Attempted to cast to/from a pointer with an unknown kind.
-Erroneous code examples:
+Erroneous code example:
```compile_fail,E0641
let b = 0 as *const _; // error
```
-Must give information for type of pointer that is being cast from/to if the
-type cannot be inferred.
+Type information must be provided if a pointer type being cast from/into another
+type which cannot be inferred:
```
// Creating a pointer from reference: type can be inferred
-let a = &(String::from("Hello world!")) as *const _; // Ok
+let a = &(String::from("Hello world!")) as *const _; // ok!
-let b = 0 as *const i32; // Ok
+let b = 0 as *const i32; // ok!
-let c: *const i32 = 0 as *const _; // Ok
+let c: *const i32 = 0 as *const _; // ok!
```