Deduce the template parameter VALUE from the value_type of the initializer_list supplied to the constructor of vector. This deduction guide does not participate unless the supplied allocator is convertible to bsl::allocator<VALUE>.
Declared in <bslstl_vector.h>
template<
class VALUE,
class ALLOC,
class DEFAULT_ALLOCATOR = bsl::allocator<VALUE>>
requires bsl::is_convertible_v<ALLOC *, DEFAULT_ALLOCATOR>
vector<VALUE>(
std::initializer_list<VALUE>,
ALLOC*) -> vector<VALUE>;