mcc_keyvalue.h: fix for working with non-default constructible record

values, more smart 'set' operations for range values
mcc_epoch.h: add constructors
mcc_traits.h: add mcc_fixed_size_range and mcc_non_resizable_range
concepts
mcc_deserializer.h: fixes compilation issues for  mcc_fixed_size_range and
mcc_non_resizable_range ranges

tests/mcc_keyvalue_test.cpp

@@ -4,6 +4,59 @@
 
 using namespace mcc::impl;
 
+
+// example of non-default constructible class
+struct VT {
+    VT(int v) : _v(v) {}
+
+    void set(int v)
+    {
+        _v = v;
+    }
+
+    int v() const
+    {
+        return _v;
+    }
+
+protected:
+    int _v{};
+};
+
+
+template <>
+struct mcc::impl::MccSerializer<VT> : MccSerializerBase {
+    static constexpr std::string_view serializerName{"MCC-VT-SERIALIZER"};
+
+    template <mcc_serialization_params_c ParamsT = mcc_serialization_params_t>
+    error_t operator()(traits::mcc_output_char_range auto& output,
+                       VT const& value,
+                       ParamsT const& params = mcc_serialization_params_t{})
+    {
+        return MccSerializer<int>{}(output, value.v(), params);
+    }
+};
+
+template <>
+struct mcc::impl::MccDeserializer<VT> : MccDeserializerBase {
+    static constexpr std::string_view deserializerName{"MCC-VT-DESERIALIZER"};
+
+    template <mcc_serialization_params_c ParamsT = mcc_serialization_params_t>
+    error_t operator()(traits::mcc_input_char_range auto const& input,
+                       VT& value,
+                       ParamsT const& params = mcc_serialization_params_t{})
+    {
+        int v;
+        auto err = MccDeserializer<int>{}(input, v, params);
+        if (!err) {
+            value.set(v);
+        }
+
+        return err;
+    }
+};
+
+
 static auto kv_desc = std::make_tuple(
     mcc_simple_kv_record_t{"bb", MccAngle{11.5_degs}, MccAngle{11.5_degs}, mcc_serialization_params_t{}},
     mcc_simple_kv_record_t{"aaa", std::string("AAA"), std::string("AAA"), mcc_serialization_params_t{}},
@@ -12,7 +65,9 @@ static auto kv_desc = std::make_tuple(
         "ddd", MccAngle{11.5_degs}, MccAngle{11.5_degs},
         mcc_serialization_params_t{.angle_format = mcc::MccSerializedAngleFormat::MCC_SERIALIZED_FORMAT_SXGM_HOURS}},
     mcc_make_simple_kv_record("eee", 1.5),
-    mcc_make_simple_kv_record("arr", std::vector<int>{1, 2, 3, 4, 5, 6, 7}));
+    mcc_make_simple_kv_record("arr", std::vector<int>{1, 2, 3, 4, 5, 6, 7}),
+    mcc_make_simple_kv_record("vt", VT(77)),
+    mcc_make_simple_kv_record("sarr", std::array<double, 3>{1, 2, 3}));
 
 
 
@@ -88,6 +143,18 @@ int main()
         // return 1;
     }
 
+    err = kv.setValue("arr", std::array{10, 20, 30});
+    if (err) {
+        std::println("ERR = {}", err);
+        // return 1;
+    }
+
+    err = kv.setValue("sarr", std::vector{10, 20, 30, 40, 50});
+    if (err) {
+        std::println("ERR = {}", err);
+        // return 1;
+    }
+
     std::println("------------------------------------");