Tracking issue for RFC 2421, "Keyword unreservations (pure, sizeof, alignof, offsetof)"

[Centril]

This is a tracking issue for the RFC "Keyword unreservations (pure, sizeof, alignof, offsetof)" (rust-lang/rfcs#2421).

Steps:

• Implement the RFC (repeat things done in Removed 'proc' from the reserved keywords list #49699)
  • Adjust documentation (see instructions on forge)

Unresolved questions:

None

[Havvy]

I'm going to tackle this one.

[Havvy]

Do I remove the file as per the previous PR, or do I change the expected error message?

unexpected errors (from JSON output): [
    Error {
        line_num: 13,
        kind: Some(
            Error
        ),
        msg: "13:6: 13:8: expected one of `!` or `::`, found `fn`"
    }
]

not found errors (from test file): [
    Error {
        line_num: 13,
        kind: Some(
            Error
        ),
        msg: "expected item, found `pure`"
    }
]

[Havvy]

The file code is just pure fn foo() {}

[Centril]

Should this be closed now?

[Centril]

This is stable now; closing..