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On recursive ADT, provide indirection structured suggestion #72740

Merged
merged 3 commits into from
Jun 15, 2020
Merged

On recursive ADT, provide indirection structured suggestion #72740

merged 3 commits into from
Jun 15, 2020

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estebank
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r? @matthewjasper

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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 May 29, 2020
estebank
estebank commented May 29, 2020
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src/test/ui/infinite/infinite-tag-type-recursion.stderr Outdated
Comment on lines 15 to 16
LL | enum MList { Cons(isize, &MList), Nil }
| ^
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This suggestion isn't entirely correct, but if used the compiler will correctly tell you to write

enum MList<'a> { Cons(isize, &'a MList), Nil }

so I think it is ok.

lcnr
lcnr reviewed May 29, 2020
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src/test/ui/issues/issue-17431-4.stderr Outdated
|
LL | struct Foo<T> { foo: Box<Option<Option<Foo<T>>>>, marker: marker::PhantomData<T> }
| ^^^^ ^
LL | struct Foo<T> { foo: Rc<Option<Option<Foo<T>>>>, marker: marker::PhantomData<T> }
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These suggestions are now fairly long. While I don't have a strong opinion here, it may be better to only mention Box and & here.

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@lcnr lcnr May 29, 2020 •
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Or thinking more about it, I would prefer if we keep

help: insert indirection (e.g., a Box, Rc, or &) at some point to make Foo representable

and only add an example using Box.

matthewjasper
matthewjasper reviewed May 29, 2020
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I'm also a bit concerned by the length of this suggestion.

src/librustc_trait_selection/traits/error_reporting/mod.rs Outdated Show resolved Hide resolved
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@bors r+

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bors commented May 31, 2020

📌 Commit c209040 has been approved by matthewjasper

@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 May 31, 2020
RalfJung added a commit to RalfJung/rust that referenced this pull request Jun 1, 2020
@RalfJung
Rollup merge of rust-lang#72740 - estebank:recursive-indirection, r=m…
ceb26de 
…atthewjasper

On recursive ADT, provide indirection structured suggestion
@RalfJung RalfJung mentioned this pull request Jun 1, 2020
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RalfJung added a commit to RalfJung/rust that referenced this pull request Jun 6, 2020
@RalfJung
Rollup merge of rust-lang#72740 - estebank:recursive-indirection, r=m…
d4a4f16 
…atthewjasper

On recursive ADT, provide indirection structured suggestion
@RalfJung RalfJung mentioned this pull request Jun 6, 2020
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RalfJung commented Jun 6, 2020

Failed in https://github.com/rust-lang/rust/runs/744866295:

---- [ui] ui/issues/issue-72554.rs stdout ----
diff of stderr:

6	LL |     A(ElemDerived)
7	   |       ----------- recursive without indirection
8	   |
-	   = help: insert indirection (e.g., a `Box`, `Rc`, or `&`) at some point to make `ElemDerived` representable
+	help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to make `ElemDerived` representable
+	   |
+	LL |     A(Box<ElemDerived>)
+	   |       ^^^^           ^
10	
11	error: aborting due to previous error
12

Probably needs a re-bless.
@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 Jun 6, 2020
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@bors r=matthewjasper rebased

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bors commented Jun 10, 2020

📌 Commit 03552ec has been approved by matthewjasper

@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 Jun 10, 2020
RalfJung added a commit to RalfJung/rust that referenced this pull request Jun 11, 2020
@RalfJung
Rollup merge of rust-lang#72740 - estebank:recursive-indirection, r=m…
fdf36ff 
…atthewjasper

On recursive ADT, provide indirection structured suggestion
@RalfJung RalfJung mentioned this pull request Jun 11, 2020
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RalfJung added a commit to RalfJung/rust that referenced this pull request Jun 12, 2020
@RalfJung
Rollup merge of rust-lang#72740 - estebank:recursive-indirection, r=m…
35e5dfe 
…atthewjasper

On recursive ADT, provide indirection structured suggestion
@RalfJung RalfJung mentioned this pull request Jun 12, 2020
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Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request Jun 12, 2020
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Rollup merge of rust-lang#72740 - estebank:recursive-indirection, r=m…
c30ca41 
…atthewjasper

On recursive ADT, provide indirection structured suggestion
@Dylan-DPC-zz Dylan-DPC-zz mentioned this pull request Jun 12, 2020
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Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request Jun 13, 2020
@Dylan-DPC
Rollup merge of rust-lang#72740 - estebank:recursive-indirection, r=m…
08b8505 
…atthewjasper

On recursive ADT, provide indirection structured suggestion
@Dylan-DPC-zz Dylan-DPC-zz mentioned this pull request Jun 13, 2020
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Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request Jun 14, 2020
@Dylan-DPC
Rollup merge of rust-lang#72740 - estebank:recursive-indirection, r=m…
f8b99dd 
…atthewjasper

On recursive ADT, provide indirection structured suggestion
@Dylan-DPC-zz Dylan-DPC-zz mentioned this pull request Jun 14, 2020
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RalfJung added a commit to RalfJung/rust that referenced this pull request Jun 15, 2020
@RalfJung
Rollup merge of rust-lang#72740 - estebank:recursive-indirection, r=m…
254c9f0 
…atthewjasper

On recursive ADT, provide indirection structured suggestion
This was referenced Jun 15, 2020
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bors added a commit to rust-lang-ci/rust that referenced this pull request Jun 15, 2020
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Auto merge of rust-lang#73369 - RalfJung:rollup-hl8g9zf, r=RalfJung
ff4a253 
Rollup of 10 pull requests

Successful merges:

 - rust-lang#72707 (Use min_specialization in the remaining rustc crates)
 - rust-lang#72740 (On recursive ADT, provide indirection structured suggestion)
 - rust-lang#72879 (Miri: avoid tracking current location three times)
 - rust-lang#72938 (Stabilize Option::zip)
 - rust-lang#73086 (Rename "cyclone" to "apple-a7" per changes in upstream LLVM)
 - rust-lang#73104 (Example about explicit mutex dropping)
 - rust-lang#73139 (Add methods to go from a nul-terminated Vec<u8> to a CString)
 - rust-lang#73296 (Remove vestigial CI job msvc-aux.)
 - rust-lang#73304 (Revert heterogeneous SocketAddr PartialEq impls)
 - rust-lang#73331 (extend network support for HermitCore)

Failed merges:

r? @ghost
@bors bors merged commit d97e8ca into rust-lang:master Jun 15, 2020
@estebank estebank deleted the recursive-indirection branch November 9, 2023 05:16
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