Add an intrinsic for `ptr::from_raw_parts(_mut)`
Fixes#123174
cc `@CAD97` `@saethlin`
r? `@cjgillot`
As suggested in https://github.com/rust-lang/rust/pull/123190#issuecomment-2028717967, this adds a new `AggregateKind::RawPtr` for creating a pointer from its data pointer and its metadata.
That means that `slice::from_raw_parts` and friends no longer need to hard-code pointer layout into `libcore`, and because it no longer does union hacks the MIR is shorter and more amenable to optimizations.
fix normalizing in different `ParamEnv`s with the same `InferCtxt`
This PR changes the key of the projection cache from just `AliasTy` to `(AliasTy, ParamEnv)` to allow normalizing in different `ParamEnv`s without resetting caches. Previously, normalizing the same alias in different param envs would always reuse the cached result from the first normalization, which is incorrect if the projection clauses in the param env have changed.
Fixing this bug allows us to get rid of `InferCtxt::clear_caches`, which was only used by the `AutoTraitFinder`, because it requires normalizing in different param envs.
r? `@fmease`
Fix trait solver overflow with `non_local_definitions` lint
This PR fixes the trait solver overflow with the `non_local_definitions` lint reported in https://github.com/rust-lang/rust/issues/123573 using the suggestion from `@lcnr:` https://github.com/rust-lang/rust/issues/123573#issuecomment-2041348320 to use the next trait solver.
~~I have not (yet) tried to create a minimized repro~~ ``@compiler-errors`` did the minimization (thanks you) but I have manually tested on the `starlark-rust` project that it fixes the issue.
Fixes#123573
r? `@lcnr`
Flip spans for precise capturing syntax not capturing a ty/const param, and for implicit captures of lifetime params
Make the primary span point to the opaque, rather than the param which might be very far away (e.g. in an impl header hundreds of lines above).
Give a name to each distinct manipulation of pretty-printer FixupContext
There are only 7 distinct ways that the AST pretty-printer interacts with FixupContext: 3 constructors (including Default), 2 transformations, and 2 queries.
This PR turns these into associated functions which can be documented with examples.
This PR unblocks https://github.com/rust-lang/rust/pull/119427#discussion_r1439481201. In order to improve the pretty-printer's behavior regarding parenthesization of braced macro calls in match arms, which have different grammar than macro calls in statements, FixupContext needs to be extended with 2 new fields. In the previous approach, that would be onerous. In the new approach, all it entails is 1 new constructor (`FixupContext::new_match_arm()`).
This handles using deref patterns to choose the correct match arm. This
does not handle bindings or guards.
Co-authored-by: Deadbeef <ent3rm4n@gmail.com>
PatRangeBoundary::compare_with: als add a fast-path for signed integers
Not sure if we have a benchmark that hits this... but it seems odd to only do this for unsigned integers.
