rust-clippy/tests/ui/transmutes_expressible_as_ptr_casts.stderr

error: transmute from an integer to a pointer
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:17:39
   |
LL |     let _ptr_i32_transmute = unsafe { transmute::<usize, *const i32>(usize::MAX) };
   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `usize::MAX as *const i32`
   |
   = note: `-D clippy::useless-transmute` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::useless_transmute)]`

error: transmute from a pointer to a pointer
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:21:38
   |
LL |     let _ptr_i8_transmute = unsafe { transmute::<*const i32, *const i8>(ptr_i32) };
   |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::transmute-ptr-to-ptr` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::transmute_ptr_to_ptr)]`
help: use `pointer::cast` instead
   |
LL |     let _ptr_i8_transmute = unsafe { ptr_i32.cast::<i8>() };
   |                                      ~~~~~~~~~~~~~~~~~~~~

error: transmute from a pointer to a pointer
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:27:46
   |
LL |     let _ptr_to_unsized_transmute = unsafe { transmute::<*const [i32], *const [u32]>(slice_ptr) };
   |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: use an `as` cast instead
   |
LL |     let _ptr_to_unsized_transmute = unsafe { slice_ptr as *const [u32] };
   |                                              ~~~~~~~~~~~~~~~~~~~~~~~~~

error: transmute from `*const i32` to `usize` which could be expressed as a pointer cast instead
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:33:50
   |
LL |     let _usize_from_int_ptr_transmute = unsafe { transmute::<*const i32, usize>(ptr_i32) };
   |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `ptr_i32 as usize`
   |
   = note: `-D clippy::transmutes-expressible-as-ptr-casts` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::transmutes_expressible_as_ptr_casts)]`

error: transmute from a reference to a pointer
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:39:41
   |
LL |     let _array_ptr_transmute = unsafe { transmute::<&[i32; 4], *const [i32; 4]>(array_ref) };
   |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `array_ref as *const [i32; 4]`

error: transmute from `fn(usize) -> u8` to `*const usize` which could be expressed as a pointer cast instead
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:47:41
   |
LL |     let _usize_ptr_transmute = unsafe { transmute::<fn(usize) -> u8, *const usize>(foo) };
   |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `foo as *const usize`

error: transmute from `fn(usize) -> u8` to `usize` which could be expressed as a pointer cast instead
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:51:49
   |
LL |     let _usize_from_fn_ptr_transmute = unsafe { transmute::<fn(usize) -> u8, usize>(foo) };
   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `foo as usize`

error: transmute from `*const u32` to `usize` which could be expressed as a pointer cast instead
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:54:36
   |
LL |     let _usize_from_ref = unsafe { transmute::<*const u32, usize>(&1u32) };
   |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&1u32 as *const u32 as usize`

error: transmute from a reference to a pointer
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:65:14
   |
LL |     unsafe { transmute::<&[i32; 1], *const u8>(in_param) }
   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `in_param as *const [i32; 1] as *const u8`

error: transmute from `fn()` to `*const u8` which could be expressed as a pointer cast instead
  --> tests/ui/transmutes_expressible_as_ptr_casts.rs:83:28
   |
LL |     let _x: u8 = unsafe { *std::mem::transmute::<fn(), *const u8>(f) };
   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(f as *const u8)`

error: aborting due to 10 previous errors