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Lua API 评估变量名称而不是值
原标题:Lua API evaluates variable name instead of value
  • 时间:2012-05-22 14:22:44
  •  标签:
  • c
  • api
  • lua

我使用Lua 5. 2 CPI。 我试图获得一个函数来接受字符串变量或字符串字典 。

本代码 :

static int printTest(lua_State *L)
{   
    size_t lslen = NULL;
    const char *lsrc = lua_tolstring(L, 0, &lslen);
    printf("%s
", lsrc);
}
/* ----- Registration array ----- */
static const luaL_Reg testhook[] = {
        {"printTest", printTest},
        {NULL, NULL} /* sentinel */
};    
/* ----- Registration function ----- */    
LUALIB_API int registerTestHookFunctions(lua_State *L)
{
    lua_newtable(L); 
    lua_setglobal(L, "hook"); 
    lua_getglobal(L, "hook"); 
    luaL_setfuncs(L, testhook, 0); 
    lua_settop(L, 0);
    return 0;
}

当他从鲁阿那逃出来的时候,他将做这件事:

hook.printTest( hello )  -- prints  hello 
a =  hello 
hook.printTest(a) -- prints  a 

I m very new to Lua and using this documentation: http://www.lua.org/manual/5.2/manual.html and am not finding/understanding how to discern a variable from a literal. (There are no lua_isliteral() or lua_isvariable() methods, for example).

最佳回答

您已经通过一个错误的索引到 lua_toolstring 。 参考手册明确指出:

0从来不是可以接受的指数。

您使用相对值的负指数和绝对值的正指数。 这些条件都不是0。

问题回答

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