private static AlterationModel GetAlterationModelFromAlterationExpression(IEnumerable <BaseExpression> symbols)
{
var alterationModel = new AlterationModel();
foreach (var symbol in symbols)
{
switch (symbol)
{
case ProductionExpression productionExpression:
alterationModel.AddSymbol(productionExpression.ProductionModel);
break;
case SymbolExpression symbolExpression:
alterationModel.AddSymbol(symbolExpression.SymbolModel);
break;
case GrammarReferenceExpression grammarReferenceExpression:
alterationModel.AddSymbol(grammarReferenceExpression.GrammarReferenceModel);
break;
case RuleExpression expr:
foreach (var symbolModel in GetSymbolModelsFromExpr(expr))
{
alterationModel.AddSymbol(symbolModel);
}
break;
}
}
return(alterationModel);
}
