1#ifndef STAN_MATH_OPENCL_PRIM_SIZE_HPP 
    2#define STAN_MATH_OPENCL_PRIM_SIZE_HPP 
   18          require_nonscalar_prim_or_rev_kernel_expression_t<T>* = 
nullptr>
 
   20  return m.rows() * m.cols();
 
int64_t size(const T &m)
Returns the size (number of the elements) of a matrix_cl or var_value<matrix_cl<T>>.
 
The lgamma implementation in stan-math is based on either the reentrant safe lgamma_r implementation ...