import Foundation
let pattern = ##"""
(?<key>\w*) # The key.
\s*:\s* # : with optional spaces around.
(?<value> # The value.
# A string value, single or double-quoted:
(?<quote>["']) # Capture the double or single quote.
(?:\\.|.)*? # Backslash followed by anything or any char, ungreedy.
\k<quote> # The double or single quote captured before.
|
# Int and float numbers:
(?<number>[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?)
|
# true, false and null (or other constants):
(?<constant>true | false | null)
)
"""##
let regex = try! NSRegularExpression(pattern: pattern, options: .allowCommentsAndWhitespace)
let testString = ##"""
# OK for very simple stuff, such as this:
{
float: 'null',
another: "foo",
age: 45,
type: '"simple" \' quote',
comment: "Hello,\nA backslash \\, a tab \t and a \"dummy\" word.\nOk?",
important: true,
weight: 69.7,
negative: -2.5
}
Not ok for complex stuff:
{
subStaff: {
help: true,
}
}
"""##
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