Function isValidSemver

lib/validator/component_name.cpp:233–272

MAJOR.MINOR.PATCH[-prerelease][+build] per semver.org 2.0

// MAJOR.MINOR.PATCH[-prerelease][+build] per semver.org 2.0
bool isValidSemver(std::string_view V) {
  if (V.empty())
    return false;

  // Parse MAJOR.MINOR.PATCH
  for (int I = 0; I < 3; I++) {
    size_t End = parseNumeric(V);
    if (End == std::string_view::npos)
      return false;
    if (I < 2) {
      if (End >= V.size() || V[End] != '.')
        return false;
      V.remove_prefix(End + 1);
    } else {
      V.remove_prefix(End);
    }
  }

  if (V.empty())
    return true;

  if (V[0] == '-') {
    V.remove_prefix(1);
    size_t PlusPos = V.find('+');
    std::string_view PreRelease =
        (PlusPos == V.npos) ? V : V.substr(0, PlusPos);
    if (!isPreReleaseOrBuild(PreRelease, true))
      return false;
    if (PlusPos == V.npos)
      return true;
    V.remove_prefix(PlusPos);
  }

  if (!V.empty() && V[0] == '+') {
    V.remove_prefix(1);
    return isPreReleaseOrBuild(V, false);
  }

  return V.empty();
}

bool isVersion(std::string_view V) {
  return isCanonVersion(V) || isValidSemver(V);