Method TestInstance

extern/re2/re2/testing/tester.cc:185–290

Constructs and saves all the matching engines that will be required for the given tests.

// Constructs and saves all the matching engines that
// will be required for the given tests.
TestInstance::TestInstance(const StringPiece& regexp_str, Prog::MatchKind kind,
                           Regexp::ParseFlags flags)
  : regexp_str_(regexp_str),
    kind_(kind),
    flags_(flags),
    error_(false),
    regexp_(NULL),
    num_captures_(0),
    prog_(NULL),
    rprog_(NULL),
    re_(NULL),
    re2_(NULL) {

  VLOG(1) << CEscape(regexp_str);

  // Compile regexp to prog.
  // Always required - needed for backtracking (reference implementation).
  RegexpStatus status;
  regexp_ = Regexp::Parse(regexp_str, flags, &status);
  if (regexp_ == NULL) {
    LOG(INFO) << "Cannot parse: " << CEscape(regexp_str_)
              << " mode: " << FormatMode(flags);
    error_ = true;
    return;
  }
  num_captures_ = regexp_->NumCaptures();
  prog_ = regexp_->CompileToProg(0);
  if (prog_ == NULL) {
    LOG(INFO) << "Cannot compile: " << CEscape(regexp_str_);
    error_ = true;
    return;
  }
  if (GetFlag(FLAGS_dump_prog)) {
    LOG(INFO) << "Prog for "
              << " regexp "
              << CEscape(regexp_str_)
              << " (" << FormatKind(kind_)
              << ", " << FormatMode(flags_)
              << ")\n"
              << prog_->Dump();
  }

  // Compile regexp to reversed prog.  Only needed for DFA engines.
  if (Engines() & ((1<<kEngineDFA)|(1<<kEngineDFA1))) {
    rprog_ = regexp_->CompileToReverseProg(0);
    if (rprog_ == NULL) {
      LOG(INFO) << "Cannot reverse compile: " << CEscape(regexp_str_);
      error_ = true;
      return;
    }
    if (GetFlag(FLAGS_dump_rprog))
      LOG(INFO) << rprog_->Dump();
  }

  // Create re string that will be used for RE and RE2.
  std::string re = std::string(regexp_str);
  // Accomodate flags.
  // Regexp::Latin1 will be accomodated below.