Cannot use backslash as a literal string in conditional return type #142
Description
i can't get phpstan to recognise \\ in a literal string:
https://phpstan.org/r/41f1530f-eaee-4e7d-8bfc-e7ccc7cfc7a7
using any other sting there makes it work just fine:
https://phpstan.org/r/a884b37d-682b-45a4-b891-1725ffd1c428
Originally posted by @mad-briller in phpstan/phpstan#7483 (comment)