62 lines
2.3 KiB
Text
62 lines
2.3 KiB
Text
--!strict
|
|
--!optimize 2
|
|
--[[
|
|
original author by @memorycode
|
|
|
|
MIT License
|
|
|
|
Copyright (c) 2024 Michael
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in all
|
|
copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
--]]
|
|
|
|
--- What signals passed to `collect()` should be able to be coerced into
|
|
export type SignalLike<D, T...> = { connect: Connector<D, T...>, [any]: any } | { Connect: Connector<D, T...>, [any]: any }
|
|
type Connector<D, T...> = (self: SignalLike<D, T...>, (T...) -> ()) -> D
|
|
|
|
--- Collects all arguments fired through the given signal, and drains the collection on iteration.\
|
|
--- Expects signals to have a `Connect` or `connect` ***method***.
|
|
local function collect<D, T...>(event: SignalLike<D, T...>): (() -> (number, T...), D)
|
|
local storage = {}
|
|
local mt = {}
|
|
local iter = function()
|
|
local n = #storage
|
|
return function(): (number?, T...)
|
|
if n <= 0 then
|
|
mt.__iter = nil
|
|
return nil :: any
|
|
end
|
|
|
|
n -= 1
|
|
return n + 1, unpack(table.remove(storage, 1) :: any) :: any
|
|
end
|
|
end
|
|
|
|
local connect = event.Connect or event.connect
|
|
assert(connect ~= nil, "Signal is missing a Connect function - is it really a signal?")
|
|
local disconnect = connect(event, function(...)
|
|
table.insert(storage, { ... })
|
|
mt.__iter = iter :: any
|
|
end)
|
|
|
|
setmetatable(storage, mt)
|
|
return storage :: any, disconnect
|
|
end
|
|
|
|
return collect
|