private static bool CheckField( Core.Session session, int structIndex, int fieldIndex, Core.Type innerType, Stack <int> seenStructs) { var fieldStruct = innerType as Core.TypeStruct; if (fieldStruct == null) { return(false); } var st = session.GetStruct(structIndex); Core.Name fieldName; st.fieldNames.FindByValue(fieldIndex, out fieldName); session.PushContext( "in struct '" + session.GetStructName(structIndex).GetString() + "', " + "field '" + fieldName.GetString() + "'", st.GetFieldNameSpan(fieldIndex)); var err = false; if (seenStructs.Contains(fieldStruct.structIndex)) { err = true; session.AddMessage( Diagnostics.MessageKind.Error, Diagnostics.MessageCode.StructRecursion, "struct recursion", session.GetStruct(fieldStruct.structIndex).GetNameSpan(), st.GetFieldNameSpan(fieldIndex)); } if (!err) { CheckStruct(session, fieldStruct.structIndex, seenStructs); } session.PopContext(); return(err); }