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Improve diagnostics when attempting to match tuple enum variant with struct pattern #44786

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Merged
merged 2 commits into from
Sep 24, 2017

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thombles
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@thombles thombles commented Sep 23, 2017

Adds an extra note as below to explain that a tuple pattern was probably intended.

error[E0026]: variant `X::Y` does not have a field named `data`
  --> src/main.rs:18:16
   |
18 |         X::Y { data } => println!("The data is {}", data)
   |                ^^^^ variant `X::Y` does not have field `data`

error[E0027]: pattern does not mention field `0`
  --> src/main.rs:18:9
   |
18 |         X::Y { data } => println!("The data is {}", data)
   |         ^^^^^^^^^^^^^ missing field `0`
   |
   = note: trying to match a tuple variant with a struct variant pattern

Fixes #41314.

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Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @arielb1 (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

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@petrochenkov
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Thanks!
@bors r+

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bors commented Sep 23, 2017

📌 Commit def660c has been approved by petrochenkov

GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this pull request Sep 23, 2017
Improve diagnostics when attempting to match tuple enum variant with struct pattern

Adds an extra note as below to explain that a tuple pattern was probably intended.

```
error[E0026]: variant `X::Y` does not have a field named `data`
  --> src/main.rs:18:16
   |
18 |         X::Y { data } => println!("The data is {}", data)
   |                ^^^^ variant `X::Y` does not have field `data`

error[E0027]: pattern does not mention field `0`
  --> src/main.rs:18:9
   |
18 |         X::Y { data } => println!("The data is {}", data)
   |         ^^^^^^^^^^^^^ missing field `0`
   |
   = note: trying to match a tuple variant with a struct variant pattern
```

Solution for rust-lang#41314.
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bors commented Sep 24, 2017

⌛ Testing commit def660c with merge 6f90787...

bors added a commit that referenced this pull request Sep 24, 2017
Improve diagnostics when attempting to match tuple enum variant with struct pattern

Adds an extra note as below to explain that a tuple pattern was probably intended.

```
error[E0026]: variant `X::Y` does not have a field named `data`
  --> src/main.rs:18:16
   |
18 |         X::Y { data } => println!("The data is {}", data)
   |                ^^^^ variant `X::Y` does not have field `data`

error[E0027]: pattern does not mention field `0`
  --> src/main.rs:18:9
   |
18 |         X::Y { data } => println!("The data is {}", data)
   |         ^^^^^^^^^^^^^ missing field `0`
   |
   = note: trying to match a tuple variant with a struct variant pattern
```

Fixes #41314.
@bors
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bors commented Sep 24, 2017

☀️ Test successful - status-appveyor, status-travis
Approved by: petrochenkov
Pushing 6f90787 to master...

@bors bors merged commit def660c into rust-lang:master Sep 24, 2017
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5 participants