import Foundation
let pattern = ##"""
# Only include if previous char was start of string or delimiter
(?<=^|,)
(?:
# 1st option: empty quoted string (,'',)
'{2}
|
# 2nd option: nothing (,,)
(?:)
|
# 3rd option: all but quoted strings (,123,)
# (included linebreaks to allow multiline matching)
[^,'\r\n]+
|
# 4th option: quoted strings (,'123''321',)
# start pling
'
(?:
# double quote
'{2}
|
# or anything but quotes
[^']+
# at least one occurance - greedy
)+
# end pling
'
)
# Only include if next char is delimiter or end of string
(?=,|$)
"""##
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .allowCommentsAndWhitespace])
let testString = #"""
12,'',',''',123
123,2.99,AMO024,Title,'Description, more info',,123987564
"""#
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