void CFParser :: parse(_ScriptReader& reader, TapeWriter& writer)
{
// if (_symbolMode)
// reader.switchDFA(dfaSymbolic);
ScriptLog log;
TokenInfo token(this, &log);
token.read(reader);
size_t readerRollback = reader.Position();
//size_t outputRollback = compiler->Position();
size_t startId = mapRuleId("start");
if (token.state != dfaEOF) {
if (!applyRule(startId, token, reader))
throw EParseError(token.column, token.row);
if (token.state != dfaEOF)
throw EParseError(token.column, token.row);
}
IdentifierTextReader logReader((ident_t)log.getBody());
CachedScriptReader scriptReader(&logReader);
_baseParser->parse(scriptReader, writer);
}
bool CFParser :: applyRule(size_t ruleId, TokenInfo& token, _ScriptReader& reader)
{
ident_t name = retrieveKey(_names.start(), ruleId, DEFAULT_STR);
size_t readerRollback = reader.Position();
size_t coderRollback = token.LogPosition();
RuleMap::Iterator it = _rules.getIt(ruleId);
while(!it.Eof()) {
CFParser::TokenInfo tokenCopy(token);
if ((*it).apply(*it, tokenCopy, reader)) {
tokenCopy.save(token);
return true;
}
// roll back
reader.seek(readerRollback);
token.trimLog(coderRollback);
it = _rules.getNextIt(ruleId, it);
}
return false;
}