that should be documented in the release notes of the next release. label Mar 2, 2026
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@pitaj@rustbot@tgross35@Amanieu
, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' stabilize new RangeToInclusive type by pitaj · Pull Request #152304 · rust-lang/rust · GitHub
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stabilize new RangeToInclusive type - #152304

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rust-bors[bot] merged 1 commit into
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pitaj:stabilize-new_range_api
Mar 2, 2026
Merged

stabilize new RangeToInclusive type#152304
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api

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@pitaj

@pitajpitaj commented Feb 7, 2026

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stabilizes core::range::RangeToInclusive

// in core::rangepubstructRangeToInclusive<Idx>{publast:Idx,}impl<Idx: fmt::Debug> fmt::DebugforRangeInclusive<Idx>{/* ... */}impl<Idx:PartialOrd<Idx>>RangeToInclusive<Idx>{pubconstfncontains<U>(&self,item:&U) -> boolwhereIdx:[const]PartialOrd<U>,U: ?Sized + [const]PartialOrd<Idx>;}impl<T> const RangeBounds<T>forRangeToInclusive<T>{/* ... */}impl<T>constRangeBounds<T>forRangeToInclusive<&T>{/* ... */}impl<T>constFrom<RangeToInclusive<T>>for legacy::RangeToInclusive<T>{/* ... */}impl<T>constFrom<legacy::RangeToInclusive<T>>forRangeToInclusive<T>{/* ... */}unsafeimpl<T>constSliceIndex<[T]>for range::RangeToInclusive<usize>{typeOutput = [T];/* ... */}unsafeimplconstSliceIndex<str>for range::RangeToInclusive<usize>{typeOutput = str;/* ... */}

Tracking issue: #125687

r? @tgross35

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 7, 2026
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I think there is a small change needed here but otherwise LGTM. However, I noticed there are some trait implementations missing compared to ops::RangeToInclusive:

  • OneSidedRange<T>
  • RangeBounds<T> for RangeToInclusive<&T> (currently has for RangeToInclusive<T>
  • SliceIndex<ByteStr> for RangeToInclusive<usize> (unstable)
  • SliceIndex<str> for RangeToInclusive<usize>

Would you mind putting up a PR adding those? We can re-nominate this for libs-api after.

View changes since this review

Comment threadlibrary/core/src/range.rs
@rustbotrustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 9, 2026
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Reminder, once the PR becomes ready for a review, use @rustbot ready.

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Index<RangeFrom<usize>> for CStr is also missing in the new RangeFrom

@pitaj

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@rustbot ready

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 14, 2026
Comment on lines +719 to +740
#[unstable(feature = "new_range_api", issue = "125687")]
impl ops::Index<range::RangeFrom<usize>> for CStr {
type Output = CStr;

#[inline]
fn index(&self, index: range::RangeFrom<usize>) -> &CStr {
let bytes = self.to_bytes_with_nul();
// we need to manually check the starting index to account for the null
// byte, since otherwise we could get an empty string that doesn't end
// in a null.
if index.start < bytes.len() {
// SAFETY: Non-empty tail of a valid `CStr` is still a valid `CStr`.
unsafe { CStr::from_bytes_with_nul_unchecked(&bytes[index.start..]) }
} else {
panic!(
"index out of bounds: the len is {} but the index is {}",
bytes.len(),
index.start
);
}
}
}

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This impl can probably forward to ops::RangeFrom so we don't have the same thing twice, or vice versa

@tgross35

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One note but otherwise the changes here LGTM. Nominating for libs-api to take a look because there are two new impls that weren't present for the FCP at #125687 (comment):

implRangeBounds<T>forRangeToInclusive<&T>{/* ... */}implSliceIndex<str>forRangeToInclusive<usize>{/* ... */}

These match up with what is present on the existing RangeToInclusive.

@rustbot label +I-libs-api-nominated

@rustbotrustbot added the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 16, 2026

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Everything here LGTM but it needs somebody from @rust-lang/libs-api to okay the above additions. I don't expect it to need a new FCP since they match the old RangeToInclusive.

Last two commits could be squashed.

View changes since this review

@Amanieu

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We discussed this in the @rust-lang/libs-api meeting and we are happy with the added trait impls.

@AmanieuAmanieu removed the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 24, 2026
stabilizes `core::range::RangeToInclusive`
add missing trait impls for new RangeToInclusive
add missing trait impls for new RangeFrom
@pitaj
pitajforce-pushed the stabilize-new_range_api branch from 682fb44 to bc4ceadCompareMarch 1, 2026 04:46
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

@pitaj

pitaj commented Mar 1, 2026

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@rustbot ready

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rust-borsBot commented Mar 2, 2026

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📌 Commit bc4cead has been approved by tgross35

It is now in the queue for this repository.

@rust-borsrust-borsBot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 2, 2026
Comment on lines +700 to 703
// #[stable(feature = "new_range_to_inclusive_api", since = "CURRENT_RUSTC_VERSION")]
#[unstable(feature = "range_into_bounds", issue = "136903")]
#[rustc_const_unstable(feature = "const_range", issue = "none")]
impl<T> const IntoBounds<T> for RangeToInclusive<T> {

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Probably no need to have this comment, we can't have >1 #[stable] if range_into_bounds gets stabilized.

jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
Rollup of 6 pull requests
Successful merges:
- #153015 (core: make atomic primitives type aliases of `Atomic<T>`)
- #153046 (Couple of cg_ssa refactorings)
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
…uwer
Rollup of 6 pull requests
Successful merges:
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153046 (Couple of cg_ssa refactorings)
- #153090 (elf-raw-dylib: set type for functions)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
@rust-bors
rust-borsBot merged commit 44c7081 into rust-lang:mainMar 2, 2026
11 checks passed
@rustbotrustbot added this to the 1.96.0 milestone Mar 2, 2026
rust-timer added a commit that referenced this pull request Mar 2, 2026
Rollup merge of #152304 - pitaj:stabilize-new_range_api, r=tgross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: #125687
@tgross35tgross35 added the relnotes Marks issues that should be documented in the release notes of the next release. label Mar 2, 2026
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relnotesMarks issues that should be documented in the release notes of the next release.S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.T-libsRelevant to the library team, which will review and decide on the PR/issue.

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4 participants

@pitaj@rustbot@tgross35@Amanieu
, 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' stabilize new RangeToInclusive type by pitaj · Pull Request #152304 · rust-lang/rust · GitHub
Skip to content

stabilize new RangeToInclusive type - #152304

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rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api
Mar 2, 2026
Merged

stabilize new RangeToInclusive type#152304
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api

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@pitaj

@pitajpitaj commented Feb 7, 2026

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stabilizes core::range::RangeToInclusive

// in core::rangepubstructRangeToInclusive<Idx>{publast:Idx,}impl<Idx: fmt::Debug> fmt::DebugforRangeInclusive<Idx>{/* ... */}impl<Idx:PartialOrd<Idx>>RangeToInclusive<Idx>{pubconstfncontains<U>(&self,item:&U) -> boolwhereIdx:[const]PartialOrd<U>,U: ?Sized + [const]PartialOrd<Idx>;}impl<T> const RangeBounds<T>forRangeToInclusive<T>{/* ... */}impl<T>constRangeBounds<T>forRangeToInclusive<&T>{/* ... */}impl<T>constFrom<RangeToInclusive<T>>for legacy::RangeToInclusive<T>{/* ... */}impl<T>constFrom<legacy::RangeToInclusive<T>>forRangeToInclusive<T>{/* ... */}unsafeimpl<T>constSliceIndex<[T]>for range::RangeToInclusive<usize>{typeOutput = [T];/* ... */}unsafeimplconstSliceIndex<str>for range::RangeToInclusive<usize>{typeOutput = str;/* ... */}

Tracking issue: #125687

r? @tgross35

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 7, 2026
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I think there is a small change needed here but otherwise LGTM. However, I noticed there are some trait implementations missing compared to ops::RangeToInclusive:

  • OneSidedRange<T>
  • RangeBounds<T> for RangeToInclusive<&T> (currently has for RangeToInclusive<T>
  • SliceIndex<ByteStr> for RangeToInclusive<usize> (unstable)
  • SliceIndex<str> for RangeToInclusive<usize>

Would you mind putting up a PR adding those? We can re-nominate this for libs-api after.

View changes since this review

Comment threadlibrary/core/src/range.rs
@rustbotrustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 9, 2026
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Reminder, once the PR becomes ready for a review, use @rustbot ready.

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Index<RangeFrom<usize>> for CStr is also missing in the new RangeFrom

@pitaj

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@rustbot ready

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 14, 2026
Comment on lines +719 to +740
#[unstable(feature = "new_range_api", issue = "125687")]
impl ops::Index<range::RangeFrom<usize>> for CStr {
type Output = CStr;

#[inline]
fn index(&self, index: range::RangeFrom<usize>) -> &CStr {
let bytes = self.to_bytes_with_nul();
// we need to manually check the starting index to account for the null
// byte, since otherwise we could get an empty string that doesn't end
// in a null.
if index.start < bytes.len() {
// SAFETY: Non-empty tail of a valid `CStr` is still a valid `CStr`.
unsafe { CStr::from_bytes_with_nul_unchecked(&bytes[index.start..]) }
} else {
panic!(
"index out of bounds: the len is {} but the index is {}",
bytes.len(),
index.start
);
}
}
}

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This impl can probably forward to ops::RangeFrom so we don't have the same thing twice, or vice versa

@tgross35

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One note but otherwise the changes here LGTM. Nominating for libs-api to take a look because there are two new impls that weren't present for the FCP at #125687 (comment):

implRangeBounds<T>forRangeToInclusive<&T>{/* ... */}implSliceIndex<str>forRangeToInclusive<usize>{/* ... */}

These match up with what is present on the existing RangeToInclusive.

@rustbot label +I-libs-api-nominated

@rustbotrustbot added the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 16, 2026

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Everything here LGTM but it needs somebody from @rust-lang/libs-api to okay the above additions. I don't expect it to need a new FCP since they match the old RangeToInclusive.

Last two commits could be squashed.

View changes since this review

@Amanieu

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We discussed this in the @rust-lang/libs-api meeting and we are happy with the added trait impls.

@AmanieuAmanieu removed the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 24, 2026
stabilizes `core::range::RangeToInclusive`
add missing trait impls for new RangeToInclusive
add missing trait impls for new RangeFrom
@pitaj
pitajforce-pushed the stabilize-new_range_api branch from 682fb44 to bc4ceadCompareMarch 1, 2026 04:46
@rustbot

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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

@pitaj

pitaj commented Mar 1, 2026

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@rustbot ready

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📌 Commit bc4cead has been approved by tgross35

It is now in the queue for this repository.

@rust-borsrust-borsBot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 2, 2026
Comment on lines +700 to 703
// #[stable(feature = "new_range_to_inclusive_api", since = "CURRENT_RUSTC_VERSION")]
#[unstable(feature = "range_into_bounds", issue = "136903")]
#[rustc_const_unstable(feature = "const_range", issue = "none")]
impl<T> const IntoBounds<T> for RangeToInclusive<T> {

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Probably no need to have this comment, we can't have >1 #[stable] if range_into_bounds gets stabilized.

jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
Rollup of 6 pull requests
Successful merges:
- #153015 (core: make atomic primitives type aliases of `Atomic<T>`)
- #153046 (Couple of cg_ssa refactorings)
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
…uwer
Rollup of 6 pull requests
Successful merges:
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153046 (Couple of cg_ssa refactorings)
- #153090 (elf-raw-dylib: set type for functions)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
@rust-bors
rust-borsBot merged commit 44c7081 into rust-lang:mainMar 2, 2026
11 checks passed
@rustbotrustbot added this to the 1.96.0 milestone Mar 2, 2026
rust-timer added a commit that referenced this pull request Mar 2, 2026
Rollup merge of #152304 - pitaj:stabilize-new_range_api, r=tgross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: #125687
@tgross35tgross35 added the relnotes Marks issues that should be documented in the release notes of the next release. label Mar 2, 2026
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@pitaj@rustbot@tgross35@Amanieu
, 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' stabilize new RangeToInclusive type by pitaj · Pull Request #152304 · rust-lang/rust · GitHub
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stabilize new RangeToInclusive type - #152304

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rust-lang:mainfrom
pitaj:stabilize-new_range_api
Mar 2, 2026
Merged

stabilize new RangeToInclusive type#152304
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api

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@pitaj

@pitajpitaj commented Feb 7, 2026

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stabilizes core::range::RangeToInclusive

// in core::rangepubstructRangeToInclusive<Idx>{publast:Idx,}impl<Idx: fmt::Debug> fmt::DebugforRangeInclusive<Idx>{/* ... */}impl<Idx:PartialOrd<Idx>>RangeToInclusive<Idx>{pubconstfncontains<U>(&self,item:&U) -> boolwhereIdx:[const]PartialOrd<U>,U: ?Sized + [const]PartialOrd<Idx>;}impl<T> const RangeBounds<T>forRangeToInclusive<T>{/* ... */}impl<T>constRangeBounds<T>forRangeToInclusive<&T>{/* ... */}impl<T>constFrom<RangeToInclusive<T>>for legacy::RangeToInclusive<T>{/* ... */}impl<T>constFrom<legacy::RangeToInclusive<T>>forRangeToInclusive<T>{/* ... */}unsafeimpl<T>constSliceIndex<[T]>for range::RangeToInclusive<usize>{typeOutput = [T];/* ... */}unsafeimplconstSliceIndex<str>for range::RangeToInclusive<usize>{typeOutput = str;/* ... */}

Tracking issue: #125687

r? @tgross35

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 7, 2026
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I think there is a small change needed here but otherwise LGTM. However, I noticed there are some trait implementations missing compared to ops::RangeToInclusive:

  • OneSidedRange<T>
  • RangeBounds<T> for RangeToInclusive<&T> (currently has for RangeToInclusive<T>
  • SliceIndex<ByteStr> for RangeToInclusive<usize> (unstable)
  • SliceIndex<str> for RangeToInclusive<usize>

Would you mind putting up a PR adding those? We can re-nominate this for libs-api after.

View changes since this review

Comment threadlibrary/core/src/range.rs
@rustbotrustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 9, 2026
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Reminder, once the PR becomes ready for a review, use @rustbot ready.

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Index<RangeFrom<usize>> for CStr is also missing in the new RangeFrom

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@rustbot ready

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 14, 2026
Comment on lines +719 to +740
#[unstable(feature = "new_range_api", issue = "125687")]
impl ops::Index<range::RangeFrom<usize>> for CStr {
type Output = CStr;

#[inline]
fn index(&self, index: range::RangeFrom<usize>) -> &CStr {
let bytes = self.to_bytes_with_nul();
// we need to manually check the starting index to account for the null
// byte, since otherwise we could get an empty string that doesn't end
// in a null.
if index.start < bytes.len() {
// SAFETY: Non-empty tail of a valid `CStr` is still a valid `CStr`.
unsafe { CStr::from_bytes_with_nul_unchecked(&bytes[index.start..]) }
} else {
panic!(
"index out of bounds: the len is {} but the index is {}",
bytes.len(),
index.start
);
}
}
}

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This impl can probably forward to ops::RangeFrom so we don't have the same thing twice, or vice versa

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One note but otherwise the changes here LGTM. Nominating for libs-api to take a look because there are two new impls that weren't present for the FCP at #125687 (comment):

implRangeBounds<T>forRangeToInclusive<&T>{/* ... */}implSliceIndex<str>forRangeToInclusive<usize>{/* ... */}

These match up with what is present on the existing RangeToInclusive.

@rustbot label +I-libs-api-nominated

@rustbotrustbot added the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 16, 2026

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Everything here LGTM but it needs somebody from @rust-lang/libs-api to okay the above additions. I don't expect it to need a new FCP since they match the old RangeToInclusive.

Last two commits could be squashed.

View changes since this review

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We discussed this in the @rust-lang/libs-api meeting and we are happy with the added trait impls.

@AmanieuAmanieu removed the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 24, 2026
stabilizes `core::range::RangeToInclusive`
add missing trait impls for new RangeToInclusive
add missing trait impls for new RangeFrom
@pitaj
pitajforce-pushed the stabilize-new_range_api branch from 682fb44 to bc4ceadCompareMarch 1, 2026 04:46
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

@pitaj

pitaj commented Mar 1, 2026

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@rustbot ready

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rust-borsBot commented Mar 2, 2026

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📌 Commit bc4cead has been approved by tgross35

It is now in the queue for this repository.

@rust-borsrust-borsBot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 2, 2026
Comment on lines +700 to 703
// #[stable(feature = "new_range_to_inclusive_api", since = "CURRENT_RUSTC_VERSION")]
#[unstable(feature = "range_into_bounds", issue = "136903")]
#[rustc_const_unstable(feature = "const_range", issue = "none")]
impl<T> const IntoBounds<T> for RangeToInclusive<T> {

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Probably no need to have this comment, we can't have >1 #[stable] if range_into_bounds gets stabilized.

jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
Rollup of 6 pull requests
Successful merges:
- #153015 (core: make atomic primitives type aliases of `Atomic<T>`)
- #153046 (Couple of cg_ssa refactorings)
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
…uwer
Rollup of 6 pull requests
Successful merges:
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153046 (Couple of cg_ssa refactorings)
- #153090 (elf-raw-dylib: set type for functions)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
@rust-bors
rust-borsBot merged commit 44c7081 into rust-lang:mainMar 2, 2026
11 checks passed
@rustbotrustbot added this to the 1.96.0 milestone Mar 2, 2026
rust-timer added a commit that referenced this pull request Mar 2, 2026
Rollup merge of #152304 - pitaj:stabilize-new_range_api, r=tgross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: #125687
@tgross35tgross35 added the relnotes Marks issues that should be documented in the release notes of the next release. label Mar 2, 2026
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@pitaj@rustbot@tgross35@Amanieu
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stabilize new RangeToInclusive type - #152304

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rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api
Mar 2, 2026
Merged

stabilize new RangeToInclusive type#152304
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
pitaj:stabilize-new_range_api

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@pitajpitaj commented Feb 7, 2026

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stabilizes core::range::RangeToInclusive

// in core::rangepubstructRangeToInclusive<Idx>{publast:Idx,}impl<Idx: fmt::Debug> fmt::DebugforRangeInclusive<Idx>{/* ... */}impl<Idx:PartialOrd<Idx>>RangeToInclusive<Idx>{pubconstfncontains<U>(&self,item:&U) -> boolwhereIdx:[const]PartialOrd<U>,U: ?Sized + [const]PartialOrd<Idx>;}impl<T> const RangeBounds<T>forRangeToInclusive<T>{/* ... */}impl<T>constRangeBounds<T>forRangeToInclusive<&T>{/* ... */}impl<T>constFrom<RangeToInclusive<T>>for legacy::RangeToInclusive<T>{/* ... */}impl<T>constFrom<legacy::RangeToInclusive<T>>forRangeToInclusive<T>{/* ... */}unsafeimpl<T>constSliceIndex<[T]>for range::RangeToInclusive<usize>{typeOutput = [T];/* ... */}unsafeimplconstSliceIndex<str>for range::RangeToInclusive<usize>{typeOutput = str;/* ... */}

Tracking issue: #125687

r? @tgross35

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Feb 7, 2026
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I think there is a small change needed here but otherwise LGTM. However, I noticed there are some trait implementations missing compared to ops::RangeToInclusive:

  • OneSidedRange<T>
  • RangeBounds<T> for RangeToInclusive<&T> (currently has for RangeToInclusive<T>
  • SliceIndex<ByteStr> for RangeToInclusive<usize> (unstable)
  • SliceIndex<str> for RangeToInclusive<usize>

Would you mind putting up a PR adding those? We can re-nominate this for libs-api after.

View changes since this review

Comment threadlibrary/core/src/range.rs
@rustbotrustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 9, 2026
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Reminder, once the PR becomes ready for a review, use @rustbot ready.

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Index<RangeFrom<usize>> for CStr is also missing in the new RangeFrom

@pitaj

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@rustbot ready

@rustbotrustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 14, 2026
Comment on lines +719 to +740
#[unstable(feature = "new_range_api", issue = "125687")]
impl ops::Index<range::RangeFrom<usize>> for CStr {
type Output = CStr;

#[inline]
fn index(&self, index: range::RangeFrom<usize>) -> &CStr {
let bytes = self.to_bytes_with_nul();
// we need to manually check the starting index to account for the null
// byte, since otherwise we could get an empty string that doesn't end
// in a null.
if index.start < bytes.len() {
// SAFETY: Non-empty tail of a valid `CStr` is still a valid `CStr`.
unsafe { CStr::from_bytes_with_nul_unchecked(&bytes[index.start..]) }
} else {
panic!(
"index out of bounds: the len is {} but the index is {}",
bytes.len(),
index.start
);
}
}
}

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This impl can probably forward to ops::RangeFrom so we don't have the same thing twice, or vice versa

@tgross35

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One note but otherwise the changes here LGTM. Nominating for libs-api to take a look because there are two new impls that weren't present for the FCP at #125687 (comment):

implRangeBounds<T>forRangeToInclusive<&T>{/* ... */}implSliceIndex<str>forRangeToInclusive<usize>{/* ... */}

These match up with what is present on the existing RangeToInclusive.

@rustbot label +I-libs-api-nominated

@rustbotrustbot added the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 16, 2026

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Everything here LGTM but it needs somebody from @rust-lang/libs-api to okay the above additions. I don't expect it to need a new FCP since they match the old RangeToInclusive.

Last two commits could be squashed.

View changes since this review

@Amanieu

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We discussed this in the @rust-lang/libs-api meeting and we are happy with the added trait impls.

@AmanieuAmanieu removed the I-libs-api-nominated [DEPRECATED; DO NOT USE] label Feb 24, 2026
stabilizes `core::range::RangeToInclusive`
add missing trait impls for new RangeToInclusive
add missing trait impls for new RangeFrom
@pitaj
pitajforce-pushed the stabilize-new_range_api branch from 682fb44 to bc4ceadCompareMarch 1, 2026 04:46
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

@pitaj

pitaj commented Mar 1, 2026

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@rustbot ready

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@rust-bors

rust-borsBot commented Mar 2, 2026

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📌 Commit bc4cead has been approved by tgross35

It is now in the queue for this repository.

@rust-borsrust-borsBot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 2, 2026
Comment on lines +700 to 703
// #[stable(feature = "new_range_to_inclusive_api", since = "CURRENT_RUSTC_VERSION")]
#[unstable(feature = "range_into_bounds", issue = "136903")]
#[rustc_const_unstable(feature = "const_range", issue = "none")]
impl<T> const IntoBounds<T> for RangeToInclusive<T> {

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Probably no need to have this comment, we can't have >1 #[stable] if range_into_bounds gets stabilized.

jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
Rollup of 6 pull requests
Successful merges:
- #153015 (core: make atomic primitives type aliases of `Atomic<T>`)
- #153046 (Couple of cg_ssa refactorings)
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
jhpratt added a commit to jhpratt/rust that referenced this pull request Mar 2, 2026
…gross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: rust-lang#125687
@jhprattjhpratt mentioned this pull request Mar 2, 2026
rust-borsBot pushed a commit that referenced this pull request Mar 2, 2026
…uwer
Rollup of 6 pull requests
Successful merges:
- #153169 (Various small query cleanups)
- #152304 (stabilize new RangeToInclusive type)
- #153046 (Couple of cg_ssa refactorings)
- #153090 (elf-raw-dylib: set type for functions)
- #153225 (tests/ui/asm: add annotations for reference rules)
- #153233 (test: add regression test for fuzzy_provenance_casts lint ICE)
@rust-bors
rust-borsBot merged commit 44c7081 into rust-lang:mainMar 2, 2026
11 checks passed
@rustbotrustbot added this to the 1.96.0 milestone Mar 2, 2026
rust-timer added a commit that referenced this pull request Mar 2, 2026
Rollup merge of #152304 - pitaj:stabilize-new_range_api, r=tgross35
stabilize new RangeToInclusive type
stabilizes `core::range::RangeToInclusive`
```rust
// in core::range
pub struct RangeToInclusive<Idx> {
pub last: Idx,
}
impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ }
impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
pub const fn contains<U>(&self, item: &U) -> bool
where
Idx: [const] PartialOrd<U>,
U: ?Sized + [const] PartialOrd<Idx>;
}
impl<T> const RangeBounds<T> for RangeToInclusive<T> { /* ... */ }
impl<T> const RangeBounds<T> for RangeToInclusive<&T> { /* ... */ }
impl<T> const From<RangeToInclusive<T>> for legacy::RangeToInclusive<T> { /* ... */ }
impl<T> const From<legacy::RangeToInclusive<T>> for RangeToInclusive<T> { /* ... */ }
unsafe impl<T> const SliceIndex<[T]> for range::RangeToInclusive<usize> {
type Output = [T];
/* ... */
}
unsafe impl const SliceIndex<str> for range::RangeToInclusive<usize> {
type Output = str;
/* ... */
}
```
Tracking issue: #125687
@tgross35tgross35 added the relnotes Marks issues that should be documented in the release notes of the next release. label Mar 2, 2026
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