Validity/Invalidity of the code

[Rajesh S R]

Can anyone explain the validity/invalidity of the following code as
per the C standards?

struct node
{
int a;
float;/*Declarator without any identifier*/

struct node2;/*a struct tag declaration*/

struct node* ptr;
};

int main( void )
{
int a, b;
double;/*A declarator without any identifier*/
char;/*A declarator without any identifier*/

}
Thanks in advance for the reply.

[=?utf-8?B?SGFyYWxkIHZhbiBExLNr?=]

Rajesh S R wrote:

Can anyone explain the validity/invalidity of the following code as
per the C standards?

I'm assuming you know they're invalid, so I'll just list the
constraints they violate.

struct node
{
int a;
float;/*Declarator without any identifier*/

^ [1]

struct node2;/*a struct tag declaration*/

^ [1] + [2]

struct node* ptr;
};

int main( void )
{
int a, b;
double;/*A declarator without any identifier*/

^ [3]

char;/*A declarator without any identifier*/

^ [3]

}
Thanks in advance for the reply.

[1] Syntax error: the declarator may be omitted only in bit-fields
(6.7.2.1)
[2] "A structure or union shall not contain a member with incomplete
or function type" (6.7.2.1)
[3] "A declaration shall declare at least a declarator (other than the
parameters of a function or the members of a structure or union), a
tag, or the members of an enumeration." (6.7)