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const blocks as a mod item #149174

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const blocks as a mod item #149174

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@GrigorenkoPV GrigorenkoPV commented Nov 21, 2025 •
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Tracking issue: #149226

This adds support for writing const { ... } as an item in a module. In the current implementation, this is a unique AST item that gets lowered to const _: () = const { ... } in HIR.

TODO:

  • check correctness of AllowConstBlockItems usages
  • add more tests

@rustbot rustbot added O-SGX Target: SGX S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. 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. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. labels Nov 21, 2025
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@GrigorenkoPV GrigorenkoPV changed the title Const block item const blocks as a mod's item Nov 22, 2025
@GrigorenkoPV GrigorenkoPV mentioned this pull request Nov 22, 2025
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@GrigorenkoPV GrigorenkoPV changed the title const blocks as a mod's item const blocks as a mod item Nov 23, 2025
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O-SGX Target: SGX S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. 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. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.

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