src/test/ui/impl-trait/where-allowed.stderr

   1 error[E0666]: nested `impl Trait` is not allowed
   2   --> $DIR/where-allowed.rs:47:51
   3    |
   4 LL | fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() }
   5    |                                           --------^^^^^^^^^^-
   6    |                                           |       |
   7    |                                           |       nested `impl Trait` here
   8    |                                           outer `impl Trait`
   9
  10 error[E0666]: nested `impl Trait` is not allowed
  11   --> $DIR/where-allowed.rs:56:57
  12    |
  13 LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() }
  14    |                                                 --------^^^^^^^^^^-
  15    |                                                 |       |
  16    |                                                 |       nested `impl Trait` here
  17    |                                                 outer `impl Trait`
  18
  19 error[E0658]: `impl Trait` in type aliases is unstable
  20   --> $DIR/where-allowed.rs:121:16
  21    |
  22 LL |     type Out = impl Debug;
  23    |                ^^^^^^^^^^
  24    |
  25    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
  26    = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
  27
  28 error[E0658]: `impl Trait` in type aliases is unstable
  29   --> $DIR/where-allowed.rs:157:23
  30    |
  31 LL | type InTypeAlias<R> = impl Debug;
  32    |                       ^^^^^^^^^^
  33    |
  34    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
  35    = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
  36
  37 error[E0658]: `impl Trait` in type aliases is unstable
  38   --> $DIR/where-allowed.rs:161:39
  39    |
  40 LL | type InReturnInTypeAlias<R> = fn() -> impl Debug;
  41    |                                       ^^^^^^^^^^
  42    |
  43    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
  44    = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
  45
  46 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  47   --> $DIR/where-allowed.rs:15:40
  48    |
  49 LL | fn in_fn_parameter_in_parameters(_: fn(impl Debug)) { panic!() }
  50    |                                        ^^^^^^^^^^
  51
  52 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  53   --> $DIR/where-allowed.rs:19:42
  54    |
  55 LL | fn in_fn_return_in_parameters(_: fn() -> impl Debug) { panic!() }
  56    |                                          ^^^^^^^^^^
  57
  58 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  59   --> $DIR/where-allowed.rs:23:38
  60    |
  61 LL | fn in_fn_parameter_in_return() -> fn(impl Debug) { panic!() }
  62    |                                      ^^^^^^^^^^
  63
  64 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  65   --> $DIR/where-allowed.rs:27:40
  66    |
  67 LL | fn in_fn_return_in_return() -> fn() -> impl Debug { panic!() }
  68    |                                        ^^^^^^^^^^
  69
  70 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  71   --> $DIR/where-allowed.rs:31:49
  72    |
  73 LL | fn in_dyn_Fn_parameter_in_parameters(_: &dyn Fn(impl Debug)) { panic!() }
  74    |                                                 ^^^^^^^^^^
  75
  76 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  77   --> $DIR/where-allowed.rs:35:51
  78    |
  79 LL | fn in_dyn_Fn_return_in_parameters(_: &dyn Fn() -> impl Debug) { panic!() }
  80    |                                                   ^^^^^^^^^^
  81
  82 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  83   --> $DIR/where-allowed.rs:39:55
  84    |
  85 LL | fn in_dyn_Fn_parameter_in_return() -> &'static dyn Fn(impl Debug) { panic!() }
  86    |                                                       ^^^^^^^^^^
  87
  88 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  89   --> $DIR/where-allowed.rs:43:57
  90    |
  91 LL | fn in_dyn_Fn_return_in_return() -> &'static dyn Fn() -> impl Debug { panic!() }
  92    |                                                         ^^^^^^^^^^
  93
  94 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  95   --> $DIR/where-allowed.rs:47:51
  96    |
  97 LL | fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() }
  98    |                                                   ^^^^^^^^^^
  99
 100 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 101   --> $DIR/where-allowed.rs:52:53
 102    |
 103 LL | fn in_impl_Fn_return_in_parameters(_: &impl Fn() -> impl Debug) { panic!() }
 104    |                                                     ^^^^^^^^^^
 105
 106 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 107   --> $DIR/where-allowed.rs:56:57
 108    |
 109 LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() }
 110    |                                                         ^^^^^^^^^^
 111
 112 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 113   --> $DIR/where-allowed.rs:62:59
 114    |
 115 LL | fn in_impl_Fn_return_in_return() -> &'static impl Fn() -> impl Debug { panic!() }
 116    |                                                           ^^^^^^^^^^
 117
 118 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 119   --> $DIR/where-allowed.rs:67:38
 120    |
 121 LL | fn in_Fn_parameter_in_generics<F: Fn(impl Debug)> (_: F) { panic!() }
 122    |                                      ^^^^^^^^^^
 123
 124 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 125   --> $DIR/where-allowed.rs:71:40
 126    |
 127 LL | fn in_Fn_return_in_generics<F: Fn() -> impl Debug> (_: F) { panic!() }
 128    |                                        ^^^^^^^^^^
 129
 130 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 131   --> $DIR/where-allowed.rs:84:32
 132    |
 133 LL | struct InBraceStructField { x: impl Debug }
 134    |                                ^^^^^^^^^^
 135
 136 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 137   --> $DIR/where-allowed.rs:88:41
 138    |
 139 LL | struct InAdtInBraceStructField { x: Vec<impl Debug> }
 140    |                                         ^^^^^^^^^^
 141
 142 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 143   --> $DIR/where-allowed.rs:92:27
 144    |
 145 LL | struct InTupleStructField(impl Debug);
 146    |                           ^^^^^^^^^^
 147
 148 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 149   --> $DIR/where-allowed.rs:97:25
 150    |
 151 LL |     InBraceVariant { x: impl Debug },
 152    |                         ^^^^^^^^^^
 153
 154 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 155   --> $DIR/where-allowed.rs:99:20
 156    |
 157 LL |     InTupleVariant(impl Debug),
 158    |                    ^^^^^^^^^^
 159
 160 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 161   --> $DIR/where-allowed.rs:110:23
 162    |
 163 LL |     fn in_return() -> impl Debug;
 164    |                       ^^^^^^^^^^
 165
 166 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 167   --> $DIR/where-allowed.rs:128:34
 168    |
 169 LL |     fn in_trait_impl_return() -> impl Debug { () }
 170    |                                  ^^^^^^^^^^
 171
 172 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 173   --> $DIR/where-allowed.rs:141:33
 174    |
 175 LL |     fn in_foreign_parameters(_: impl Debug);
 176    |                                 ^^^^^^^^^^
 177
 178 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 179   --> $DIR/where-allowed.rs:144:31
 180    |
 181 LL |     fn in_foreign_return() -> impl Debug;
 182    |                               ^^^^^^^^^^
 183
 184 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 185   --> $DIR/where-allowed.rs:161:39
 186    |
 187 LL | type InReturnInTypeAlias<R> = fn() -> impl Debug;
 188    |                                       ^^^^^^^^^^
 189
 190 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 191   --> $DIR/where-allowed.rs:166:16
 192    |
 193 LL | impl PartialEq<impl Debug> for () {
 194    |                ^^^^^^^^^^
 195
 196 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 197   --> $DIR/where-allowed.rs:171:24
 198    |
 199 LL | impl PartialEq<()> for impl Debug {
 200    |                        ^^^^^^^^^^
 201
 202 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 203   --> $DIR/where-allowed.rs:176:6
 204    |
 205 LL | impl impl Debug {
 206    |      ^^^^^^^^^^
 207
 208 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 209   --> $DIR/where-allowed.rs:182:24
 210    |
 211 LL | impl InInherentImplAdt<impl Debug> {
 212    |                        ^^^^^^^^^^
 213
 214 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 215   --> $DIR/where-allowed.rs:188:11
 216    |
 217 LL |     where impl Debug: Debug
 218    |           ^^^^^^^^^^
 219
 220 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 221   --> $DIR/where-allowed.rs:195:15
 222    |
 223 LL |     where Vec<impl Debug>: Debug
 224    |               ^^^^^^^^^^
 225
 226 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 227   --> $DIR/where-allowed.rs:202:24
 228    |
 229 LL |     where T: PartialEq<impl Debug>
 230    |                        ^^^^^^^^^^
 231
 232 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 233   --> $DIR/where-allowed.rs:209:17
 234    |
 235 LL |     where T: Fn(impl Debug)
 236    |                 ^^^^^^^^^^
 237
 238 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 239   --> $DIR/where-allowed.rs:216:22
 240    |
 241 LL |     where T: Fn() -> impl Debug
 242    |                      ^^^^^^^^^^
 243
 244 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 245   --> $DIR/where-allowed.rs:222:29
 246    |
 247 LL |     let _in_local_variable: impl Fn() = || {};
 248    |                             ^^^^^^^^^
 249    |
 250    = help: add `#![feature(impl_trait_in_bindings)]` to the crate attributes to enable
 251
 252 error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
 253   --> $DIR/where-allowed.rs:224:46
 254    |
 255 LL |     let _in_return_in_local_variable = || -> impl Fn() { || {} };
 256    |                                              ^^^^^^^^^
 257
 258 error[E0720]: cannot resolve opaque type
 259   --> $DIR/where-allowed.rs:56:49
 260    |
 261 LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() }
 262    |                                                 ^^^^^^^^^^^^^^^^^^^   -------- this returned value is of `!` type
 263    |                                                 |
 264    |                                                 cannot resolve opaque type
 265    |
 266    = help: this error will resolve once the item's body returns a concrete type
 267
 268 error[E0720]: cannot resolve opaque type
 269   --> $DIR/where-allowed.rs:62:46
 270    |
 271 LL | fn in_impl_Fn_return_in_return() -> &'static impl Fn() -> impl Debug { panic!() }
 272    |                                              ^^^^^^^^^^^^^^^^^^^^^^^   -------- this returned value is of `!` type
 273    |                                              |
 274    |                                              cannot resolve opaque type
 275    |
 276    = help: this error will resolve once the item's body returns a concrete type
 277
 278 error: could not find defining uses
 279   --> $DIR/where-allowed.rs:121:16
 280    |
 281 LL |     type Out = impl Debug;
 282    |                ^^^^^^^^^^
 283
 284 error: could not find defining uses
 285   --> $DIR/where-allowed.rs:157:23
 286    |
 287 LL | type InTypeAlias<R> = impl Debug;
 288    |                       ^^^^^^^^^^
 289
 290 error: aborting due to 44 previous errors
 291
 292 Some errors have detailed explanations: E0562, E0658, E0666, E0720.
 293 For more information about an error, try `rustc --explain E0562`.