import Foundation
// WARNING: You included a flag that Swift doesn't support: u
// When this flag is set, it makes the pattern and subject strings to be treated as unicode.
// Swift already treats the pattern and subject strings as unicode by default, so including this flag is redundant.
// WARNING: You included a flag that Swift doesn't support: J
// Wehn this flag is set, it allows duplicated capturing group names.
// By default, Swift captures only the last value matched for a repeated capture group.
// As an alternative, the pattern can be modified to contain one capturing group per group you want to get in the result.
let pattern = #"""
(?<number>
(?:
\d+
(?:\.\d*)?
)|
(?:\d*\.\d+)
)|
(?<immediate>
(?<str>
(?:
'
(?<__str__>
(?:[^'\\]|\\')*
)
'
)|
(?:
\
(?<__str__>.)
)
)|
(?<operator>
(?:
p|
\»|
R|
\_|
\-|
\°|
r|
\∩|
\«|
\∞|
\∅|
\~|
\/|
\]|
C|
\%|
P|
\*|
\^|
\∪|
d|
\[|
F|
l|
s|
\!|
\+|
\=|
h|
f|
c
)
)|
(?<apply>\$)|
(?<space>\s+)
)
"""#
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .allowCommentsAndWhitespace])
let testString = #"a '234'"#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
if let firstMatch = regex.firstMatch(in: testString, range: stringRange) {
let result: [String] = (1 ..< firstMatch.numberOfRanges).map { (testString as NSString).substring(with: firstMatch.range(at: $0)) }
print(result)
} else {
print("No matches were found.")
}
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