diff options
4 files changed, 70 insertions, 1 deletions
diff --git a/compiler/rustc_lint/src/unused.rs b/compiler/rustc_lint/src/unused.rs index 12d5b5cf979..1a007250961 100644 --- a/compiler/rustc_lint/src/unused.rs +++ b/compiler/rustc_lint/src/unused.rs @@ -804,7 +804,15 @@ trait UnusedDelimLint { .find_ancestor_inside(value.span) .map(|span| (value.span.with_hi(span.lo()), value.span.with_lo(span.hi()))), ast::ExprKind::Paren(ref expr) => { - expr.span.find_ancestor_inside(value.span).map(|expr_span| { + // For the expr with attributes, like `let _ = (#[inline] || println!("Hello!"));`, + // the span should contains the attributes, or the suggestion will remove them. + let expr_span_with_attrs = + if let Some(attr_lo) = expr.attrs.iter().map(|attr| attr.span.lo()).min() { + expr.span.with_lo(attr_lo) + } else { + expr.span + }; + expr_span_with_attrs.find_ancestor_inside(value.span).map(|expr_span| { (value.span.with_hi(expr_span.lo()), value.span.with_lo(expr_span.hi())) }) } diff --git a/tests/ui/lint/unused/unused-parens-for-stmt-expr-attributes-issue-129833.fixed b/tests/ui/lint/unused/unused-parens-for-stmt-expr-attributes-issue-129833.fixed new file mode 100644 index 00000000000..8287b3d3ac7 --- /dev/null +++ b/tests/ui/lint/unused/unused-parens-for-stmt-expr-attributes-issue-129833.fixed @@ -0,0 +1,15 @@ +//@ run-rustfix +// Check the `unused_parens` suggestion for paren_expr with attributes. +// The suggestion should retain attributes in the front. + +#![feature(stmt_expr_attributes)] +#![deny(unused_parens)] + +pub fn foo() -> impl Fn() { + let _ = #[inline] #[allow(dead_code)] || println!("Hello!"); //~ERROR unnecessary parentheses + #[inline] #[allow(dead_code)] || println!("Hello!") //~ERROR unnecessary parentheses +} + +fn main() { + let _ = foo(); +} diff --git a/tests/ui/lint/unused/unused-parens-for-stmt-expr-attributes-issue-129833.rs b/tests/ui/lint/unused/unused-parens-for-stmt-expr-attributes-issue-129833.rs new file mode 100644 index 00000000000..0b6edae30e7 --- /dev/null +++ b/tests/ui/lint/unused/unused-parens-for-stmt-expr-attributes-issue-129833.rs @@ -0,0 +1,15 @@ +//@ run-rustfix +// Check the `unused_parens` suggestion for paren_expr with attributes. +// The suggestion should retain attributes in the front. + +#![feature(stmt_expr_attributes)] +#![deny(unused_parens)] + +pub fn foo() -> impl Fn() { + let _ = (#[inline] #[allow(dead_code)] || println!("Hello!")); //~ERROR unnecessary parentheses + (#[inline] #[allow(dead_code)] || println!("Hello!")) //~ERROR unnecessary parentheses +} + +fn main() { + let _ = foo(); +} diff --git a/tests/ui/lint/unused/unused-parens-for-stmt-expr-attributes-issue-129833.stderr b/tests/ui/lint/unused/unused-parens-for-stmt-expr-attributes-issue-129833.stderr new file mode 100644 index 00000000000..65513553f7e --- /dev/null +++ b/tests/ui/lint/unused/unused-parens-for-stmt-expr-attributes-issue-129833.stderr @@ -0,0 +1,31 @@ +error: unnecessary parentheses around assigned value + --> $DIR/unused-parens-for-stmt-expr-attributes-issue-129833.rs:9:13 + | +LL | let _ = (#[inline] #[allow(dead_code)] || println!("Hello!")); + | ^ ^ + | +note: the lint level is defined here + --> $DIR/unused-parens-for-stmt-expr-attributes-issue-129833.rs:6:9 + | +LL | #![deny(unused_parens)] + | ^^^^^^^^^^^^^ +help: remove these parentheses + | +LL - let _ = (#[inline] #[allow(dead_code)] || println!("Hello!")); +LL + let _ = #[inline] #[allow(dead_code)] || println!("Hello!"); + | + +error: unnecessary parentheses around block return value + --> $DIR/unused-parens-for-stmt-expr-attributes-issue-129833.rs:10:5 + | +LL | (#[inline] #[allow(dead_code)] || println!("Hello!")) + | ^ ^ + | +help: remove these parentheses + | +LL - (#[inline] #[allow(dead_code)] || println!("Hello!")) +LL + #[inline] #[allow(dead_code)] || println!("Hello!") + | + +error: aborting due to 2 previous errors + |