proc_macro does not have a constructor for byte literals

[CAD97]

We have Literal::string(&str) for string literals, Literal::character(char) for character literals, and Literal::byte_string(&[u8]) for byte string literals, but no Literal::byte_character(u8) for byte literals.

[wycats]

This seems important. Is there something we're missing?

[CAD97]

Byte literal chars are "just" sugar for u8, so I assume you'd be quite hard pressed to find a location where using one or the other is important (modulo a proc macro to specifically check for that). Additionally, you can always use <TokenStream as FromStr>

[wycats]

@CAD97's comments notwithstanding, I still don't get why this constructor is missing. It makes it impossible to construct a token stream that is a high-fidelity representation of the input (which can have implications for error message). It also has implications for round tripping.

[Emilgardis]

This has been added as Literal::byte_character behind #![feature(proc_macro_byte_character)], tracked in #115268