makes w_class use defines (#9848)

code/modules/mob/holder.dm

@@ -350,7 +350,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state_dead = "nymph_dead"
 	origin_tech = list(TECH_MAGNET = 3, TECH_BIO = 5)
 	slot_flags = SLOT_HEAD | SLOT_EARS | SLOT_HOLSTER
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 
 /obj/item/holder/drone
 	name = "maintenance drone"
@@ -359,14 +359,14 @@ var/list/holder_mob_icon_cache = list()
 	item_state = "drone"
 	origin_tech = list(TECH_MAGNET = 3, TECH_ENGINEERING = 5)
 	slot_flags = SLOT_HEAD
-	w_class = 4
+	w_class = ITEMSIZE_LARGE
 
 /obj/item/holder/drone/heavy
 	name = "construction drone"
 	desc = "It's a really big maintenance robot."
 	icon_state = "constructiondrone"
 	item_state = "constructiondrone"
-	w_class = 6//You're not fitting this thing in a backpack
+	w_class = ITEMSIZE_IMMENSE //You're not fitting this thing in a backpack
 
 /obj/item/holder/drone/mining
 	name = "mining drone"
@@ -385,7 +385,7 @@ var/list/holder_mob_icon_cache = list()
 //Setting item state to cat saves on some duplication for the in-hand versions, but we cant use it for head.
 //Instead, the head versions are done by duplicating the cat
 	slot_flags = SLOT_HEAD
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 
 /obj/item/holder/cat/black
 	icon_state = "cat"
@@ -403,7 +403,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state = "kitten"
 	icon_state_dead = "cat_kitten_dead"
 	slot_flags = SLOT_HEAD
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 	item_state = "kitten"
 
 /obj/item/holder/cat/penny
@@ -412,7 +412,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state = "penny"
 	icon_state_dead = "penny_dead"
 	slot_flags = SLOT_HEAD
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 	item_state = "penny"
 
 /obj/item/holder/carp/baby
@@ -423,7 +423,7 @@ var/list/holder_mob_icon_cache = list()
 	item_state = "babycarp"
 	slot_flags = SLOT_HEAD
 	flags_inv = HIDEEARS
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 
 /obj/item/holder/carp/baby/verb/toggle_block_hair()
 	set name = "Toggle Hair Coverage"
@@ -437,7 +437,7 @@ var/list/holder_mob_icon_cache = list()
 	desc = "It's a slimy brain slug. Gross."
 	icon_state = "brainslug"
 	origin_tech = list(TECH_BIO = 6)
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 
 /obj/item/holder/monkey
 	name = "monkey"
@@ -445,7 +445,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state = "monkey"
 	item_state = "monkey"
 	slot_flags = SLOT_HEAD
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 
 /obj/item/holder/monkey/farwa
 	name = "farwa"
@@ -453,7 +453,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state = "farwa"
 	item_state = "farwa"
 	slot_flags = SLOT_HEAD
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 
 /obj/item/holder/monkey/stok
 	name = "stok"
@@ -461,7 +461,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state = "stok"
 	item_state = "stok"
 	slot_flags = SLOT_HEAD
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 
 /obj/item/holder/monkey/neaera
 	name = "neaera"
@@ -469,7 +469,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state = "neaera"
 	item_state = "neaera"
 	slot_flags = SLOT_HEAD
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 
 //Holders for rats
 /obj/item/holder/rat
@@ -482,7 +482,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state_dead = "rat_brown_dead"
 	slot_flags = SLOT_EARS
 	origin_tech = list(TECH_BIO = 2)
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 
 /obj/item/holder/rat/white
 	icon_state = "rat_white_sleep"
@@ -519,7 +519,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state = "lizard"
 
 	slot_flags = 0
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 
 //Chicks and chickens
 /obj/item/holder/chick
@@ -530,7 +530,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state_dead = "chick_dead"
 	slot_flags = 0
 	icon_state = "chick"
-	w_class = 1
+	w_class = ITEMSIZE_TINY
 
 
 /obj/item/holder/chicken
@@ -541,7 +541,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state = "chicken_brown"
 	icon_state_dead = "chicken_brown_dead"
 	slot_flags = 0
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 
 /obj/item/holder/chicken/brown
 	icon_state = "chicken_brown"
@@ -566,7 +566,7 @@ var/list/holder_mob_icon_cache = list()
 	icon_state = "mushroom"
 	icon_state_dead = "mushroom_dead"
 	slot_flags = SLOT_HEAD
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 
 
 
@@ -617,18 +617,18 @@ var/list/holder_mob_icon_cache = list()
 	icon = 'icons/mob/npc/pets.dmi'
 	icon_state = "corgi"
 	item_state = "corgi"
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 
 /obj/item/holder/fox
 	name = "fox"
 	icon = 'icons/mob/npc/pets.dmi'
 	icon_state = "fox"
 	item_state = "fox"
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 
 /obj/item/holder/schlorrgo
 	name = "schlorrgo"
 	icon = 'icons/mob/npc/livestock.dmi'
 	icon_state = "schlorgo"
 	item_state = "schlorgo"
-	w_class = ITEMSIZE_NORMAL
+	w_class = ITEMSIZE_NORMAL

code/modules/mob/living/bot/floorbot.dm

@@ -329,7 +329,7 @@
 	throwforce = 10.0
 	throw_speed = 2
 	throw_range = 5
-	w_class = 3.0
+	w_class = ITEMSIZE_NORMAL
 	var/created_name = "Floorbot"
 
 /obj/item/toolbox_tiles/attackby(var/obj/item/W, mob/user as mob)
@@ -359,7 +359,7 @@
 	throwforce = 10.0
 	throw_speed = 2
 	throw_range = 5
-	w_class = 3.0
+	w_class = ITEMSIZE_NORMAL
 	var/created_name = "Floorbot"
 
 /obj/item/toolbox_tiles_sensor/attackby(var/obj/item/W, mob/user as mob)

code/modules/mob/living/bot/medbot.dm

@@ -337,7 +337,7 @@
 	var/build_step = 0
 	var/created_name = "Medibot" //To preserve the name if it's a unique medbot I guess
 	var/skin = null //Same as medbot, set to tox or ointment for the respective kits.
-	w_class = 3.0
+	w_class = ITEMSIZE_NORMAL
 
 /obj/item/firstaid_arm_assembly/Initialize()
 	. = ..()

code/modules/mob/living/carbon/brain/MMI.dm

@@ -20,7 +20,7 @@
 	desc = "The Warrior's bland acronym, MMI, obscures the true horror of this monstrosity."
 	icon = 'icons/obj/assemblies.dmi'
 	icon_state = "mmi_empty"
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 	origin_tech = list(TECH_BIO = 3)
 
 	req_access = list(access_robotics)

code/modules/mob/living/carbon/brain/robot.dm

@@ -3,7 +3,7 @@
 	desc = "The pinnacle of artifical intelligence which can be achieved using classical computer science."
 	icon = 'icons/obj/module.dmi'
 	icon_state = "mainboard"
-	w_class = 3
+	w_class = ITEMSIZE_NORMAL
 	origin_tech = list(TECH_ENGINEERING = 4, TECH_MATERIAL = 3, TECH_DATA = 4)
 
 /obj/item/device/mmi/digital/robot/New()
@@ -20,4 +20,4 @@
 	return
 
 /obj/item/device/mmi/digital/robot/attack_self(mob/user as mob)
-	return
+	return

code/modules/mob/living/carbon/slime/items.dm

@@ -4,7 +4,7 @@
 	icon = 'icons/mob/npc/slimes.dmi'
 	icon_state = "grey slime extract"
 	force = 1.0
-	w_class = 1.0
+	w_class = ITEMSIZE_TINY
 	throwforce = 0
 	throw_speed = 3
 	throw_range = 6
@@ -282,4 +282,4 @@
 	wizardy = TRUE
 
 /mob/living/carbon/slime/has_eyes()
-	return FALSE
+	return FALSE

code/modules/mob/living/silicon/robot/robot_modules.dm

@@ -15,7 +15,7 @@ var/global/list/robot_modules = list(
 	name = "robot module"
 	icon = 'icons/obj/module.dmi'
 	icon_state = "std_mod"
-	w_class = 100.0
+	w_class = ITEMSIZE_IMMENSE
 	item_state = "electronic"
 	flags = CONDUCT
 	var/channels = list()
@@ -1138,4 +1138,4 @@ var/global/list/robot_modules = list(
 		S.reagents.clear_reagents()
 		S.mode = initial(S.mode)
 		S.desc = initial(S.desc)
-		S.update_icon()
+		S.update_icon()

code/modules/mob/living/simple_animal/constructs/soulstone.dm

@@ -7,7 +7,7 @@
 	icon = 'icons/obj/wizard.dmi'
 	icon_state = "soulstone"
 	item_state = "electronic"
-	w_class = 2
+	w_class = ITEMSIZE_SMALL
 	slot_flags = SLOT_BELT
 	origin_tech = list(TECH_BLUESPACE = 4, TECH_MATERIAL = 4)
 	appearance_flags = NO_CLIENT_COLOR
@@ -47,7 +47,7 @@
 		dat += "<A href='byond://?src=\ref[src];choice=Summon'>Summon Shade</A><br>"
 		dat += "<i>This will summon the spirit of [A.name] in a pure energy form. Be cautious, for they will be weak without a protective construct to house them.</i><hr>"
 	dat += "<a href='byond://?src=\ref[src];choice=Close'>Close</a>"
-	
+
 	var/datum/browser/soulstone_win = new(user, "soulstone", capitalize_first_letters(name))
 	soulstone_win.set_content(dat)
 	soulstone_win.add_stylesheet("cult", 'html/browser/cult.css')

code/modules/mob/mob_grab.dm

@@ -45,7 +45,7 @@
 	layer = SCREEN_LAYER
 	abstract = 1
 	item_state = "nothing"
-	w_class = 5.0
+	w_class = ITEMSIZE_HUGE
 
 
 /obj/item/grab/New(mob/user, mob/victim)