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bors 97872b792c Auto merge of #107478 - compiler-errors:anon-enum-tys-are-ambiguous, r=estebank 
Revert "Teach parser to understand fake anonymous enum syntax" and related commits

anonymous enum types are currently ambiguous in positions like:

* `|` operator: `a as fn() -> B | C`
* closure args: `|_: as fn() -> A | B`

I first tried to thread around `RecoverAnonEnum` into all these positions, but the resulting complexity in the compiler is IMO not worth it, or at least worth a bit more thinking time. In the mean time, let's revert this syntax for now, so we can go back to the drawing board.

Fixes #107461

cc: `@estebank` `@cjgillot` #106960

---
### Squashed revert commits:

Revert "review comment: Remove AST AnonTy"

This reverts commit 020cca8d36.

Revert "Ensure macros are not affected"

This reverts commit 12d18e4031.

Revert "Emit fewer errors on patterns with possible type ascription"

This reverts commit c847a01a3b.

Revert "Teach parser to understand fake anonymous enum syntax"

This reverts commit 2d82420665.
2023-02-02 12:01:17 +00:00
..
assembly bump failing assembly & codegen tests from LLVM 14 to LLVM 15 2023-01-17 20:02:01 +01:00
auxiliary Move /src/test to /tests 2023-01-11 09:32:08 +00:00
codegen Rollup merge of #107373 - michaelwoerister:dont-merge-vtables-when-debuginfo, r=WaffleLapkin 2023-01-28 05:20:19 +01:00
codegen-units Move /src/test to /tests 2023-01-11 09:32:08 +00:00
debuginfo Upgrade mingw-w64 on CI 2023-01-29 13:01:06 +01:00
incremental Move /src/test to /tests 2023-01-11 09:32:08 +00:00
mir-opt Reimplement NormalizeArrayLen. 2023-01-29 21:19:02 +00:00
pretty Update tests. 2023-01-29 20:19:26 +01:00
run-make incremental: migrate diagnostics 2023-01-30 17:11:35 +00:00
run-make-fulldeps Modify primary span label for E0308 2023-01-30 20:12:19 +00:00
run-pass-valgrind Move /src/test to /tests 2023-01-11 09:32:08 +00:00
rustdoc rustdoc: stop making unstable items transparent 2023-01-31 11:27:09 -07:00
rustdoc-gui rustdoc: remove unnecessary wrapper div.item-decl from HTML 2023-01-30 11:06:18 -07:00
rustdoc-js rustdoc: update search test cases 2023-01-14 12:04:12 -07:00
rustdoc-js-std rustdoc: update search test cases 2023-01-14 12:04:12 -07:00
rustdoc-json Move /src/test to /tests 2023-01-11 09:32:08 +00:00
rustdoc-ui Modify primary span label for E0308 2023-01-30 20:12:19 +00:00
ui Auto merge of #107478 - compiler-errors:anon-enum-tys-are-ambiguous, r=estebank 2023-02-02 12:01:17 +00:00
ui-fulldeps Forbid #[suggestion_*(...)] on Vecs 2023-02-01 21:49:45 +01:00
COMPILER_TESTS.md Move /src/test to /tests 2023-01-11 09:32:08 +00:00