Deduce KEY and COMPARATOR from an initializer_list with an allocator pointer.
Declared in <bslstl_set.h>
template<
class KEY,
class COMPARATOR,
class ALLOC,
class DEFAULT_ALLOCATOR = bsl::allocator<KEY>>
requires bsl::is_convertible_v<ALLOC *, DEFAULT_ALLOCATOR>
set<KEY, COMPARATOR>(
std::initializer_list<KEY>,
COMPARATOR,
ALLOC*) -> set<KEY, COMPARATOR>;
This deduction guide does not participate unless the specified ALLOC is convertible to bsl::allocator<KEY>.