import Foundation
let pattern = ##"(?=\S)(?<text>(?<comment>(?<open>[#;]+)(?:[^\S\r\n]*)(?<value>.+))|(?<section>(?<open>\[)(?:\s*)(?<value>[^\]]*\S+)(?:[^\S\r\n]*)(?<close>\]))|(?<entry>(?<key>[^=\r\n\[\]]*\S)(?:[^\S\r\n]*)(?<delimiter>:|=)(?:[^\S\r\n]*)(?<value>[^#;\r\n]*))|(?<undefined>.+))(?<=\S)|(?<linebreaker>\r\n|\n)|(?<whitespace>[^\S\r\n]+)"##
let regex = try! NSRegularExpression(pattern: pattern, options: .caseInsensitive)
let testString = ##"""
; Comment above the section
Key0=Value0
[Section 1]
Key=Value
[EmptySection]
Dummy text
;Commented Key=Value
;The following empty lines are ignored
;
#
[ Section 2 ]#Comment after [section];
Key 1 = Value 1
Key2 = Value 2 and [text in square brackets]
EmptyKey=
[];Noname section ignored
[ Section2 ] Dummy text after section
Key3 =Value 3 (symbols [;] are included)
#Key4 = Value 4 has been commented
Dummy text before section [ Sectionnum3 ]
Key 5 = Value 5
Key6 =Value6
"""##
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