colwise_optional_broadcast()

template<typename T , typename = require_all_kernel_expressions_and_none_scalar_t<T>>

auto stan::math::colwise_optional_broadcast ( T &&  a )

inline

Broadcast an expression in colwise dimmension if the number of rows equals to 1.

In that case further expressions can use this expression as if had any number of rows, repeating the values.

Broadcasting evaluates argument expression multiple times. For performance reasons don't broadcast slow operations. Instead evaluate them in a separate kernel.

Template Parameters

T	type of input expression

Parameters

a	input expression

Returns

broadcast expression

Definition at line 241 of file optional_broadcast.hpp.