const ptr to const ptr ?

[franco ziade]

is that permitted? int const*const* p;

what does it mean ? meaning both pointers can only look at a constant
location and the value of the int can only change? this means no array?

Thanks

 

[Jarmo]

is that permitted? int const*const* p;

My guess is that you will never see this in practice. And if you do, head
over to that guy's cubicle with a big stick ;-)

 

[Clark S. Cox III]

is that permitted? int const*const* p;

what does it mean ?

Start from the right:

p
*p ...is a pointer
const *p ...to a constant
*const *p ...pointer
const *const *p ... to a constant
int const *const *p ... int

So, altogether: "p is a pointer to a constant pointer to a constant int"

meaning both pointers can only look at a constant
location and the value of the int can only change?

(p) is not constant (i.e. you can change what p points to)
(*p) is constant (i.e. you cannot change what *p points to)
(**p) is a constant int (you cannot change its value)

this means no array?

No, it could very well be a pointer to an array of pointers.

 

[franco ziade]

I posted this twice - my apologies - this message to be ignored