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Hi, after I search of 'async await' in issues, with #514 #295 #52
I know how to do a callback when lua invoke a async C# method with ContinueWith.
But, it is really a 'fire and forgot' invocation. The call stack will not back to the top caller.
How can I do a real one await when invoking DoString() ?
Here is codes reproduce it:
public async Task<(string?, string?)> CreateNextProjectTaskAsync(ProjectTask upstream, string nextTaskType)
{
await Task.Delay(1000);
return (upstream.TaskName, nextTaskType);
}
public void CreateNextTask(ProjectTask upstream, string nextTaskType, LuaFunction? callback = null)
{
CreateNextProjectTaskAsync(upstream, nextTaskType).ContinueWith(t =>
{
var res = t.Result;
callback?.Call(res.Item1, res.Item2);
});
}
[Fact]
public async Task HandleTaskFinished()
{
var action =
@"
import 'System'
m:CreateNextTask(task,'Test',function(res1,res2)
print(res1)
x=res1
print(res2)
y=res1
end)
";
using var lua = new Lua();
lua.State.Encoding = Encoding.UTF8;
lua.LoadCLRPackage();
lua["m"] = this;
lua["task"] = new ProjectTask(Guid.NewGuid())
{
TaskName = "Test"
};
var actionResults = lua.DoString(action);
var x = lua["x"]; //null！！ This line run before lua callback!
//x.ShouldBe("Test");
var y = lua["y"];
//y.ShouldBe("Test");
await Task.Delay(1000);//thread switch to callback invoke
lua.State.Status.ShouldBe(KeraLua.LuaStatus.OK);
}ProjectTask could be any class with a Guid Id and string TaskName.
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