(?!\x{2E2F})[\p{L}\p{Nl}\x{1885}-\x{1886}\x{2118}\x{212E}\x{309B}-\x{309C}\p{Mn}\p{Mc}\p{Nd}\p{Pc}\x{00B7}\x{0387}\x{1369}-\x{1371}\x{19DA}$\x{200C}\x{200D}]
(?> [0-9] (?: [0-9]+ | (?: _ [0-9] )+ )* )
(?>
(?: [1-9] _? \%{_decimal-digits} | [0-9] ) (?: \. \%{_decimal-digits}? )? |
\. \%{_decimal-digits}
)
(?> [eE] [+-]? \%{_decimal-digits} )?
\%{js:number-start} (?= \%{_decimal} \%{js:number-end} )
\%{_decimal}
(?> [1-9] _? \%{_decimal-digits} | [0-9] )
\%{js:number-start} (?= \%{_decimal-integer} n \%{js:number-end} )
\%{_decimal-integer}n
(?> 0 [bB] [01] (?: [01]+ | (?: _ [01] )+ )* )
\%{js:number-start} (?= \%{_binary-integer} n? \%{js:number-end} )
\%{_binary-integer}n?
(?> 0 [oO] [0-7] (?: [0-7]+ | (?: _ [0-7] )+ )* )
\%{js:number-start} (?= \%{_octal-integer} n? \%{js:number-end} )
\%{_octal-integer}n?
(?> 0 [xX] [0-9a-fA-F] (?: [0-9a-fA-F]+ | (?: _ [0-9a-fA-F] )+ )* )
\%{js:number-start} (?= \%{_hex-integer} n? \%{js:number-end} )
\%{_hex-integer}n?
(?: \%{js:get-keyword} | \%{js:set-keyword} )
(?= \%{js:optional-whitespace-or-comments} [:=<(] )
\%{js:before-next-token}