import Foundation
let pattern = #"((?:[a-zA-Z][0-9a-zA-Z]*)(?:\,\s*[a-zA-Z][0-9a-zA-Z]*){0,2})\s+in\s+([a-zA-Z][0-9a-zA-Z\.]*)"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = #"""
//초록색으로 표시되는 부분(A)에는 객체의 속성값, 키값, 인덱스값을 각각 표현할 단어를 지정합니다
//빨간색 부분(B)에는 바인딩 할 객체를 지정합니다. '.'을 통해 내부 객체에 접근할수도 있습니다.
//전체적으로 A in B의 형태를 띄게 됩니다.
val, key, index in sampleObj.inner
val, key in sampleObj.inner
val in sampleObj
"""#
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