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Group unused import warnings per path list

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Given a file

```rust
use std::collections::{BinaryHeap, BTreeMap, BTreeSet};

fn main() {}
```

Show a single warning, instead of three for each unused import:

```nocode
warning: unused imports, #[warn(unused_imports)] on by default
 --> foo.rs:1:24
  |
1 | use std::collections::{BinaryHeap, BTreeMap, BTreeSet};
  |                        ^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^
```

Include support for lints pointing at `MultilineSpan`s, instead of just
`Span`s.
This commit is contained in:
Esteban Küber 2016-10-25 23:24:09 -07:00
parent 0491a23177
commit a820d99eb2
7 changed files with 82 additions and 26 deletions
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11
src/librustc/session/mod.rs
View file

@ -258,14 +258,15 @@ impl Session {
pub fn unimpl(&self, msg: &str) -> ! {
self.diagnostic().unimpl(msg)
}
pub fn add_lint(&self,
lint: &'static lint::Lint,
id: ast::NodeId,
sp: Span,
msg: String)
pub fn add_lint<S: Into<MultiSpan>>(&self,
lint: &'static lint::Lint,
id: ast::NodeId,
sp: S,
msg: String)
{
self.add_lint_diagnostic(lint, id, (sp, &msg[..]))
}
pub fn add_lint_diagnostic<M>(&self,
lint: &'static lint::Lint,
id: ast::NodeId,