internal static IProductionRule Expand(this IProductionRule rule, IOilexerGrammarProductionRuleEntry currentEntry, IList <IOilexerGrammarTokenEntry> availableStock, ProductionRuleTemplateArgumentSeries argumentLookup, IOilexerGrammarProductionRuleTemplateEntry entry, OilexerGrammarFile file, ICompilerErrorCollection errors)
{
if (rule.HasExpansion())
{
List <IProductionRuleItem> result = new List <IProductionRuleItem>();
foreach (IProductionRuleItem item in rule)
{
IProductionRuleItem ipri = null;
if (item.HasExpansion())
{
ipri = item.Expand(currentEntry, availableStock, argumentLookup, entry, file, errors);
}
else
{
ipri = item.Clone();
}
if (ipri == null)
{
continue;
}
result.Add(ipri);
}
rebuildResult:
List <IProductionRuleItem> rebuiltResult = new List <IProductionRuleItem>();
foreach (IProductionRuleItem ipri in result)
{
if (ipri is IProductionRuleGroupItem && ((IProductionRuleGroupItem)(ipri)).Count == 1 && (ipri.Name == null || ipri.Name == string.Empty) && ipri.RepeatOptions == ScannableEntryItemRepeatInfo.None)
{
foreach (IProductionRuleItem iprii in ((IProductionRuleGroupItem)(ipri))[0])
{
rebuiltResult.Add(iprii);
}
}
else
{
rebuiltResult.Add(ipri);
}
}
if (rebuiltResult.Count != result.Count)
{
result = rebuiltResult;
goto rebuildResult;
}
if (result.Count == 0)
{
return(null);
}
return(new ProductionRule(result, rule.FileName, rule.Column, rule.Line, rule.Position));
}
else
{
return(rule);
}
}
