import Foundation
// WARNING: You included a flag that Swift doesn't support: J
// Wehn this flag is set, it allows duplicated capturing group names.
// By default, Swift captures only the last value matched for a repeated capture group.
// As an alternative, the pattern can be modified to contain one capturing group per group you want to get in the result.
let pattern = #"""
(?:(?<=^\n)|(?<=\A))
(?<list_all>
(?<list_prefix>
[\s]{0,3}
(?<list_type_any>
(?:
(?<list_type_unordered_star>(?&list_unordered_star))
|
(?<list_type_unordered_minus>(?&list_unordered_minus))
|
(?<list_type_unordered_plus>(?&list_unordered_plus))
|
(?<list_type_ordered>(?&list_ordered))
)
)
[ \t]+
)
(?<list_content>(?s:.+?))
(?<list_after>
\z
|
\n{2,}
(?=\S)
(?!
[ \t]*
(?<list_type_any2>
(?:
(?<list_type_unordered_star2>(?&list_unordered_star))
|
(?<list_type_unordered_minus2>(?&list_unordered_minus))
|
(?<list_type_unordered_plus2>(?&list_unordered_plus))
|
(?<list_type_ordered2>(?&list_ordered))
)
)
[ \t]+
)
)
)
(?(DEFINE)
(?<list_unordered_star>
[\*]
(?!
(?:
[ ]?[\*][ ]?
){2,}
)
)
(?<list_unordered_minus>
[\-]
(?!
(?:
[ ]?[\-][ ]?
){2,}
)
)
(?<list_unordered_plus>[\+])
(?<list_ordered>\d+[\.])
)
"""#
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .allowCommentsAndWhitespace])
let testString = #"""
* asterisk 1
* asterisk 2
* asterisk 3
* * *
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression