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Update crate_name to use the attribute template #1906

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Update crate_name to use the attribute template #1906

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90d3cc3
Unwrap crate_name
ehuss Jun 21, 2025
81efbd0
Update crate_name to use the attribute template
ehuss Jun 21, 2025
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29 changes: 20 additions & 9 deletions src/crates-and-source-files.md
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Expand Up @@ -138,17 +138,28 @@ The *`no_main` [attribute]* may be applied at the crate level to disable emittin
r[crate.crate_name]
## The `crate_name` attribute

r[crate.crate_name.general]
The *`crate_name` [attribute]* may be applied at the crate level to specify the
name of the crate with the [MetaNameValueStr] syntax.
r[crate.crate_name.intro]
The *`crate_name` [attribute]* specifies the name of the crate.

```rust
#![crate_name = "mycrate"]
```
> [!EXAMPLE]
> ```rust
> #![crate_name = "mycrate"]
> ```

r[crate.crate_name.syntax]
The `crate_name` attribute uses the [MetaNameValueStr] syntax to specify the name of the crate.

r[crate.crate_name.allowed-positions]
The `crate_name` attribute may only be applied to the crate root.

r[crate.crate_name.duplicates]
Only the first `crate_name` attribute is used to determine the crate name.

> [!NOTE]
> `rustc` currently warns on following duplicate `crate_name` attributes. This may become an error in the future.

r[crate.crate_name.restriction]
The crate name must not be empty, and must only contain [Unicode alphanumeric]
or `_` (U+005F) characters.
r[crate.crate_name.required-format]
The crate name must not be empty, and must only contain [Unicode alphanumeric] or `_` (U+005F) characters.

[^phase-distinction]: This distinction would also exist in an interpreter.
Static checks like syntactic analysis, type checking, and lints should
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