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Allow for blank components

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This commit is contained in:
Tjakka5 2019-12-22 23:17:16 +01:00
parent 144a42dc9e
commit a8bc92a951
2 changed files with 7 additions and 6 deletions
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6
main.lua
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@ -29,9 +29,7 @@ end)
Components.register("test_comp_2", test_comp_2) Components.register("test_comp_2", test_comp_2)
local test_comp_3 = Component(function(e, b) local test_comp_3 = Component()
e.b = b
end)
Components.register("test_comp_3", test_comp_3) Components.register("test_comp_3", test_comp_3)
@ -72,7 +70,7 @@ entity
:give(Components.test_comp_1, 100, 100) :give(Components.test_comp_1, 100, 100)
:remove(Components.test_comp_1) :remove(Components.test_comp_1)
:give(Components.test_comp_1, 200, 100) :give(Components.test_comp_1, 200, 100)
:give(Components.test_comp_3, 200, 100)
Worlds.testWorld:addEntity(entity) Worlds.testWorld:addEntity(entity)

7
src/component.lua
View file

@ -7,8 +7,8 @@ Component.__index = Component
-- @param populate A function that populates the Bag with values -- @param populate A function that populates the Bag with values
-- @return A Component object -- @return A Component object
function Component.new(populate) function Component.new(populate)
if not (type(populate) == "function") then if (type(populate) ~= "function" and type(populate) ~= "nil") then
error("bad argument #1 to 'Component.new' (function expected, got "..type(populate)..")", 2) error("bad argument #1 to 'Component.new' (function/nil expected, got "..type(populate)..")", 2)
end end
local baseComponent = setmetatable({ local baseComponent = setmetatable({
@ -22,6 +22,9 @@ function Component.new(populate)
return baseComponent return baseComponent
end end
function Component:__populate() -- luacheck: ignore
end
--- Creates and initializes a new Component. --- Creates and initializes a new Component.
-- @param ... The values passed to the populate function -- @param ... The values passed to the populate function
-- @return A new initialized Component -- @return A new initialized Component