使用唯一的动态变量名称（不是变量值！） [英] Using unique dynamic variable names (not variable values!)

问题描述

好的，这比其他任何东西都更合理的检查。

由于我们有一个名为lua_State的结构，现在我需要创建一个不确定的唯一lua_State的。为了确保我不使用相同的变量名两次，我需要有某种方式来获得一个唯一的变量每次我做一个新的状态。

但是，只有一种方法（我想？）创建一个新的状态，如下：

  lua_State * S = lewL_newstate（）; 
  

现在我需要一些方法来动态改变S >

例如：如果我有4个lua文件，并且我想将每个加载到自己的lua_State，我会调用：lua_State * A = lewL_newstate（）;对于第一个，lua_State * B = lewL_newstate（）;为第二，等等。请记住，lua文件的数量各不相同，因此创建固定数量的状态可能不会很好。

我该如何做？ >

说明：

.h

 code> struct lua_State 
  

.cpp

  createNewState（Lua_State * something）{
 lua_State * something = luaL_newstate（）; 
} 
  

我想过创建一个

  std :: map< int，lua_State *> luaMap; 
  

但是我还是会遇到一个问题：实际生成一个变量名对于每个int-index。

所以，我喝了太多的咖啡，并有一个明显的简单的解决方案，我想要做的，或者我应该

提前感谢。

解决方案

p>使用 std :: vector 来存储创建的状态并生成顺序标识符（即数组索引）。

  std :: vector< lua_State *>如果没有错误， stateList; 
 
 //创建一个新的Lua状态并返回ID号
 int newLuaState（）
 {
 stateList.push_back（luaL_newstate（））; 
 return stateList.size（） -  1; 
} 
 
 //通过ID号检索Lua状态
 lua_State * getLuaState（int id）
 {
 assert（0 <= id &&& stateList.size（）> id）; 
 return stateList [id]; 
} 
  

Ok so, this is more a sanity check than anything else.

Lets asume we have a struct called lua_State, now I need to create a uncertain amount of unique lua_State's. To make sure I don't use the same variable name twice I would need to have some sort of way to get an unique variable every time i make a new state.

However there is only one way (I think?) to create a new state, and that is as follows:

lua_State *S = lewL_newstate();

Now I would need some way to dynamically change that "S" to.. whatever.

For example: If I had 4 lua files, and I wanted to load each into their own lua_State, I would call: lua_State *A = lewL_newstate(); for the first, lua_State *B = lewL_newstate(); for the second, and so on. Keep in mind the number of lua files varies so creating a fixed number of states probably won't go over well.

How would I go about doing this?

clarification:

.h

struct lua_State

.cpp

createNewState(Lua_State* something){
 lua_State* something = luaL_newstate();
}

I thought about creating a

std::map<int, lua_State*> luaMap;

but then I would still have the problem of actually generating (for lack of better words) a variable name for every int-index.

So, have I been drinking too much coffee and is there a glaringly obvious simply solution to what I am trying to do, or should I just stop coding untill the crazy blows over?

Thanks in advance.

解决方案

Use a std::vector to both store the created states and generate sequential identifiers (i.e. array indices). Unless I'm missing something, then you are grossly over-complicating your requirements.

std::vector<lua_State *> stateList;

// create a new Lua state and return it's ID number
int newLuaState()
{
    stateList.push_back(luaL_newstate());
    return stateList.size() - 1;
}

// retrieve a Lua state by its ID number
lua_State * getLuaState(int id)
{
    assert(0 <= id && stateList.size() > id);
    return stateList[id];
}

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