Function parse

tools/re2c/src/parse/parser.cc:2189–2380

{

void parse(Scanner& i, Output & o)
{
	std::map<std::string, smart_ptr<DFA> >  dfa_map;
	ScannerState rules_state;

	in = &i;

	o.source.wversion_time ()
		.wline_info (in->get_cline (), in->get_fname ().c_str ());
	if (opts->target == opt_t::SKELETON)
	{
		Skeleton::emit_prolog (o.source);
	}

	Enc encodingOld = opts->encoding;
	
	while ((parseMode = i.echo()) != Scanner::Stop)
	{
		o.source.new_block ();
		bool bPrologBrace = false;
		ScannerState curr_state;

		i.save_state(curr_state);
		foundRules = false;

		if (opts->rFlag && parseMode == Scanner::Rules && dfa_map.size())
		{
			in->fatal("cannot have a second 'rules:re2c' block");
		}
		if (parseMode == Scanner::Reuse)
		{
			if (dfa_map.empty())
			{
				in->fatal("got 'use:re2c' without 'rules:re2c'");
			}
		}
		else if (parseMode == Scanner::Rules)
		{
			i.save_state(rules_state);
		}
		else
		{
			dfa_map.clear();
		}
		rank_counter.reset ();
		spec.clear ();
		in->set_in_parse(true);
		yyparse();
		in->set_in_parse(false);
		if (opts->rFlag && parseMode == Scanner::Reuse)
		{
			if (foundRules || opts->encoding != encodingOld)
			{
				// Re-parse rules
				parseMode = Scanner::Parse;
				i.restore_state(rules_state);
				i.reuse();
				dfa_map.clear();