The invocations can be converted to compile time features at 2 places:

1. raft/cpp/include/raft/matrix/detail/linewise_op.cuh

   Lines 767 to 773 in cc165d9

   	if (alongLines)
   	return matrixLinewiseVecRows<Type, IdxType, VecBytes, BlockSize, Lambda, Vecs...>(
   	out, in, lineLen, nLines, op, stream, vecs...);
   	else
   	return matrixLinewiseVecCols<Type, IdxType, VecBytes, BlockSize, Lambda, Vecs...>(
   	out, in, lineLen, nLines, op, stream, vecs...);
   	}

2. raft/cpp/include/raft/matrix/detail/linewise_op.cuh

   Lines 799 to 815 in cc165d9

   	if (alongLines)
   	return matrixLinewiseVecRowsSpan<Type,
   	IdxType,
   	LayoutPolicy,
   	VecBytes,
   	BlockSize,
   	Lambda,
   	Vecs...>(out, in, lineLen, nLines, op, stream, vecs...);
   	else
   	return matrixLinewiseVecColsSpan<Type,
   	IdxType,
   	LayoutPolicy,
   	VecBytes,
   	BlockSize,
   	Lambda,
   	Vecs...>(out, in, lineLen, nLines, op, stream, vecs...);
   	}

This struct has callers in:
raft/matrix/linewise_op.cuh

1. raft/cpp/include/raft/matrix/linewise_op.cuh

   Line 85 in cc165d9

   detail::MatrixLinewiseOp<16, 256>::run<m_t, idx_t>(out.data_handle(),

2. raft/cpp/include/raft/matrix/linewise_op.cuh

   Line 120 in cc165d9

   detail::MatrixLinewiseOp<16, 256>::runPadded<m_t, idx_t>(out,

raft/matrix/matrix.cuh

1. raft/cpp/include/raft/matrix/matrix.cuh

   Line 304 in cc165d9

   detail::MatrixLinewiseOp<16, 256>::run<m_t, idx_t, Lambda, Vecs...>(

Also, the change will proliferate to several other primitives that use the above 2. For example, in raft/linalg/matrix_vector_op.cuh, there is the opportunity to convert both rowMajor and bcastAlongRows to template parameters. Once the original API changes, the results will cascade down to other caller sites as well.