forbid generic params in the type of const params #74159
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I think it'd help to discuss this on Zulip, because there were objections previously to blocking this in name resolution. I also want to figure out where the previous error went missing, because I would have thought it would have been sufficient if it had stayed around. I'll try to look, but I don't have time immediately. |
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☔ The latest upstream changes (presumably #74330) made this pull request unmergeable. Please resolve the merge conflicts. |
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src/test/ui/const-generics/const-param-type-depends-on-const-param.stderr
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I'm happy with the implementation: I just want to tweak that error message a little bit. |
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@bors r+ Thanks! |
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📌 Commit 09ba0bd has been approved by |
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forbid generic params in the type of const params implements and closes rust-lang#74152 fixes rust-lang#74101, closes rust-lang#71169, fixes rust-lang#73491, closes rust-lang#62878 @eddyb and I talked [on zulip](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/type.20of.20const.20parameters/near/203405696) about this and we probably want to also forbid generic consts in the default type of a parameter, e.g. `struct Foo<T, U = [u8; std::mem::size_of::<T>()]>`, this is currently still allowed and I will probably fix that in a followup PR. r? @varkor @eddyb
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forbid generic params in the type of const params implements and closes rust-lang#74152 fixes rust-lang#74101, closes rust-lang#71169, fixes rust-lang#73491, closes rust-lang#62878 @eddyb and I talked [on zulip](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/type.20of.20const.20parameters/near/203405696) about this and we probably want to also forbid generic consts in the default type of a parameter, e.g. `struct Foo<T, U = [u8; std::mem::size_of::<T>()]>`, this is currently still allowed and I will probably fix that in a followup PR. r? @varkor @eddyb
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…arth Rollup of 21 pull requests Successful merges: - rust-lang#73566 (Don't run `everybody_loops` for rustdoc; instead ignore resolution errors) - rust-lang#73771 (Don't pollute docs/suggestions with libstd deps) - rust-lang#73794 (Small cleanup for E0705 explanation) - rust-lang#73807 (rustdoc: glue tokens before highlighting) - rust-lang#73835 (Clean up E0710 explanation) - rust-lang#73926 (Ignoring test case: [codegen] repr-transparent-aggregates-1.rs for aarch64) - rust-lang#73981 (Remove some `ignore-stage1` annotations.) - rust-lang#73998 (add regression test for rust-lang#61216) - rust-lang#74140 (Make hir ProjectionKind more precise) - rust-lang#74148 (Move #[doc(alias)] check in rustc) - rust-lang#74159 (forbid generic params in the type of const params) - rust-lang#74171 (Fix 44056 test with debug on macos.) - rust-lang#74221 (Don't panic if the lhs of a div by zero is not statically known) - rust-lang#74325 (Focus on the current file in the source file sidebar) - rust-lang#74359 (rustdoc: Rename internal API fns to `into_string`) - rust-lang#74370 (Reintroduce spotlight / "important traits" feature) - rust-lang#74390 (Fix typo in std::mem::transmute documentation) - rust-lang#74391 (BtreeMap: superficially refactor root access) - rust-lang#74392 (const generics triage) - rust-lang#74397 (Fix typo in the latest release note) - rust-lang#74406 (Set shell for github actions CI) Failed merges: r? @ghost
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Closes rust-lang#69414 (no longer ICEs after rust-lang#74159)
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Add regression test for rust-lang#69414 Closes rust-lang#69414 (no longer ICEs after rust-lang#74159)
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Add regression test for rust-lang#69414 Closes rust-lang#69414 (no longer ICEs after rust-lang#74159)
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Add regression test for rust-lang#69414 Closes rust-lang#69414 (no longer ICEs after rust-lang#74159)
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…-DPC add test for rust-lang#62878 forgot to push this as part of rust-lang#74159 r? @Dylan-DPC
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implements and closes #74152
fixes #74101, closes #71169, fixes #73491, closes #62878
@eddyb and I talked on zulip about this and we probably want to also forbid generic consts in the default
type of a parameter, e.g.
struct Foo<T, U = [u8; std::mem::size_of::<T>()]>, this is currently still allowedand I will probably fix that in a followup PR.
r? @varkor @eddyb