Instead of using AST pretty printing.

This is a step towards removing `token::Interpolated`, which will
eventually (in rust-lang#124141) be replaced with a token stream within invisible
delimiters.

This changes (improves) the output of the `stringify!` macro in some
cases. This is allowed. As the `stringify!` docs say: "Note that the
expanded results of the input tokens may change in the future. You
should be careful if you rely on the output."

Test changes:

- tests/ui/macros/stringify.rs: this used to test both token stream
  pretty printing and AST pretty printing via different ways of invoking
  of `stringify!` (i.e. `$expr` vs `$tt`). But those two different
  invocations now give the same result, which is a nice consistency
  improvement. This removes the need for the `c2!` macro.

- tests/ui/macros/trace_faulty_macros.rs: there is some sub-optimal
  spacing in the printing of `A { a : a, b : 0, c : _, .. }`, which will
  be fixed in the next commit. The spacing of `1+1` improves -- it now
  matches the formatting in the source code.

- tests/ui/proc-macro/*: minor improvements where small differences
  between `INPUT (DISPLAY)` output and `DEEP-RE-COLLECTED (DISPLAY)`
  output disappear.

Instead of using AST pretty printing.

This is a step towards removing `token::Interpolated`, which will
eventually (in rust-lang#124141) be replaced with a token stream within invisible
delimiters.

This changes (improves) the output of the `stringify!` macro in some
cases. This is allowed. As the `stringify!` docs say: "Note that the
expanded results of the input tokens may change in the future. You
should be careful if you rely on the output."

Test changes:

- tests/ui/macros/stringify.rs: this used to test both token stream
  pretty printing and AST pretty printing via different ways of invoking
  of `stringify!` (i.e. `$expr` vs `$tt`). But those two different
  invocations now give the same result, which is a nice consistency
  improvement. This removes the need for the `c2!` macro.

- tests/ui/macros/trace_faulty_macros.rs: there is some sub-optimal
  spacing in the printing of `A { a : a, b : 0, c : _, .. }`, which will
  be fixed in the next commit. The spacing of `1+1` improves -- it now
  matches the formatting in the source code.

- tests/ui/proc-macro/*: minor improvements where small differences
  between `INPUT (DISPLAY)` output and `DEEP-RE-COLLECTED (DISPLAY)`
  output disappear.

…, r=<try>

Print `token::Interpolated` with token stream pretty printing.

This is a step towards removing `token::Interpolated` (rust-lang#124141). It unavoidably changes the output of the `stringify!` macro, generally for the better.

r? `@petrochenkov`

Add tests for `-Zunpretty=expanded` ported from stringify's tests

This PR adds a new set of tests for the AST pretty-printer.

Previously, pretty-printer edge cases were tested by way of `stringify!` in [tests/ui/macros/stringify.rs](https://github.com/rust-lang/rust/blob/1.78.0/tests/ui/macros/stringify.rs), such as the tests added by rust-lang@419b269 and rust-lang@527e2ea.

Those tests will no longer provide effective coverage of the AST pretty-printer after rust-lang#124141. `Nonterminal` and `TokenKind::Interpolated` are being removed, and a consequence is that `stringify!` will perform token stream pretty printing, instead of AST pretty printing, in all of the `stringify!` cases including $:expr and all other interpolations.

This PR adds 2 new ui tests with `compile-flags: -Zunpretty=expanded`:

- **tests/ui/unpretty/expanded-exhaustive.rs** — this test aims for exhaustive coverage of all the variants of `ExprKind`, `ItemKind`, `PatKind`, `StmtKind`, `TyKind`, and `VisibilityKind`. Some parts could use being fleshed out further, but the current state is roughly on par with what exists in the old stringify-based tests.

- **tests/ui/unpretty/expanded-interpolation.rs** — this test covers tricky macro metavariable edge cases that require the AST pretty printer to synthesize parentheses in order for the printed code to be valid Rust syntax.

r? `@nnethercote`

Rollup merge of rust-lang#125236 - dtolnay:expandtest, r=nnethercote

Add tests for `-Zunpretty=expanded` ported from stringify's tests

This PR adds a new set of tests for the AST pretty-printer.

Previously, pretty-printer edge cases were tested by way of `stringify!` in [tests/ui/macros/stringify.rs](https://github.com/rust-lang/rust/blob/1.78.0/tests/ui/macros/stringify.rs), such as the tests added by rust-lang@419b269 and rust-lang@527e2ea.

Those tests will no longer provide effective coverage of the AST pretty-printer after rust-lang#124141. `Nonterminal` and `TokenKind::Interpolated` are being removed, and a consequence is that `stringify!` will perform token stream pretty printing, instead of AST pretty printing, in all of the `stringify!` cases including $:expr and all other interpolations.

This PR adds 2 new ui tests with `compile-flags: -Zunpretty=expanded`:

- **tests/ui/unpretty/expanded-exhaustive.rs** — this test aims for exhaustive coverage of all the variants of `ExprKind`, `ItemKind`, `PatKind`, `StmtKind`, `TyKind`, and `VisibilityKind`. Some parts could use being fleshed out further, but the current state is roughly on par with what exists in the old stringify-based tests.

- **tests/ui/unpretty/expanded-interpolation.rs** — this test covers tricky macro metavariable edge cases that require the AST pretty printer to synthesize parentheses in order for the printed code to be valid Rust syntax.

r? `@nnethercote`

Instead of using AST pretty printing.

This is a step towards removing `token::Interpolated`, which will
eventually (in rust-lang#124141) be replaced with a token stream within invisible
delimiters.

This changes (improves) the output of the `stringify!` macro in some
cases. This is allowed. As the `stringify!` docs say: "Note that the
expanded results of the input tokens may change in the future. You
should be careful if you rely on the output."

Test changes:

- tests/ui/macros/stringify.rs: this used to test both token stream
  pretty printing and AST pretty printing via different ways of invoking
  of `stringify!` (i.e. `$expr` vs `$tt`). But those two different
  invocations now give the same result, which is a nice consistency
  improvement. This removes the need for all the `c2*` macros. The AST
  pretty printer now has more thorough testing thanks to rust-lang#125236.

- tests/ui/proc-macro/*: minor improvements where small differences
  between `INPUT (DISPLAY)` output and `DEEP-RE-COLLECTED (DISPLAY)`
  output disappear.

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

ast: Remove token visiting from AST visitor

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

r? `@nnethercote`

Rollup merge of rust-lang#140450 - petrochenkov:vistok, r=nnethercote

ast: Remove token visiting from AST visitor

It's no longer necessary after the removal of nonterminal tokens in rust-lang#124141.

r? `@nnethercote`

…olated_BETA, r=nnethercote

[beta] [also fit for beta rollup] [HOTFIX] Don't delay a bug on malformed meta items involving interpolated tokens

Directly fixes rust-lang#140612.

<details><summary>Outdated Information</summary>

Directly fixes the 3 crater regressions reported in rust-lang#137687 (comment) (NB: The containing issue rust-lang#137687 is in fact *not* an instance of these regressions, see rust-lang#137687 (comment)).

</details>

**Why is this a separate PR for `beta`**? Well, the crater regressions were already fixed on master albeit unintentionally so, namely by PR rust-lang#124141 which we **certainly** don't want to backport! So this is simply a hotfix. PR rust-lang#140584 will then provide the regression test for master, too, so it doesn't get 'lost'.

[`@]T-release,` if/once accepted by T-compiler, this PR will be fit for beta rollup and can be cherry-picked.

<details><summary>Slightly Outdated & Irrelevant Information</summary>

FYI, we may also want to (separately) backport PR rust-lang#140584 to [fix] rust-lang#137687 (which, again, is not an instance of the crater regressions) but it's unclear if it's really necessary (since it's fuzzer-generated and I don't know of any real users who are impacted).

</details>

cc `@jdonszelmann`
r? fmease

This MR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [rust](https://github.com/rust-lang/rust) | minor | `1.86.0` -> `1.87.0` |

MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot).

**Proposed changes to behavior should be submitted there as MRs.**

---

### Release Notes

<details>
<summary>rust-lang/rust (rust)</summary>

### [`v1.87.0`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1870-2025-05-15)

[Compare Source](rust-lang/rust@1.86.0...1.87.0)

\==========================

<a id="1.87.0-Language"></a>

## Language

-   [Stabilize `asm_goto` feature](rust-lang/rust#133870)
-   [Allow parsing open beginning ranges (`..EXPR`) after unary operators `!`, `-`, and `*`](rust-lang/rust#134900).
-   [Don't require method impls for methods with `Self: Sized` bounds in `impl`s for unsized types](rust-lang/rust#135480)
-   [Stabilize `feature(precise_capturing_in_traits)` allowing `use<...>` bounds on return position `impl Trait` in `trait`s](rust-lang/rust#138128)

<a id="1.87.0-Compiler"></a>

## Compiler

-   [x86: make SSE2 required for i686 targets and use it to pass SIMD types](rust-lang/rust#135408)

<a id="1.87.0-Platform-Support"></a>

## Platform Support

-   [Remove `i586-pc-windows-msvc` target](rust-lang/rust#137957)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

[platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html

<a id="1.87.0-Libraries"></a>

## Libraries

-   [Stabilize the anonymous pipe API](rust-lang/rust#127154)
-   [Add support for unbounded left/right shift operations](rust-lang/rust#129375)
-   [Print pointer metadata in `Debug` impl of raw pointers](rust-lang/rust#135080)
-   [`Vec::with_capacity` guarantees it allocates with the amount requested, even if `Vec::capacity` returns a different number.](rust-lang/rust#135933)
-   Most `std::arch` intrinsics which don't take pointer arguments can now be called from safe code if the caller has the appropriate target features already enabled (rust-lang/stdarch#1714, rust-lang/stdarch#1716, rust-lang/stdarch#1717)
-   [Undeprecate `env::home_dir`](rust-lang/rust#137327)
-   [Denote `ControlFlow` as `#[must_use]`](rust-lang/rust#137449)
-   [Macros such as `assert_eq!` and `vec!` now support `const {...}` expressions](rust-lang/rust#138162)

<a id="1.87.0-Stabilized-APIs"></a>

## Stabilized APIs

-   [`Vec::extract_if`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.extract_if)
-   [`vec::ExtractIf`](https://doc.rust-lang.org/stable/std/vec/struct.ExtractIf.html)
-   [`LinkedList::extract_if`](https://doc.rust-lang.org/stable/std/collections/struct.LinkedList.html#method.extract_if)
-   [`linked_list::ExtractIf`](https://doc.rust-lang.org/stable/std/collections/linked_list/struct.ExtractIf.html)
-   [`<[T]>::split_off`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off)
-   [`<[T]>::split_off_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_mut)
-   [`<[T]>::split_off_first`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first)
-   [`<[T]>::split_off_first_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first_mut)
-   [`<[T]>::split_off_last`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last)
-   [`<[T]>::split_off_last_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last_mut)
-   [`String::extend_from_within`](https://doc.rust-lang.org/stable/alloc/string/struct.String.html#method.extend_from_within)
-   [`os_str::Display`](https://doc.rust-lang.org/stable/std/ffi/os_str/struct.Display.html)
-   [`OsString::display`](https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.display)
-   [`OsStr::display`](https://doc.rust-lang.org/stable/std/ffi/struct.OsStr.html#method.display)
-   [`io::pipe`](https://doc.rust-lang.org/stable/std/io/fn.pipe.html)
-   [`io::PipeReader`](https://doc.rust-lang.org/stable/std/io/struct.PipeReader.html)
-   [`io::PipeWriter`](https://doc.rust-lang.org/stable/std/io/struct.PipeWriter.html)
-   [`impl From<PipeReader> for OwnedHandle`](https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeReader%3E-for-OwnedHandle)
-   [`impl From<PipeWriter> for OwnedHandle`](https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeWriter%3E-for-OwnedHandle)
-   [`impl From<PipeReader> for Stdio`](https://doc.rust-lang.org/stable/std/process/struct.Stdio.html)
-   [`impl From<PipeWriter> for Stdio`](https://doc.rust-lang.org/stable/std/process/struct.Stdio.html#impl-From%3CPipeWriter%3E-for-Stdio)
-   [`impl From<PipeReader> for OwnedFd`](https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeReader%3E-for-OwnedFd)
-   [`impl From<PipeWriter> for OwnedFd`](https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeWriter%3E-for-OwnedFd)
-   [`Box<MaybeUninit<T>>::write`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.write)
-   [`impl TryFrom<Vec<u8>> for String`](https://doc.rust-lang.org/stable/std/string/struct.String.html#impl-TryFrom%3CVec%3Cu8%3E%3E-for-String)
-   [`<*const T>::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned)
-   [`<*const T>::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned)
-   [`<*mut T>::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned-1)
-   [`<*mut T>::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned-1)
-   [`NonNull::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.offset_from_unsigned)
-   [`NonNull::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.byte_offset_from_unsigned)
-   [`<uN>::cast_signed`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.cast_signed)
-   [`NonZero::<uN>::cast_signed`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_signed-5).
-   [`<iN>::cast_unsigned`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.cast_unsigned).
-   [`NonZero::<iN>::cast_unsigned`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_unsigned-5).
-   [`<uN>::is_multiple_of`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.is_multiple_of)
-   [`<uN>::unbounded_shl`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shl)
-   [`<uN>::unbounded_shr`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shr)
-   [`<iN>::unbounded_shl`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shl)
-   [`<iN>::unbounded_shr`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shr)
-   [`<iN>::midpoint`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.midpoint)
-   [`<str>::from_utf8`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8)
-   [`<str>::from_utf8_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8\_mut)
-   [`<str>::from_utf8_unchecked`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8\_unchecked)
-   [`<str>::from_utf8_unchecked_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8\_unchecked_mut)

These previously stable APIs are now stable in const contexts:

-   [`core::str::from_utf8_mut`](https://doc.rust-lang.org/stable/std/str/fn.from_utf8\_mut.html)
-   [`<[T]>::copy_from_slice`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.copy_from_slice)
-   [`SocketAddr::set_ip`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_ip)
-   [`SocketAddr::set_port`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_port),
-   [`SocketAddrV4::set_ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_ip)
-   [`SocketAddrV4::set_port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_port),
-   [`SocketAddrV6::set_ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_ip)
-   [`SocketAddrV6::set_port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_port)
-   [`SocketAddrV6::set_flowinfo`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_flowinfo)
-   [`SocketAddrV6::set_scope_id`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_scope_id)
-   [`char::is_digit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_digit)
-   [`char::is_whitespace`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_whitespace)
-   [`<[[T; N]]>::as_flattened`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened)
-   [`<[[T; N]]>::as_flattened_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened_mut)
-   [`String::into_bytes`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.into_bytes)
-   [`String::as_str`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_str)
-   [`String::capacity`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.capacity)
-   [`String::as_bytes`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_bytes)
-   [`String::len`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.len)
-   [`String::is_empty`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.is_empty)
-   [`String::as_mut_str`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_str)
-   [`String::as_mut_vec`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_vec)
-   [`Vec::as_ptr`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_ptr)
-   [`Vec::as_slice`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_slice)
-   [`Vec::capacity`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.capacity)
-   [`Vec::len`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.len)
-   [`Vec::is_empty`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.is_empty)
-   [`Vec::as_mut_slice`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_slice)
-   [`Vec::as_mut_ptr`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_ptr)

<a id="1.87.0-Cargo"></a>

## Cargo

-   [Add terminal integration via ANSI OSC 9;4 sequences](rust-lang/cargo#14615)
-   [chore: bump openssl to v3](rust-lang/cargo#15232)
-   [feat(package): add --exclude-lockfile flag](rust-lang/cargo#15234)

<a id="1.87.0-Compatibility-Notes"></a>

## Compatibility Notes

-   [Rust now raises an error for macro invocations inside the `#![crate_name]` attribute](rust-lang/rust#127581)
-   [Unstable fields are now always considered to be inhabited](rust-lang/rust#133889)
-   [Macro arguments of unary operators followed by open beginning ranges may now be matched differently](rust-lang/rust#134900)
-   [Make `Debug` impl of raw pointers print metadata if present](rust-lang/rust#135080)
-   [Warn against function pointers using unsupported ABI strings in dependencies](rust-lang/rust#135767)
-   [Associated types on `dyn` types are no longer deduplicated](rust-lang/rust#136458)
-   [Forbid attributes on `..` inside of struct patterns (`let Struct { #[attribute] .. }) =`](rust-lang/rust#136490)
-   [Make `ptr_cast_add_auto_to_object` lint into hard error](rust-lang/rust#136764)
-   Many `std::arch` intrinsics are now safe to call in some contexts, there may now be new `unused_unsafe` warnings in existing codebases.
-   [Limit `width` and `precision` formatting options to 16 bits on all targets](rust-lang/rust#136932)
-   [Turn order dependent trait objects future incompat warning into a hard error](rust-lang/rust#136968)
-   [Denote `ControlFlow` as `#[must_use]`](rust-lang/rust#137449)
-   [Windows: The standard library no longer links `advapi32`, except on win7.](rust-lang/rust#138233) Code such as C libraries that were relying on this assumption may need to explicitly link advapi32.
-   [Proc macros can no longer observe expanded `cfg(true)` attributes.](rust-lang/rust#138844)
-   [Start changing the internal representation of pasted tokens](rust-lang/rust#124141). Certain invalid declarative macros that were previously accepted in obscure circumstances are now correctly rejected by the compiler. Use of a `tt` fragment specifier can often fix these macros.
-   [Don't allow flattened format_args in const.](rust-lang/rust#139624)

<a id="1.87.0-Internal-Changes"></a>

## Internal Changes

These changes do not affect any public interfaces of Rust, but they represent
significant improvements to the performance or internals of rustc and related
tools.

-   [Update to LLVM 20](rust-lang/rust#135763)

</details>

---

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