empty-assignment

Flag an assignment whose value is an empty block (x <- {}). An empty block evaluates to NULL, so this is a roundabout x <- NULL—usually a leftover from deleting the block’s body. An empty function body or if branch is not flagged.

This rule is enabled by default.

Assigning an empty block is the same as assigning NULL:

x <- {}

warning: empty-assignment
 --> example.R:1:6
  |
1 | x <- {}
  |      ^^ assigning an empty block `{}` is the same as assigning `NULL`
  = help: Assign `NULL` or a meaningful value instead.