diff options
| -rw-r--r-- | clippy_lints/src/unused_io_amount.rs | 2 | ||||
| -rw-r--r-- | tests/ui/unused_io_amount.rs | 8 | ||||
| -rw-r--r-- | tests/ui/unused_io_amount.stderr | 44 |
3 files changed, 47 insertions, 7 deletions
diff --git a/clippy_lints/src/unused_io_amount.rs b/clippy_lints/src/unused_io_amount.rs index 92053cec59f..0e526c216be 100644 --- a/clippy_lints/src/unused_io_amount.rs +++ b/clippy_lints/src/unused_io_amount.rs @@ -65,7 +65,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedIoAmount { } }, hir::ExprKind::MethodCall(path, arg_0, ..) => match path.ident.as_str() { - "expect" | "unwrap" | "unwrap_or" | "unwrap_or_else" => { + "expect" | "unwrap" | "unwrap_or" | "unwrap_or_else" | "is_ok" | "is_err" => { check_map_error(cx, arg_0, expr); }, _ => (), diff --git a/tests/ui/unused_io_amount.rs b/tests/ui/unused_io_amount.rs index 4b059558173..8d3e094b759 100644 --- a/tests/ui/unused_io_amount.rs +++ b/tests/ui/unused_io_amount.rs @@ -63,6 +63,14 @@ fn combine_or(file: &str) -> Result<(), Error> { Ok(()) } +fn is_ok_err<T: io::Read + io::Write>(s: &mut T) { + s.write(b"ok").is_ok(); + s.write(b"err").is_err(); + let mut buf = [0u8; 0]; + s.read(&mut buf).is_ok(); + s.read(&mut buf).is_err(); +} + async fn bad_async_write<W: AsyncWrite + Unpin>(w: &mut W) { w.write(b"hello world").await.unwrap(); } diff --git a/tests/ui/unused_io_amount.stderr b/tests/ui/unused_io_amount.stderr index 7ba7e09c0f0..0865c5213f6 100644 --- a/tests/ui/unused_io_amount.stderr +++ b/tests/ui/unused_io_amount.stderr @@ -82,13 +82,45 @@ LL | | .expect("error"); error: written amount is not handled --> $DIR/unused_io_amount.rs:67:5 | +LL | s.write(b"ok").is_ok(); + | ^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Write::write_all` instead, or handle partial writes + +error: written amount is not handled + --> $DIR/unused_io_amount.rs:68:5 + | +LL | s.write(b"err").is_err(); + | ^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Write::write_all` instead, or handle partial writes + +error: read amount is not handled + --> $DIR/unused_io_amount.rs:70:5 + | +LL | s.read(&mut buf).is_ok(); + | ^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Read::read_exact` instead, or handle partial reads + +error: read amount is not handled + --> $DIR/unused_io_amount.rs:71:5 + | +LL | s.read(&mut buf).is_err(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Read::read_exact` instead, or handle partial reads + +error: written amount is not handled + --> $DIR/unused_io_amount.rs:75:5 + | LL | w.write(b"hello world").await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: use `AsyncWriteExt::write_all` instead, or handle partial writes error: read amount is not handled - --> $DIR/unused_io_amount.rs:72:5 + --> $DIR/unused_io_amount.rs:80:5 | LL | r.read(&mut buf[..]).await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -96,7 +128,7 @@ LL | r.read(&mut buf[..]).await.unwrap(); = help: use `AsyncReadExt::read_exact` instead, or handle partial reads error: written amount is not handled - --> $DIR/unused_io_amount.rs:85:9 + --> $DIR/unused_io_amount.rs:93:9 | LL | w.write(b"hello world").await?; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -104,7 +136,7 @@ LL | w.write(b"hello world").await?; = help: use `AsyncWriteExt::write_all` instead, or handle partial writes error: read amount is not handled - --> $DIR/unused_io_amount.rs:93:9 + --> $DIR/unused_io_amount.rs:101:9 | LL | r.read(&mut buf[..]).await.or(Err(Error::Kind))?; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -112,7 +144,7 @@ LL | r.read(&mut buf[..]).await.or(Err(Error::Kind))?; = help: use `AsyncReadExt::read_exact` instead, or handle partial reads error: written amount is not handled - --> $DIR/unused_io_amount.rs:101:5 + --> $DIR/unused_io_amount.rs:109:5 | LL | w.write(b"hello world").await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -120,12 +152,12 @@ LL | w.write(b"hello world").await.unwrap(); = help: use `AsyncWriteExt::write_all` instead, or handle partial writes error: read amount is not handled - --> $DIR/unused_io_amount.rs:106:5 + --> $DIR/unused_io_amount.rs:114:5 | LL | r.read(&mut buf[..]).await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: use `AsyncReadExt::read_exact` instead, or handle partial reads -error: aborting due to 16 previous errors +error: aborting due to 20 previous errors |