Tracking Issue for `Literal::byte_character`

[Emilgardis]

Feature gate: #![feature(proc_macro_byte_character)]

This is a tracking issue for Literal::byte_character, enabling the creation of a Literal with LitKind::Byte, representing b'a'.

Public API

impl Literal {
    pub fn byte_character(byte: u8) -> Literal;
}

Steps / History

• Implementation: implement Literal::byte_character #112711
• Final comment period (FCP)¹
• Stabilization PR

Unresolved Questions

• None yet.

Footnotes

1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩

[dtolnay]

@rust-lang/libs-api:
@rfcbot fcp merge

Previously available alternatives for forming a byte literal:

• Literal::u8_suffixed(byte) constructs a literal like 97u8

• format!("b'\\x{:02x}'", byte).parse::<Literal>().unwrap() constructs a literal like b'\x61'

• format!("b'{}'", [byte].escape_ascii()).parse::<Literal>().unwrap() constructs a literal like b'a'

This feature adds Literal::byte_character(byte) which is equivalent to the third alternative, as it is most often the one you want but is fairly challenging to come up with on your own.

[rfcbot]

Team member @dtolnay has proposed to merge this. The next step is review by the rest of the tagged team members:

• @Amanieu
• @BurntSushi
• @dtolnay
• @joshtriplett
• @m-ou-se

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

See this document for info about what commands tagged team members can give me.

[rfcbot]

🔔 This is now entering its final comment period, as per the review above. 🔔