bool MatchPattern(const std::wstring& source, const std::wstring& pattern) {
  assert(pattern.find(L"**") == std::wstring::npos);
  return MatchPatternImpl(source, pattern, 0, 0);
}

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.