src/test/ui/mismatched_types/cast-rfc0401.stderr

   1 error[E0606]: casting `*const U` as `*const V` is invalid
   2   --> $DIR/cast-rfc0401.rs:3:5
   3    |
   4 LL |     u as *const V
   5    |     ^^^^^^^^^^^^^
   6    |
   7    = note: vtable kinds may not match
   8
   9 error[E0606]: casting `*const U` as `*const str` is invalid
  10   --> $DIR/cast-rfc0401.rs:8:5
  11    |
  12 LL |     u as *const str
  13    |     ^^^^^^^^^^^^^^^
  14    |
  15    = note: vtable kinds may not match
  16
  17 error[E0609]: no field `f` on type `fn() {main}`
  18   --> $DIR/cast-rfc0401.rs:65:18
  19    |
  20 LL |     let _ = main.f as *const u32;
  21    |                  ^
  22
  23 error[E0605]: non-primitive cast: `*const u8` as `&u8`
  24   --> $DIR/cast-rfc0401.rs:29:13
  25    |
  26 LL |     let _ = v as &u8;
  27    |             ^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
  28
  29 error[E0605]: non-primitive cast: `*const u8` as `E`
  30   --> $DIR/cast-rfc0401.rs:30:13
  31    |
  32 LL |     let _ = v as E;
  33    |             ^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
  34
  35 error[E0605]: non-primitive cast: `*const u8` as `fn()`
  36   --> $DIR/cast-rfc0401.rs:31:13
  37    |
  38 LL |     let _ = v as fn();
  39    |             ^^^^^^^^^ invalid cast
  40
  41 error[E0605]: non-primitive cast: `*const u8` as `(u32,)`
  42   --> $DIR/cast-rfc0401.rs:32:13
  43    |
  44 LL |     let _ = v as (u32,);
  45    |             ^^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
  46
  47 error[E0605]: non-primitive cast: `Option<&*const u8>` as `*const u8`
  48   --> $DIR/cast-rfc0401.rs:33:13
  49    |
  50 LL |     let _ = Some(&v) as *const u8;
  51    |             ^^^^^^^^^^^^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
  52
  53 error[E0606]: casting `*const u8` as `f32` is invalid
  54   --> $DIR/cast-rfc0401.rs:35:13
  55    |
  56 LL |     let _ = v as f32;
  57    |             ^^^^^^^^
  58
  59 error[E0606]: casting `fn() {main}` as `f64` is invalid
  60   --> $DIR/cast-rfc0401.rs:36:13
  61    |
  62 LL |     let _ = main as f64;
  63    |             ^^^^^^^^^^^
  64
  65 error[E0606]: casting `&*const u8` as `usize` is invalid
  66   --> $DIR/cast-rfc0401.rs:37:13
  67    |
  68 LL |     let _ = &v as usize;
  69    |             ^^^^^^^^^^^
  70    |
  71    = help: cast through a raw pointer first
  72
  73 error[E0606]: casting `f32` as `*const u8` is invalid
  74   --> $DIR/cast-rfc0401.rs:38:13
  75    |
  76 LL |     let _ = f as *const u8;
  77    |             ^^^^^^^^^^^^^^
  78
  79 error[E0054]: cannot cast as `bool`
  80   --> $DIR/cast-rfc0401.rs:39:13
  81    |
  82 LL |     let _ = 3_i32 as bool;
  83    |             ^^^^^^^^^^^^^ help: compare with zero instead: `3_i32 != 0`
  84
  85 error[E0054]: cannot cast as `bool`
  86   --> $DIR/cast-rfc0401.rs:40:13
  87    |
  88 LL |     let _ = E::A as bool;
  89    |             ^^^^^^^^^^^^ unsupported cast
  90
  91 error[E0604]: only `u8` can be cast as `char`, not `u32`
  92   --> $DIR/cast-rfc0401.rs:41:13
  93    |
  94 LL |     let _ = 0x61u32 as char;
  95    |             ^^^^^^^^^^^^^^^ invalid cast
  96
  97 error[E0606]: casting `bool` as `f32` is invalid
  98   --> $DIR/cast-rfc0401.rs:43:13
  99    |
 100 LL |     let _ = false as f32;
 101    |             ^^^^^^^^^^^^
 102    |
 103    = help: cast through an integer first
 104
 105 error[E0606]: casting `E` as `f32` is invalid
 106   --> $DIR/cast-rfc0401.rs:44:13
 107    |
 108 LL |     let _ = E::A as f32;
 109    |             ^^^^^^^^^^^
 110    |
 111    = help: cast through an integer first
 112
 113 error[E0606]: casting `char` as `f32` is invalid
 114   --> $DIR/cast-rfc0401.rs:45:13
 115    |
 116 LL |     let _ = 'a' as f32;
 117    |             ^^^^^^^^^^
 118    |
 119    = help: cast through an integer first
 120
 121 error[E0606]: casting `bool` as `*const u8` is invalid
 122   --> $DIR/cast-rfc0401.rs:47:13
 123    |
 124 LL |     let _ = false as *const u8;
 125    |             ^^^^^^^^^^^^^^^^^^
 126
 127 error[E0606]: casting `E` as `*const u8` is invalid
 128   --> $DIR/cast-rfc0401.rs:48:13
 129    |
 130 LL |     let _ = E::A as *const u8;
 131    |             ^^^^^^^^^^^^^^^^^
 132
 133 error[E0606]: casting `char` as `*const u8` is invalid
 134   --> $DIR/cast-rfc0401.rs:49:13
 135    |
 136 LL |     let _ = 'a' as *const u8;
 137    |             ^^^^^^^^^^^^^^^^
 138
 139 error[E0606]: casting `usize` as `*const [u8]` is invalid
 140   --> $DIR/cast-rfc0401.rs:51:13
 141    |
 142 LL |     let _ = 42usize as *const [u8];
 143    |             ^^^^^^^^^^^^^^^^^^^^^^
 144
 145 error[E0607]: cannot cast thin pointer `*const u8` to fat pointer `*const [u8]`
 146   --> $DIR/cast-rfc0401.rs:52:13
 147    |
 148 LL |     let _ = v as *const [u8];
 149    |             ^^^^^^^^^^^^^^^^
 150
 151 error[E0606]: casting `&dyn Foo` as `*const str` is invalid
 152   --> $DIR/cast-rfc0401.rs:54:13
 153    |
 154 LL |     let _ = foo as *const str;
 155    |             ^^^^^^^^^^^^^^^^^
 156
 157 error[E0606]: casting `&dyn Foo` as `*mut str` is invalid
 158   --> $DIR/cast-rfc0401.rs:55:13
 159    |
 160 LL |     let _ = foo as *mut str;
 161    |             ^^^^^^^^^^^^^^^
 162
 163 error[E0606]: casting `fn() {main}` as `*mut str` is invalid
 164   --> $DIR/cast-rfc0401.rs:56:13
 165    |
 166 LL |     let _ = main as *mut str;
 167    |             ^^^^^^^^^^^^^^^^
 168
 169 error[E0606]: casting `&f32` as `*mut f32` is invalid
 170   --> $DIR/cast-rfc0401.rs:57:13
 171    |
 172 LL |     let _ = &f as *mut f32;
 173    |             ^^^^^^^^^^^^^^
 174
 175 error[E0606]: casting `&f32` as `*const f64` is invalid
 176   --> $DIR/cast-rfc0401.rs:58:13
 177    |
 178 LL |     let _ = &f as *const f64;
 179    |             ^^^^^^^^^^^^^^^^
 180
 181 error[E0606]: casting `*const [i8]` as `usize` is invalid
 182   --> $DIR/cast-rfc0401.rs:59:13
 183    |
 184 LL |     let _ = fat_sv as usize;
 185    |             ^^^^^^^^^^^^^^^
 186    |
 187    = help: cast through a thin pointer first
 188
 189 error[E0606]: casting `*const dyn Foo` as `*const [u16]` is invalid
 190   --> $DIR/cast-rfc0401.rs:68:13
 191    |
 192 LL |     let _ = cf as *const [u16];
 193    |             ^^^^^^^^^^^^^^^^^^
 194    |
 195    = note: vtable kinds may not match
 196
 197 error[E0606]: casting `*const dyn Foo` as `*const dyn Bar` is invalid
 198   --> $DIR/cast-rfc0401.rs:69:13
 199    |
 200 LL |     let _ = cf as *const dyn Bar;
 201    |             ^^^^^^^^^^^^^^^^^^^^
 202    |
 203    = note: vtable kinds may not match
 204
 205 error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
 206   --> $DIR/cast-rfc0401.rs:53:13
 207    |
 208 LL |     let _ = fat_v as *const dyn Foo;
 209    |             ^^^^^ doesn't have a size known at compile-time
 210    |
 211    = help: the trait `Sized` is not implemented for `[u8]`
 212    = note: required for the cast to the object type `dyn Foo`
 213
 214 error[E0277]: the size for values of type `str` cannot be known at compilation time
 215   --> $DIR/cast-rfc0401.rs:62:13
 216    |
 217 LL |     let _ = a as *const dyn Foo;
 218    |             ^ doesn't have a size known at compile-time
 219    |
 220    = help: the trait `Sized` is not implemented for `str`
 221    = note: required for the cast to the object type `dyn Foo`
 222
 223 error[E0606]: casting `&{float}` as `f32` is invalid
 224   --> $DIR/cast-rfc0401.rs:71:30
 225    |
 226 LL |     vec![0.0].iter().map(|s| s as f32).collect::<Vec<f32>>();
 227    |                              -^^^^^^^
 228    |                              |
 229    |                              cannot cast `&{float}` as `f32`
 230    |                              help: dereference the expression: `*s`
 231
 232 error: aborting due to 34 previous errors
 233
 234 Some errors have detailed explanations: E0054, E0277, E0604, E0605, E0606, E0607, E0609.
 235 For more information about an error, try `rustc --explain E0054`.