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Extend unused_must_use to cover block exprs

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This commit is contained in:
许杰友 Jieyou Xu (Joe) 2023-06-11 23:44:28 +08:00
parent edb3266b91
commit a35c78fa70
3 changed files with 28 additions and 26 deletions
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3
tests/ui/transmute_ptr_to_ref.fixed
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@ -2,6 +2,7 @@
#![warn(clippy::transmute_ptr_to_ref)] #![warn(clippy::transmute_ptr_to_ref)]
#![allow(clippy::match_single_binding)] #![allow(clippy::match_single_binding)]
#![allow(unused_must_use)]
unsafe fn _ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) { unsafe fn _ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) {
let _: &T = &*p; let _: &T = &*p;
@ -38,7 +39,7 @@ fn _issue1231() {
type Bar<'a> = &'a u8; type Bar<'a> = &'a u8;
let raw = 42 as *const i32; let raw = 42 as *const i32;
unsafe { &*(raw as *const u8) }; let _ = unsafe { &*(raw as *const u8) };
} }
unsafe fn _issue8924<'a, 'b, 'c>(x: *const &'a u32, y: *const &'b u32) -> &'c &'b u32 { unsafe fn _issue8924<'a, 'b, 'c>(x: *const &'a u32, y: *const &'b u32) -> &'c &'b u32 {

3
tests/ui/transmute_ptr_to_ref.rs
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@ -2,6 +2,7 @@
#![warn(clippy::transmute_ptr_to_ref)] #![warn(clippy::transmute_ptr_to_ref)]
#![allow(clippy::match_single_binding)] #![allow(clippy::match_single_binding)]
#![allow(unused_must_use)]
unsafe fn _ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) { unsafe fn _ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) {
let _: &T = std::mem::transmute(p); let _: &T = std::mem::transmute(p);
@ -38,7 +39,7 @@ fn _issue1231() {
type Bar<'a> = &'a u8; type Bar<'a> = &'a u8;
let raw = 42 as *const i32; let raw = 42 as *const i32;
unsafe { std::mem::transmute::<_, Bar>(raw) }; let _ = unsafe { std::mem::transmute::<_, Bar>(raw) };
} }
unsafe fn _issue8924<'a, 'b, 'c>(x: *const &'a u32, y: *const &'b u32) -> &'c &'b u32 { unsafe fn _issue8924<'a, 'b, 'c>(x: *const &'a u32, y: *const &'b u32) -> &'c &'b u32 {

48
tests/ui/transmute_ptr_to_ref.stderr
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@ -1,5 +1,5 @@
error: transmute from a pointer type (`*const T`) to a reference type (`&T`) error: transmute from a pointer type (`*const T`) to a reference type (`&T`)
--> $DIR/transmute_ptr_to_ref.rs:7:17 --> $DIR/transmute_ptr_to_ref.rs:8:17
| |
LL | let _: &T = std::mem::transmute(p); LL | let _: &T = std::mem::transmute(p);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*p` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*p`
@ -7,127 +7,127 @@ LL | let _: &T = std::mem::transmute(p);
= note: `-D clippy::transmute-ptr-to-ref` implied by `-D warnings` = note: `-D clippy::transmute-ptr-to-ref` implied by `-D warnings`
error: transmute from a pointer type (`*mut T`) to a reference type (`&mut T`) error: transmute from a pointer type (`*mut T`) to a reference type (`&mut T`)
--> $DIR/transmute_ptr_to_ref.rs:10:21 --> $DIR/transmute_ptr_to_ref.rs:11:21
| |
LL | let _: &mut T = std::mem::transmute(m); LL | let _: &mut T = std::mem::transmute(m);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *m` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *m`
error: transmute from a pointer type (`*mut T`) to a reference type (`&T`) error: transmute from a pointer type (`*mut T`) to a reference type (`&T`)
--> $DIR/transmute_ptr_to_ref.rs:13:17 --> $DIR/transmute_ptr_to_ref.rs:14:17
| |
LL | let _: &T = std::mem::transmute(m); LL | let _: &T = std::mem::transmute(m);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*m` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*m`
error: transmute from a pointer type (`*mut T`) to a reference type (`&mut T`) error: transmute from a pointer type (`*mut T`) to a reference type (`&mut T`)
--> $DIR/transmute_ptr_to_ref.rs:16:21 --> $DIR/transmute_ptr_to_ref.rs:17:21
| |
LL | let _: &mut T = std::mem::transmute(p as *mut T); LL | let _: &mut T = std::mem::transmute(p as *mut T);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(p as *mut T)` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(p as *mut T)`
error: transmute from a pointer type (`*const U`) to a reference type (`&T`) error: transmute from a pointer type (`*const U`) to a reference type (`&T`)
--> $DIR/transmute_ptr_to_ref.rs:19:17 --> $DIR/transmute_ptr_to_ref.rs:20:17
| |
LL | let _: &T = std::mem::transmute(o); LL | let _: &T = std::mem::transmute(o);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(o as *const T)` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(o as *const T)`
error: transmute from a pointer type (`*mut U`) to a reference type (`&mut T`) error: transmute from a pointer type (`*mut U`) to a reference type (`&mut T`)
--> $DIR/transmute_ptr_to_ref.rs:22:21 --> $DIR/transmute_ptr_to_ref.rs:23:21
| |
LL | let _: &mut T = std::mem::transmute(om); LL | let _: &mut T = std::mem::transmute(om);
| ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(om as *mut T)` | ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(om as *mut T)`
error: transmute from a pointer type (`*mut U`) to a reference type (`&T`) error: transmute from a pointer type (`*mut U`) to a reference type (`&T`)
--> $DIR/transmute_ptr_to_ref.rs:25:17 --> $DIR/transmute_ptr_to_ref.rs:26:17
| |
LL | let _: &T = std::mem::transmute(om); LL | let _: &T = std::mem::transmute(om);
| ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(om as *const T)` | ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(om as *const T)`
error: transmute from a pointer type (`*const i32`) to a reference type (`&_issue1231::Foo<'_, u8>`) error: transmute from a pointer type (`*const i32`) to a reference type (`&_issue1231::Foo<'_, u8>`)
--> $DIR/transmute_ptr_to_ref.rs:35:32 --> $DIR/transmute_ptr_to_ref.rs:36:32
| |
LL | let _: &Foo<u8> = unsafe { std::mem::transmute::<_, &Foo<_>>(raw) }; LL | let _: &Foo<u8> = unsafe { std::mem::transmute::<_, &Foo<_>>(raw) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*raw.cast::<Foo<_>>()` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*raw.cast::<Foo<_>>()`
error: transmute from a pointer type (`*const i32`) to a reference type (`&_issue1231::Foo<'_, &u8>`) error: transmute from a pointer type (`*const i32`) to a reference type (`&_issue1231::Foo<'_, &u8>`)
--> $DIR/transmute_ptr_to_ref.rs:37:33 --> $DIR/transmute_ptr_to_ref.rs:38:33
| |
LL | let _: &Foo<&u8> = unsafe { std::mem::transmute::<_, &Foo<&_>>(raw) }; LL | let _: &Foo<&u8> = unsafe { std::mem::transmute::<_, &Foo<&_>>(raw) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*raw.cast::<Foo<&_>>()` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*raw.cast::<Foo<&_>>()`
error: transmute from a pointer type (`*const i32`) to a reference type (`&u8`) error: transmute from a pointer type (`*const i32`) to a reference type (`&u8`)
--> $DIR/transmute_ptr_to_ref.rs:41:14 --> $DIR/transmute_ptr_to_ref.rs:42:22
| |
LL | unsafe { std::mem::transmute::<_, Bar>(raw) }; LL | let _ = unsafe { std::mem::transmute::<_, Bar>(raw) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(raw as *const u8)` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(raw as *const u8)`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`) error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:46:14 --> $DIR/transmute_ptr_to_ref.rs:47:14
| |
LL | 0 => std::mem::transmute(x), LL | 0 => std::mem::transmute(x),
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&u32>()` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`) error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:47:14 --> $DIR/transmute_ptr_to_ref.rs:48:14
| |
LL | 1 => std::mem::transmute(y), LL | 1 => std::mem::transmute(y),
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*y.cast::<&u32>()` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*y.cast::<&u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`) error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:48:14 --> $DIR/transmute_ptr_to_ref.rs:49:14
| |
LL | 2 => std::mem::transmute::<_, &&'b u32>(x), LL | 2 => std::mem::transmute::<_, &&'b u32>(x),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&'b u32>()` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&'b u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`) error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:49:14 --> $DIR/transmute_ptr_to_ref.rs:50:14
| |
LL | _ => std::mem::transmute::<_, &&'b u32>(y), LL | _ => std::mem::transmute::<_, &&'b u32>(y),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*y.cast::<&'b u32>()` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*y.cast::<&'b u32>()`
error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`) error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`)
--> $DIR/transmute_ptr_to_ref.rs:57:19 --> $DIR/transmute_ptr_to_ref.rs:58:19
| |
LL | let _: &u32 = std::mem::transmute(a); LL | let _: &u32 = std::mem::transmute(a);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*a` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*a`
error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`) error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`)
--> $DIR/transmute_ptr_to_ref.rs:58:19 --> $DIR/transmute_ptr_to_ref.rs:59:19
| |
LL | let _: &u32 = std::mem::transmute::<_, &u32>(a); LL | let _: &u32 = std::mem::transmute::<_, &u32>(a);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*a.cast::<u32>()` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*a.cast::<u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`) error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:60:14 --> $DIR/transmute_ptr_to_ref.rs:61:14
| |
LL | 0 => std::mem::transmute(x), LL | 0 => std::mem::transmute(x),
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&u32>()` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&u32>()`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`) error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:61:14 --> $DIR/transmute_ptr_to_ref.rs:62:14
| |
LL | _ => std::mem::transmute::<_, &&'b u32>(x), LL | _ => std::mem::transmute::<_, &&'b u32>(x),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&'b u32>()` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*x.cast::<&'b u32>()`
error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`) error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`)
--> $DIR/transmute_ptr_to_ref.rs:69:19 --> $DIR/transmute_ptr_to_ref.rs:70:19
| |
LL | let _: &u32 = std::mem::transmute(a); LL | let _: &u32 = std::mem::transmute(a);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*a` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*a`
error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`) error: transmute from a pointer type (`*const u32`) to a reference type (`&u32`)
--> $DIR/transmute_ptr_to_ref.rs:70:19 --> $DIR/transmute_ptr_to_ref.rs:71:19
| |
LL | let _: &u32 = std::mem::transmute::<_, &u32>(a); LL | let _: &u32 = std::mem::transmute::<_, &u32>(a);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(a as *const u32)` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(a as *const u32)`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`) error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:72:14 --> $DIR/transmute_ptr_to_ref.rs:73:14
| |
LL | 0 => std::mem::transmute(x), LL | 0 => std::mem::transmute(x),
| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(x as *const () as *const &u32)` | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(x as *const () as *const &u32)`
error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`) error: transmute from a pointer type (`*const &u32`) to a reference type (`&&u32`)
--> $DIR/transmute_ptr_to_ref.rs:73:14 --> $DIR/transmute_ptr_to_ref.rs:74:14
| |
LL | _ => std::mem::transmute::<_, &&'b u32>(x), LL | _ => std::mem::transmute::<_, &&'b u32>(x),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(x as *const () as *const &'b u32)` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(x as *const () as *const &'b u32)`