mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-10 15:14:29 +00:00
c6cb0e99f3
If the whole cast expression is a unary expression (`(*x as T)`) or an addressof expression (`(&x as T)`), then not surrounding the suggestion into a block risks us changing the precedence of operators if the cast expression is followed by an operation with higher precedence than the unary operator (`(*x as T).foo()` would become `*x.foo()`, which changes what the `*` applies on). The same is true if the expression encompassing the cast expression is a unary expression or an addressof expression. The lint supports the latter case, but missed the former one. This PR fixes that. Fixes #11968
251 lines
8.2 KiB
Text
251 lines
8.2 KiB
Text
error: casting raw pointers to the same type and constness is unnecessary (`*const T` -> `*const T`)
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--> tests/ui/unnecessary_cast.rs:19:5
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LL | ptr as *const T
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| ^^^^^^^^^^^^^^^ help: try: `ptr`
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= note: `-D clippy::unnecessary-cast` implied by `-D warnings`
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= help: to override `-D warnings` add `#[allow(clippy::unnecessary_cast)]`
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error: casting integer literal to `i32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:54:5
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LL | 1i32 as i32;
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| ^^^^^^^^^^^ help: try: `1_i32`
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error: casting float literal to `f32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:55:5
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LL | 1f32 as f32;
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| ^^^^^^^^^^^ help: try: `1_f32`
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error: casting to the same type is unnecessary (`bool` -> `bool`)
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--> tests/ui/unnecessary_cast.rs:56:5
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LL | false as bool;
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| ^^^^^^^^^^^^^ help: try: `false`
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error: casting integer literal to `i32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:59:5
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LL | -1_i32 as i32;
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| ^^^^^^^^^^^^^ help: try: `-1_i32`
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error: casting integer literal to `i32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:60:5
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LL | - 1_i32 as i32;
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| ^^^^^^^^^^^^^^ help: try: `- 1_i32`
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error: casting float literal to `f32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:61:5
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LL | -1f32 as f32;
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| ^^^^^^^^^^^^ help: try: `-1_f32`
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error: casting integer literal to `i32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:62:5
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LL | 1_i32 as i32;
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| ^^^^^^^^^^^^ help: try: `1_i32`
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error: casting float literal to `f32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:63:5
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LL | 1_f32 as f32;
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| ^^^^^^^^^^^^ help: try: `1_f32`
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error: casting raw pointers to the same type and constness is unnecessary (`*const u8` -> `*const u8`)
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--> tests/ui/unnecessary_cast.rs:65:22
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LL | let _: *mut u8 = [1u8, 2].as_ptr() as *const u8 as *mut u8;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `[1u8, 2].as_ptr()`
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error: casting raw pointers to the same type and constness is unnecessary (`*const u8` -> `*const u8`)
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--> tests/ui/unnecessary_cast.rs:67:5
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LL | [1u8, 2].as_ptr() as *const u8;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `[1u8, 2].as_ptr()`
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error: casting raw pointers to the same type and constness is unnecessary (`*mut u8` -> `*mut u8`)
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--> tests/ui/unnecessary_cast.rs:69:5
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LL | [1u8, 2].as_mut_ptr() as *mut u8;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `[1u8, 2].as_mut_ptr()`
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error: casting raw pointers to the same type and constness is unnecessary (`*const u32` -> `*const u32`)
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--> tests/ui/unnecessary_cast.rs:80:5
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LL | owo::<u32>([1u32].as_ptr()) as *const u32;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `owo::<u32>([1u32].as_ptr())`
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error: casting raw pointers to the same type and constness is unnecessary (`*const u8` -> `*const u8`)
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--> tests/ui/unnecessary_cast.rs:81:5
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LL | uwu::<u32, u8>([1u32].as_ptr()) as *const u8;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `uwu::<u32, u8>([1u32].as_ptr())`
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error: casting raw pointers to the same type and constness is unnecessary (`*const u32` -> `*const u32`)
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--> tests/ui/unnecessary_cast.rs:83:5
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LL | uwu::<u32, u32>([1u32].as_ptr()) as *const u32;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `uwu::<u32, u32>([1u32].as_ptr())`
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error: casting to the same type is unnecessary (`u32` -> `u32`)
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--> tests/ui/unnecessary_cast.rs:118:5
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LL | aaa() as u32;
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| ^^^^^^^^^^^^ help: try: `aaa()`
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error: casting to the same type is unnecessary (`u32` -> `u32`)
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--> tests/ui/unnecessary_cast.rs:120:5
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LL | aaa() as u32;
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| ^^^^^^^^^^^^ help: try: `aaa()`
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error: casting integer literal to `f32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:156:9
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LL | 100 as f32;
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| ^^^^^^^^^^ help: try: `100_f32`
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error: casting integer literal to `f64` is unnecessary
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--> tests/ui/unnecessary_cast.rs:157:9
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LL | 100 as f64;
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| ^^^^^^^^^^ help: try: `100_f64`
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error: casting integer literal to `f64` is unnecessary
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--> tests/ui/unnecessary_cast.rs:158:9
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LL | 100_i32 as f64;
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| ^^^^^^^^^^^^^^ help: try: `100_f64`
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error: casting integer literal to `f32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:159:17
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LL | let _ = -100 as f32;
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| ^^^^^^^^^^^ help: try: `-100_f32`
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error: casting integer literal to `f64` is unnecessary
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--> tests/ui/unnecessary_cast.rs:160:17
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LL | let _ = -100 as f64;
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| ^^^^^^^^^^^ help: try: `-100_f64`
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error: casting integer literal to `f64` is unnecessary
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--> tests/ui/unnecessary_cast.rs:161:17
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LL | let _ = -100_i32 as f64;
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| ^^^^^^^^^^^^^^^ help: try: `-100_f64`
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error: casting float literal to `f32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:162:9
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LL | 100. as f32;
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| ^^^^^^^^^^^ help: try: `100_f32`
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error: casting float literal to `f64` is unnecessary
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--> tests/ui/unnecessary_cast.rs:163:9
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LL | 100. as f64;
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| ^^^^^^^^^^^ help: try: `100_f64`
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error: casting integer literal to `u32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:175:9
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LL | 1 as u32;
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| ^^^^^^^^ help: try: `1_u32`
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error: casting integer literal to `i32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:176:9
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LL | 0x10 as i32;
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| ^^^^^^^^^^^ help: try: `0x10_i32`
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error: casting integer literal to `usize` is unnecessary
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--> tests/ui/unnecessary_cast.rs:177:9
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LL | 0b10 as usize;
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| ^^^^^^^^^^^^^ help: try: `0b10_usize`
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error: casting integer literal to `u16` is unnecessary
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--> tests/ui/unnecessary_cast.rs:178:9
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LL | 0o73 as u16;
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| ^^^^^^^^^^^ help: try: `0o73_u16`
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error: casting integer literal to `u32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:179:9
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LL | 1_000_000_000 as u32;
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| ^^^^^^^^^^^^^^^^^^^^ help: try: `1_000_000_000_u32`
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error: casting float literal to `f64` is unnecessary
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--> tests/ui/unnecessary_cast.rs:181:9
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LL | 1.0 as f64;
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| ^^^^^^^^^^ help: try: `1.0_f64`
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error: casting float literal to `f32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:182:9
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LL | 0.5 as f32;
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| ^^^^^^^^^^ help: try: `0.5_f32`
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error: casting integer literal to `i32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:186:17
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LL | let _ = -1 as i32;
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| ^^^^^^^^^ help: try: `-1_i32`
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error: casting float literal to `f32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:187:17
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LL | let _ = -1.0 as f32;
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| ^^^^^^^^^^^ help: try: `-1.0_f32`
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error: casting to the same type is unnecessary (`i32` -> `i32`)
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--> tests/ui/unnecessary_cast.rs:193:18
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LL | let _ = &(x as i32);
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| ^^^^^^^^^^ help: try: `{ x }`
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error: casting integer literal to `i32` is unnecessary
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--> tests/ui/unnecessary_cast.rs:199:22
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LL | let _: i32 = -(1) as i32;
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| ^^^^^^^^^^^ help: try: `-1_i32`
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error: casting integer literal to `i64` is unnecessary
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--> tests/ui/unnecessary_cast.rs:201:22
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LL | let _: i64 = -(1) as i64;
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| ^^^^^^^^^^^ help: try: `-1_i64`
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error: casting float literal to `f64` is unnecessary
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--> tests/ui/unnecessary_cast.rs:208:22
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LL | let _: f64 = (-8.0 as f64).exp();
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| ^^^^^^^^^^^^^ help: try: `(-8.0_f64)`
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error: casting float literal to `f64` is unnecessary
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--> tests/ui/unnecessary_cast.rs:210:23
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LL | let _: f64 = -(8.0 as f64).exp(); // should suggest `-8.0_f64.exp()` here not to change code behavior
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| ^^^^^^^^^^^^ help: try: `8.0_f64`
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error: casting to the same type is unnecessary (`f32` -> `f32`)
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--> tests/ui/unnecessary_cast.rs:218:20
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LL | let _num = foo() as f32;
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| ^^^^^^^^^^^^ help: try: `foo()`
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error: casting to the same type is unnecessary (`usize` -> `usize`)
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--> tests/ui/unnecessary_cast.rs:228:9
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LL | (*x as usize).pow(2)
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| ^^^^^^^^^^^^^ help: try: `{ *x }`
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error: aborting due to 41 previous errors
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