import Foundation
let pattern = ##"""
(?(DEFINE)
(?<number> (?>-? (?= [1-9]|0(?!\d) ) \d+ (\.\d+)? ([eE] [+-]? \d+)?) )
(?<boolean> (?> true | false | null ))
(?<unquoted> (?> ([^"\\]* | \\ ["\\bfnrt\/] | \\ u [0-9a-f]{4} )* ))
(?<string> (?>" (?&unquoted) " ))
(?<array> (?> \[ (?: (?&json) (?: , (?&json) )* )? \s* \] ))
(?<pair> (?> \s* (?&string) \s* : (?&json) ))
(?<object> (?>\{ (?: (?&pair) (?: , (?&pair) )* )? \s* \} ))
(?<json> (?>\s* (?: (?&number) | (?&boolean) | (?&string) | (?&array) | (?&object) ) \s* ))
)
(?<=") # Lookbehind for quote before parent key string
(?&unquoted) # parent key string
(?= # Lookahead for object properties including unique property marker
"\s*:\s*{\s*
(?: (?&pair) (?: , (?&pair) )* )? # any number of property key value pairs, optional.
(?:(?:\s* , )?\s* "type"\s*:\s*"title") # unique property marker, optionally perfixed with comma.
(?: \s*, (?&pair) )* # any number of property key value pairs, optional.
\s*}
)
"""##
let regex = try! NSRegularExpression(pattern: pattern, options: .allowCommentsAndWhitespace)
let testString = #"""
..
"id": "Xkt@",
"name": "My Email",
"type": "email"
},
"Item of Equipment": {
"id": "title",
"title": {},
"name": "Item of Equipment",
"type": "title"
},
"My Date": {
"id": "nYcK",
"name": "My Date",
"type": "date",
..
"Item of Equipment": {
"type": "title",
"id": "title",
"title": {},
"name": "Item of Equipment"
},
"""#
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