Function FormatRegexSyntaxError

tests/gtest/gtest-all.cc:10520–10523

Helper function used by ValidateRegex() to format error messages.

// Helper function used by ValidateRegex() to format error messages.
static std::string FormatRegexSyntaxError(const char* regex, int index) {
  return (Message() << "Syntax error at index " << index
          << " in simple regular expression \"" << regex << "\": ").GetString();
}

// Generates non-fatal failures and returns false if regex is invalid;
// otherwise returns true.