std::ranges::zip_transform_view<F,Views...>::zip_transform_view

zip_transform_view() = default;	(1)	(since C++23)
constexpr zip_transform_view( F fun, Views... views );	(2)	(since C++23)

1) Default constructor. Value-initializes the stored invocable object and all adapted view objects.

The default constructor is deleted if.

F does not satisfy default_initializable, or
std::is_default_constructible_v is false for at least one type in Views....

2) Move constructs the stored invocable object from fun and every adapted view object from the corresponding view in views....

f	-	invocable object used for generation of elements of `zip_transform_view`
views	-	view objects to adapt

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