new_partial: Partial type
Description
![[Experimental]](figures/lifecycle-experimental.svg?package=vctrs&version=0.4.2)
Use new_partial() when constructing a new partial type subclass;
and use is_partial() to test if a type is partial. All subclasses
need to provide a vec_ptype_finalise() method.
Usage
new_partial(..., class = character())is_partial(x)
vec_ptype_finalise(x, ...)
Arguments
- ...
Attributes of the partial type
- class
Name of subclass.
Details
As the name suggests, a partial type partially specifies a type, and
it must be combined with data to yield a full type. A useful example
of a partial type is partial_frame(), which makes it possible to
specify the type of just a few columns in a data frame. Use this constructor
if you're making your own partial type.