I'm looking at the D reference manual in the "arrays" section. It says under "usage":

int* p;
int[3] s;

p = s;		// p points to the first element of the array s.

But when I try this I get:
"cannot implicitly convert expression (s) of type int[3] to int*."

Why? Is the manual wrong or the compiler or what am I missing?

-- Henrik (newbie)

Henrik Harmsen escribió:
> I'm looking at the D reference manual in the "arrays" section. It says under "usage":
> 
> int* p;
> int[3] s;
> 
> p = s;		// p points to the first element of the array s.
> 
> But when I try this I get:
> "cannot implicitly convert expression (s) of type int[3] to int*."
> 
> Why? Is the manual wrong or the compiler or what am I missing?

The manual is wrong, this was deprecated not too long ago.

-- 
Leandro Lucarella
Integratech S.A.
4571-5252

Leandro Lucarella Wrote:

> Henrik Harmsen escribió:
> > I'm looking at the D reference manual in the "arrays" section. It says under "usage":
> > 
> > int* p;
> > int[3] s;
> > 
> > p = s;		// p points to the first element of the array s.
> > 
> > But when I try this I get:
> > "cannot implicitly convert expression (s) of type int[3] to int*."
> > 
> > Why? Is the manual wrong or the compiler or what am I missing?
> 
> The manual is wrong, this was deprecated not too long ago.
> 
> -- 
> Leandro Lucarella
> Integratech S.A.
> 4571-5252


Oh..

Deprecated in what way? Made illegal or obsolete or..?

Can I use an explicit cast? Will it work?

Like this:
p = cast(int*)s;		// p points to the first element of the array s.
?

-- Henrik

"Henrik Harmsen" <henrik@harmsen.se> wrote in message news:erka4u$2e0n$1@digitalmars.com...
>
> Deprecated in what way? Made illegal or obsolete or..?

Made illegal.  There were too many "gotchas" when passing arrays to C functions (which is really the only time this conversion was used).

> Can I use an explicit cast? Will it work?

You can just use the .ptr property of the array:

char* p = s.ptr;

Henrik Harmsen Wrote:
<snip>
> Deprecated in what way? Made illegal or obsolete or..?

Effectively, obsolete but not yet illegal.  Code that uses deprecated features can still be compiled using the -d compiler option.

> Can I use an explicit cast? Will it work?
> 
> Like this:
> p = cast(int*)s;	// p points to the first element of the array s.
> ?

You could, but perhaps nicer is to just use the .ptr property.

Stewart.

Henrik Harmsen wrote:
> Leandro Lucarella Wrote:
> 
>> Henrik Harmsen escribió:
>>> I'm looking at the D reference manual in the "arrays" section. It says under "usage":
>>>
>>> int* p;
>>> int[3] s;
>>>
>>> p = s;		// p points to the first element of the array s.
>>>
>>> But when I try this I get:
>>> "cannot implicitly convert expression (s) of type int[3] to int*."
>>>
>>> Why? Is the manual wrong or the compiler or what am I missing?
>> The manual is wrong, this was deprecated not too long ago.
>>
>> -- 
>> Leandro Lucarella
>> Integratech S.A.
>> 4571-5252
> 
> 
> Oh..
> 
> Deprecated in what way? Made illegal or obsolete or..?
> 
> Can I use an explicit cast? Will it work?
> 
> Like this:
> p = cast(int*)s;		// p points to the first element of the array s.
> ?
> 
> -- Henrik
> 
The best way I can find is to:
p = &s[0];

Or as others have said, just use the .ptr property.