iframe-proxy | Sunbelt Computer Software

20 lines (18 loc) · 497 Bytes

---Make the given function a promise automatically assuming the callback

---function is the last argument

---@generic T

---@param func fun(..., callback: fun(result: T)): any

---@return fun(...): T

local function wrap(func)

assert(type(func) == 'function', 'type error :: expected func')

local factory = function(...)

local params = { ... }

local thunk = function(step)

table.insert(params, step)

return func(unpack(params))

end

return thunk

end

return factory

end

return wrap

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