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33 lines
No EOL
1 KiB
Lua
33 lines
No EOL
1 KiB
Lua
--- Components
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-- Container for registered ComponentClasss
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local PATH = (...):gsub('%.[^%.]+$', '')
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local Type = require(PATH..".type")
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local Components = {}
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--- Registers a ComponentClass.
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-- @param name Name to register under
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-- @param componentClass ComponentClass to register
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function Components.register(name, componentClass)
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if (type(name) ~= "string") then
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error("bad argument #1 to 'Components.register' (string expected, got "..type(name)..")", 3)
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end
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if (not Type.isComponentClass(componentClass)) then
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error("bad argument #2 to 'Components.register' (ComponentClass expected, got "..type(componentClass)..")", 3)
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end
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if (rawget(Components, name)) then
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error("bad argument #2 to 'Components.register' (ComponentClass with name '"..name.."' was already registerd)", 3)
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end
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Components[name] = componentClass
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end
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return setmetatable(Components, {
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__index = function(_, name)
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error("Attempt to index ComponentClass '"..tostring(name).."' that does not exist / was not registered", 2)
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end
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}) |