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 //~ ERROR is invalid
   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 //~ ERROR is invalid
  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; //~ ERROR no field
  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; //~ ERROR non-primitive cast
  27    |             ^^^^^^^^
  28    |
  29    = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait
  30
  31 error[E0605]: non-primitive cast: `*const u8` as `E`
  32   --> $DIR/cast-rfc0401.rs:30:13
  33    |
  34 LL |     let _ = v as E; //~ ERROR non-primitive cast
  35    |             ^^^^^^
  36    |
  37    = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait
  38
  39 error[E0605]: non-primitive cast: `*const u8` as `fn()`
  40   --> $DIR/cast-rfc0401.rs:31:13
  41    |
  42 LL |     let _ = v as fn(); //~ ERROR non-primitive cast
  43    |             ^^^^^^^^^
  44    |
  45    = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait
  46
  47 error[E0605]: non-primitive cast: `*const u8` as `(u32,)`
  48   --> $DIR/cast-rfc0401.rs:32:13
  49    |
  50 LL |     let _ = v as (u32,); //~ ERROR non-primitive cast
  51    |             ^^^^^^^^^^^
  52    |
  53    = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait
  54
  55 error[E0605]: non-primitive cast: `std::option::Option<&*const u8>` as `*const u8`
  56   --> $DIR/cast-rfc0401.rs:33:13
  57    |
  58 LL |     let _ = Some(&v) as *const u8; //~ ERROR non-primitive cast
  59    |             ^^^^^^^^^^^^^^^^^^^^^
  60    |
  61    = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait
  62
  63 error[E0606]: casting `*const u8` as `f32` is invalid
  64   --> $DIR/cast-rfc0401.rs:35:13
  65    |
  66 LL |     let _ = v as f32; //~ ERROR is invalid
  67    |             ^^^^^^^^
  68
  69 error[E0606]: casting `fn() {main}` as `f64` is invalid
  70   --> $DIR/cast-rfc0401.rs:36:13
  71    |
  72 LL |     let _ = main as f64; //~ ERROR is invalid
  73    |             ^^^^^^^^^^^
  74
  75 error[E0606]: casting `&*const u8` as `usize` is invalid
  76   --> $DIR/cast-rfc0401.rs:37:13
  77    |
  78 LL |     let _ = &v as usize; //~ ERROR is invalid
  79    |             ^^^^^^^^^^^
  80    |
  81    = help: cast through a raw pointer first
  82
  83 error[E0606]: casting `f32` as `*const u8` is invalid
  84   --> $DIR/cast-rfc0401.rs:38:13
  85    |
  86 LL |     let _ = f as *const u8; //~ ERROR is invalid
  87    |             ^^^^^^^^^^^^^^
  88
  89 error[E0054]: cannot cast as `bool`
  90   --> $DIR/cast-rfc0401.rs:39:13
  91    |
  92 LL |     let _ = 3_i32 as bool; //~ ERROR cannot cast
  93    |             ^^^^^^^^^^^^^ help: compare with zero instead: `3_i32 != 0`
  94
  95 error[E0054]: cannot cast as `bool`
  96   --> $DIR/cast-rfc0401.rs:40:13
  97    |
  98 LL |     let _ = E::A as bool; //~ ERROR cannot cast
  99    |             ^^^^^^^^^^^^ unsupported cast
 100
 101 error[E0604]: only `u8` can be cast as `char`, not `u32`
 102   --> $DIR/cast-rfc0401.rs:41:13
 103    |
 104 LL |     let _ = 0x61u32 as char; //~ ERROR can be cast as
 105    |             ^^^^^^^^^^^^^^^
 106
 107 error[E0606]: casting `bool` as `f32` is invalid
 108   --> $DIR/cast-rfc0401.rs:43:13
 109    |
 110 LL |     let _ = false as f32; //~ ERROR is invalid
 111    |             ^^^^^^^^^^^^
 112    |
 113    = help: cast through an integer first
 114
 115 error[E0606]: casting `E` as `f32` is invalid
 116   --> $DIR/cast-rfc0401.rs:44:13
 117    |
 118 LL |     let _ = E::A as f32; //~ ERROR is invalid
 119    |             ^^^^^^^^^^^
 120    |
 121    = help: cast through an integer first
 122
 123 error[E0606]: casting `char` as `f32` is invalid
 124   --> $DIR/cast-rfc0401.rs:45:13
 125    |
 126 LL |     let _ = 'a' as f32; //~ ERROR is invalid
 127    |             ^^^^^^^^^^
 128    |
 129    = help: cast through an integer first
 130
 131 error[E0606]: casting `bool` as `*const u8` is invalid
 132   --> $DIR/cast-rfc0401.rs:47:13
 133    |
 134 LL |     let _ = false as *const u8; //~ ERROR is invalid
 135    |             ^^^^^^^^^^^^^^^^^^
 136
 137 error[E0606]: casting `E` as `*const u8` is invalid
 138   --> $DIR/cast-rfc0401.rs:48:13
 139    |
 140 LL |     let _ = E::A as *const u8; //~ ERROR is invalid
 141    |             ^^^^^^^^^^^^^^^^^
 142
 143 error[E0606]: casting `char` as `*const u8` is invalid
 144   --> $DIR/cast-rfc0401.rs:49:13
 145    |
 146 LL |     let _ = 'a' as *const u8; //~ ERROR is invalid
 147    |             ^^^^^^^^^^^^^^^^
 148
 149 error[E0606]: casting `usize` as `*const [u8]` is invalid
 150   --> $DIR/cast-rfc0401.rs:51:13
 151    |
 152 LL |     let _ = 42usize as *const [u8]; //~ ERROR is invalid
 153    |             ^^^^^^^^^^^^^^^^^^^^^^
 154
 155 error[E0607]: cannot cast thin pointer `*const u8` to fat pointer `*const [u8]`
 156   --> $DIR/cast-rfc0401.rs:52:13
 157    |
 158 LL |     let _ = v as *const [u8]; //~ ERROR cannot cast
 159    |             ^^^^^^^^^^^^^^^^
 160
 161 error[E0606]: casting `&dyn Foo` as `*const str` is invalid
 162   --> $DIR/cast-rfc0401.rs:54:13
 163    |
 164 LL |     let _ = foo as *const str; //~ ERROR is invalid
 165    |             ^^^^^^^^^^^^^^^^^
 166
 167 error[E0606]: casting `&dyn Foo` as `*mut str` is invalid
 168   --> $DIR/cast-rfc0401.rs:55:13
 169    |
 170 LL |     let _ = foo as *mut str; //~ ERROR is invalid
 171    |             ^^^^^^^^^^^^^^^
 172
 173 error[E0606]: casting `fn() {main}` as `*mut str` is invalid
 174   --> $DIR/cast-rfc0401.rs:56:13
 175    |
 176 LL |     let _ = main as *mut str; //~ ERROR is invalid
 177    |             ^^^^^^^^^^^^^^^^
 178
 179 error[E0606]: casting `&f32` as `*mut f32` is invalid
 180   --> $DIR/cast-rfc0401.rs:57:13
 181    |
 182 LL |     let _ = &f as *mut f32; //~ ERROR is invalid
 183    |             ^^^^^^^^^^^^^^
 184
 185 error[E0606]: casting `&f32` as `*const f64` is invalid
 186   --> $DIR/cast-rfc0401.rs:58:13
 187    |
 188 LL |     let _ = &f as *const f64; //~ ERROR is invalid
 189    |             ^^^^^^^^^^^^^^^^
 190
 191 error[E0606]: casting `*const [i8]` as `usize` is invalid
 192   --> $DIR/cast-rfc0401.rs:59:13
 193    |
 194 LL |     let _ = fat_sv as usize; //~ ERROR is invalid
 195    |             ^^^^^^^^^^^^^^^
 196    |
 197    = help: cast through a thin pointer first
 198
 199 error[E0606]: casting `*const dyn Foo` as `*const [u16]` is invalid
 200   --> $DIR/cast-rfc0401.rs:68:13
 201    |
 202 LL |     let _ = cf as *const [u16]; //~ ERROR is invalid
 203    |             ^^^^^^^^^^^^^^^^^^
 204    |
 205    = note: vtable kinds may not match
 206
 207 error[E0606]: casting `*const dyn Foo` as `*const dyn Bar` is invalid
 208   --> $DIR/cast-rfc0401.rs:69:13
 209    |
 210 LL |     let _ = cf as *const Bar; //~ ERROR is invalid
 211    |             ^^^^^^^^^^^^^^^^
 212    |
 213    = note: vtable kinds may not match
 214
 215 error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
 216   --> $DIR/cast-rfc0401.rs:53:13
 217    |
 218 LL |     let _ = fat_v as *const Foo; //~ ERROR the size for values of type
 219    |             ^^^^^ doesn't have a size known at compile-time
 220    |
 221    = help: the trait `std::marker::Sized` is not implemented for `[u8]`
 222    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
 223    = note: required for the cast to the object type `dyn Foo`
 224
 225 error[E0277]: the size for values of type `str` cannot be known at compilation time
 226   --> $DIR/cast-rfc0401.rs:62:13
 227    |
 228 LL |     let _ = a as *const Foo; //~ ERROR the size for values of type
 229    |             ^ doesn't have a size known at compile-time
 230    |
 231    = help: the trait `std::marker::Sized` is not implemented for `str`
 232    = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
 233    = note: required for the cast to the object type `dyn Foo`
 234
 235 error[E0606]: casting `&{float}` as `f32` is invalid
 236   --> $DIR/cast-rfc0401.rs:71:30
 237    |
 238 LL |     vec![0.0].iter().map(|s| s as f32).collect::<Vec<f32>>(); //~ ERROR is invalid
 239    |                              -^^^^^^^
 240    |                              |
 241    |                              cannot cast `&{float}` as `f32`
 242    |                              help: dereference the expression: `*s`
 243
 244 error: aborting due to 34 previous errors
 245
 246 Some errors occurred: E0054, E0277, E0604, E0605, E0606, E0607, E0609.
 247 For more information about an error, try `rustc --explain E0054`.