• Benjamin Herr (6/6) Jun 16 2005 Hello, D,
• Walter (4/9) Jun 18 2005 In D you'll need to specify the number of members of it:
• Manfred Nowak (16/21) Jun 18 2005 Nice to see, that it should work this way, but it does not.
• Denis R (10/38) Jun 19 2005 Hi,
• Manfred Nowak (8/10) Jun 19 2005 [...]
• Jarrett Billingsley (4/9) Jun 18 2005 You would use a pointer, just like how arrays are pointers in C. So you...

Benjamin Herr <ben 0x539.de> writes:

Hello, D,

as I understand it, the C declaration `` extern T a[]; '' declares an
elsewhere-defined array of Ts, without specifying the amount of members,
which needs to be given at the point of definition.

What is the analogous in D?


 -- ben

"Walter" <newshound digitalmars.com> writes:

"Benjamin Herr" <ben 0x539.de> wrote in message
news:d8t27v$7c$1 digitaldaemon.com...
 Hello, D,

 as I understand it, the C declaration `` extern T a[]; '' declares an
 elsewhere-defined array of Ts, without specifying the amount of members,
 which needs to be given at the point of definition.

 What is the analogous in D?

In D you'll need to specify the number of members of it:

    extern T[6] a;    // or however many members there are

Manfred Nowak <svv1999 hotmail.com> writes:

"Walter" <newshound digitalmars.com> wrote:
[...]
 In D you'll need to specify the number of members of it:
 
     extern T[6] a;    // or however many members there are

Nice to see, that it should work this way, but it does not.

---- lib.c ----
int arr[100]={100,1};
---- user.d ------
import std.stdio;

extern int[100] arr;

void main(){
  writefln( arr[0]);
}
------------------

 dmc -c lib.c
 dmd user.d lib.obj

|  Error 42: Symbol Undefined _D4user3arrG100i

Even if you introduce the forgotten "extern (C)":
|  Error 1: Previous Definition Different : _arr

-manfred

Denis R <denis_r telkomsa.net> writes:

Hi, 

Its actually working here.

I have in separate d file, which you make sure is not being compiled (thanks
Ben  #d irc.freenode.net :)

extern (C)
{
	uint[128] acs_map;
}


then in other module  just using it normally.



On Sun, 19 Jun 2005 02:15:11 +0000 (UTC)
Manfred Nowak <svv1999 hotmail.com> wrote:

 "Walter" <newshound digitalmars.com> wrote:
 [...]
 In D you'll need to specify the number of members of it:
 
     extern T[6] a;    // or however many members there are

 
 Nice to see, that it should work this way, but it does not.
 
 ---- lib.c ----
 int arr[100]={100,1};
 ---- user.d ------
 import std.stdio;
 
 extern int[100] arr;
 
 void main(){
   writefln( arr[0]);
 }
 ------------------
 
 dmc -c lib.c
 dmd user.d lib.obj

 |  Error 42: Symbol Undefined _D4user3arrG100i
 
 Even if you introduce the forgotten "extern (C)":
 |  Error 1: Previous Definition Different : _arr
 
 -manfred

Manfred Nowak <svv1999 hotmail.com> writes:

Denis R <denis_r telkomsa.net> wrote:

[...]
 I have in separate d file, which you make sure is not being
 compiled (thanks Ben  #d irc.freenode.net :) 

[...]

Thx. I should have looked into the htomodule-specs first.

The need to give a number somehow looks like a defect to me, because 
it suffices to give a number large enough to inactivate the bounds 
check.

-manfred

"Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:

"Benjamin Herr" <ben 0x539.de> wrote in message 
news:d8t27v$7c$1 digitaldaemon.com...
 Hello, D,

 as I understand it, the C declaration `` extern T a[]; '' declares an
 elsewhere-defined array of Ts, without specifying the amount of members,
 which needs to be given at the point of definition.

 What is the analogous in D?

You would use a pointer, just like how arrays are pointers in C.  So you'd 
write "extern T* a."