mathieu/os-rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Auto merge of #76463 - camelid:improve-E0607-explanation, r=jyn514

Browse source 
Improve wording of E0607 explanation

`@rustbot` modify labels: A-diagnostics C-enhancement
This commit is contained in:
bors 2020-09-09 06:33:03 +00:00
commit 0855263dcd
1 changed files with 7 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
compiler/rustc_error_codes/src/error_codes/E0607.md
View file

@ -12,15 +12,15 @@ First: what are thin and fat pointers?
Thin pointers are "simple" pointers: they are purely a reference to a memory
address.
Fat pointers are pointers referencing Dynamically Sized Types (also called DST).
DST don't have a statically known size, therefore they can only exist behind
some kind of pointers that contain additional information. Slices and trait
objects are DSTs. In the case of slices, the additional information the fat
pointer holds is their size.
Fat pointers are pointers referencing Dynamically Sized Types (also called
DSTs). DSTs don't have a statically known size, therefore they can only exist
behind some kind of pointer that contains additional information. For example,
slices and trait objects are DSTs. In the case of slices, the additional
information the fat pointer holds is their size.
To fix this error, don't try to cast directly between thin and fat pointers.
For more information about casts, take a look at the Type cast section in
[The Reference Book][1].
For more information about type casts, take a look at the section of the
[The Rust Reference][1] on type cast expressions.
[1]: https://doc.rust-lang.org/reference/expressions/operator-expr.html#type-cast-expressions