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Improve eager type resolution error message #50712

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leoyvens
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This PR improves the span of eager resolution type errors referring to indexing and field access to use the base span rather than the whole expression.

Also a "note: type must be known at this point" is added where in the past we emitted the "type must be known at this context" error, so that early failures can be differentiated and will hopefully be less surprising.

Fixes #50692 (or at least does the best we can for the moment)

r? @estebank

This PR improves the span of eager resolution type errors referring to indexing and field access to use the base span rather than the whole expression.

Also a note "Type must be known at this point." is added to where we at some point in the past emitted the "type must be known at this context" error, so that early failures can be differentiated and will hopefully be less surprising.

Fixes rust-lang#50692 (or at least does the best we can for the moment)

r? @estebank
@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label May 13, 2018
@estebank
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@bors r+ rollup

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bors commented May 14, 2018

📌 Commit 8789056 has been approved by estebank

@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 14, 2018
kennytm added a commit to kennytm/rust that referenced this pull request May 14, 2018
…n-error-message, r=estebank

Improve eager type resolution error message

This PR improves the span of eager resolution type errors referring to indexing and field access to use the base span rather than the whole expression.

Also a "note: type must be known at this point" is added where in the past we emitted the "type must be known at this context" error, so that early failures can be differentiated and will hopefully be less surprising.

Fixes rust-lang#50692 (or at least does the best we can for the moment)

r? @estebank
GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this pull request May 15, 2018
…n-error-message, r=estebank

Improve eager type resolution error message

This PR improves the span of eager resolution type errors referring to indexing and field access to use the base span rather than the whole expression.

Also a "note: type must be known at this point" is added where in the past we emitted the "type must be known at this context" error, so that early failures can be differentiated and will hopefully be less surprising.

Fixes rust-lang#50692 (or at least does the best we can for the moment)

r? @estebank
bors added a commit that referenced this pull request May 15, 2018
Rollup of 11 pull requests

Successful merges:

 - #49767 (Rewrite docs for `std::ptr`)
 - #50399 (save-analysis: handle aliasing imports a bit more nicely)
 - #50594 (Update the man page with additional --print options)
 - #50613 (Migrate the toolstate update bot to rust-highfive)
 - #50632 (Add minification process)
 - #50685 (ci: Add Dockerfile for dist-sparc64-linux)
 - #50691 (rustdoc: Add support for pub(restricted))
 - #50712 (Improve eager type resolution error message)
 - #50720 (Add “Examples” section header in f32/f64 doc comments.)
 - #50733 (Hyperlink DOI against preferred resolver)
 - #50745 (Uncapitalize "You")

Failed merges:
@bors bors merged commit 8789056 into rust-lang:master May 15, 2018
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4 participants