use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
use rustc::{declare_tool_lint, lint_array};
-/// **What it does:** Checks for unused written/read amount.
-///
-/// **Why is this bad?** `io::Write::write` and `io::Read::read` are not
-/// guaranteed to
-/// process the entire buffer. They return how many bytes were processed, which
-/// might be smaller
-/// than a given buffer's length. If you don't need to deal with
-/// partial-write/read, use
-/// `write_all`/`read_exact` instead.
-///
-/// **Known problems:** Detects only common patterns.
-///
-/// **Example:**
-/// ```rust,ignore
-/// use std::io;
-/// fn foo<W: io::Write>(w: &mut W) -> io::Result<()> {
-/// // must be `w.write_all(b"foo")?;`
-/// w.write(b"foo")?;
-/// Ok(())
-/// }
-/// ```
declare_clippy_lint! {
+ /// **What it does:** Checks for unused written/read amount.
+ ///
+ /// **Why is this bad?** `io::Write::write` and `io::Read::read` are not
+ /// guaranteed to
+ /// process the entire buffer. They return how many bytes were processed, which
+ /// might be smaller
+ /// than a given buffer's length. If you don't need to deal with
+ /// partial-write/read, use
+ /// `write_all`/`read_exact` instead.
+ ///
+ /// **Known problems:** Detects only common patterns.
+ ///
+ /// **Example:**
+ /// ```rust,ignore
+ /// use std::io;
+ /// fn foo<W: io::Write>(w: &mut W) -> io::Result<()> {
+ /// // must be `w.write_all(b"foo")?;`
+ /// w.write(b"foo")?;
+ /// Ok(())
+ /// }
+ /// ```
pub UNUSED_IO_AMOUNT,
correctness,
"unused written/read amount"
};
match expr.node {
- hir::ExprKind::Match(ref res, _, _) if is_try(expr).is_some() => {
+ hir::ExprKind::Match(ref res, _, _) if is_try(cx, expr).is_some() => {
if let hir::ExprKind::Call(ref func, ref args) = res.node {
if let hir::ExprKind::Path(ref path) = func.node {
if match_qpath(path, &paths::TRY_INTO_RESULT) && args.len() == 1 {