Can't name identifier the "flip table" emoticon.

[bblum]

fn _╯°□°╯︵┻━┻() {}

errors with:

table.rs:3:3: 3:4 error: unknown start of token: 9583
table.rs:3 fn _╯°□°╯︵┻━┻() {}
              ^

However, I put an underscore before the unicode, so "9583" shouldn't even be considered the start of the token. Note that the span is wrong too.

[brson]

awesome test case. let's get this in the tree pronto

[Blei]

The incorrect span is fixed with #7058.

It's not possible to name a function ╯°□°╯︵┻━┻ as these characters are not in XID_Continue, i.e. the set of unicode characters specified to be valid identifiers, which in turn is used to specify which characters can appear in valid Rust identifiers.

[bstrie]

Indeed, not every Unicode character is eligible to appear in a Rust identifier. If you think it should be otherwise, please discuss it in #4928.

[bblum]

I would not fight for it, but I will watch with interest.

[bstrie]

Closing now that #7058 has landed, which fixes the issue with the span.