compiler/rustc_error_codes/src/error_codes/E0425.md

   1 An unresolved name was used.
   2
   3 Erroneous code examples:
   4
   5 ```compile_fail,E0425
   6 something_that_doesnt_exist::foo;
   7 // error: unresolved name `something_that_doesnt_exist::foo`
   8
   9 // or:
  10
  11 trait Foo {
  12     fn bar() {
  13         Self; // error: unresolved name `Self`
  14     }
  15 }
  16
  17 // or:
  18
  19 let x = unknown_variable;  // error: unresolved name `unknown_variable`
  20 ```
  21
  22 Please verify that the name wasn't misspelled and ensure that the
  23 identifier being referred to is valid for the given situation. Example:
  24
  25 ```
  26 enum something_that_does_exist {
  27     Foo,
  28 }
  29 ```
  30
  31 Or:
  32
  33 ```
  34 mod something_that_does_exist {
  35     pub static foo : i32 = 0i32;
  36 }
  37
  38 something_that_does_exist::foo; // ok!
  39 ```
  40
  41 Or:
  42
  43 ```
  44 let unknown_variable = 12u32;
  45 let x = unknown_variable; // ok!
  46 ```
  47
  48 If the item is not defined in the current module, it must be imported using a
  49 `use` statement, like so:
  50
  51 ```
  52 # mod foo { pub fn bar() {} }
  53 # fn main() {
  54 use foo::bar;
  55 bar();
  56 # }
  57 ```
  58
  59 If the item you are importing is not defined in some super-module of the
  60 current module, then it must also be declared as public (e.g., `pub fn`).