循环遍历C ++中的所有Lua全局变量 [英] Loop through all Lua global variables in C++
问题描述
我一直在寻找相当长的一段时间,我还没有找到一种方法从C ++中获取所有全局变量。考虑这个小的Lua测试脚本。
myGlobal1 =Global 1
myGlobal2 = 2
函数test()
local l1 = 0
print(myGlobal1,myGlobal2,l1)
end
test()
$ c假设你暂停执行 print(myGlobal1,myGlobal2,l1)
和从 C ++获取所有全局变量( myGlobal1
和 myGlobal2
)。这些例子是任意的,从C ++的角度来看,全局变量是未知的。
我一直在寻找 lua_getglobal() code>但我需要首先知道变量的名称。我查看了 lua_getupvalue()
,但只得到了 _ENV
作为结果。
我想尽快知道它们的名字,我可以使用 lua_getglobal()
,但是如何获得全局变量列表(来自C ++) ?在这一点上我确实有 lua_Debug
结构(如果有任何帮助的话)
编辑
这篇文章最初并不是关于如何查找用户自己的全局变量,而是关于如何查找用户自己的全局变量。
然而,我发布了一个解决方案如何完成这项工作此处 a>。
解决方案好的,我解决了它。
lua_pushglobaltable(L); //获取全局表
lua_pushnil(L); //(lua_next(L,-2)!= 0){// key(-1)被表(-2)中的下一个键(-1)替换时,在栈
上放置一个零键
name = lua_tostring(L,-2); //获取密钥(-2)名称
lua_pop(L,1); //取值(-1),现在在(-1)
}处
lua_pop(L,1); //删除全局表(-1)
当 lua_next() code>找不到更多的条目,键名弹出,离开表(-1)。
接下来的问题是区分我自己的全局变量从表格条目的其余部分... ...
I have been searching for quite a while now and I haven't found a way to fetch all the global variables from C++. Consider this small Lua test script.
myGlobal1 = "Global 1"
myGlobal2 = 2
function test()
local l1=0
print (myGlobal1,myGlobal2,l1)
end
test()
Assume you pause the execution at print (myGlobal1,myGlobal2,l1)
and from C++ get all the global variables (myGlobal1
and myGlobal2
). These examples are arbitrary, the global variables, from a C++ point of view, are unknown.
I have been looking at lua_getglobal()
but then I need to know the name of the variable first. I looked at lua_getupvalue()
but only got "_ENV
" as result.
I guess I can use lua_getglobal()
as soon I know the name of them, but how do I get the list of global variables (from C++)? I do have the lua_Debug
structure at this point (if it is to any help)
EDIT
This post wasn't originally about iterating through a table, it was about how to find the user's own globals.
However, I posted a solution to how this can be done here.
解决方案 Okay I solved it.
lua_pushglobaltable(L); // Get global table
lua_pushnil(L); // put a nil key on stack
while (lua_next(L,-2) != 0) { // key(-1) is replaced by the next key(-1) in table(-2)
name = lua_tostring(L,-2); // Get key(-2) name
lua_pop(L,1); // remove value(-1), now key on top at(-1)
}
lua_pop(L,1); // remove global table(-1)
When lua_next()
can't find more entries the key name is popped leaving the table on top(-1).
Next problem would be to distinguish my own globals from the rest of the table entries...
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