valid: function ()
时间: 2024-01-06 15:05:17 浏览: 21
As an AI language model, I don't have enough context to determine the purpose or specifics of the function, but in general, "valid" could be the name of a function that checks the validity of something, such as user input, a password, or an email address. The parentheses after the function name indicate that it takes no arguments. The curly braces that follow would contain the code that defines the function's behavior.
相关问题
[00:00:50]: [string "scripts/prefabs/weed_plants.lua"]:116: bad argument #1 to 'random' (interval is empty) LUA ERROR stack traceback: =[C]:-1 in (field) random (C) <-1--1> scripts/prefabs/weed_plants.lua:116 in (upvalue) PlayStageAnim (Lua) <113-124> inst = 120066 - weed_ivy (valid:false) anim = picked custom_pre = nil scripts/prefabs/weed_plants.lua:203 in (field) fn (Lua) <192-207> inst = 120066 - weed_ivy (valid:false) stage = 1 stage_data = table: 000000003A02CC30 scripts/components/growable.lua:179 in (method) SetStage (Lua) <171-181> self = OnLoad = function - ../mods/workshop-2484725102/scripts/upgrade_component.lua:151 growoffscreen = true StartGrowing = function - ../mods/workshop-1645013096/modmain.lua:1 usetimemultiplier = false pausereasons = table: 00000000A3834B40 magicgrowable = true stages = table: 000000003A02DE00 inst = 120066 - weed_ivy (valid:false) stage = 1 domagicgrowthfn = function - scripts/prefabs/weed_plants.lua:357 stage = 1
这是一段Lua错误信息的堆栈跟踪,说明在执行Lua脚本时发生了错误。根据堆栈跟踪信息可以看出,错误发生在“scripts/prefabs/weed_plants.lua”的第116行,具体错误信息是“bad argument #1 to 'random' (interval is empty)”。
这个错误提示意味着在调用random函数时,传入的参数不正确,导致随机区间为空。可能是在计算随机区间时出现了错误,或者是随机区间参数传递不正确导致的。需要检查代码,确认参数传递是否正确,以及随机区间的计算是否正确。可以在代码中添加一些调试信息,以便更好地定位问题所在。
std::future valid()
The std::future valid() function is used to check if a std::future object is valid, i.e., if it is associated with any shared state. The function returns true if the std::future object is valid and false otherwise.
Here's an example:
```
#include <iostream>
#include <future>
int main() {
std::future<int> fut;
std::cout << "Is future valid? " << fut.valid() << std::endl;
fut = std::async(std::launch::async, [](){ return 42; });
std::cout << "Is future valid? " << fut.valid() << std::endl;
int result = fut.get();
std::cout << "Result: " << result << std::endl;
std::cout << "Is future valid? " << fut.valid() << std::endl;
return 0;
}
```
Output:
```
Is future valid? 0
Is future valid? 1
Result: 42
Is future valid? 0
```
In this example, we create a std::future object `fut` and check if it is valid using the `valid()` function, which returns false as `fut` is not associated with any shared state.
Next, we create a task using `std::async()` and assign the returned future object to `fut`. We then check if `fut` is valid using the `valid()` function, which returns true as `fut` is now associated with a shared state.
We then call `fut.get()` to retrieve the result of the task and store it in `result`. After that, we check if `fut` is still valid using the `valid()` function, which now returns false as the shared state has been consumed.
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