这个C语法是什么(在Linux drivers/net/bonding/bond_main.c中使用)？

Question

我以前写了很多C,但是我不认识这个语法:

static const char *names[] = {
    [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
    [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
    [BOND_MODE_XOR] = "load balancing (xor)",
    [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
    [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
    [BOND_MODE_TLB] = "transmit load balancing",
    [BOND_MODE_ALB] = "adaptive load balancing",
};

这[...] =部分对我来说很奇怪.(顺便说一句,BOND_MODE_ROUNDROBIN其他的是宏,它们只是扩展为整数.)

Answer 1

它被称为指定的初始化器,在C99中引入.GCC也支持它作为扩展.

它用于初始化结构和数组,有关详细信息,请参阅指定初始化程序.