34 lines
941 B
Plaintext
34 lines
941 B
Plaintext
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-- This file defines Importer, which is a type of table that can import from other tables
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import_to_1_from = (host, to_import)->
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if host_mt = getmetatable(host)
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if host_mt.__import
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host_mt.__import(host, to_import)
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return
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for k,v in pairs(to_import)
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host[k] = v
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_imports = setmetatable({}, {__mode:"k"})
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Importer = setmetatable({
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__index: (key)=> _imports[@][key]
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__import: (to_import)=>
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imports = assert _imports[@]
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for k,v in pairs(to_import)
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imports[k] = v
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continue if v == to_import
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conflict = @[k]
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import_to_1_from(conflict, v) if type(conflict) == 'table'
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}, {
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__call: (t)=>
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_imports[t] = {}
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setmetatable(t, @)
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return t
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})
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_1_forked = =>
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f = Importer{}
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_imports[f] = assert _imports[@]
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import_to_1_from(f, @)
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return f
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return {:Importer, :import_to_1_from, :_1_forked}
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