Manuel Simon Hirsig
58 lines
1.9 KiB
Lua
58 lines
1.9 KiB
Lua
local PUBLIC, PRIVATE = 1, 2
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local state = {}
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local function_mt = {
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__call = function(self, ...)
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local f = state[self]
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local temp = getfenv(f).__
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getfenv(f).__ = {}
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f(unpack(arg))
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getfenv(f).__ = temp
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end,
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}
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local interface_mt = {
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__index = function(self, key)
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if not state[self].access[state[self].type][key] then
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error('Read of undeclared "'..key..'".', 2)
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end
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return state[self].data[key]
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end,
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__newindex = function(self, key, value)
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if type(value) == 'string' then
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aux.log('kek', debugstack(1, 0, 5))
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end
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if state[self].type == PUBLIC then
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error('Unsupported operation.', 2)
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elseif not state[self].access[PRIVATE][key] then
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error('Write of undeclared "'..key..'".', 2)
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end
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state[self].data[key] = value
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end,
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}
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local declarator_mt = {
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__index = function()
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error('Unsupported operation.', 2)
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end,
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__newindex = function(self, key, value)
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if state[self].access[PRIVATE][key] then
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error('Multiple declarations of "'..key..'".', 2)
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end
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state[self].data[key] = value
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state[self].access[PRIVATE][key] = true
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state[self].access[state[self].type][key] = true
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end,
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}
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function aux_module()
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local data, access = {}, {{}, {__=true}}
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local public_state, private_state = {type=PUBLIC, data=data, access=access}, {type=PRIVATE, data=data, access=access}
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local interface, private_interface = setmetatable({}, interface_mt), setmetatable({}, interface_mt)
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local public_declarator, private_declarator = setmetatable({}, declarator_mt), setmetatable({}, declarator_mt)
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state[interface], state[private_interface] = public_state, private_state
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state[public_declarator], state[private_declarator] = public_state, private_state
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local env = setmetatable({m=private_interface, public=public_declarator, private=private_declarator}, {__index=getfenv(0)})
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-- public_state.env = env
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-- private_state.env = env
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setfenv(2, env)
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return interface
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end |