• "Janice Caron" <caron serenityfirefly.com> Sep 07 2007

"Janice Caron" <caron serenityfirefly.com> writes:

OK. Not quite what I was getting at, but still useful, thanks.

In that case, what is the difference between:

 int f(const void * p, int len)

and

 int f(const(void *) p, int len)

?

Put another way: what's the difference between "const (...)" with brackets and 
"const ..." without? What happens when you take the brackets away? What is the 
difference between const as a parameter storage class, and const as a type 
modifier?



The following really does compile without error:

 void f(const const(int) p)

and I don't understand what the two different versions of "const" are each 
doing.




-----Original Message-----
From: digitalmars-d-bounces puremagic.com 
[mailto:digitalmars-d-bounces puremagic.com] On Behalf Of Xinok
Sent: 07 September 2007 11:08
To: digitalmars-d puremagic.com
Subject: Re: What is the difference between...

 const void*
 This can also be read as:
 const(void*)
 This means that both 'void' and the pointer are const.

 const(void)*
 The pointer is mutable, but the data it points to must be const, even though 
 it doesn't know the type of the data.

 Janice Caron wrote:
 What is the difference between:

 int f(const void * p, int len)

 and

 int f(const(void)* p, int len)

 ?