import Foundation
let pattern = #"("[^\n]*"(?!\\))|(//[^\n]*$|/(?!\\)\*[\s\S]*?\*(?!\\)/)"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = ##"""
#include <stdio.h>
int main(int argc, char** argv)
{
// this comment will be removed
if (argc > 1) {
printf("Too many arguments.\n"); // this too will be removed
return 1;
}
printf("Please vist http://this.will.not.be.removed.com\n");
printf("/* This will stay */\n");
printf("\"/* This will stay too */\"\n");
printf("//and so will this\\");
// but not this
printf("just \"ano//ther\" test.");
return 0;
}
/*
this shall disappear
*/
#include <string>
int main(int argc, char** argv)
{
string foo = ""/*remove that!**/;
// Remove /* this
int butNotThis = 42;
// But do */ remove this
int bar = 4 /*remove this*/* 3; // but don't remove that 3. */
return 0;//just a comment
}/*end of the file has been reached.*/
"""##
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