I want to use ForEach in RegexBuilder like SwiftUI

Question

Created Aug ’22

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let words = ["@apple", "#swift"]

let regex = Regex {
  ChoiceOf {
    ForEach(words, id: \.self) { word in
      OneOrMore(word)
    }
  }
}

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Answer 1

zunda OP

Aug ’22

I use RegexComponentBuilder.buildPartialBlock but different result

let words = ["@apple", "#swift"]

func getRegex() -> some RegexComponent {
  var regex = RegexComponentBuilder.buildPartialBlock(first: Regex { words.first! } )

  for word in words[1...] {
    regex = RegexComponentBuilder.buildPartialBlock(accumulated: regex, next: Regex { word })
  }

  return ChoiceOf { regex }
}

let regex1 = getRegex()
let regex2 = Regex {
  ChoiceOf {
    "@swift"
    "#swift"
  }
}

let string = "aaa @swift #swift aaa"

for match in string.matches(of: regex1) {
  print(String(string[match.range]))
} // print ""

for match in string.matches(of: regex2) {
  print(String(string[match.range]))
} // @swift #swift

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