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clean up E0641 explanation

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This commit is contained in:
Guillaume Gomez 2020-06-03 13:52:09 +02:00
parent 680a4b2fbd
commit 64b5520757
1 changed files with 6 additions and 6 deletions
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12
src/librustc_error_codes/error_codes/E0641.md
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@ -1,19 +1,19 @@
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!
```