iox-#1969 Enable implicit conversion of 'ValueType' to 'expected' wit…

…h success value

iceoryx_hoofs/vocabulary/include/iox/detail/expected.inl

@@ -108,6 +108,18 @@ inline expected<ValueType, ErrorType>::expected(expected<ValueType, ErrorType>&&
 {
 }
 
+template <typename ValueType, typename ErrorType>
+inline expected<ValueType, ErrorType>::expected(ValueType&& value) noexcept
+    : m_store(in_place_index<VALUE_INDEX>(), std::move(value))
+{
+}
+
+template <typename ValueType, typename ErrorType>
+inline expected<ValueType, ErrorType>::expected(const ValueType& value) noexcept
+    : m_store(in_place_index<VALUE_INDEX>(), value)
+{
+}
+
 template <typename ValueType, typename ErrorType>
 inline expected<ValueType, ErrorType>&
 expected<ValueType, ErrorType>::operator=(expected<ValueType, ErrorType>&& rhs) noexcept

iceoryx_hoofs/vocabulary/include/iox/expected.hpp

@@ -276,6 +276,19 @@ class IOX_NO_DISCARD expected<ValueType, ErrorType> final
     /// ValueType or ErrorType to correctly invalidate the stored object
     expected(expected&& rhs) noexcept;
 
+    /// @brief Creates an 'expected' by forwarding value to the constructor of
+    ///        'ValueType'. This 'expected' has a success value.
+    /// @param[in] value rvalue of type 'ValueType' which will be moved into the 'expected'
+    // AXIVION DISABLE STYLE AutosarC++19_03-A12.1.4 : the usage of 'ValueType' shall be transparent when used with an 'expected'
+    // NOLINTNEXTLINE(hicpp-explicit-conversions)
+    expected(ValueType&& value) noexcept;
+
+    /// @brief Creates an 'expected' by using the copy constructor of 'ValueType'.
+    /// @param[in] value lvalue of type 'ValueType' which will be copy constructed into the 'expected'
+    // AXIVION DISABLE STYLE AutosarC++19_03-A12.1.4 : the usage of 'ValueType' shall be transparent when used with an 'expected'
+    // NOLINTNEXTLINE(hicpp-explicit-conversions)
+    expected(const ValueType& value) noexcept;
+
     /// @brief calls the destructor of the success value or error value - depending on what
     ///         is stored in the expected
     ~expected() noexcept = default;