Deduce the template parameter KEY from the value_type of the initializer_list supplied to the constructor of unordered_set. Deduce the template parameters HASH and EQUAL from the other parameters passed to the constructor. This deduction guide does not participate unless the supplied allocator is convertible to bsl::allocator<KEY>.
Declared in <bslstl_unorderedset.h>
template<
class KEY,
class HASH,
class EQUAL,
class ALLOC,
class DEFAULT_ALLOCATOR = bsl::allocator<KEY>>
requires bsl::is_convertible_v<ALLOC *, DEFAULT_ALLOCATOR>
unordered_set<KEY, HASH, EQUAL>(
std::initializer_list<KEY>,
bsl::allocator_traits<DEFAULT_ALLOCATOR>::size_type,
HASH,
EQUAL,
ALLOC*) -> unordered_set<KEY, HASH, EQUAL>;