Do not use "nil" to refer to `()`
"nil" is not used in the [book](https://doc.rust-lang.org/book) or in the [standard library](https://doc.rust-lang.org/std) anywhere else. Because "nil" is often used in programming languages to refer to "None" or "null" I think it could be a little confusing for newcomers to see this type referred to as "nil".
Keep track of position when deleting from a BTreeMap
This improves the performance of drain_filter and is needed for future Cursor support for BTreeMap.
cc @ssomers
r? @Mark-Simulacrum
Don't import integer and float modules, use assoc consts
Stop importing the standard library integer and float modules to reach the `MIN`, `MAX` and other constants. They are available directly on the primitive types now.
This PR is a follow up of #69860 which made sure we use the new constants in documentation.
This type of change touches a lot of files, and previously all my assoc int consts PRs had collisions and were accepted only after a long delay. So I'd prefer to do it in smaller steps now. Just removing these imports seem like a good next step.
r? @dtolnay
Query-ify Instance::resolve
Split off from #65989
Instance::resolve is now a wrapper for a new `resolve_instance` query.
This greatly improves performance on several benchmarks
clarify comment in RawVec::into_box
On first reading I almost thought "len <= cap" would be all that there is to check here. Expand the comment to clarify that that is not the case.
Fix some aliasing issues in Vec
`Vec::extend` and `Vec::truncate` invalidated references into the vector even without reallocation, because they (implicitly) created a mutable reference covering the *entire* initialized part of the vector.
Fixes https://github.com/rust-lang/rust/issues/70301
I verified the fix by adding some new tests here that I ran in Miri.
Fix performance regression in debuginfo file_metadata.
Fixes performance regression caused by #69718.
Finding the `SourceFile` associated with a `FileName` called `get_source_file` on the `SourceMap`, which does a linear search through all files in the `SourceMap`.
This resolves the issue by passing the `SourceFile` in from the caller (which already had it available) instead of the `FileName`
Fixes#70785.
Finding the `SourceFile` associated with a `FileName` called `get_source_file` on
the `SourceMap`, which does a linear search through all files in the `SourceMap`.
This resolves the issue by passing the SourceFile in from the caller (which already
had it available).
Rollup of 6 pull requests
Successful merges:
- #70635 (rustc_target: Some cleanup to `no_default_libraries`)
- #70748 (Do not disable field reordering on enums with big discriminant)
- #70752 (Add slice::fill)
- #70766 (use ManuallyDrop instead of forget inside collections)
- #70768 (macro_rules: `NtLifetime` cannot start with an identifier)
- #70783 (comment refers to removed type)
Failed merges:
r? @ghost
