add Vec::push_within_capacity - fallible, does not allocate
This method can serve several purposes. It
* is fallible
* guarantees that items in Vec aren't moved
* allows loops that do `reserve` and `push` separately to avoid pulling in the allocation machinery a second time in the `push` part which should make things easier on the optimizer
* eases the path towards `ArrayVec` a bit since - compared to `push()` - there are fewer questions around how it should be implemented
I haven't named it `try_push` because that should probably occupy a middle ground that will still try to reserve and only return an error in the unlikely OOM case.
resolves#84649
VS Code problem matcher are restricted to be static "regexes". You can't
create a problem matcher dynamically, and you can't use custom code in
lieu of problem matcher.
This creates a problem for rust/cargo compiler errors. They use paths
relative to the root of the Cargo workspace, but VS Code doesn't
necessary know where that root is.
Luckily, there's a way out: our current problem matcher is defined like
this:
"fileLocation": [ "autoDetect", "${workspaceRoot}" ],
That means that relative pahts would be resoleved relative to workspace
root. VS Code allows to specify a command inside `${}`. So we can plug
custom logic there to fetch Cargo's workspace root!
And that's exactly what this PR is doing!
internal: ⬆️ xflags
The main change here should be that flags are not inhereted, so
$ rust-analyzer analysis-stats . -v -v
would do what it should do
We also no longer Don\'t
The main change here should be that flags are not inhereted, so
$ rust-analyzer analysis-stats . -v -v
would do what it should do
We also no longer Don\'t
std: use futex in `Once`
Now that we have efficient locks, let's optimize the rest of `sync` as well. This PR adds a futex-based implementation for `Once`, which drastically simplifies the implementation compared to the generic version, which is provided as fallback for platforms without futex (Windows only supports them on newer versions, so it uses the fallback for now).
Instead of storing a linked list of waiters, the new implementation adds another state (`QUEUED`), which is set when there are waiting threads. These now use `futex_wait` on that state and are woken by the running thread when it finishes and notices the `QUEUED` state, thereby avoiding unnecessary calls to `futex_wake_all`.
fix: Make go-to-def work for `#[doc = include_str!("path")]`
See the added test, go-to-def on `#[doc = include_str!("path$0")]` should navigate to `path`.
minor: Fix go-to-def for shadowed `include*!`
Add a check in go-to-def feature, so that we don't assume any macro named `include`/`include_str`/`include_bytes` is the builtin one.
Miri sync
This is a Miri sync created with my experimental fork of josh. We should probably not merge this yet, but we can use this to check if the sync looks the way it should.
r? `@oli-obk`
Fix unwind drop glue for if-then scopes
cc `@est31`
Fix#102317Fix#99852
This PR fixes the drop glue for unwinding from a panic originated in a drop while breaking out for the else block in an `if-then` scope.
MIR validation does not fail for the synchronous versions of the test program, because `StorageDead` statements are skipped over in the unwinding process. It is only becoming a problem when it is inside a generator where `StorageDead` must be kept around.
Adding target_rustcflags to `compiletest` TargetCfg creation
Adjustment to https://github.com/rust-lang/rust/pull/102134, ensures config returned by `rustc --target foo --print cfg` accurately reflects rustflags passed via `target_rustcflags`.
Fixes breaking change of not correctly handling `x.py test ... --test-args "--target-rustcflags -Cpanic=abort --target-rustcflags -Zpanic_abort_tests"`
cc `@djkoloski`
Add `AsFd` implementations for stdio lock types on WASI.
This mirrors the implementations on Unix platforms, and also mirrors the existing `AsRawFd` impls.
This is similar to #100892, but is for the `*Lock` types.
fix: use `BoundVar`s from current generic scope
Fixup for #13335, addresses https://github.com/rust-lang/rust-analyzer/pull/13339#issuecomment-1266654607
Before the change in generic parameter order, `BoundVar`s for trait reference didn't change whether you are in an impl's scope or in an associated item's scope. Now that item's generic params come before its parent's, we need to shift their indices when we are in an associated item's scope.
Move layout_of and friends from rustc_middle to rustc_ty_utils
Breaks up the very large module that is `rustc_middle::ty::layout` by fork-lifting some queries into `rustc_ty_utils::{abi, layout}`.
This does set back `rustc_ty_utils` to having untranslatable diagnostics. I'd like to leave this as a separate task.
fix: treat enum variants as generic item on their own
Fixup for #13335
It turns out I tried to merge two procedures into one utility function without noticing the incompatibility.
This time I *did* run analysis-stats on the four crates and confirmed it doesn't crash and this patch doesn't cause regression.
re-add git-commit-hash file to tarballs
rust-lang/rust#100557 removed the `git-commit-hash` file and replaced it with `git-commit-info`. However, build-manifest relies on the `git-commit-hash` file being present, so this adds it back.
r? `@Mark-Simulacrum`
internal: change generic parameter order
tl;dr: This PR changes the `Substitution` for trait items and methods like so:
```rust
trait Trait<TP, const CP: usize> { // note the implicit Self as first parameter
type Type<TC, const CC: usize>;
fn f<TC, const CC: usize>() {}
}
impl<TP, const CP: usize> S {
fn f<TC, const CC: usize>() {}
}
```
- before this PR: `[Self, TP, CP, TC, CC]` for each trait item, `[TP, CP, TC, CC]` for `S::f`
- after this PR: `[TC, CC, Self, TP, CP]` for each trait item, `[TC, CC, TP, CP]` for `S::f`
---
This PR "inverts" the generic parameters/arguments of an item and its parent. This is to fulfill [chalk's expectation](d875af0ff1/chalk-solve/src/rust_ir.rs (L498-L502)) on the order of generic arguments in `Substitution`s for generic associated types and it's one step forward for GATs support (hopefully). Although chalk doesn't put any constraint for other items, it feels more natural to get everything aligned than special casing GATs.
One complication is that `TyBuilder` now demands its users to pass in parent's `Substitution` upon construction unless it's obvious that the the item has no parent (e.g. an ADT never has parent). All users *should* already know the parent of the item in question, and without this, it cannot be easily reasoned about whether we're pushing the argument for the item or for its parent.
Some additional notes:
- f8f5a5ea57: This isn't related to the change, but I felt it's nicer.
- 78977cd86c: There's one major change here other than the generic param order: Default arguments are now bound by the same `Binder` as the item in question rather than a `Binder` limited to parameters they can refer to (i.e. arguments that syntactically appear before them). Now that the order of generic parameters is changed, it would be somewhat complicated to make such `Binder`s as before, and the "full" `Binder`s shouldn't be a problem because we already make sure that the default arguments don't refer to the generic arguments after them with `fallback_bound_vars()`.
- 7556f74b16: This is split from 4385d3dcd0 to make it easy to revert if it turns out that the GATs with const generics panic is actually not resolved with this PR. cc #11878#11957
