import Foundation
let pattern = ##"""
(?:(?<=\n)|(?<=\A)) # Necessarily at the begining of a new line or start of string
(?<code_all>
(?<code_start>
[ ]{0,3} # Possibly up to 3 leading spaces
\`{3,} # 3 code marks (backticks) or more
)
\n+
(?<code_content>.*?) # enclosed content
\n+
(?<!`)
\g{code_start} # balanced closing block marks
(?!`)
[ \t]* # possibly followed by some space
\n
)
"""##
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .allowCommentsAndWhitespace, .dotMatchesLineSeparators])
let testString = #"""
Plop
```
<p>```
~~~
<p>```
```
Some *markdown*
```
<div>
<html>
```
```
function test();
```
<div markdown="1">
```
<p>```
~~~
<p>```
```
```
<p>```
~~~
<p>```
```
~~~
<p>```
```
<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