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Add Identity lang item#103985

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GuillaumeGomez wants to merge 4 commits intorust-lang:masterfrom
GuillaumeGomez:ty-alias-handling
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Add Identity lang item#103985
GuillaumeGomez wants to merge 4 commits intorust-lang:masterfrom
GuillaumeGomez:ty-alias-handling

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@GuillaumeGomez GuillaumeGomez commented Nov 4, 2022

This is another approach for #97974 suggested by @oli-obk.

The plan with this is then to add the TyAlias variant into the rustc_type_ir TyKind enum.

cc @compiler-errors

r? @oli-obk

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Nov 4, 2022
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GuillaumeGomez commented Nov 4, 2022

I added the missing "explanation" for the ignored code block in the documentation.

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jackh726 commented Nov 5, 2022

Wait...why?

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oli-obk commented Nov 5, 2022

Wait...why?

🤣 this is missing like 112% of the context. The linked PR is a huge task it seems and I wanted @GuillaumeGomez to check if the problem is that we don't normalize in enough places or whether it's just the linked PR missing a normalization for the new type alias variant wherever we normalize projections. If this pr passes, then the linked PR should be trivial instead of adding normalization to a billion places. If this PR fails, then we can build tests that fail on master by doing the same thing as what this PR does just without a lang item and contained to a single test

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GuillaumeGomez commented Nov 5, 2022

Everything falls apart as soon as we run outside of bootstrap because it doesn't seem to be able to find the Identity lang item from what I can see.

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@GuillaumeGomez GuillaumeGomez mentioned this pull request Nov 15, 2022
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bors commented Nov 24, 2022

☔ The latest upstream changes (presumably #104321) made this pull request unmergeable. Please resolve the merge conflicts.

@clarfonthey clarfonthey mentioned this pull request Dec 7, 2022
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@oli-obk oli-obk added S-blocked Status: Blocked on something else such as an RFC or other implementation work. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Dec 13, 2022
@GuillaumeGomez GuillaumeGomez force-pushed the ty-alias-handling branch 2 times, most recently from f51abc6 to f51255f Compare January 12, 2023 13:32
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This was referenced Jan 13, 2023
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@GuillaumeGomez GuillaumeGomez mentioned this pull request Jan 24, 2023
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bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 9, 2023
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Auto merge of rust-lang#106938 - GuillaumeGomez:normalize-projection-…
c40919b 
…field-ty, r=oli-obk

Add missing normalization for union fields types

Overshadows rust-lang#106808.
From the experiment rust-lang#103985.

In short, it allows to use projections as a type for union's fields.

cc `@compiler-errors`
r? `@oli-obk`
RalfJung pushed a commit to RalfJung/miri that referenced this pull request Feb 11, 2023
@bors
Auto merge of #106938 - GuillaumeGomez:normalize-projection-field-ty,…
680fff0 
… r=oli-obk

Add missing normalization for union fields types

Overshadows rust-lang/rust#106808.
From the experiment rust-lang/rust#103985.

In short, it allows to use projections as a type for union's fields.

cc `@compiler-errors`
r? `@oli-obk`
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bors commented Mar 14, 2023

☔ The latest upstream changes (presumably #104833) made this pull request unmergeable. Please resolve the merge conflicts.

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fmease commented Nov 15, 2023 •
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Superseded by #108860 if I understand correctly. Closing as completed. Feel free to reopen if you disagree.

@fmease fmease closed this Nov 15, 2023
Kobzol pushed a commit to Kobzol/portable-simd that referenced this pull request Feb 3, 2026
@bors
Auto merge of #106938 - GuillaumeGomez:normalize-projection-field-ty,…
e51aabe 
… r=oli-obk

Add missing normalization for union fields types

Overshadows rust-lang/rust#106808.
From the experiment rust-lang/rust#103985.

In short, it allows to use projections as a type for union's fields.

cc `@compiler-errors`
r? `@oli-obk`
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@GuillaumeGomez @rust-log-analyzer @jackh726 @oli-obk @bors @fmease @rustbot