list-of-attributes

list_of_ptype

list_of_size

<ul>
<li><code>list_of_ptype()</code> returns the <code>ptype</code> required by the <code>list_of</code>.
If no <code>ptype</code> is required, then <code>NULL</code> is returned.</li>
<li><code>list_of_size()</code> returns the <code>size</code> required by the <code>list_of</code>.
If no <code>size</code> is required, then <code>NULL</code> is returned.</li>
</ul>

Defines new notions of prototype and size that are used to
provide tools for consistent and well-founded type-coercion and
size-recycling, and are in turn connected to ideas of type- and
size-stability useful for analysing function interfaces.

Davis Vaughan

vctrs

Vector Helpers

Hadley Wickham

Lionel Henry

data.table team 

Posit Software, PBC 

list-of-attributes function

Arguments

list_of attributes — list-of-attributes

list-of-attributes: `list_of` attributes

Description

Usage

Arguments

Examples