Class MatchesRegexMatcher

tests/gtest/gtest.h:9521–9569

Implements polymorphic matchers MatchesRegex(regex) and ContainsRegex(regex), which can be used as a Matcher as long as T can be converted to a string.

// ContainsRegex(regex), which can be used as a Matcher<T> as long as
// T can be converted to a string.
class MatchesRegexMatcher {
 public:
  MatchesRegexMatcher(const RE* regex, bool full_match)
      : regex_(regex), full_match_(full_match) {}

#if GTEST_HAS_ABSL
  bool MatchAndExplain(const absl::string_view& s,
                       MatchResultListener* listener) const {
    return MatchAndExplain(std::string(s), listener);
  }
#endif  // GTEST_HAS_ABSL

  // Accepts pointer types, particularly:
  //   const char*
  //   char*
  //   const wchar_t*
  //   wchar_t*
  template <typename CharType>
  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
    return s != nullptr && MatchAndExplain(std::string(s), listener);
  }

  // Matches anything that can convert to std::string.
  //
  // This is a template, not just a plain function with const std::string&,
  // because absl::string_view has some interfering non-explicit constructors.
  template <class MatcheeStringType>
  bool MatchAndExplain(const MatcheeStringType& s,
                       MatchResultListener* /* listener */) const {
    const std::string& s2(s);
    return full_match_ ? RE::FullMatch(s2, *regex_)
                       : RE::PartialMatch(s2, *regex_);
  }

  void DescribeTo(::std::ostream* os) const {
    *os << (full_match_ ? "matches" : "contains") << " regular expression ";
    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
  }

  void DescribeNegationTo(::std::ostream* os) const {
    *os << "doesn't " << (full_match_ ? "match" : "contain")
        << " regular expression ";
    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
  }

 private:
  const std::shared_ptr<const RE> regex_;
  const bool full_match_;
};
}  // namespace internal

// Matches a string that fully matches regular expression 'regex'.