...

examples/device_exam.cpp

@@ -14,14 +14,20 @@ int main()
 
     AdcGenericDevice<> dev("DEV#1");
 
-    std::println("add RW-attr with id='{}' (val={})", id1, i);
+    std::println("add arith RW-attr with id='{}' (val={})", id1, i);
-    dev.addAttr(
+    dev.addArithAttr(
         id1, [&i]() -> adc_result_t<int> { return i; },
         [&i](int ii) -> adc_error_t {
             i = ii;
             return AdcDeviceErrorCode::ERROR_OK;
-        },
+        });
-        std::tuple<double, int, long>{});
+    // dev.addAttr(
+    //     id1, [&i]() -> adc_result_t<int> { return i; },
+    //     [&i](int ii) -> adc_error_t {
+    //         i = ii;
+    //         return AdcDeviceErrorCode::ERROR_OK;
+    //     },
+    //     std::tuple<double, int, long>{});
 
     std::println("add RO-attr with id='{}' (val={})", id2, d);
     dev.addAttr(id2, [&d]() -> adc_result_t<double> { return d; }, nullptr);

include/adclib/adclib_device.h

@@ -283,7 +283,7 @@ public:
                                 float,
                                 double,
                                 long double>
-        arithmetic_t{};
+        arithmetic_types{};
 
     typedef DEV_ID_T device_id_t;
     typedef ATTR_ID_T attr_id_t;
@@ -326,6 +326,14 @@ public:
                     std::tuple<attr_t<VTs>...>{});
     }
 
+    // add attribute of one of arithmetic type
+    template <typename GT, typename ST>
+        requires std::is_arithmetic_v<snplib_attr_value_deduced_t<GT, ST>>
+    void addArithAttr(ATTR_ID_T id, GT&& getter, ST&& setter)
+    {
+        addAttr(std::move(id), std::forward<GT>(getter), std::forward<ST>(setter), AdcGenericDevice::arithmetic_types);
+    }
+
     adc_error_t operator()(CMD_ID_T id)
     {
         if (auto it = _commands.find(id); it != _commands.end()) {