在C中迭代多维Lua表
我在C中迭代多维Lua表时遇到问题 将Lua表设为这样,即:在C中迭代多维Lua表,c,loops,multidimensional-array,lua,lua-table,C,Loops,Multidimensional Array,Lua,Lua Table,我在C中迭代多维Lua表时遇到问题 将Lua表设为这样,即: local MyLuaTable = { {0x04, 0x0001, 0x0001, 0x84, 0x000000}, {0x04, 0x0001, 0x0001, 0x84, 0x000010} } 我尝试扩展C示例代码: /* table is in the stack at index 't' */ lua_pushnil(L); /* first key */ while (lua_next(L, t) !
local MyLuaTable = {
{0x04, 0x0001, 0x0001, 0x84, 0x000000},
{0x04, 0x0001, 0x0001, 0x84, 0x000010}
}
我尝试扩展C示例代码:
/* table is in the stack at index 't' */
lua_pushnil(L); /* first key */
while (lua_next(L, t) != 0) {
/* uses 'key' (at index -2) and 'value' (at index -1) */
printf("%s - %s\n",
lua_typename(L, lua_type(L, -2)),
lua_typename(L, lua_type(L, -1)));
/* removes 'value'; keeps 'key' for next iteration */
lua_pop(L, 1);
}
第二方面:
/* table is in the stack at index 't' */
lua_pushnil(L); /* first key */ /* Iterating the first dimension */
while (lua_next(L, t) != 0)
{
/* uses 'key' (at index -2) and 'value' (at index -1) */
printf("%s - %s\n",
lua_typename(L, lua_type(L, -2)),
lua_typename(L, lua_type(L, -1)));
if(lua_istable(L, -1))
{
lua_pushnil(L); /* first key */ /* Iterating the second dimension */
while (lua_next(L, -2) != 0) /* table is in the stack at index -2 */
{
printf("%s - %s\n",
lua_typename(L, lua_type(L, -2)),
lua_typename(L, lua_type(L, -1)));
}
/* removes 'value'; keeps 'key' for next iteration */
lua_pop(L, 1);
}
/* removes 'value'; keeps 'key' for next iteration */
lua_pop(L, 1);
}
输出为:
“数字-表格””(从第一个维度开始)
“数字-数字”(从第二维度)
“编号-螺纹””(从第二维度)
之后,我的代码在“while(lua_next(L,-2)!=0”中崩溃
有人知道如何正确迭代二维Lua表吗?第二维的Lua\u pop(L,1)超出了您的迭代范围
while (lua_next(L, -2) != 0) /* table is in the stack at index -2 */
{
printf("%s - %s\n",
lua_typename(L, lua_type(L, -2)),
lua_typename(L, lua_type(L, -1)));
}
/* removes 'value'; keeps 'key' for next iteration */
lua_pop(L, 1);
您需要将其放入while循环中,以使其工作,从而删除该值,while条件中的lua_next()
会隐式地将该值放入堆栈中
while (lua_next(L, -2) != 0) /* table is in the stack at index -2 */
{
printf("%s - %s\n",
lua_typename(L, lua_type(L, -2)),
lua_typename(L, lua_type(L, -1)));
/* removes 'value'; keeps 'key' for next iteration */
lua_pop(L, 1);
}
这样,它应该像预期的那样工作