Use of the association in LUA

Normal access to the network will use callbacks, and now through the process of changing the callback mode, so that asynchronous methods to use synchronous method

--Co.luayield =Coroutine.yieldco =function(Func, CB)Local Cor =Coroutine.create (func)LocalNext =Coroutine.resumeLocal hasnext; Hasnext =function(Status, Func, ...)--SuspendedIfNot status and return end --only function if type (func) = = "function" then  --CA ll function func (--[[callback]]function(...) hasnext (next (Cor, ...)) end) ElseIf CB then CB (func, ...) End End Hasnext (next cor)end            

--Test.luaRequire"CO")--Network asynchronous operationfunctionrequest(URL) return function(next) ... Next ("network return result") endEnd--runs a co-process method (function() Local result = Yield (Request (  "Http://login.9173.com")) local Result_json = Json.decode (Result) if Result_json.ok then – other Code EndEnd)               



Two functions are used here altogethercoAndyield

coTakes a function as a parameter, and the function is executed by the coroutine co-process.

yieldTo receive a function as a parameter, the passed-in function will have a parameter of the next function type, and the return value is next the value passed in by the function, i.e.

local result = yield(function(next)    next("success") -- 调用next()表示该函数运行结束，如果没有返回值直接next()即可end)-- result: success

Use of the association in LUA