-
Notifications
You must be signed in to change notification settings - Fork 532
Define byte #1772
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Merged
Merged
Define byte #1772
Changes from all commits
Commits
Show all changes
3 commits
Select commit
Hold shift + click to select a range
File filter
Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,5 +1,26 @@ | ||
r[memory] | ||
# Memory model | ||
|
||
Rust does not yet have a defined memory model. Various academics and industry professionals | ||
are working on various proposals, but for now, this is an under-defined place | ||
in the language. | ||
> [!WARNING] | ||
> The memory model of Rust is incomplete and not fully decided. | ||
|
||
r[memory.bytes] | ||
## Bytes | ||
|
||
r[memory.bytes.intro] | ||
The most basic unit of memory in Rust is a byte. | ||
|
||
> [!NOTE] | ||
> While bytes are typically lowered to hardware bytes, Rust uses an "abstract" notion of bytes that can make distinctions which are absent in hardware, such as being uninitialized, or storing part of a pointer. Those distinctions can affect whether your program has undefined behavior, so they still have tangible impact on how compiled Rust programs behave. | ||
|
||
r[memory.bytes.contents] | ||
Each byte may have one of the following values: | ||
|
||
r[memory.bytes.init] | ||
* An initialized byte containing a `u8` value and optional [provenance][std::ptr#provenance], | ||
|
||
r[memory.bytes.uninit] | ||
* An uninitialized byte. | ||
|
||
> [!NOTE] | ||
> The above list is not yet guaranteed to be exhaustive. |
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Uh oh!
There was an error while loading. Please reload this page.