import Foundation
let pattern = #"match ([^\s=]+) = ([^;]+); // MATCH"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
some random strings that are not 'hstep' form
...
match hstep1_num00 = {eau,t,nb,v,d}; // MATCH
match hstep1_num01 = {c,bul,kv,e}; // MATCH
...
match hstep3_num00 = {u_ku,b,ntv,q}; // MATCH
match hstep3_num01 = {qq,rask,cb_p}; // MATCH
match hstep3_num02 = {c,a,ha,w,ykl}; // MATCH
match hstep3_num03 = {p,gu,enb_q_b,z,d}; // MATCH
...
some random strings that are not 'hstep' form
"""#
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