Meta hax. I tried using __lt to get `#include<` but working but you can't compare table/userdata with strings. This is good enough.

DoNotUseThis.lua

local _ = function() end
local include=setmetatable({},{__call=function(b,c)local d=newproxy(true)local e=getmetatable(d)e.__len=function()print('You included:',c)end return d end})

_(
	#include 'stdio.h',
	#include 'test'
)
--> You included: stdio.h
--> You included: test