diff options
| -rw-r--r-- | clippy_lints/src/matches/infallible_destructuring_match.rs | 7 | ||||
| -rw-r--r-- | tests/ui/infallible_destructuring_match.fixed | 12 | ||||
| -rw-r--r-- | tests/ui/infallible_destructuring_match.rs | 14 | ||||
| -rw-r--r-- | tests/ui/infallible_destructuring_match.stderr | 16 |
4 files changed, 42 insertions, 7 deletions
diff --git a/clippy_lints/src/matches/infallible_destructuring_match.rs b/clippy_lints/src/matches/infallible_destructuring_match.rs index 2472acb6f6e..d18c92caba2 100644 --- a/clippy_lints/src/matches/infallible_destructuring_match.rs +++ b/clippy_lints/src/matches/infallible_destructuring_match.rs @@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint_and_sugg; use clippy_utils::source::snippet_with_applicability; use clippy_utils::{path_to_local_id, peel_blocks, strip_pat_refs}; use rustc_errors::Applicability; -use rustc_hir::{ExprKind, Local, MatchSource, PatKind, QPath}; +use rustc_hir::{ByRef, ExprKind, Local, MatchSource, PatKind, QPath}; use rustc_lint::LateContext; use super::INFALLIBLE_DESTRUCTURING_MATCH; @@ -16,7 +16,7 @@ pub(crate) fn check(cx: &LateContext<'_>, local: &Local<'_>) -> bool { if let PatKind::TupleStruct( QPath::Resolved(None, variant_name), args, _) = arms[0].pat.kind; if args.len() == 1; - if let PatKind::Binding(_, arg, ..) = strip_pat_refs(&args[0]).kind; + if let PatKind::Binding(binding, arg, ..) = strip_pat_refs(&args[0]).kind; let body = peel_blocks(arms[0].body); if path_to_local_id(body, arg); @@ -30,8 +30,9 @@ pub(crate) fn check(cx: &LateContext<'_>, local: &Local<'_>) -> bool { Consider using `let`", "try this", format!( - "let {}({}) = {};", + "let {}({}{}) = {};", snippet_with_applicability(cx, variant_name.span, "..", &mut applicability), + if binding.0 == ByRef::Yes { "ref " } else { "" }, snippet_with_applicability(cx, local.pat.span, "..", &mut applicability), snippet_with_applicability(cx, target.span, "..", &mut applicability), ), diff --git a/tests/ui/infallible_destructuring_match.fixed b/tests/ui/infallible_destructuring_match.fixed index b8e40d99553..61985e56b76 100644 --- a/tests/ui/infallible_destructuring_match.fixed +++ b/tests/ui/infallible_destructuring_match.fixed @@ -9,6 +9,9 @@ enum SingleVariantEnum { struct TupleStruct(i32); +struct NonCopy; +struct TupleStructWithNonCopy(NonCopy); + enum EmptyEnum {} macro_rules! match_enum { @@ -71,6 +74,15 @@ fn infallible_destructuring_match_struct() { let TupleStruct(data) = wrapper; } +fn infallible_destructuring_match_struct_with_noncopy() { + let wrapper = TupleStructWithNonCopy(NonCopy); + + // This should lint! (keeping `ref` in the suggestion) + let TupleStructWithNonCopy(ref data) = wrapper; + + let TupleStructWithNonCopy(ref data) = wrapper; +} + macro_rules! match_never_enum { ($param:expr) => { let data = match $param { diff --git a/tests/ui/infallible_destructuring_match.rs b/tests/ui/infallible_destructuring_match.rs index 106cd438b90..f2768245bbc 100644 --- a/tests/ui/infallible_destructuring_match.rs +++ b/tests/ui/infallible_destructuring_match.rs @@ -9,6 +9,9 @@ enum SingleVariantEnum { struct TupleStruct(i32); +struct NonCopy; +struct TupleStructWithNonCopy(NonCopy); + enum EmptyEnum {} macro_rules! match_enum { @@ -75,6 +78,17 @@ fn infallible_destructuring_match_struct() { let TupleStruct(data) = wrapper; } +fn infallible_destructuring_match_struct_with_noncopy() { + let wrapper = TupleStructWithNonCopy(NonCopy); + + // This should lint! (keeping `ref` in the suggestion) + let data = match wrapper { + TupleStructWithNonCopy(ref n) => n, + }; + + let TupleStructWithNonCopy(ref data) = wrapper; +} + macro_rules! match_never_enum { ($param:expr) => { let data = match $param { diff --git a/tests/ui/infallible_destructuring_match.stderr b/tests/ui/infallible_destructuring_match.stderr index 1b78db42014..f8a50f0223d 100644 --- a/tests/ui/infallible_destructuring_match.stderr +++ b/tests/ui/infallible_destructuring_match.stderr @@ -1,5 +1,5 @@ error: you seem to be trying to use `match` to destructure a single infallible pattern. Consider using `let` - --> $DIR/infallible_destructuring_match.rs:26:5 + --> $DIR/infallible_destructuring_match.rs:29:5 | LL | / let data = match wrapper { LL | | SingleVariantEnum::Variant(i) => i, @@ -9,7 +9,7 @@ LL | | }; = note: `-D clippy::infallible-destructuring-match` implied by `-D warnings` error: you seem to be trying to use `match` to destructure a single infallible pattern. Consider using `let` - --> $DIR/infallible_destructuring_match.rs:58:5 + --> $DIR/infallible_destructuring_match.rs:61:5 | LL | / let data = match wrapper { LL | | TupleStruct(i) => i, @@ -17,12 +17,20 @@ LL | | }; | |______^ help: try this: `let TupleStruct(data) = wrapper;` error: you seem to be trying to use `match` to destructure a single infallible pattern. Consider using `let` - --> $DIR/infallible_destructuring_match.rs:90:5 + --> $DIR/infallible_destructuring_match.rs:85:5 + | +LL | / let data = match wrapper { +LL | | TupleStructWithNonCopy(ref n) => n, +LL | | }; + | |______^ help: try this: `let TupleStructWithNonCopy(ref data) = wrapper;` + +error: you seem to be trying to use `match` to destructure a single infallible pattern. Consider using `let` + --> $DIR/infallible_destructuring_match.rs:104:5 | LL | / let data = match wrapper { LL | | Ok(i) => i, LL | | }; | |______^ help: try this: `let Ok(data) = wrapper;` -error: aborting due to 3 previous errors +error: aborting due to 4 previous errors |