Deduce the specified types T1 and T2 from the corresponding template parameters of the std::pair supplied to the constructor of pair. This guide does not participate in deduction unless the specified ALLOC inherits from bslma::Allocator.
Declared in <bslstl_pair.h>
template<
class T1,
class T2,
class ALLOC>
requires bsl::is_convertible_v<ALLOC *, BloombergLP::bslma::Allocator *>
pair<T1, T2>(
std::pair<T1, T2>,
ALLOC*) -> pair<T1, T2>;