🟧AddType

Function for registering a custom data type in gpm.

gpm.AddType( string typeName, function func ) -> number

In the package runtime, type & TypeID is replaced by gpm.type & gpm.TypeID so there is no need to replace it manually.

Repeated execution of a function with the same type name will replace the previous function, but the unique type id will be preserved.

Example Usage

local meta = {}

function CreateExampleObject()
    local userdata = newproxy()
    debug.setmetatable( userdata, meta )
    return userdata
end

function IsExampleObject( any )
    return debug.getmetatable( any ) == meta
end

local id = gpm.AddType( "ExampleObject", IsExampleObject )

local obj = CreateExampleObject()

print( "result:", obj, IsExampleObject( obj ), gpm.type( obj ), gpm.TypeID( obj ) == id, id )
-- result:	userdata: 0xf7ffd962	true	ExampleObject    true    7