13 local t_sort = table.sort;

    13 local t_sort = table.sort;

    14 local setmetatable = setmetatable;

    14 local setmetatable = setmetatable;

    15 local next = next;

    15 local next = next;

    16 

    16 

    17 local _ENV = nil;

    17 local _ENV = nil;

    18 

    19 

    19 local function new()

    20 local function new()

    20 	-- Map event name to ordered list of handlers (lazily built): handlers[event_name] = array_of_handler_functions

    21 	-- Map event name to ordered list of handlers (lazily built): handlers[event_name] = array_of_handler_functions

    21 	local handlers = {};

    22 	local handlers = {};

    22 	-- Array of wrapper functions that wrap all events (nil if empty)

    23 	-- Array of wrapper functions that wrap all events (nil if empty)