Allow none-ascii word chars in named capture groups and `backrefere…

…nces`

syntaxes/regex.tmLanguage.json

@@ -691,7 +691,7 @@
 		},
 		"capture-group-name-name": {
 			"comment": "_name;0%>",
-			"begin": "(?<=(?'bracket'<)|')\\G((?~[A-Za-z_)\"]|(?('bracket')>|')))",
+			"begin": "(?<=(?'bracket'<)|')\\G((?~[\\w)\"&&[^0-9]]|(?('bracket')>|')))",
 			"end": "(\\\\(?>u\\h{,3})?)?((?((?!\\1))>|'))|(?=(\"|\\)))",
 			"beginCaptures": { "2": { "name": "invalid.illegal.tm markup.underline regex" } },
 			"endCaptures": {
@@ -1457,7 +1457,7 @@
 				},
 				{
 					"comment": "\\k<1> \\k'-2' \\k'+003' \\k<name> \\k'name_123+5' \\k<9-2>",
-					"match": "(?D)(\\\\{2}k)(?>((?<quote>')|<)(?>((?~|(?>(?(<quote>)'|>)|\\)|(?<!\\\\)\\\\{2}*\")|.*?))(?>(?>(?>((0*)[1-9]\\d{,2}(\\d{,2}))|([a-zA-Z_]\\w*))([-+](0*)[12]?\\d{1,9})?)|([-+](0*)[1-9]\\d*)))?((?~(?('quote')'|>)|\\)|(?<!\\\\)\\\\{2}*\"))((?('quote')'|>))?)",
+					"match": "(?D)(\\\\{2}k)(?>((?<quote>')|<)(?>((?~|(?>(?(<quote>)'|>)|\\)|(?<!\\\\)\\\\{2}*\")|.*?))(?>(?>(?>((0*)[1-9]\\d{,2}(\\d{,2}))|([\\w&&[^0-9]]\\w*))([-+](0*)[12]?\\d{1,9})?)|([-+](0*)[1-9]\\d*)))?((?~(?('quote')'|>)|\\)|(?<!\\\\)\\\\{2}*\"))((?('quote')'|>))?)",
 					"captures": {
 						"1": { "name": "string.regexp.tm" },
 						"2": { "name": "constant.character.set.regexp.tm" },