CLI API: specify names for an input DATASET_LIST of objects (e.g., raster calc)?

Hi,
"raster calc" takes DATASET_LIST input that may be objects in API
usage. Calc inputs must be named when more than one is provided. The
syntax '[<name>=]<input>' is used for datasets given as text DSNs or
nested pipeline statements. I can't tell whether it's possible to
specify a list of names when the DATASET_LIST is given as a vector of
`GDALDatasetH*` in API usage.

Thanks.

Chris