import Foundation
let pattern = ##"\b(?<![-#/])literal(?!</a>)\b"##
let regex = try! NSRegularExpression(pattern: pattern, options: .caseInsensitive)
let testString = ##"""
<p>Literal in computer science is a
<a href='http://www.google.com/something/literal#literal'>literal</a>
for representing a fixed value in source code. Almost all programming
<a href='http://www.google.com/something/else-literal#literal'>languages</a>
have notations for atomic values such as integers, floating-point
numbers, and strings, and usually for booleans and characters; some
also have notations for elements of enumerated types and compound
values such as arrays, records, and objects. An anonymous function
is a literal for the function type which is LITERAL</p>
"""##
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