private StateCollection CreateParserStates(CGTContent content)
{
rules = CreateRules(content);
StateCollection states = new StateCollection();
foreach (LALRStateRecord record in content.LALRStateTable)
{
State state = new State(record.Index);
states.Add(state);
}
foreach (LALRStateRecord record in content.LALRStateTable)
{
State state = states[record.Index];
foreach (ActionSubRecord subRecord in record.ActionSubRecords)
{
Action action =
ActionFactory.CreateAction(subRecord,
states,
symbols,
rules);
state.Actions.Add(action);
}
}
return states;
}
private void Reset()
{
stream = null;
structure = null;
content = null;
dfaStates = null;
parserStates = null;
symbols = null;
rules = null;
}
private RuleCollection CreateRules(CGTContent content)
{
RuleCollection rules = new RuleCollection();
foreach (RuleRecord ruleRecord in content.RuleTable)
{
SymbolNonterminal lhs = symbols[ruleRecord.Nonterminal] as SymbolNonterminal;
//todo: exception handling?
Symbol[] rhs = new Symbol[ruleRecord.Symbols.Count];
for (int i = 0; i< rhs.Length; i++)
{
rhs[i] = symbols[ruleRecord.Symbols[i]];
}
Rule rule = new Rule(ruleRecord.Index,lhs,rhs);
rules.Add(rule);
}
return rules;
}