Function isKebabString

lib/validator/component_name.cpp:24–58

label ::= ( '-' ) first-fragment ::= | first-word ::= [a-z] [0-9a-z] first-acronym ::= [A-Z] [0-9A-Z] fragment ::= | word ::= [0-9a-z]+ acronym ::= [0-9A-Z]+

// word           ::= [0-9a-z]+
// acronym        ::= [0-9A-Z]+
bool isKebabString(std::string_view Input) {
  bool IsFirstPart = true;
  bool Uppercase = false;
  bool Lowercase = false;
  bool Digit = false;

  for (char C : Input) {
    if (islower(C)) {
      if (Uppercase)
        return false;
      Lowercase = true;
    } else if (isupper(C)) {
      if (Lowercase)
        return false;
      Uppercase = true;
    } else if (isdigit(C)) {
      if (IsFirstPart && !(Uppercase || Lowercase))
        return false;
      Digit = true;
    } else if (C == '-') {
      if (Uppercase || Lowercase || Digit) {
        IsFirstPart = false;
        Uppercase = false;
        Lowercase = false;
        Digit = false;
      } else {
        return false;
      }
    } else {
      return false;
    }
  }

  return Input.size() > 0 && Input.back() != '-';
}

namespace {