Type-erased iteration of result sets

[trueqbit]

Type-erased iteration of result sets

Like originally asked in an inline question [answer] it can be desirable to pass a lazily generated query result across library boundaries. This library boundary should be independent of template arguments only used for traditional C++ views and iterators.

With C++23 we can make use of a coroutine-based generator for ranges.

Additionally to the iterate() method sqlite_orm's "storage" class now comes with a yield() method that returns a std::generator<result>.

I have chosen yield for the method name to create the range generator, as I didn't like generate, and yield says what it does.
Another good name for the new method could be query.

We have to agree on a name for the new "storage" method:
yield
query
generate
produce

[fnc12]

yield is a really good name @trueqbit . Thanks