rust-clippy/tests/ui/transmute.stderr

error: transmute from a reference to a pointer
  --> tests/ui/transmute.rs:31:23
   |
LL |     let _: *const T = core::intrinsics::transmute(t);
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `t as *const T`
   |
   = note: `-D clippy::useless-transmute` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::useless_transmute)]`

error: transmute from a reference to a pointer
  --> tests/ui/transmute.rs:35:21
   |
LL |     let _: *mut T = core::intrinsics::transmute(t);
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `t as *const T as *mut T`

error: transmute from a reference to a pointer
  --> tests/ui/transmute.rs:38:23
   |
LL |     let _: *const U = core::intrinsics::transmute(t);
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `t as *const T as *const U`

error: transmute from a type (`std::vec::Vec<i32>`) to itself
  --> tests/ui/transmute.rs:45:27
   |
LL |         let _: Vec<i32> = core::intrinsics::transmute(my_vec());
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: transmute from a type (`std::vec::Vec<i32>`) to itself
  --> tests/ui/transmute.rs:48:27
   |
LL |         let _: Vec<i32> = core::mem::transmute(my_vec());
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: transmute from a type (`std::vec::Vec<i32>`) to itself
  --> tests/ui/transmute.rs:51:27
   |
LL |         let _: Vec<i32> = std::intrinsics::transmute(my_vec());
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: transmute from a type (`std::vec::Vec<i32>`) to itself
  --> tests/ui/transmute.rs:54:27
   |
LL |         let _: Vec<i32> = std::mem::transmute(my_vec());
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: transmute from a type (`std::vec::Vec<i32>`) to itself
  --> tests/ui/transmute.rs:57:27
   |
LL |         let _: Vec<i32> = my_transmute(my_vec());
   |                           ^^^^^^^^^^^^^^^^^^^^^^

error: transmute from an integer to a pointer
  --> tests/ui/transmute.rs:60:31
   |
LL |         let _: *const usize = std::mem::transmute(5_isize);
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `5_isize as *const usize`

error: transmute from an integer to a pointer
  --> tests/ui/transmute.rs:65:31
   |
LL |         let _: *const usize = std::mem::transmute(1 + 1usize);
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(1 + 1usize) as *const usize`

error: transmute from a type (`*const Usize`) to the type that it points to (`Usize`)
  --> tests/ui/transmute.rs:97:24
   |
LL |         let _: Usize = core::intrinsics::transmute(int_const_ptr);
   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::crosspointer-transmute` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::crosspointer_transmute)]`

error: transmute from a type (`*mut Usize`) to the type that it points to (`Usize`)
  --> tests/ui/transmute.rs:101:24
   |
LL |         let _: Usize = core::intrinsics::transmute(int_mut_ptr);
   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: transmute from a type (`Usize`) to a pointer to that type (`*const Usize`)
  --> tests/ui/transmute.rs:104:31
   |
LL |         let _: *const Usize = core::intrinsics::transmute(my_int());
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: transmute from a type (`Usize`) to a pointer to that type (`*mut Usize`)
  --> tests/ui/transmute.rs:107:29
   |
LL |         let _: *mut Usize = core::intrinsics::transmute(my_int());
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: transmute from a `u8` to a `bool`
  --> tests/ui/transmute.rs:114:28
   |
LL |     let _: bool = unsafe { std::mem::transmute(0_u8) };
   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `0_u8 != 0`
   |
   = note: `-D clippy::transmute-int-to-bool` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::transmute_int_to_bool)]`

error: transmute from a `u16` to a `f16`
  --> tests/ui/transmute.rs:122:31
   |
LL |         let _: f16 = unsafe { std::mem::transmute(0_u16) };
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f16::from_bits(0_u16)`
   |
   = note: `-D clippy::transmute-int-to-float` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::transmute_int_to_float)]`

error: transmute from a `i16` to a `f16`
  --> tests/ui/transmute.rs:125:31
   |
LL |         let _: f16 = unsafe { std::mem::transmute(0_i16) };
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f16::from_bits(0_i16 as u16)`

error: transmute from a `u32` to a `f32`
  --> tests/ui/transmute.rs:127:31
   |
LL |         let _: f32 = unsafe { std::mem::transmute(0_u32) };
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f32::from_bits(0_u32)`

error: transmute from a `i32` to a `f32`
  --> tests/ui/transmute.rs:129:31
   |
LL |         let _: f32 = unsafe { std::mem::transmute(0_i32) };
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f32::from_bits(0_i32 as u32)`

error: transmute from a `u64` to a `f64`
  --> tests/ui/transmute.rs:131:31
   |
LL |         let _: f64 = unsafe { std::mem::transmute(0_u64) };
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f64::from_bits(0_u64)`

error: transmute from a `i64` to a `f64`
  --> tests/ui/transmute.rs:133:31
   |
LL |         let _: f64 = unsafe { std::mem::transmute(0_i64) };
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f64::from_bits(0_i64 as u64)`

error: transmute from a `u128` to a `f128`
  --> tests/ui/transmute.rs:135:32
   |
LL |         let _: f128 = unsafe { std::mem::transmute(0_u128) };
   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f128::from_bits(0_u128)`

error: transmute from a `i128` to a `f128`
  --> tests/ui/transmute.rs:137:32
   |
LL |         let _: f128 = unsafe { std::mem::transmute(0_i128) };
   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f128::from_bits(0_i128 as u128)`

error: transmute from a `u16` to a `f16`
  --> tests/ui/transmute.rs:142:39
   |
LL |         const VALUE16: f16 = unsafe { std::mem::transmute(0_u16) };
   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f16::from_bits(0_u16)`

error: transmute from a `u32` to a `f32`
  --> tests/ui/transmute.rs:144:39
   |
LL |         const VALUE32: f32 = unsafe { std::mem::transmute(0_u32) };
   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f32::from_bits(0_u32)`

error: transmute from a `i64` to a `f64`
  --> tests/ui/transmute.rs:146:39
   |
LL |         const VALUE64: f64 = unsafe { std::mem::transmute(0_i64) };
   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f64::from_bits(0_i64 as u64)`

error: transmute from a `i128` to a `f128`
  --> tests/ui/transmute.rs:148:41
   |
LL |         const VALUE128: f128 = unsafe { std::mem::transmute(0_i128) };
   |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f128::from_bits(0_i128 as u128)`

error: transmute from a `i16` to a `f16`
  --> tests/ui/transmute.rs:152:22
   |
LL |             unsafe { std::mem::transmute(v) }
   |                      ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f16::from_bits(v as u16)`

error: transmute from a `i32` to a `f32`
  --> tests/ui/transmute.rs:157:22
   |
LL |             unsafe { std::mem::transmute(v) }
   |                      ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f32::from_bits(v as u32)`

error: transmute from a `u64` to a `f64`
  --> tests/ui/transmute.rs:162:22
   |
LL |             unsafe { std::mem::transmute(v) }
   |                      ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f64::from_bits(v)`

error: transmute from a `u128` to a `f128`
  --> tests/ui/transmute.rs:167:22
   |
LL |             unsafe { std::mem::transmute(v) }
   |                      ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `f128::from_bits(v)`

error: transmute from a `u8` to a `[u8; 1]`
  --> tests/ui/transmute.rs:176:30
   |
LL |             let _: [u8; 1] = std::mem::transmute(0u8);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0u8.to_ne_bytes()`
   |
   = note: `-D clippy::transmute-num-to-bytes` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::transmute_num_to_bytes)]`

error: transmute from a `u32` to a `[u8; 4]`
  --> tests/ui/transmute.rs:179:30
   |
LL |             let _: [u8; 4] = std::mem::transmute(0u32);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0u32.to_ne_bytes()`

error: transmute from a `u128` to a `[u8; 16]`
  --> tests/ui/transmute.rs:181:31
   |
LL |             let _: [u8; 16] = std::mem::transmute(0u128);
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0u128.to_ne_bytes()`

error: transmute from a `i8` to a `[u8; 1]`
  --> tests/ui/transmute.rs:183:30
   |
LL |             let _: [u8; 1] = std::mem::transmute(0i8);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0i8.to_ne_bytes()`

error: transmute from a `i32` to a `[u8; 4]`
  --> tests/ui/transmute.rs:185:30
   |
LL |             let _: [u8; 4] = std::mem::transmute(0i32);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0i32.to_ne_bytes()`

error: transmute from a `i128` to a `[u8; 16]`
  --> tests/ui/transmute.rs:187:31
   |
LL |             let _: [u8; 16] = std::mem::transmute(0i128);
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0i128.to_ne_bytes()`

error: transmute from a `f16` to a `[u8; 2]`
  --> tests/ui/transmute.rs:190:30
   |
LL |             let _: [u8; 2] = std::mem::transmute(0.0f16);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0.0f16.to_ne_bytes()`

error: transmute from a `f32` to a `[u8; 4]`
  --> tests/ui/transmute.rs:192:30
   |
LL |             let _: [u8; 4] = std::mem::transmute(0.0f32);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0.0f32.to_ne_bytes()`

error: transmute from a `f64` to a `[u8; 8]`
  --> tests/ui/transmute.rs:194:30
   |
LL |             let _: [u8; 8] = std::mem::transmute(0.0f64);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0.0f64.to_ne_bytes()`

error: transmute from a `f128` to a `[u8; 16]`
  --> tests/ui/transmute.rs:196:31
   |
LL |             let _: [u8; 16] = std::mem::transmute(0.0f128);
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0.0f128.to_ne_bytes()`

error: transmute from a `u8` to a `[u8; 1]`
  --> tests/ui/transmute.rs:202:30
   |
LL |             let _: [u8; 1] = std::mem::transmute(0u8);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0u8.to_ne_bytes()`

error: transmute from a `u32` to a `[u8; 4]`
  --> tests/ui/transmute.rs:204:30
   |
LL |             let _: [u8; 4] = std::mem::transmute(0u32);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0u32.to_ne_bytes()`

error: transmute from a `u128` to a `[u8; 16]`
  --> tests/ui/transmute.rs:206:31
   |
LL |             let _: [u8; 16] = std::mem::transmute(0u128);
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0u128.to_ne_bytes()`

error: transmute from a `i8` to a `[u8; 1]`
  --> tests/ui/transmute.rs:208:30
   |
LL |             let _: [u8; 1] = std::mem::transmute(0i8);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0i8.to_ne_bytes()`

error: transmute from a `i32` to a `[u8; 4]`
  --> tests/ui/transmute.rs:210:30
   |
LL |             let _: [u8; 4] = std::mem::transmute(0i32);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0i32.to_ne_bytes()`

error: transmute from a `i128` to a `[u8; 16]`
  --> tests/ui/transmute.rs:212:31
   |
LL |             let _: [u8; 16] = std::mem::transmute(0i128);
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0i128.to_ne_bytes()`

error: transmute from a `f16` to a `[u8; 2]`
  --> tests/ui/transmute.rs:215:30
   |
LL |             let _: [u8; 2] = std::mem::transmute(0.0f16);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0.0f16.to_ne_bytes()`

error: transmute from a `f32` to a `[u8; 4]`
  --> tests/ui/transmute.rs:217:30
   |
LL |             let _: [u8; 4] = std::mem::transmute(0.0f32);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0.0f32.to_ne_bytes()`

error: transmute from a `f64` to a `[u8; 8]`
  --> tests/ui/transmute.rs:219:30
   |
LL |             let _: [u8; 8] = std::mem::transmute(0.0f64);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0.0f64.to_ne_bytes()`

error: transmute from a `f128` to a `[u8; 16]`
  --> tests/ui/transmute.rs:221:31
   |
LL |             let _: [u8; 16] = std::mem::transmute(0.0f128);
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `to_ne_bytes()`: `0.0f128.to_ne_bytes()`

error: transmute from a `&[u8]` to a `&str`
  --> tests/ui/transmute.rs:230:28
   |
LL |     let _: &str = unsafe { std::mem::transmute(B) };
   |                            ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `std::str::from_utf8(B).unwrap()`
   |
   = note: `-D clippy::transmute-bytes-to-str` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::transmute_bytes_to_str)]`

error: transmute from a `&mut [u8]` to a `&mut str`
  --> tests/ui/transmute.rs:233:32
   |
LL |     let _: &mut str = unsafe { std::mem::transmute(mb) };
   |                                ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `std::str::from_utf8_mut(mb).unwrap()`

error: transmute from a `&[u8]` to a `&str`
  --> tests/ui/transmute.rs:235:30
   |
LL |     const _: &str = unsafe { std::mem::transmute(B) };
   |                              ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `std::str::from_utf8_unchecked(B)`

error: aborting due to 54 previous errors