import Foundation
let pattern = #"""
(?=\[\[)
(?<=
{{[Ii]nfobox
(?(stack)(?!))
(?>
(?<-stack>\k<stack>)
|
(?<=(?<stack> {{ ) [^{]* ) }}
|
(?<=(?<stack>\[\[) [^\]]*) ]]
|
(?<!])] | (?<!\[)\[
|
(?<!})} | (?<!{ ){
|
[^[\]{}]
)+
)
\[\[
(?i:File|Image):[^[|\]]+\|
(?:[^[|\]]*\|)*
(?>
[^[\]{}]
|
\[(?!\[) | ](?!])
|
{ (?!{ ) | }(?!})
|
\[\[(?= [^\]]* (?<stack2>\]\]))
|
{{ (?= [^}]* (?<stack2> }} ))
|
(?<-stack2>\k<stack2>)
)*
(?(stack2)(?!))
\]\]
"""#
let regex = try! NSRegularExpression(pattern: pattern, options: .allowCommentsAndWhitespace)
let testString = #"""
{{Infobox xyz
|aaa= Xyz
|bbb= [[Xyz]]
|ccc=[[File:xyz.jpg|thumb|Xyz.]]
|ddd= {{lang|en|xyz}}
|eee=[[File:xyz.jpg|thumb|Xyz.]]
|eee=[[File:xyz.jpg|thumb|Xyz. [[Link]] in caption.]]
}}
[[File:abc.jpg|thumb|Abc.]]
{{foo|[[File:abc.jpg|thumb|Abc.]]}}
"""#
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