diff options
Diffstat (limited to 'tests')
29 files changed, 925 insertions, 406 deletions
diff --git a/tests/ui-internal/disallow_struct_span_lint.rs b/tests/ui-internal/disallow_struct_span_lint.rs new file mode 100644 index 00000000000..3155c0235ff --- /dev/null +++ b/tests/ui-internal/disallow_struct_span_lint.rs @@ -0,0 +1,27 @@ +#![feature(rustc_private)] + +extern crate rustc_errors; +extern crate rustc_hir; +extern crate rustc_lint; +extern crate rustc_middle; + +use rustc_errors::{DiagnosticMessage, MultiSpan}; +use rustc_hir::hir_id::HirId; +use rustc_lint::{Lint, LintContext}; +use rustc_middle::ty::TyCtxt; + +pub fn a(cx: impl LintContext, lint: &'static Lint, span: impl Into<MultiSpan>, msg: impl Into<DiagnosticMessage>) { + cx.struct_span_lint(lint, span, msg, |b| b); +} + +pub fn b( + tcx: TyCtxt<'_>, + lint: &'static Lint, + hir_id: HirId, + span: impl Into<MultiSpan>, + msg: impl Into<DiagnosticMessage>, +) { + tcx.struct_span_lint_hir(lint, hir_id, span, msg, |b| b); +} + +fn main() {} diff --git a/tests/ui-internal/disallow_struct_span_lint.stderr b/tests/ui-internal/disallow_struct_span_lint.stderr new file mode 100644 index 00000000000..76c487fb135 --- /dev/null +++ b/tests/ui-internal/disallow_struct_span_lint.stderr @@ -0,0 +1,17 @@ +error: use of a disallowed method `rustc_lint::context::LintContext::struct_span_lint` + --> $DIR/disallow_struct_span_lint.rs:14:5 + | +LL | cx.struct_span_lint(lint, span, msg, |b| b); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: `-D clippy::disallowed-methods` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::disallowed_methods)]` + +error: use of a disallowed method `rustc_middle::ty::context::TyCtxt::struct_span_lint_hir` + --> $DIR/disallow_struct_span_lint.rs:24:5 + | +LL | tcx.struct_span_lint_hir(lint, hir_id, span, msg, |b| b); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: aborting due to 2 previous errors + diff --git a/tests/ui-internal/if_chain_style.rs b/tests/ui-internal/if_chain_style.rs deleted file mode 100644 index b462b20e04c..00000000000 --- a/tests/ui-internal/if_chain_style.rs +++ /dev/null @@ -1,97 +0,0 @@ -#![warn(clippy::if_chain_style)] -#![allow( - clippy::needless_if, - clippy::no_effect, - clippy::nonminimal_bool, - clippy::missing_clippy_version_attribute -)] - -extern crate if_chain; - -use if_chain::if_chain; - -fn main() { - if true { - let x = ""; - // `if_chain!` inside `if` - if_chain! { - if true; - if true; - then {} - } - } - if_chain! { - if true - // multi-line AND'ed conditions - && false; - if let Some(1) = Some(1); - // `let` before `then` - let x = ""; - then { - (); - } - } - if_chain! { - // single `if` condition - if true; - then { - let x = ""; - // nested if - if true {} - } - } - if_chain! { - // starts with `let ..` - let x = ""; - if let Some(1) = Some(1); - then { - let x = ""; - let x = ""; - // nested if_chain! - if_chain! { - if true; - if true; - then {} - } - } - } -} - -fn negative() { - if true { - (); - if_chain! { - if true; - if true; - then { (); } - } - } - if_chain! { - if true; - let x = ""; - if true; - then { (); } - } - if_chain! { - if true; - if true; - then { - if true { 1 } else { 2 } - } else { - 3 - } - }; - if true { - if_chain! { - if true; - if true; - then {} - } - } else if false { - if_chain! { - if true; - if false; - then {} - } - } -} diff --git a/tests/ui-internal/if_chain_style.stderr b/tests/ui-internal/if_chain_style.stderr deleted file mode 100644 index ea04955323d..00000000000 --- a/tests/ui-internal/if_chain_style.stderr +++ /dev/null @@ -1,86 +0,0 @@ -error: this `if` can be part of the inner `if_chain!` - --> $DIR/if_chain_style.rs:14:5 - | -LL | / if true { -LL | | let x = ""; -LL | | // `if_chain!` inside `if` -LL | | if_chain! { -... | -LL | | } -LL | | } - | |_____^ - | -help: this `let` statement can also be in the `if_chain!` - --> $DIR/if_chain_style.rs:15:9 - | -LL | let x = ""; - | ^^^^^^^^^^^ - = note: `-D clippy::if-chain-style` implied by `-D warnings` - = help: to override `-D warnings` add `#[allow(clippy::if_chain_style)]` - -error: `if a && b;` should be `if a; if b;` - --> $DIR/if_chain_style.rs:24:12 - | -LL | if true - | ____________^ -LL | | // multi-line AND'ed conditions -LL | | && false; - | |____________________^ - -error: `let` expression should be inside `then { .. }` - --> $DIR/if_chain_style.rs:29:9 - | -LL | let x = ""; - | ^^^^^^^^^^^ - -error: this `if` can be part of the outer `if_chain!` - --> $DIR/if_chain_style.rs:40:13 - | -LL | if true {} - | ^^^^^^^^^^ - | -help: this `let` statement can also be in the `if_chain!` - --> $DIR/if_chain_style.rs:38:13 - | -LL | let x = ""; - | ^^^^^^^^^^^ - -error: `if_chain!` only has one `if` - --> $DIR/if_chain_style.rs:34:5 - | -LL | / if_chain! { -LL | | // single `if` condition -LL | | if true; -LL | | then { -... | -LL | | } -LL | | } - | |_____^ - | - = note: this error originates in the macro `__if_chain` which comes from the expansion of the macro `if_chain` (in Nightly builds, run with -Z macro-backtrace for more info) - -error: `let` expression should be above the `if_chain!` - --> $DIR/if_chain_style.rs:45:9 - | -LL | let x = ""; - | ^^^^^^^^^^^ - -error: this `if_chain!` can be merged with the outer `if_chain!` - --> $DIR/if_chain_style.rs:51:13 - | -LL | / if_chain! { -LL | | if true; -LL | | if true; -LL | | then {} -LL | | } - | |_____________^ - | -help: these `let` statements can also be in the `if_chain!` - --> $DIR/if_chain_style.rs:48:13 - | -LL | / let x = ""; -LL | | let x = ""; - | |_______________________^ - -error: aborting due to 7 previous errors - diff --git a/tests/ui/arc_with_non_send_sync.rs b/tests/ui/arc_with_non_send_sync.rs index d03a577c454..349e81912e3 100644 --- a/tests/ui/arc_with_non_send_sync.rs +++ b/tests/ui/arc_with_non_send_sync.rs @@ -33,16 +33,16 @@ fn main() { let _ = Arc::new(42); let _ = Arc::new(RefCell::new(42)); - //~^ ERROR: usage of an `Arc` that is not `Send` or `Sync` + //~^ ERROR: usage of an `Arc` that is not `Send` and `Sync` //~| NOTE: the trait `Sync` is not implemented for `RefCell<i32>` let mutex = Mutex::new(1); let _ = Arc::new(mutex.lock().unwrap()); - //~^ ERROR: usage of an `Arc` that is not `Send` or `Sync` + //~^ ERROR: usage of an `Arc` that is not `Send` and `Sync` //~| NOTE: the trait `Send` is not implemented for `MutexGuard<'_, i32>` let _ = Arc::new(&42 as *const i32); - //~^ ERROR: usage of an `Arc` that is not `Send` or `Sync` + //~^ ERROR: usage of an `Arc` that is not `Send` and `Sync` //~| NOTE: the trait `Send` is not implemented for `*const i32` //~| NOTE: the trait `Sync` is not implemented for `*const i32` } diff --git a/tests/ui/arc_with_non_send_sync.stderr b/tests/ui/arc_with_non_send_sync.stderr index fd239580d28..a7f91abda4e 100644 --- a/tests/ui/arc_with_non_send_sync.stderr +++ b/tests/ui/arc_with_non_send_sync.stderr @@ -1,35 +1,41 @@ -error: usage of an `Arc` that is not `Send` or `Sync` +error: usage of an `Arc` that is not `Send` and `Sync` --> $DIR/arc_with_non_send_sync.rs:35:13 | LL | let _ = Arc::new(RefCell::new(42)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = note: the trait `Sync` is not implemented for `RefCell<i32>` - = note: required for `Arc<RefCell<i32>>` to implement `Send` and `Sync` - = help: consider using an `Rc` instead or wrapping the inner type with a `Mutex` + = note: `Arc<RefCell<i32>>` is not `Send` and `Sync` as: + = note: - the trait `Sync` is not implemented for `RefCell<i32>` + = help: consider using an `Rc` instead. `Arc` does not provide benefits for non `Send` and `Sync` types + = note: if you intend to use `Arc` with `Send` and `Sync` traits + = note: wrap the inner type with a `Mutex` or implement `Send` and `Sync` for `RefCell<i32>` = note: `-D clippy::arc-with-non-send-sync` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::arc_with_non_send_sync)]` -error: usage of an `Arc` that is not `Send` or `Sync` +error: usage of an `Arc` that is not `Send` and `Sync` --> $DIR/arc_with_non_send_sync.rs:40:13 | LL | let _ = Arc::new(mutex.lock().unwrap()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = note: the trait `Send` is not implemented for `MutexGuard<'_, i32>` - = note: required for `Arc<MutexGuard<'_, i32>>` to implement `Send` and `Sync` - = help: consider using an `Rc` instead or wrapping the inner type with a `Mutex` + = note: `Arc<MutexGuard<'_, i32>>` is not `Send` and `Sync` as: + = note: - the trait `Send` is not implemented for `MutexGuard<'_, i32>` + = help: consider using an `Rc` instead. `Arc` does not provide benefits for non `Send` and `Sync` types + = note: if you intend to use `Arc` with `Send` and `Sync` traits + = note: wrap the inner type with a `Mutex` or implement `Send` and `Sync` for `MutexGuard<'_, i32>` -error: usage of an `Arc` that is not `Send` or `Sync` +error: usage of an `Arc` that is not `Send` and `Sync` --> $DIR/arc_with_non_send_sync.rs:44:13 | LL | let _ = Arc::new(&42 as *const i32); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = note: the trait `Send` is not implemented for `*const i32` - = note: the trait `Sync` is not implemented for `*const i32` - = note: required for `Arc<*const i32>` to implement `Send` and `Sync` - = help: consider using an `Rc` instead or wrapping the inner type with a `Mutex` + = note: `Arc<*const i32>` is not `Send` and `Sync` as: + = note: - the trait `Send` is not implemented for `*const i32` + = note: - the trait `Sync` is not implemented for `*const i32` + = help: consider using an `Rc` instead. `Arc` does not provide benefits for non `Send` and `Sync` types + = note: if you intend to use `Arc` with `Send` and `Sync` traits + = note: wrap the inner type with a `Mutex` or implement `Send` and `Sync` for `*const i32` error: aborting due to 3 previous errors diff --git a/tests/ui/crashes/ice-11230.rs b/tests/ui/crashes/ice-11230.rs new file mode 100644 index 00000000000..5761882273e --- /dev/null +++ b/tests/ui/crashes/ice-11230.rs @@ -0,0 +1,6 @@ +/// Test for https://github.com/rust-lang/rust-clippy/issues/11230 + +fn main() { + const A: &[for<'a> fn(&'a ())] = &[]; + for v in A.iter() {} +} diff --git a/tests/ui/crashes/ice-11803.rs b/tests/ui/crashes/ice-11803.rs new file mode 100644 index 00000000000..1bb8bf0c746 --- /dev/null +++ b/tests/ui/crashes/ice-11803.rs @@ -0,0 +1,9 @@ +//@no-rustfix + +#![warn(clippy::impl_trait_in_params)] + +pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>>() { + extern "C" fn implementation_detail() {} +} + +fn main() {} diff --git a/tests/ui/crashes/ice-11803.stderr b/tests/ui/crashes/ice-11803.stderr new file mode 100644 index 00000000000..b8289048a8b --- /dev/null +++ b/tests/ui/crashes/ice-11803.stderr @@ -0,0 +1,26 @@ +error: `impl Trait` used as a function parameter + --> $DIR/ice-11803.rs:5:54 + | +LL | pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>>() { + | ^^^^^^^^^^ + | + = note: `-D clippy::impl-trait-in-params` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::impl_trait_in_params)]` +help: add a type parameter + | +LL | pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>, { /* Generic name */ }: Clone>() { + | +++++++++++++++++++++++++++++++ + +error: `impl Trait` used as a function parameter + --> $DIR/ice-11803.rs:5:33 + | +LL | pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>>() { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: add a type parameter + | +LL | pub fn g<T: IntoIterator<Item = impl Iterator<Item = impl Clone>>, { /* Generic name */ }: Iterator<Item = impl Clone>>() { + | +++++++++++++++++++++++++++++++++++++++++++++++++++++ + +error: aborting due to 2 previous errors + diff --git a/tests/ui/explicit_auto_deref.fixed b/tests/ui/explicit_auto_deref.fixed index 12158d0d12a..e6ca4bb66cc 100644 --- a/tests/ui/explicit_auto_deref.fixed +++ b/tests/ui/explicit_auto_deref.fixed @@ -301,24 +301,47 @@ fn main() { }; // Issue #11474 - pub struct Variant { - pub anonymous: Variant0, + #[derive(Clone, Copy)] + struct Wrap<T>(T); + impl<T> core::ops::Deref for Wrap<T> { + type Target = T; + fn deref(&self) -> &T { + &self.0 + } } - - pub union Variant0 { - pub anonymous: std::mem::ManuallyDrop<Variant00>, + impl<T> core::ops::DerefMut for Wrap<T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.0 + } } - pub struct Variant00 { - pub anonymous: Variant000, + union U<T: Copy> { + u: T, } - pub union Variant000 { - pub val: i32, + #[derive(Clone, Copy)] + struct S8 { + x: &'static str, } unsafe { - let mut p = core::mem::zeroed::<Variant>(); - (*p.anonymous.anonymous).anonymous.val = 1; + let mut x = U { + u: core::mem::ManuallyDrop::new(S8 { x: "" }), + }; + let _ = &mut (*x.u).x; + let _ = &mut { x.u }.x; + let _ = &mut ({ *x.u }).x; + + let mut x = U { + u: Wrap(core::mem::ManuallyDrop::new(S8 { x: "" })), + }; + let _ = &mut (*x.u).x; + let _ = &mut { x.u }.x; + let _ = &mut ({ **x.u }).x; + + let mut x = U { u: Wrap(S8 { x: "" }) }; + let _ = &mut x.u.x; + let _ = &mut { x.u }.x; + let _ = &mut ({ *x.u }).x; } } diff --git a/tests/ui/explicit_auto_deref.rs b/tests/ui/explicit_auto_deref.rs index dec021c1834..7531e1f87b7 100644 --- a/tests/ui/explicit_auto_deref.rs +++ b/tests/ui/explicit_auto_deref.rs @@ -301,24 +301,47 @@ fn main() { }; // Issue #11474 - pub struct Variant { - pub anonymous: Variant0, + #[derive(Clone, Copy)] + struct Wrap<T>(T); + impl<T> core::ops::Deref for Wrap<T> { + type Target = T; + fn deref(&self) -> &T { + &self.0 + } } - - pub union Variant0 { - pub anonymous: std::mem::ManuallyDrop<Variant00>, + impl<T> core::ops::DerefMut for Wrap<T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.0 + } } - pub struct Variant00 { - pub anonymous: Variant000, + union U<T: Copy> { + u: T, } - pub union Variant000 { - pub val: i32, + #[derive(Clone, Copy)] + struct S8 { + x: &'static str, } unsafe { - let mut p = core::mem::zeroed::<Variant>(); - (*p.anonymous.anonymous).anonymous.val = 1; + let mut x = U { + u: core::mem::ManuallyDrop::new(S8 { x: "" }), + }; + let _ = &mut (*x.u).x; + let _ = &mut (*{ x.u }).x; + let _ = &mut ({ *x.u }).x; + + let mut x = U { + u: Wrap(core::mem::ManuallyDrop::new(S8 { x: "" })), + }; + let _ = &mut (**x.u).x; + let _ = &mut (**{ x.u }).x; + let _ = &mut ({ **x.u }).x; + + let mut x = U { u: Wrap(S8 { x: "" }) }; + let _ = &mut (*x.u).x; + let _ = &mut (*{ x.u }).x; + let _ = &mut ({ *x.u }).x; } } diff --git a/tests/ui/explicit_auto_deref.stderr b/tests/ui/explicit_auto_deref.stderr index 3d2a7b0d9f4..cc9eeeb5042 100644 --- a/tests/ui/explicit_auto_deref.stderr +++ b/tests/ui/explicit_auto_deref.stderr @@ -241,5 +241,35 @@ error: deref which would be done by auto-deref LL | Some(x) => &mut *x, | ^^^^^^^ help: try: `x` -error: aborting due to 40 previous errors +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:332:22 + | +LL | let _ = &mut (*{ x.u }).x; + | ^^^^^^^^^^ help: try: `{ x.u }` + +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:338:22 + | +LL | let _ = &mut (**x.u).x; + | ^^^^^^^ help: try: `(*x.u)` + +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:339:22 + | +LL | let _ = &mut (**{ x.u }).x; + | ^^^^^^^^^^^ help: try: `{ x.u }` + +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:343:22 + | +LL | let _ = &mut (*x.u).x; + | ^^^^^^ help: try: `x.u` + +error: deref which would be done by auto-deref + --> $DIR/explicit_auto_deref.rs:344:22 + | +LL | let _ = &mut (*{ x.u }).x; + | ^^^^^^^^^^ help: try: `{ x.u }` + +error: aborting due to 45 previous errors diff --git a/tests/ui/iter_over_hash_type.rs b/tests/ui/iter_over_hash_type.rs new file mode 100644 index 00000000000..7000c8bf96f --- /dev/null +++ b/tests/ui/iter_over_hash_type.rs @@ -0,0 +1,74 @@ +//@aux-build:proc_macros.rs +#![feature(rustc_private)] +#![warn(clippy::iter_over_hash_type)] +use std::collections::{HashMap, HashSet}; + +extern crate rustc_data_structures; + +extern crate proc_macros; + +fn main() { + let mut hash_set = HashSet::<i32>::new(); + let mut hash_map = HashMap::<i32, i32>::new(); + let mut fx_hash_map = rustc_data_structures::fx::FxHashMap::<i32, i32>::default(); + let mut fx_hash_set = rustc_data_structures::fx::FxHashMap::<i32, i32>::default(); + let vec = Vec::<i32>::new(); + + // test hashset + for x in &hash_set { + let _ = x; + } + for x in hash_set.iter() { + let _ = x; + } + for x in hash_set.clone() { + let _ = x; + } + for x in hash_set.drain() { + let _ = x; + } + + // test hashmap + for (x, y) in &hash_map { + let _ = (x, y); + } + for x in hash_map.keys() { + let _ = x; + } + for x in hash_map.values() { + let _ = x; + } + for x in hash_map.values_mut() { + *x += 1; + } + for x in hash_map.iter() { + let _ = x; + } + for x in hash_map.clone() { + let _ = x; + } + for x in hash_map.drain() { + let _ = x; + } + + // test type-aliased hashers + for x in fx_hash_set { + let _ = x; + } + for x in fx_hash_map { + let _ = x; + } + + // shouldnt fire + for x in &vec { + let _ = x; + } + for x in vec { + let _ = x; + } + + // should not lint, this comes from an external crate + proc_macros::external! { + for _ in HashMap::<i32, i32>::new() {} + } +} diff --git a/tests/ui/iter_over_hash_type.stderr b/tests/ui/iter_over_hash_type.stderr new file mode 100644 index 00000000000..cf420fb8e99 --- /dev/null +++ b/tests/ui/iter_over_hash_type.stderr @@ -0,0 +1,109 @@ +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:18:5 + | +LL | / for x in &hash_set { +LL | | let _ = x; +LL | | } + | |_____^ + | + = note: `-D clippy::iter-over-hash-type` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::iter_over_hash_type)]` + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:21:5 + | +LL | / for x in hash_set.iter() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:24:5 + | +LL | / for x in hash_set.clone() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:27:5 + | +LL | / for x in hash_set.drain() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:32:5 + | +LL | / for (x, y) in &hash_map { +LL | | let _ = (x, y); +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:35:5 + | +LL | / for x in hash_map.keys() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:38:5 + | +LL | / for x in hash_map.values() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:41:5 + | +LL | / for x in hash_map.values_mut() { +LL | | *x += 1; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:44:5 + | +LL | / for x in hash_map.iter() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:47:5 + | +LL | / for x in hash_map.clone() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:50:5 + | +LL | / for x in hash_map.drain() { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:55:5 + | +LL | / for x in fx_hash_set { +LL | | let _ = x; +LL | | } + | |_____^ + +error: iteration over unordered hash-based type + --> $DIR/iter_over_hash_type.rs:58:5 + | +LL | / for x in fx_hash_map { +LL | | let _ = x; +LL | | } + | |_____^ + +error: aborting due to 13 previous errors + diff --git a/tests/ui/manual_let_else.rs b/tests/ui/manual_let_else.rs index 27717ab3a73..5d94660ec89 100644 --- a/tests/ui/manual_let_else.rs +++ b/tests/ui/manual_let_else.rs @@ -5,7 +5,9 @@ clippy::let_unit_value, clippy::match_single_binding, clippy::never_loop, - clippy::needless_if + clippy::needless_if, + clippy::diverging_sub_expression, + clippy::single_match )] #![warn(clippy::manual_let_else)] //@no-rustfix @@ -24,7 +26,7 @@ fn main() {} fn fire() { let v = if let Some(v_some) = g() { v_some } else { return }; //~^ ERROR: this could be rewritten as `let...else` - //~| NOTE: `-D clippy::manual-let-else` implied by `-D warnings` + let v = if let Some(v_some) = g() { //~^ ERROR: this could be rewritten as `let...else` v_some @@ -79,22 +81,76 @@ fn fire() { panic!(); }; + // The final expression will need to be turned into a statement. + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + panic!(); + () + }; + + // Even if the result is buried multiple expressions deep. + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + panic!(); + if true { + match 0 { + 0 => (), + _ => (), + } + } else { + panic!() + } + }; + + // Or if a break gives the value. + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + loop { + panic!(); + break (); + } + }; + + // Even if the break is in a weird position. + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + 'a: loop { + panic!(); + loop { + match 0 { + 0 if (return break 'a ()) => {}, + _ => {}, + } + } + } + }; + // A match diverges if all branches diverge: - // Note: the corresponding let-else requires a ; at the end of the match - // as otherwise the type checker does not turn it into a ! type. let v = if let Some(v_some) = g() { //~^ ERROR: this could be rewritten as `let...else` v_some } else { - match () { - _ if panic!() => {}, + match 0 { + 0 if true => panic!(), _ => panic!(), - } + }; }; // An if's expression can cause divergence: - let v = if let Some(v_some) = g() { v_some } else { if panic!() {} }; - //~^ ERROR: this could be rewritten as `let...else` + let v = if let Some(v_some) = g() { + //~^ ERROR: this could be rewritten as `let...else` + v_some + } else { + if panic!() {}; + }; // An expression of a match can cause divergence: let v = if let Some(v_some) = g() { @@ -103,7 +159,7 @@ fn fire() { } else { match panic!() { _ => {}, - } + }; }; // Top level else if @@ -342,6 +398,43 @@ fn not_fire() { } else { return; }; + + // A break that skips the divergent statement will cause the expression to be non-divergent. + let _x = if let Some(x) = Some(0) { + x + } else { + 'foo: loop { + break 'foo 0; + panic!(); + } + }; + + // Even in inner loops. + let _x = if let Some(x) = Some(0) { + x + } else { + 'foo: { + loop { + break 'foo 0; + } + panic!(); + } + }; + + // But a break that can't ever be reached still affects divergence checking. + let _x = if let Some(x) = g() { + x + } else { + 'foo: { + 'bar: loop { + loop { + break 'bar (); + } + break 'foo (); + } + panic!(); + }; + }; } struct S<T> { diff --git a/tests/ui/manual_let_else.stderr b/tests/ui/manual_let_else.stderr index 2b6504a1827..3beaf766efb 100644 --- a/tests/ui/manual_let_else.stderr +++ b/tests/ui/manual_let_else.stderr @@ -1,5 +1,5 @@ error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:25:5 + --> $DIR/manual_let_else.rs:27:5 | LL | let v = if let Some(v_some) = g() { v_some } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { return };` @@ -8,7 +8,7 @@ LL | let v = if let Some(v_some) = g() { v_some } else { return }; = help: to override `-D warnings` add `#[allow(clippy::manual_let_else)]` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:28:5 + --> $DIR/manual_let_else.rs:30:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -26,7 +26,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:35:5 + --> $DIR/manual_let_else.rs:37:5 | LL | / let v = if let Some(v) = g() { LL | | @@ -47,25 +47,25 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:47:9 + --> $DIR/manual_let_else.rs:49:9 | LL | let v = if let Some(v_some) = g() { v_some } else { continue }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { continue };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:49:9 + --> $DIR/manual_let_else.rs:51:9 | LL | let v = if let Some(v_some) = g() { v_some } else { break }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { break };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:54:5 + --> $DIR/manual_let_else.rs:56:5 | LL | let v = if let Some(v_some) = g() { v_some } else { panic!() }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { panic!() };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:58:5 + --> $DIR/manual_let_else.rs:60:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -83,7 +83,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:66:5 + --> $DIR/manual_let_else.rs:68:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -101,7 +101,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:74:5 + --> $DIR/manual_let_else.rs:76:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -127,6 +127,26 @@ LL | / let v = if let Some(v_some) = g() { LL | | LL | | v_some LL | | } else { +LL | | panic!(); +LL | | () +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { +LL + panic!(); +LL + () +LL + }; + | + +error: this could be rewritten as `let...else` + --> $DIR/manual_let_else.rs:94:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { ... | LL | | } LL | | }; @@ -135,21 +155,42 @@ LL | | }; help: consider writing | LL ~ let Some(v) = g() else { -LL + match () { -LL + _ if panic!() => {}, -LL + _ => panic!(), +LL + panic!(); +LL + if true { +LL + match 0 { +LL + 0 => (), +LL + _ => (), +LL + } +LL + } else { +LL + panic!() LL + } LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:96:5 + --> $DIR/manual_let_else.rs:110:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { +... | +LL | | } +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { +LL + loop { +LL + panic!(); +LL + break (); +LL + } +LL + }; | -LL | let v = if let Some(v_some) = g() { v_some } else { if panic!() {} }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some(v) = g() else { if panic!() {} };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:100:5 + --> $DIR/manual_let_else.rs:121:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -163,14 +204,81 @@ LL | | }; help: consider writing | LL ~ let Some(v) = g() else { +LL + 'a: loop { +LL + panic!(); +LL + loop { +LL + match 0 { +LL + 0 if (return break 'a ()) => {}, +LL + _ => {}, +LL + } +LL + } +LL + } +LL + }; + | + +error: this could be rewritten as `let...else` + --> $DIR/manual_let_else.rs:137:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { +... | +LL | | }; +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { +LL + match 0 { +LL + 0 if true => panic!(), +LL + _ => panic!(), +LL + }; +LL + }; + | + +error: this could be rewritten as `let...else` + --> $DIR/manual_let_else.rs:148:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { +LL | | if panic!() {}; +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { +LL + if panic!() {}; +LL + }; + | + +error: this could be rewritten as `let...else` + --> $DIR/manual_let_else.rs:156:5 + | +LL | / let v = if let Some(v_some) = g() { +LL | | +LL | | v_some +LL | | } else { +... | +LL | | }; +LL | | }; + | |______^ + | +help: consider writing + | +LL ~ let Some(v) = g() else { LL + match panic!() { LL + _ => {}, -LL + } +LL + }; LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:110:5 + --> $DIR/manual_let_else.rs:166:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -191,7 +299,7 @@ LL + } }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:120:5 + --> $DIR/manual_let_else.rs:176:5 | LL | / let v = if let Some(v_some) = g() { LL | | @@ -220,7 +328,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:138:5 + --> $DIR/manual_let_else.rs:194:5 | LL | / let (v, w) = if let Some(v_some) = g().map(|v| (v, 42)) { LL | | @@ -238,7 +346,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:146:5 + --> $DIR/manual_let_else.rs:202:5 | LL | / let (w, S { v }) = if let (Some(v_some), w_some) = (g().map(|_| S { v: 0 }), 0) { LL | | @@ -256,7 +364,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:156:13 + --> $DIR/manual_let_else.rs:212:13 | LL | let $n = if let Some(v) = $e { v } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Some($n) = g() else { return };` @@ -267,19 +375,19 @@ LL | create_binding_if_some!(w, g()); = note: this error originates in the macro `create_binding_if_some` (in Nightly builds, run with -Z macro-backtrace for more info) error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:165:5 + --> $DIR/manual_let_else.rs:221:5 | LL | let v = if let Variant::A(a, 0) = e() { a } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Variant::A(v, 0) = e() else { return };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:169:5 + --> $DIR/manual_let_else.rs:225:5 | LL | let mut v = if let Variant::B(b) = e() { b } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Variant::B(mut v) = e() else { return };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:174:5 + --> $DIR/manual_let_else.rs:230:5 | LL | / let v = if let Ok(Some(Variant::B(b))) | Err(Some(Variant::A(b, _))) = nested { LL | | @@ -297,19 +405,19 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:181:5 + --> $DIR/manual_let_else.rs:237:5 | LL | let v = if let Variant::A(.., a) = e() { a } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let Variant::A(.., v) = e() else { return };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:185:5 + --> $DIR/manual_let_else.rs:241:5 | LL | let w = if let (Some(v), ()) = (g(), ()) { v } else { return }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider writing: `let (Some(w), ()) = (g(), ()) else { return };` error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:189:5 + --> $DIR/manual_let_else.rs:245:5 | LL | / let w = if let Some(S { v: x }) = Some(S { v: 0 }) { LL | | @@ -327,7 +435,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:197:5 + --> $DIR/manual_let_else.rs:253:5 | LL | / let v = if let Some(S { v: x }) = Some(S { v: 0 }) { LL | | @@ -345,7 +453,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:205:5 + --> $DIR/manual_let_else.rs:261:5 | LL | / let (x, S { v }, w) = if let Some(U { v, w, x }) = None::<U<S<()>>> { LL | | @@ -363,7 +471,7 @@ LL + }; | error: this could be rewritten as `let...else` - --> $DIR/manual_let_else.rs:322:5 + --> $DIR/manual_let_else.rs:378:5 | LL | / let _ = match ff { LL | | @@ -372,5 +480,5 @@ LL | | _ => macro_call!(), LL | | }; | |______^ help: consider writing: `let Some(_) = ff else { macro_call!() };` -error: aborting due to 26 previous errors +error: aborting due to 30 previous errors diff --git a/tests/ui/manual_memcpy/without_loop_counters.rs b/tests/ui/manual_memcpy/without_loop_counters.rs index a224001a3df..8146091a2bb 100644 --- a/tests/ui/manual_memcpy/without_loop_counters.rs +++ b/tests/ui/manual_memcpy/without_loop_counters.rs @@ -138,6 +138,26 @@ pub fn manual_copy(src: &[i32], dst: &mut [i32], dst2: &mut [i32]) { for i in 0..dst.len() { dst[i] = src[i]; } + + // Range is equal to array length + let src = [0, 1, 2, 3, 4]; + let mut dst = [0; 4]; + for i in 0..4 { + //~^ ERROR: it looks like you're manually copying between slices + dst[i] = src[i]; + } + + let mut dst = [0; 6]; + for i in 0..5 { + //~^ ERROR: it looks like you're manually copying between slices + dst[i] = src[i]; + } + + let mut dst = [0; 5]; + for i in 0..5 { + //~^ ERROR: it looks like you're manually copying between slices + dst[i] = src[i]; + } } #[warn(clippy::needless_range_loop, clippy::manual_memcpy)] diff --git a/tests/ui/manual_memcpy/without_loop_counters.stderr b/tests/ui/manual_memcpy/without_loop_counters.stderr index b9dbda6ede7..4b5cd274da7 100644 --- a/tests/ui/manual_memcpy/without_loop_counters.stderr +++ b/tests/ui/manual_memcpy/without_loop_counters.stderr @@ -106,7 +106,7 @@ LL | / for i in 0..5 { LL | | LL | | dst[i - 0] = src[i]; LL | | } - | |_____^ help: try replacing the loop by: `dst[..5].copy_from_slice(&src[..5]);` + | |_____^ help: try replacing the loop by: `dst[..5].copy_from_slice(&src);` error: it looks like you're manually copying between slices --> $DIR/without_loop_counters.rs:121:5 @@ -120,11 +120,38 @@ LL | | } error: it looks like you're manually copying between slices --> $DIR/without_loop_counters.rs:145:5 | +LL | / for i in 0..4 { +LL | | +LL | | dst[i] = src[i]; +LL | | } + | |_____^ help: try replacing the loop by: `dst.copy_from_slice(&src[..4]);` + +error: it looks like you're manually copying between slices + --> $DIR/without_loop_counters.rs:151:5 + | +LL | / for i in 0..5 { +LL | | +LL | | dst[i] = src[i]; +LL | | } + | |_____^ help: try replacing the loop by: `dst[..5].copy_from_slice(&src);` + +error: it looks like you're manually copying between slices + --> $DIR/without_loop_counters.rs:157:5 + | +LL | / for i in 0..5 { +LL | | +LL | | dst[i] = src[i]; +LL | | } + | |_____^ help: try replacing the loop by: `dst.copy_from_slice(&src);` + +error: it looks like you're manually copying between slices + --> $DIR/without_loop_counters.rs:165:5 + | LL | / for i in 0..src.len() { LL | | LL | | dst[i] = src[i].clone(); LL | | } | |_____^ help: try replacing the loop by: `dst[..src.len()].clone_from_slice(&src[..]);` -error: aborting due to 13 previous errors +error: aborting due to 16 previous errors diff --git a/tests/ui/map_identity.fixed b/tests/ui/map_identity.fixed index 62b0ba01860..53ebfb40ba0 100644 --- a/tests/ui/map_identity.fixed +++ b/tests/ui/map_identity.fixed @@ -24,28 +24,40 @@ fn main() { fn issue7189() { // should lint - let x = [(1, 2), (3, 4)]; - let _ = x.iter(); - let _ = x.iter(); - let _ = x.iter(); + let x = [(1, 2), (3, 4)].iter().copied(); + let _ = x.clone(); + let _ = x.clone(); + let _ = x.clone(); - let y = [(1, 2, (3, (4,))), (5, 6, (7, (8,)))]; - let _ = y.iter(); + let y = [(1, 2, (3, (4,))), (5, 6, (7, (8,)))].iter().copied(); + let _ = y.clone(); // should not lint - let _ = x.iter().map(|(x, y)| (x, y, y)); - let _ = x.iter().map(|(x, _y)| (x,)); - let _ = x.iter().map(|(x, _)| (x,)); - let _ = x.iter().map(|(x, ..)| (x,)); - let _ = y.iter().map(|(x, y, (z, _))| (x, y, (z, z))); + let _ = x.clone().map(|(x, y)| (x, y, y)); + let _ = x.clone().map(|(x, _y)| (x,)); + let _ = x.clone().map(|(x, _)| (x,)); + let _ = x.clone().map(|(x, ..)| (x,)); + let _ = y.clone().map(|(x, y, (z, _))| (x, y, (z, z))); let _ = y - .iter() - .map(|(x, y, (z, _)): &(i32, i32, (i32, (i32,)))| (x, y, (z, z))); + .clone() + .map(|(x, y, (z, _)): (i32, i32, (i32, (i32,)))| (x, y, (z, z))); let _ = y - .iter() - .map(|(x, y, (z, (w,))): &(i32, i32, (i32, (i32,)))| (x, y, (z, (w,)))); + .clone() + .map(|(x, y, (z, (w,))): (i32, i32, (i32, (i32,)))| (x, y, (z, (w,)))); } fn not_identity(x: &u16) -> u16 { *x } + +fn issue11764() { + let x = [(1, 2), (3, 4)]; + // don't lint: this is an `Iterator<Item = &(i32, i32)>` + // match ergonomics makes the binding patterns into references + // so that its type changes to `Iterator<Item = (&i32, &i32)>` + let _ = x.iter().map(|(x, y)| (x, y)); + let _ = x.iter().map(|x| (x.0,)).map(|(x,)| x); + + // no match ergonomics for `(i32, i32)` + let _ = x.iter().copied(); +} diff --git a/tests/ui/map_identity.rs b/tests/ui/map_identity.rs index b7f4c99f273..c646c056859 100644 --- a/tests/ui/map_identity.rs +++ b/tests/ui/map_identity.rs @@ -26,30 +26,42 @@ fn main() { fn issue7189() { // should lint - let x = [(1, 2), (3, 4)]; - let _ = x.iter().map(|(x, y)| (x, y)); - let _ = x.iter().map(|(x, y)| { + let x = [(1, 2), (3, 4)].iter().copied(); + let _ = x.clone().map(|(x, y)| (x, y)); + let _ = x.clone().map(|(x, y)| { return (x, y); }); - let _ = x.iter().map(|(x, y)| return (x, y)); + let _ = x.clone().map(|(x, y)| return (x, y)); - let y = [(1, 2, (3, (4,))), (5, 6, (7, (8,)))]; - let _ = y.iter().map(|(x, y, (z, (w,)))| (x, y, (z, (w,)))); + let y = [(1, 2, (3, (4,))), (5, 6, (7, (8,)))].iter().copied(); + let _ = y.clone().map(|(x, y, (z, (w,)))| (x, y, (z, (w,)))); // should not lint - let _ = x.iter().map(|(x, y)| (x, y, y)); - let _ = x.iter().map(|(x, _y)| (x,)); - let _ = x.iter().map(|(x, _)| (x,)); - let _ = x.iter().map(|(x, ..)| (x,)); - let _ = y.iter().map(|(x, y, (z, _))| (x, y, (z, z))); + let _ = x.clone().map(|(x, y)| (x, y, y)); + let _ = x.clone().map(|(x, _y)| (x,)); + let _ = x.clone().map(|(x, _)| (x,)); + let _ = x.clone().map(|(x, ..)| (x,)); + let _ = y.clone().map(|(x, y, (z, _))| (x, y, (z, z))); let _ = y - .iter() - .map(|(x, y, (z, _)): &(i32, i32, (i32, (i32,)))| (x, y, (z, z))); + .clone() + .map(|(x, y, (z, _)): (i32, i32, (i32, (i32,)))| (x, y, (z, z))); let _ = y - .iter() - .map(|(x, y, (z, (w,))): &(i32, i32, (i32, (i32,)))| (x, y, (z, (w,)))); + .clone() + .map(|(x, y, (z, (w,))): (i32, i32, (i32, (i32,)))| (x, y, (z, (w,)))); } fn not_identity(x: &u16) -> u16 { *x } + +fn issue11764() { + let x = [(1, 2), (3, 4)]; + // don't lint: this is an `Iterator<Item = &(i32, i32)>` + // match ergonomics makes the binding patterns into references + // so that its type changes to `Iterator<Item = (&i32, &i32)>` + let _ = x.iter().map(|(x, y)| (x, y)); + let _ = x.iter().map(|x| (x.0,)).map(|(x,)| x); + + // no match ergonomics for `(i32, i32)` + let _ = x.iter().copied().map(|(x, y)| (x, y)); +} diff --git a/tests/ui/map_identity.stderr b/tests/ui/map_identity.stderr index 4ca24b0b04c..ea077d66d64 100644 --- a/tests/ui/map_identity.stderr +++ b/tests/ui/map_identity.stderr @@ -41,31 +41,37 @@ LL | let _: Result<u32, u32> = Ok(1).map_err(|a| a); | ^^^^^^^^^^^^^^^ help: remove the call to `map_err` error: unnecessary map of the identity function - --> $DIR/map_identity.rs:30:21 + --> $DIR/map_identity.rs:30:22 | -LL | let _ = x.iter().map(|(x, y)| (x, y)); - | ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` +LL | let _ = x.clone().map(|(x, y)| (x, y)); + | ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` error: unnecessary map of the identity function - --> $DIR/map_identity.rs:31:21 + --> $DIR/map_identity.rs:31:22 | -LL | let _ = x.iter().map(|(x, y)| { - | _____________________^ +LL | let _ = x.clone().map(|(x, y)| { + | ______________________^ LL | | return (x, y); LL | | }); | |______^ help: remove the call to `map` error: unnecessary map of the identity function - --> $DIR/map_identity.rs:34:21 + --> $DIR/map_identity.rs:34:22 | -LL | let _ = x.iter().map(|(x, y)| return (x, y)); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` +LL | let _ = x.clone().map(|(x, y)| return (x, y)); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` error: unnecessary map of the identity function - --> $DIR/map_identity.rs:37:21 + --> $DIR/map_identity.rs:37:22 | -LL | let _ = y.iter().map(|(x, y, (z, (w,)))| (x, y, (z, (w,)))); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` +LL | let _ = y.clone().map(|(x, y, (z, (w,)))| (x, y, (z, (w,)))); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` -error: aborting due to 10 previous errors +error: unnecessary map of the identity function + --> $DIR/map_identity.rs:66:30 + | +LL | let _ = x.iter().copied().map(|(x, y)| (x, y)); + | ^^^^^^^^^^^^^^^^^^^^^ help: remove the call to `map` + +error: aborting due to 11 previous errors diff --git a/tests/ui/needless_borrow.fixed b/tests/ui/needless_borrow.fixed index c2c5f765abf..ff1e2dc8875 100644 --- a/tests/ui/needless_borrow.fixed +++ b/tests/ui/needless_borrow.fixed @@ -190,27 +190,48 @@ fn issue9383() { // Should not lint because unions need explicit deref when accessing field use std::mem::ManuallyDrop; - union Coral { - crab: ManuallyDrop<Vec<i32>>, + #[derive(Clone, Copy)] + struct Wrap<T>(T); + impl<T> core::ops::Deref for Wrap<T> { + type Target = T; + fn deref(&self) -> &T { + &self.0 + } + } + impl<T> core::ops::DerefMut for Wrap<T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.0 + } } - union Ocean { - coral: ManuallyDrop<Coral>, + union U<T: Copy> { + u: T, } - let mut ocean = Ocean { - coral: ManuallyDrop::new(Coral { - crab: ManuallyDrop::new(vec![1, 2, 3]), - }), - }; + #[derive(Clone, Copy)] + struct Foo { + x: u32, + } unsafe { - ManuallyDrop::drop(&mut (&mut ocean.coral).crab); - - (*ocean.coral).crab = ManuallyDrop::new(vec![4, 5, 6]); - ManuallyDrop::drop(&mut (*ocean.coral).crab); - - ManuallyDrop::drop(&mut ocean.coral); + let mut x = U { + u: ManuallyDrop::new(Foo { x: 0 }), + }; + let _ = &mut (&mut x.u).x; + let _ = &mut { x.u }.x; + let _ = &mut ({ &mut x.u }).x; + + let mut x = U { + u: Wrap(ManuallyDrop::new(Foo { x: 0 })), + }; + let _ = &mut (&mut x.u).x; + let _ = &mut { x.u }.x; + let _ = &mut ({ &mut x.u }).x; + + let mut x = U { u: Wrap(Foo { x: 0 }) }; + let _ = &mut x.u.x; + let _ = &mut { x.u }.x; + let _ = &mut ({ &mut x.u }).x; } } diff --git a/tests/ui/needless_borrow.rs b/tests/ui/needless_borrow.rs index 0cd6e41b8a4..597021539ac 100644 --- a/tests/ui/needless_borrow.rs +++ b/tests/ui/needless_borrow.rs @@ -190,27 +190,48 @@ fn issue9383() { // Should not lint because unions need explicit deref when accessing field use std::mem::ManuallyDrop; - union Coral { - crab: ManuallyDrop<Vec<i32>>, + #[derive(Clone, Copy)] + struct Wrap<T>(T); + impl<T> core::ops::Deref for Wrap<T> { + type Target = T; + fn deref(&self) -> &T { + &self.0 + } + } + impl<T> core::ops::DerefMut for Wrap<T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.0 + } } - union Ocean { - coral: ManuallyDrop<Coral>, + union U<T: Copy> { + u: T, } - let mut ocean = Ocean { - coral: ManuallyDrop::new(Coral { - crab: ManuallyDrop::new(vec![1, 2, 3]), - }), - }; + #[derive(Clone, Copy)] + struct Foo { + x: u32, + } unsafe { - ManuallyDrop::drop(&mut (&mut ocean.coral).crab); - - (*ocean.coral).crab = ManuallyDrop::new(vec![4, 5, 6]); - ManuallyDrop::drop(&mut (*ocean.coral).crab); - - ManuallyDrop::drop(&mut ocean.coral); + let mut x = U { + u: ManuallyDrop::new(Foo { x: 0 }), + }; + let _ = &mut (&mut x.u).x; + let _ = &mut (&mut { x.u }).x; + let _ = &mut ({ &mut x.u }).x; + + let mut x = U { + u: Wrap(ManuallyDrop::new(Foo { x: 0 })), + }; + let _ = &mut (&mut x.u).x; + let _ = &mut (&mut { x.u }).x; + let _ = &mut ({ &mut x.u }).x; + + let mut x = U { u: Wrap(Foo { x: 0 }) }; + let _ = &mut (&mut x.u).x; + let _ = &mut (&mut { x.u }).x; + let _ = &mut ({ &mut x.u }).x; } } diff --git a/tests/ui/needless_borrow.stderr b/tests/ui/needless_borrow.stderr index e91b78b0a15..44552ee6abe 100644 --- a/tests/ui/needless_borrow.stderr +++ b/tests/ui/needless_borrow.stderr @@ -133,5 +133,29 @@ error: this expression borrows a value the compiler would automatically borrow LL | (&mut self.f)() | ^^^^^^^^^^^^^ help: change this to: `(self.f)` -error: aborting due to 22 previous errors +error: this expression borrows a value the compiler would automatically borrow + --> $DIR/needless_borrow.rs:221:22 + | +LL | let _ = &mut (&mut { x.u }).x; + | ^^^^^^^^^^^^^^ help: change this to: `{ x.u }` + +error: this expression borrows a value the compiler would automatically borrow + --> $DIR/needless_borrow.rs:228:22 + | +LL | let _ = &mut (&mut { x.u }).x; + | ^^^^^^^^^^^^^^ help: change this to: `{ x.u }` + +error: this expression borrows a value the compiler would automatically borrow + --> $DIR/needless_borrow.rs:232:22 + | +LL | let _ = &mut (&mut x.u).x; + | ^^^^^^^^^^ help: change this to: `x.u` + +error: this expression borrows a value the compiler would automatically borrow + --> $DIR/needless_borrow.rs:233:22 + | +LL | let _ = &mut (&mut { x.u }).x; + | ^^^^^^^^^^^^^^ help: change this to: `{ x.u }` + +error: aborting due to 26 previous errors diff --git a/tests/ui/unnecessary_fallible_conversions.stderr b/tests/ui/unnecessary_fallible_conversions.stderr index b918fdf774b..26b152515ac 100644 --- a/tests/ui/unnecessary_fallible_conversions.stderr +++ b/tests/ui/unnecessary_fallible_conversions.stderr @@ -4,6 +4,7 @@ error: use of a fallible conversion when an infallible one could be used LL | let _: i64 = 0i32.try_into().unwrap(); | ^^^^^^^^^^^^^^^^^^^ help: use: `into()` | + = note: converting `i32` to `i64` cannot fail = note: `-D clippy::unnecessary-fallible-conversions` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::unnecessary_fallible_conversions)]` @@ -12,6 +13,8 @@ error: use of a fallible conversion when an infallible one could be used | LL | let _: i64 = 0i32.try_into().expect("can't happen"); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `into()` + | + = note: converting `i32` to `i64` cannot fail error: aborting due to 2 previous errors diff --git a/tests/ui/unnecessary_fallible_conversions_unfixable.stderr b/tests/ui/unnecessary_fallible_conversions_unfixable.stderr index 286decf8f35..033de0e9250 100644 --- a/tests/ui/unnecessary_fallible_conversions_unfixable.stderr +++ b/tests/ui/unnecessary_fallible_conversions_unfixable.stderr @@ -4,6 +4,7 @@ error: use of a fallible conversion when an infallible one could be used LL | let _: Result<Foo, _> = 0i64.try_into(); | ^^^^^^^^ help: use: `into` | + = note: converting `i64` to `Foo` cannot fail = note: `-D clippy::unnecessary-fallible-conversions` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::unnecessary_fallible_conversions)]` @@ -12,30 +13,40 @@ error: use of a fallible conversion when an infallible one could be used | LL | let _: Result<Foo, _> = i64::try_into(0i64); | ^^^^^^^^^^^^^ help: use: `Into::into` + | + = note: converting `i64` to `Foo` cannot fail error: use of a fallible conversion when an infallible one could be used --> $DIR/unnecessary_fallible_conversions_unfixable.rs:31:29 | LL | let _: Result<Foo, _> = Foo::try_from(0i64); | ^^^^^^^^^^^^^ help: use: `From::from` + | + = note: converting `i64` to `Foo` cannot fail error: use of a fallible conversion when an infallible one could be used --> $DIR/unnecessary_fallible_conversions_unfixable.rs:34:34 | LL | let _: Result<i64, _> = 0i32.try_into(); | ^^^^^^^^ help: use: `into` + | + = note: converting `i32` to `i64` cannot fail error: use of a fallible conversion when an infallible one could be used --> $DIR/unnecessary_fallible_conversions_unfixable.rs:36:29 | LL | let _: Result<i64, _> = i32::try_into(0i32); | ^^^^^^^^^^^^^ help: use: `Into::into` + | + = note: converting `i32` to `i64` cannot fail error: use of a fallible conversion when an infallible one could be used --> $DIR/unnecessary_fallible_conversions_unfixable.rs:38:29 | LL | let _: Result<i64, _> = <_>::try_from(0i32); | ^^^^^^^^^^^^^ help: use: `From::from` + | + = note: converting `i32` to `i64` cannot fail error: aborting due to 6 previous errors diff --git a/tests/ui/vec_box_sized.fixed b/tests/ui/vec_box_sized.fixed deleted file mode 100644 index 4363d2224af..00000000000 --- a/tests/ui/vec_box_sized.fixed +++ /dev/null @@ -1,57 +0,0 @@ -#![allow(dead_code)] - -struct SizedStruct(i32); -struct UnsizedStruct([i32]); -struct BigStruct([i32; 10000]); - -/// The following should trigger the lint -mod should_trigger { - use super::SizedStruct; - const C: Vec<i32> = Vec::new(); - static S: Vec<i32> = Vec::new(); - - struct StructWithVecBox { - sized_type: Vec<SizedStruct>, - } - - struct A(Vec<SizedStruct>); - struct B(Vec<Vec<u32>>); -} - -/// The following should not trigger the lint -mod should_not_trigger { - use super::{BigStruct, UnsizedStruct}; - - struct C(Vec<Box<UnsizedStruct>>); - struct D(Vec<Box<BigStruct>>); - - struct StructWithVecBoxButItsUnsized { - unsized_type: Vec<Box<UnsizedStruct>>, - } - - struct TraitVec<T: ?Sized> { - // Regression test for #3720. This was causing an ICE. - inner: Vec<Box<T>>, - } -} - -mod inner_mod { - mod inner { - pub struct S; - } - - mod inner2 { - use super::inner::S; - - pub fn f() -> Vec<S> { - vec![] - } - } -} - -// https://github.com/rust-lang/rust-clippy/issues/11417 -fn in_closure() { - let _ = |_: Vec<Box<dyn ToString>>| {}; -} - -fn main() {} diff --git a/tests/ui/vec_box_sized.rs b/tests/ui/vec_box_sized.rs index f4e27fe4bd5..49eaf8e062a 100644 --- a/tests/ui/vec_box_sized.rs +++ b/tests/ui/vec_box_sized.rs @@ -1,12 +1,28 @@ +//@no-rustfix + #![allow(dead_code)] +#![feature(allocator_api)] + +use std::alloc::{AllocError, Allocator, Layout}; +use std::ptr::NonNull; struct SizedStruct(i32); struct UnsizedStruct([i32]); struct BigStruct([i32; 10000]); +struct DummyAllocator; +unsafe impl Allocator for DummyAllocator { + fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> { + todo!() + } + unsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout) { + todo!() + } +} + /// The following should trigger the lint mod should_trigger { - use super::SizedStruct; + use super::{DummyAllocator, SizedStruct}; const C: Vec<Box<i32>> = Vec::new(); static S: Vec<Box<i32>> = Vec::new(); @@ -16,11 +32,21 @@ mod should_trigger { struct A(Vec<Box<SizedStruct>>); struct B(Vec<Vec<Box<(u32)>>>); + + fn allocator_global_defined_vec() -> Vec<Box<i32>, std::alloc::Global> { + Vec::new() + } + fn allocator_global_defined_box() -> Vec<Box<i32, std::alloc::Global>> { + Vec::new() + } + fn allocator_match() -> Vec<Box<i32, DummyAllocator>, DummyAllocator> { + Vec::new_in(DummyAllocator) + } } /// The following should not trigger the lint mod should_not_trigger { - use super::{BigStruct, UnsizedStruct}; + use super::{BigStruct, DummyAllocator, UnsizedStruct}; struct C(Vec<Box<UnsizedStruct>>); struct D(Vec<Box<BigStruct>>); @@ -33,6 +59,13 @@ mod should_not_trigger { // Regression test for #3720. This was causing an ICE. inner: Vec<Box<T>>, } + + fn allocator_mismatch() -> Vec<Box<i32, DummyAllocator>> { + Vec::new() + } + fn allocator_mismatch_2() -> Vec<Box<i32>, DummyAllocator> { + Vec::new_in(DummyAllocator) + } } mod inner_mod { diff --git a/tests/ui/vec_box_sized.stderr b/tests/ui/vec_box_sized.stderr index 9118f284bb9..d6479271fa6 100644 --- a/tests/ui/vec_box_sized.stderr +++ b/tests/ui/vec_box_sized.stderr @@ -1,5 +1,5 @@ error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:10:14 + --> $DIR/vec_box_sized.rs:26:14 | LL | const C: Vec<Box<i32>> = Vec::new(); | ^^^^^^^^^^^^^ help: try: `Vec<i32>` @@ -8,34 +8,52 @@ LL | const C: Vec<Box<i32>> = Vec::new(); = help: to override `-D warnings` add `#[allow(clippy::vec_box)]` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:11:15 + --> $DIR/vec_box_sized.rs:27:15 | LL | static S: Vec<Box<i32>> = Vec::new(); | ^^^^^^^^^^^^^ help: try: `Vec<i32>` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:14:21 + --> $DIR/vec_box_sized.rs:30:21 | LL | sized_type: Vec<Box<SizedStruct>>, | ^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<SizedStruct>` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:17:14 + --> $DIR/vec_box_sized.rs:33:14 | LL | struct A(Vec<Box<SizedStruct>>); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<SizedStruct>` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:18:18 + --> $DIR/vec_box_sized.rs:34:18 | LL | struct B(Vec<Vec<Box<(u32)>>>); | ^^^^^^^^^^^^^^^ help: try: `Vec<u32>` error: `Vec<T>` is already on the heap, the boxing is unnecessary - --> $DIR/vec_box_sized.rs:46:23 + --> $DIR/vec_box_sized.rs:36:42 + | +LL | fn allocator_global_defined_vec() -> Vec<Box<i32>, std::alloc::Global> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<i32>` + +error: `Vec<T>` is already on the heap, the boxing is unnecessary + --> $DIR/vec_box_sized.rs:39:42 + | +LL | fn allocator_global_defined_box() -> Vec<Box<i32, std::alloc::Global>> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<i32>` + +error: `Vec<T>` is already on the heap, the boxing is unnecessary + --> $DIR/vec_box_sized.rs:42:29 + | +LL | fn allocator_match() -> Vec<Box<i32, DummyAllocator>, DummyAllocator> { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Vec<i32>` + +error: `Vec<T>` is already on the heap, the boxing is unnecessary + --> $DIR/vec_box_sized.rs:79:23 | LL | pub fn f() -> Vec<Box<S>> { | ^^^^^^^^^^^ help: try: `Vec<S>` -error: aborting due to 6 previous errors +error: aborting due to 9 previous errors |