Function isCanonVersion

lib/validator/component_name.cpp:185–200

canonversion ::= [1-9] [0-9] | '0.' [1-9] [0-9] | '0.0.' [1-9] [0-9]

//                | '0.' [1-9] [0-9]*
//                | '0.0.' [1-9] [0-9]*
bool isCanonVersion(std::string_view V) {
  if (V.empty())
    return false;

  // canonversion ::= [1-9] [0-9]* | '0.' [1-9] [0-9]* | '0.0.' [1-9] [0-9]*
  for (int I = 0; I < 3; I++) {
    if (V[0] >= '1' && V[0] <= '9') {
      size_t End = parseNumeric(V);
      return End == V.size();
    }
    if (!tryRead("0."sv, V) || V.empty())
      return false;
  }

  return false;
}

// Validates a dot-separated pre-release or build identifier segment.
// Each identifier is [0-9A-Za-z-]+.