Function loose_attribute_names
pub fn loose_attribute_names(raw: &str) -> Vec<String>Expand description
The name of every attribute in raw, read loosely: after each run
of @s outside strings and groups, whitespace is skipped, the text up
to the next (, whitespace, @ or quote is taken, everything in it
but letters, digits and _ is dropped, and the rest is lower-cased.
A default-ignorable character is dropped even when it counts as a
letter (the Hangul filler U+3164 does).
@ Deny (x) gives deny, and so do @@de\u{200B}ny(x) (a zero-width
space) and @@de-ny(x): an invisible or punctuation character inside
the name must not turn a policy into an unknown, inert attribute. For
re-checking that no attribute a reader would take for a policy was
skipped, whatever its spelling.