struct {.attr = value}語法是什麼意思？

Question

從fuse/examples/fsel.c

static struct fuse_operations fsel_oper = { 
    .getattr = fsel_getattr, 
    .readdir = fsel_readdir, 
    .open  = fsel_open, 
    .release = fsel_release, 
    .read  = fsel_read, 
    .poll  = fsel_poll, 
}; 

這是definitionof fuse_operations

struct fuse_operations_compat25 { 
    int (*getattr) (const char *, struct stat *); 
    int (*readlink) (const char *, char *, size_t); 
    int (*getdir) (const char *, fuse_dirh_t, fuse_dirfil_t); 
    int (*mknod) (const char *, mode_t, dev_t); 
    int (*mkdir) (const char *, mode_t); 
    int (*unlink) (const char *); 
    int (*rmdir) (const char *); 
    ..... 
}; 

所以什麼那些.是什麼意思？這是我第一次看到

Answer 1

這意味着以.命名的字段將具有該值。例如，gettr函數指針將指向fsel_getattr函數。