• Trevor Parscal (45/45) May 16 2005 I want to declare a function, and later, specify the contents of that fu...
• John Demme (6/62) May 16 2005 Just delete the declaration. D supports forward references, making
• Derek Parnell (10/34) May 16 2005 The above line is redundant. D supports forward referencing.
• Trevor Parscal (7/41) May 16 2005 OK, I feel dumb, but also thankful for D's forward refrencing capabiliti...
• G.Vidal (3/3) May 18 2005 About that...
• Derek Parnell (29/34) May 18 2005 ... you are also given the 'headers'.
• John Reimer (11/51) May 18 2005 If I recall correctly, technically it's feasible for d to have a tool
• Derek Parnell (6/60) May 18 2005 Its already on the TODO list ;-)
• Charlie (6/67) May 18 2005 Cool! If you want to extract the symbols from the object file burton
• John Reimer (5/14) May 18 2005 Ohhh... I didn't see that. That's interesting. I'll have to check it

Trevor Parscal <Trevor_member pathlink.com> writes:

I want to declare a function, and later, specify the contents of that function.

Maybe i missed it in the documenation, but I have been looking for quite some
time. I am a C++ programmer who recently converted to D, so this seems like
something I should be able to do.

////////////////////////////////////

int foo(int i);

int main()
{
retrun foo(5);
}

int foo(int i)
{
return i * 2;
}

////////////////////////////////////

The problem is that D won't let me declare the function, and later spectify the
actual contents of the function.

I need to be able to do this, mostly specifying the contents of the function in
another module...

Thanks in advance for your help.

I attached a real example.

Trevor Parscal
www.trevorparscal.com
trevorparscal hotmail.com
begin 0644 Test.d
M:6UP;W)T('-T9"YC+G=I;F1O=W,N=VEN9&]W<SL-"FEM<&]R="!S=&0N<W1R





M;DUA:6XH2$E.4U1!3D-%(%]I;G-T86YC92P 2$E.4U1!3D-%(%]P<F5V:6YS

M:6YT(')E<W5L=#L-


M;&PL(&9O<FUA="A-86EN*&DI*2P (D5R<F]R(BP 34)?3TL ?"!-0E])0T].

M3V)J96-T(%]O*0T*("` ('L-" D)365S<V%G94)O>$$H;G5L;"P 8V%S="AC
M:&%R("HI7V\N=&]3=')I;F<H*2P (D5R<F]R(BP 34)?3TL ?"!-0E])0T].



`
end

John Demme <me teqdruid.com> writes:

Just delete the declaration.  D supports forward references, making
stuff like what you're doing unnecessary.  In addition, if you put the
function in another module, you simply import the module, no need to put
declarations in each module that wants to use the function.

John Demme

On Tue, 2005-05-17 at 04:45 +0000, Trevor Parscal wrote:
 I want to declare a function, and later, specify the contents of that function.
 
 Maybe i missed it in the documenation, but I have been looking for quite some
 time. I am a C++ programmer who recently converted to D, so this seems like
 something I should be able to do.
 
 ////////////////////////////////////
 
 int foo(int i);
 
 int main()
 {
 retrun foo(5);
 }
 
 int foo(int i)
 {
 return i * 2;
 }
 
 ////////////////////////////////////
 
 The problem is that D won't let me declare the function, and later spectify the
 actual contents of the function.
 
 I need to be able to do this, mostly specifying the contents of the function in
 another module...
 
 Thanks in advance for your help.
 
 I attached a real example.
 
 Trevor Parscal
 www.trevorparscal.com
 trevorparscal hotmail.com
 begin 0644 Test.d
 M:6UP;W)T('-T9"YC+G=I;F1O=W,N=VEN9&]W<SL-"FEM<&]R="!S=&0N<W1R





 M;DUA:6XH2$E.4U1!3D-%(%]I;G-T86YC92P 2$E.4U1!3D-%(%]P<F5V:6YS

 M:6YT(')E<W5L=#L-


 M;&PL(&9O<FUA="A-86EN*&DI*2P (D5R<F]R(BP 34)?3TL ?"!-0E])0T].

 M3V)J96-T(%]O*0T*("` ('L-" D)365S<V%G94)O>$$H;G5L;"P 8V%S="AC
 M:&%R("HI7V\N=&]3=')I;F<H*2P (D5R<F]R(BP 34)?3TL ?"!-0E])0T].



 `
 end

Derek Parnell <derek psych.ward> writes:

On Tue, 17 May 2005 04:45:49 +0000 (UTC), Trevor Parscal wrote:

 I want to declare a function, and later, specify the contents of that function.

Why? This isn't needed in D.

 Maybe i missed it in the documenation, but I have been looking for quite some
 time. I am a C++ programmer who recently converted to D, so this seems like
 something I should be able to do.
 
 ////////////////////////////////////
 
 int foo(int i);

The above line is redundant. D supports forward referencing.

 int main()
 {
 retrun foo(5);
 }
 
 int foo(int i)
 {
 return i * 2;
 }
 
 ////////////////////////////////////
 
 The problem is that D won't let me declare the function, and later spectify the
 actual contents of the function.

That right. 

 I need to be able to do this, mostly specifying the contents of the function in
 another module...

No, you don't need to. Just use the import statement if its in another file
otherwise you don't need to pre-declare it.

-- 
Derek
Melbourne, Australia
17/05/2005 3:27:51 PM

Trevor Parscal <Trevor_member pathlink.com> writes:

In article <1hz4l06kira98.3o0cvll7zs0q$.dlg 40tude.net>, Derek Parnell says...
On Tue, 17 May 2005 04:45:49 +0000 (UTC), Trevor Parscal wrote:

 I want to declare a function, and later, specify the contents of that function.

Why? This isn't needed in D.

 Maybe i missed it in the documenation, but I have been looking for quite some
 time. I am a C++ programmer who recently converted to D, so this seems like
 something I should be able to do.
 
 ////////////////////////////////////
 
 int foo(int i);

The above line is redundant. D supports forward referencing.

 int main()
 {
 retrun foo(5);
 }
 
 int foo(int i)
 {
 return i * 2;
 }
 
 ////////////////////////////////////
 
 The problem is that D won't let me declare the function, and later spectify the
 actual contents of the function.

That right. 

 I need to be able to do this, mostly specifying the contents of the function in
 another module...

No, you don't need to. Just use the import statement if its in another file
otherwise you don't need to pre-declare it.

-- 
Derek
Melbourne, Australia
17/05/2005 3:27:51 PM

OK, I feel dumb, but also thankful for D's forward refrencing capabilities.
Knowing C++ so well really screws me up sometimes.. 

Thanks to both replies.

Trevor Parscal
www.trevorparscal.com
trevorparscal hotmail.com

"G.Vidal" <gyvidal wanadoo.fr> writes:

About that...

What if we want to distribute a library without the source code?

In C/C++ we'd have given the headers but in D...

Derek Parnell <derek psych.ward> writes:

On Wed, 18 May 2005 12:48:23 +0200, G.Vidal wrote:

 About that...
 
 What if we want to distribute a library without the source code?
 
 In C/C++ we'd have given the headers but in D...

... you are also given the 'headers'.

[realmod.d]
 module realmod;
 class Foo
 {
    private anInt;
    this(){ anInt =2; }
 }
 void Func(dchar[] a, real b)
 {
     a[0] = cast(int)b;
 }
  
--------------
 [headmod.d]
 module realmod;
 class Foo
 {
    this();
 }
 void Func(dchar[] a, real b);

----------

You compile 'realmod.d' and archive 'realmod.obj' into 'reallib.lib'. 

You distribute 'reallib.lib' and 'headmod.d'.


-- 
Derek Parnell
Melbourne, Australia
18/05/2005 8:57:00 PM

John Reimer <brk_6502 yahoo.com> writes:

Derek Parnell wrote:
 On Wed, 18 May 2005 12:48:23 +0200, G.Vidal wrote:
 
 
About that...

What if we want to distribute a library without the source code?

In C/C++ we'd have given the headers but in D...

 
 
 ... you are also given the 'headers'.
 
 [realmod.d]
  module realmod;
  class Foo
  {
     private anInt;
     this(){ anInt =2; }
  }
  void Func(dchar[] a, real b)
  {
      a[0] = cast(int)b;
  }
   
 --------------
  [headmod.d]
  module realmod;
  class Foo
  {
     this();
  }
  void Func(dchar[] a, real b);
 
 ----------
 
 You compile 'realmod.d' and archive 'realmod.obj' into 'reallib.lib'. 
 
 You distribute 'reallib.lib' and 'headmod.d'.
 
 

If I recall correctly, technically it's feasible for d to have a tool 
that extracts the required symbol information from the object file (or 
library), thus removing the necessity of headers.

I think Walter mentioned this the last time the topic came up to counter 
my bemoaning the fact that headers were still necessary.  He said it 
just wasn't implemented yet.  I for one would love to see that 
implemented!  It would sure keep the source file and import paths down 
to a minimum.  Ooooo... just think, Derek, another nifty feature for 
build! ;-)

-JJR

Derek Parnell <derek psych.ward> writes:

On Wed, 18 May 2005 04:36:57 -0700, John Reimer wrote:

 Derek Parnell wrote:
 On Wed, 18 May 2005 12:48:23 +0200, G.Vidal wrote:
 
 
About that...

What if we want to distribute a library without the source code?

In C/C++ we'd have given the headers but in D...

 
 
 ... you are also given the 'headers'.
 
 [realmod.d]
  module realmod;
  class Foo
  {
     private anInt;
     this(){ anInt =2; }
  }
  void Func(dchar[] a, real b)
  {
      a[0] = cast(int)b;
  }
   
 --------------
  [headmod.d]
  module realmod;
  class Foo
  {
     this();
  }
  void Func(dchar[] a, real b);
 
 ----------
 
 You compile 'realmod.d' and archive 'realmod.obj' into 'reallib.lib'. 
 
 You distribute 'reallib.lib' and 'headmod.d'.
 
 

 
 If I recall correctly, technically it's feasible for d to have a tool 
 that extracts the required symbol information from the object file (or 
 library), thus removing the necessity of headers.
 
 I think Walter mentioned this the last time the topic came up to counter 
 my bemoaning the fact that headers were still necessary.  He said it 
 just wasn't implemented yet.  I for one would love to see that 
 implemented!  It would sure keep the source file and import paths down 
 to a minimum.  Ooooo... just think, Derek, another nifty feature for 
 build! ;-)
 
 -JJR

Its already on the TODO list ;-)

-- 
Derek Parnell
Melbourne, Australia
19/05/2005 1:56:56 AM

"Charlie" <charles jwavro.com> writes:

 Its already on the TODO list ;-)

Cool!  If you want to extract the symbols from the object file burton
radon's digc does this with omflistexport's ( os something similar ) , worth
checking out :).

Charlie


"Derek Parnell" <derek psych.ward> wrote in message
news:1n55thixdis1t.1ne0krr04bai9.dlg 40tude.net...
 On Wed, 18 May 2005 04:36:57 -0700, John Reimer wrote:

 Derek Parnell wrote:
 On Wed, 18 May 2005 12:48:23 +0200, G.Vidal wrote:


About that...

What if we want to distribute a library without the source code?

In C/C++ we'd have given the headers but in D...


 ... you are also given the 'headers'.

 [realmod.d]
  module realmod;
  class Foo
  {
     private anInt;
     this(){ anInt =2; }
  }
  void Func(dchar[] a, real b)
  {
      a[0] = cast(int)b;
  }

 --------------
  [headmod.d]
  module realmod;
  class Foo
  {
     this();
  }
  void Func(dchar[] a, real b);

 ----------

 You compile 'realmod.d' and archive 'realmod.obj' into 'reallib.lib'.

 You distribute 'reallib.lib' and 'headmod.d'.

 If I recall correctly, technically it's feasible for d to have a tool
 that extracts the required symbol information from the object file (or
 library), thus removing the necessity of headers.

 I think Walter mentioned this the last time the topic came up to counter
 my bemoaning the fact that headers were still necessary.  He said it
 just wasn't implemented yet.  I for one would love to see that
 implemented!  It would sure keep the source file and import paths down
 to a minimum.  Ooooo... just think, Derek, another nifty feature for
 build! ;-)

 -JJR

 Its already on the TODO list ;-)

 --
 Derek Parnell
 Melbourne, Australia
 19/05/2005 1:56:56 AM

John Reimer <brk_6502 yahoo.com> writes:

Charlie wrote:
Its already on the TODO list ;-)

 
 
 Cool!  If you want to extract the symbols from the object file burton
 radon's digc does this with omflistexport's ( os something similar ) , worth
 checking out :).
 
 Charlie
 

Ohhh... I didn't see that.  That's interesting.  I'll have to check it 
out.  Last I heard, Burton was also working on a new, improved digc.  I 
wonder how that is coming along.  Can't get enough of these great tools.

-JJR