unknown operator "activate in environment"

RouterOS Scripting
1

A coworker of mine was poking around in the terminal and noticed that one of the available operators inside of parentheses for a put or if statement is the following <%% activate in environment

however it doesn’t seem to be doing anything with different types of data given to it.
does anyone use this operator or know what it would be used for? I can’t find anything about this in the docs.
MicrosoftTeams-image.png

2

???
[test@test] > :put [:parse “:local test (0 <%% 1)”]
(eval /localname=$test;value=(<%% 0 1))

[test@test] > :put [:parse “:local test (0 < 1 % 2 % 3)”]
(eval /localname=$test;value=(< 0 (% (% 1 2) 3)))