public IGrammar ToGrammar()
{
if (StartSymbolExists())
{
if (ProductionsAreEmpty())
{
PopulateMissingProductionsFromStart(Start);
}
AssertStartProductionExistsForStartSymbol(_reachibilityMatrix);
}
else
{
Start = _reachibilityMatrix.GetStartProduction();
}
var productions = GetProductionsFromProductionsModel();
var ignoreRules = GetIgnoreRulesFromIgnoreRulesModel();
return(new Grammar(Start.LeftHandSide.NonTerminal, productions, ignoreRules));
}
private void SetStartProduction()
{
if (StartSymbolExists())
{
if (ProductionsAreEmpty())
{
PopulateMissingProductionsFromStart(Start);
}
AssertStartProductionExistsForStartSymbol(_reachibilityMatrix);
}
else if (StartSettingExists())
{
if (ProductionsAreEmpty())
{
throw new InvalidOperationException("Unable to determine start symbol. No productions exist and a start symbol was not specified.");
}
AssertStartProductionexistsForStartSetting(_reachibilityMatrix);
Start = FindProduction(StartSetting.Value);
}
else
{
Start = _reachibilityMatrix.GetStartProduction();
}
}