rust
/
nomicon
mirror of https://github.com/rust-lang/nomicon
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Update src/const-safety.md

Browse Source 
Co-authored-by: Ralf Jung <post@ralfj.de>
pull/221/head
Oli Scherer 4 years ago committed by GitHub
parent 3b1e941440
commit 338b76b250
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File

2
src/const-safety.md
Unescape View File

@ -44,7 +44,7 @@ it requires knowing the actual integer address of `S`.
The way miri handles this is by treating pointer and integer values separately. The way miri handles this is by treating pointer and integer values separately.
The most primitive kind of value in miri is a `Scalar`, and a scalar is *either* The most primitive kind of value in miri is a `Scalar`, and a scalar is *either*
a pointer (`Scalar::Ptr`) *or* a bunch of bits representing an integer a pointer (`Scalar::Ptr`) *or* a bunch of bits representing an integer
(`Scalar::Bits`). Every value of a variable of primitive type is stored as a (`Scalar::Bits`), or uninitialized. Every value of a variable of primitive type is stored as a
`Scalar`. In the code above, casting the pointer `&S` to `*const i32` and then `Scalar`. In the code above, casting the pointer `&S` to `*const i32` and then
to `usize` does not actually change the value -- we end up with a local variable to `usize` does not actually change the value -- we end up with a local variable
of type `usize` whose value is a `Scalar::Ptr`. This is not a problem in of type `usize` whose value is a `Scalar::Ptr`. This is not a problem in

Write Preview
Loading…
Cancel
Save