list-of-attributes: 'list_of' attributes

In vctrs: Vector Helpers

list_of attributes

Description

• list_of_ptype() returns the ptype required by the list_of. If no ptype is required, then NULL is returned.

• list_of_size() returns the size required by the list_of. If no size is required, then NULL is returned.

Usage

list_of_ptype(x)

list_of_size(x)

Arguments

x	A list_of.

Examples

x <- list_of(1, 2)
list_of_ptype(x)
list_of_size(x)

x <- list_of(.ptype = integer(), .size = 5)
list_of_ptype(x)
list_of_size(x)

vctrs documentation built on Jan. 16, 2026, 5:16 p.m.