How to Generate an Array Initializer from Tuple or Variadic Template Parameters for Static Memory Layout Description?

Creating an Array Initializer from a Tuple or Variadic Template Parameters

The need arises to statically embed a description of a persistent memory layout in embedded code. This description should be constructed from variadic template parameters, with offsets calculated automatically at compile time.

To achieve this, one approach involves representing data item descriptors through a class. However, manually calculating offsets is prone to errors.

An alternative solution utilizing variadic templates offers an elegant method for generating an array initializer while simultaneously calculating offsets. A base class structure provides a framework to store data-aware information, including key, offset, and size.

Within this structure, additional template specializations handle identifier-specific details and type information. By recursively appending ProcessedEntry elements to a tuple and using a prepend construct, a tuple describing the data layout can be generated at compile time.

This tuple can then be further processed to create a std::array if desired. Alternatively, a more sophisticated accessor class could be employed to enable data retrieval and casting based on key values.

The above is the detailed content of How to Generate an Array Initializer from Tuple or Variadic Template Parameters for Static Memory Layout Description?. For more information, please follow other related articles on the PHP Chinese website!