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.
let pattern = #"(?<=^|[\n;](?:[\t ]*(?:\w+ )?)?)export\s*default(?:\s*(?<modifiers>(?:abstract(?= *class)|async(?=[\S ]))+))?(?:\s*(?<kind>class|const +enum|enum|function\*?(?=[ (])|interface|namespace|type(?! *\{)))?(?:\s*(?<exports>[$_\p{ID_Start}][$\u200C\u200D\p{ID_Continue}]*)(?=(?:\s*[\n({;])|(?:\s*=\s*\{)|$))?"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = #"""
export default function () { /* … */ }
export default async function() { /* … */ }
export default function* () { /* … */ }
export default async function* () { /* … */ }
export default class { /* … */ }
export default async function functionName() { /* … */ }
export default function functionName() { /* … */ }
export default function* generatorName() { /* … */ }
export default async function* generatorNameAsync() { /* … */ }
export default class ClassName { /* … */ }
export default abstract class ClassName { /* … */ }
export default type Options = {}
export default async () => {}
export default async arg => {}
export default () => {}
export default arg => {}
export default (arg) => {}
export default foo
export default foo;export default foo
export default 1 + 1;
export default {};
declare module 'module-name' {
export default class ClassName { /* … */ }
}
"export default type Options = {}"
/*export default foo */
/* export default foo */
//export default foo
// export default foo
/**
* Resolvable file extensions.
*
* @example
* export default async function read () {}
*/
export default type Options = {}
"""#
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