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Use def span for non-ascii ident feature gate error #46803

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merged 1 commit into from
Dec 27, 2017
Merged

Use def span for non-ascii ident feature gate error #46803

merged 1 commit into from
Dec 27, 2017

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estebank
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r? @arielb1

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@kennytm kennytm added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Dec 18, 2017
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arielb1 commented Dec 18, 2017

I'm worried this might call def_span on random-ish AST nodes (whatever is passed to visit_name), with possibly random results. What are the sort of nodes that are supposed to be valid input to def_span?

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@arielb1 def_span is an outright hack that takes everything in the original span until the next occurrence of the char {, or the full span if it reaches newline before then. The case where this could be a problem would be if a user tried something like type My{Weird}Type;, but that would get caught by the parser.

bjorn3
bjorn3 reviewed Dec 19, 2017
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src/test/ui/feature-gate-non_ascii_idents.stderr
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= help: add #![feature(non_ascii_idents)] to the crate attributes to enable

error: non-ascii idents are not fully supported. (see issue #28979)
--> $DIR/feature-gate-non_ascii_idents.rs:34:5
|
34 | / Bäz { //~ ERROR non-ascii idents
35 | | qüx: isize //~ ERROR non-ascii idents
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Why doesn't this line give an error?

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@estebank estebank Dec 19, 2017 •
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Good question. It wasn't already, would have to check.
@bjorn3 that error is being emitted further down, it's just hidden in the diff because it didn't change in this PR :)

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arielb1 commented Dec 25, 2017

r? @petrochenkov

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@bors r+

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bors commented Dec 26, 2017

📌 Commit 502d570 has been approved by petrochenkov

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bors commented Dec 27, 2017

⌛ Testing commit 502d570 with merge e8098c5...

bors added a commit that referenced this pull request Dec 27, 2017
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Auto merge of #46803 - estebank:non-ascii-def-span, r=petrochenkov
e8098c5 
Use def span for non-ascii ident feature gate error
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bors commented Dec 27, 2017

☀️ Test successful - status-appveyor, status-travis
Approved by: petrochenkov
Pushing e8098c5 to master...

@bors bors merged commit 502d570 into rust-lang:master Dec 27, 2017
@bors bors mentioned this pull request Dec 27, 2017
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@estebank @rust-highfive @arielb1 @petrochenkov @bors @bjorn3 @kennytm