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Document --show-type-layout in the rustdoc book

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Noah Lev 2021-09-21 19:12:10 -07:00
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src/doc/rustdoc/src/unstable-features.md
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@ -209,6 +209,22 @@ some consideration for their stability, and names that end in a number). Giving
`rustdoc` will disable this sorting and instead make it print the items in the order they appear in
the source.
### `--show-type-layout`: add a section to each type's docs describing its memory layout
Using this flag looks like this:
```bash
$ rustdoc src/lib.rs -Z unstable-options --show-type-layout
```
When this flag is passed, rustdoc will add a "Layout" section at the bottom of
each type's docs page that includes a summary of the type's memory layout as
computed by rustc. For example, rustdoc will show the size in bytes that a value
of that type will take in memory.
Note that most layout information is **completely unstable** and may even differ
between compilations.
### `--resource-suffix`: modifying the name of CSS/JavaScript in crate docs
Using this flag looks like this: