• AJ (15/15) Nov 12 2009 I can't imagine anyone that knows D doesn't also know C++, but the
• Ellery Newcomer (2/22) Nov 12 2009 not if you want to keep Doit virtual.
• BCS (3/20) Nov 12 2009 AFAIK That is not supported. You can do it by declaring an extern(C) fun...
• Steven Schveighoffer (14/30) Nov 13 2009 You can define MyClass in a .di file without implementations, and then
• bearophile (5/8) Nov 13 2009 In LDC there's a way to tell the compiler that a function that contains ...

"AJ" <aj nospam.net> writes:

   I can't imagine anyone that knows D doesn't also know C++, but the 
opposite is hardly true, so here's some valid C++ that I'm wondering if 
there is an equivalent style allowed in D:

class MyClass
{
  public:
   void DoIt();
};

void MyClass::DoIt()
{
    // do it
}

   (Aside: D has no 'inline' keyword, correct? And, should I post questions 
like this post in the learn group? Even if the potential is likely that a 
language design discussion may result?)

Ellery Newcomer <ellery-newcomer utulsa.edu> writes:

AJ wrote:
    I can't imagine anyone that knows D doesn't also know C++, but the 
 opposite is hardly true, so here's some valid C++ that I'm wondering if 
 there is an equivalent style allowed in D:
 
 class MyClass
 {
   public:
    void DoIt();
 };
 
 void MyClass::DoIt()
 {
     // do it
 }
 
    (Aside: D has no 'inline' keyword, correct? And, should I post questions 
 like this post in the learn group? Even if the potential is likely that a 
 language design discussion may result?)
 
 

not if you want to keep Doit virtual.

BCS <none anon.com> writes:

Hello aJ,

 I can't imagine anyone that knows D doesn't also know C++, but the
 opposite is hardly true, so here's some valid C++ that I'm wondering
 if there is an equivalent style allowed in D:
 
 class MyClass
 {
 public:
 void DoIt();
 };
 void MyClass::DoIt()
 {
 // do it
 }
 (Aside: D has no 'inline' keyword, correct? And, should I post
 questions like this post in the learn group? Even if the potential is
 likely that a language design discussion may result?)
 

AFAIK That is not supported. You can do it by declaring an extern(C) function 
named with whatever that method's name mangles to ... but why? 

"Steven Schveighoffer" <schveiguy yahoo.com> writes:

On Thu, 12 Nov 2009 23:19:21 -0500, AJ <aj nospam.net> wrote:

    I can't imagine anyone that knows D doesn't also know C++, but the
 opposite is hardly true, so here's some valid C++ that I'm wondering if
 there is an equivalent style allowed in D:

 class MyClass
 {
   public:
    void DoIt();
 };

 void MyClass::DoIt()
 {
     // do it
 }

You can define MyClass in a .di file without implementations, and then  
rewrite it in the .d file with implementations.  That's about as close as  
you can get.

    (Aside: D has no 'inline' keyword, correct? And, should I post  
 questions
 like this post in the learn group? Even if the potential is likely that a
 language design discussion may result?)

d.learn is probably the right place, though most people look at both.   
You'll get the occasional OCD post about how newbie questions really  
should be on d.learn, but it doesn't bother me :)

inlining is done automatically by the compiler as long as it can see the  
entire function source and you pass the -inline command line switch to the  
compiler.

The theory being -- the compiler probably knows better what things are  
good to inline.  In practice, this sometimes isn't the case, but it's all  
we have to work with right now.

-Steve

bearophile <bearophileHUGS lycos.com> writes:

Steven Schveighoffer:

 The theory being -- the compiler probably knows better what things are  
 good to inline.  In practice, this sometimes isn't the case, but it's all  
 we have to work with right now.

In LDC there's a way to tell the compiler that a function that contains asm is
suitable for inlining. In LDC there's also a compilation flag that accepts a
number, that's the inlining threshold, you can use it to inline less or inline
more.

I think 97% of the times the LDC compiler is able to do a good enough job of
inlining. I remember only two times where LDC has not inlined something in need
to be inlined. In this situations I've had to use an ugly string mixin, to
create a kind of C macro, to inline those things by hand...

Bye,
bearophile