get_con_amp_trial_space Subroutine

    subroutine get_con_amp_trial_space(ilut, amps)

        ! WARNING: This routines expects that the state passed in, ilut, is
        ! definitely in the trial space, and performs a stop_all if not.

        integer(n_int), intent(in) :: ilut(0:)
        HElement_t(dp), intent(out) :: amps(:)

        integer :: i, hash_val
        integer :: nI(nel)

        amps = 0.0_dp
        call decode_bit_det(nI, ilut)

        hash_val = FindWalkerHash(nI, con_space_size)
        ! Loop over all hash clashes for this hash value.
        do i = 1, con_ht(hash_val)%nclash
            if (all(ilut(0:nifd) == con_ht(hash_val)%states(0:nifd, i))) then
                amps = transfer(con_ht(hash_val)%states(IlutBits%ind_pop:, i), amps)
                return
            end if
        end do

        call stop_all("get_trial_wf_amp", "The input state is not in the trial space.")

    end subroutine get_con_amp_trial_space