stdtuplecat

stdtuplecat is a proposed C++ standard library feature that would provide a way to concatenate `std::tuple` objects. This functionality would allow for the creation of new tuples by combining the elements of existing ones. The resulting tuple would contain all the elements from the first tuple followed by all the elements from the second tuple, preserving their original order and types.

The primary motivation behind `stdtuplecat` is to enhance compile-time metaprogramming capabilities in C++. By enabling tuple concatenation at compile time, it can simplify the construction of complex types and improve the expressiveness of template code. This is particularly useful in scenarios involving type manipulation, such as in generic programming or when working with variadic templates.

The proposed implementation would likely be a template function, taking two `std::tuple` types as arguments and returning a new `std::tuple` type. The return type would be deduced based on the types of the elements in the input tuples. For example, concatenating `std::tuple<int, double>` and `std::tuple<char, bool>` would result in a `std::tuple<int, double, char, bool>`.

While not yet a part of the official C++ standard, `stdtuplecat` has been a subject of discussion and proposals within the C++ standardization committee. Its inclusion would offer a convenient and type-safe way to combine tuple structures, making C++'s template metaprogramming more powerful and accessible. Developers may find similar functionality in third-party libraries or can implement it manually using existing C++ template techniques.