to_ref() [1/2]

template<typename T , require_not_tuple_t< T > * = nullptr>

ref_type_t< T && > stan::math::to_ref ( T &&  a )

inline

This evaluates expensive Eigen expressions.

If given expression involves no calculations this is a no-op that should be optimized away.

Template Parameters

T	argument type

Parameters

a

argument

Returns

optionally evaluated argument

Definition at line 18 of file to_ref.hpp.