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add test for 62220 #70539

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merged 1 commit into from Mar 29, 2020
Merged

add test for 62220 #70539

merged 1 commit into from Mar 29, 2020

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DutchGhost
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@DutchGhost DutchGhost commented Mar 29, 2020 •
edited by Dylan-DPC-zz

Closes #62220

Adds a test for #62220.

Im not sure whether check-pass is sufficient here. I didn't put run-pass in, as I'm afraid that'll fail due to the unimplemented!() return in the code.

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r? @nikomatsakis

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Mar 29, 2020
@Centril Centril added the F-const_generics `#![feature(const_generics)]` label Mar 29, 2020
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Centril reviewed Mar 29, 2020
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src/test/ui/const-generics/issues/issue-62220.rs Outdated Show resolved Hide resolved
src/test/ui/const-generics/issues/issue-62220.rs
#![feature(const_generics)]
pub struct Vector<T, const N: usize>([T; N]);

pub type TruncatedVector<T, const N: usize> = Vector<T, { N - 1 }>;
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@eddyb @varkor Shouldn't error: constant expression depends on a generic parameter happen here or is this cause we're not applying WF for type aliases... but then why won't it happen for the usage below?

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We're not doing const WF at all except for array types, today.
#70107 aims to fix that.

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Ah; forgot that hadn't landed yet. Let's merge this PR like this then once the other comment has been addressed and we can make adjustments later in the other.

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Centril commented Mar 29, 2020

r? @Centril @bors r+

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bors commented Mar 29, 2020

📌 Commit 3fa3c7a19a883ceeeecea5273520b569a959057e has been approved by Centril

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 29, 2020
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varkor commented Mar 29, 2020

@DutchGhost: could you flatten the two commits (as the second just undoes something in the first)? Thanks!

@bors r-

@bors bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Mar 29, 2020
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How do I flatten commits?

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varkor commented Mar 29, 2020

In this case, the easiest option is probably to do git reset HEAD~2, which will undo the last 2 commits, and then commit all the changes as one commit, then force push. In general, you can do this with an interactive rebase for more fine-grained control. See this StackOverflow question, for instance.

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@bors r+ rollup

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bors commented Mar 29, 2020

📌 Commit 61d4193 has been approved by Dylan-DPC

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Mar 29, 2020
@Dylan-DPC-zz Dylan-DPC-zz mentioned this pull request Mar 29, 2020
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bors added a commit to rust-lang-ci/rust that referenced this pull request Mar 29, 2020
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Auto merge of rust-lang#70544 - Dylan-DPC:rollup-pj86j17, r=Dylan-DPC
699f83f 
Rollup of 4 pull requests

Successful merges:

 - rust-lang#69702 (Rename TyLayout to TyAndLayout.)
 - rust-lang#70539 (add test for 62220)
 - rust-lang#70540 (#[link]: mention wasm_import_module instead of cfg)
 - rust-lang#70541 (prohibit_generics: update has_err for consts)

Failed merges:

r? @ghost
@bors bors merged commit 5a7b377 into rust-lang:master Mar 29, 2020
@varkor varkor mentioned this pull request Jul 22, 2020
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Compiler panics when trying to calculate layout of const generic based type
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@DutchGhost @rust-highfive @Centril @bors @varkor @Dylan-DPC-zz @eddyb @nikomatsakis