CWG2573 Undefined behavior when splicing results in a universal-character-name

[jensmaurer]

CWG solicits input from SG12 regarding addressing the undefined behavior in [lex.phases] p1.2

See CWG2573 for details.

[cor3ntin]

See also P2621 UB? In my Lexer? #1283

[cor3ntin]

P2621 was adopted

[jensmaurer]

@cor3ntin , please don't close these CWG-related issues. I also need to update the CWG issues list with the outcome. Feel free to assign them back to CWG.

[jensmaurer]

CWG2573 updated.