• Wanderer (6/6) May 28 2014 Java misses this feature badly, forcing programmers to copy-paste
• Namespace (2/9) May 28 2014 Default parameters? Of course. Every good language does that. :)
• Rene Zwanenburg (4/15) May 28 2014 No named parameters though:
• bearophile (5/6) May 28 2014 You can answer by yourself similar questions online here:
• Wanderer (2/8) May 28 2014 Thanks! :-)
• Ary Borenszweig (20/26) May 28 2014 Regarding this, is this supposed to work?
• Dicebot (4/7) May 28 2014 I can't find exact place in spec but AFAIK default arguments in D

"Wanderer" <no-reply no-reply.org> writes:

Java misses this feature badly, forcing programmers to copy-paste 
bloated code (constructor A calls constructor B with fewer 
arguments, constructor B calls constructor C etc, same thing with 
methods). Please tell me, does D support this feature?

int myNiceFunc(double a, double b=0, int c=0) {...}

auto n = myNiceFunc(100);

"Namespace" <rswhite4 googlemail.com> writes:

On Wednesday, 28 May 2014 at 11:54:30 UTC, Wanderer wrote:
 Java misses this feature badly, forcing programmers to 
 copy-paste bloated code (constructor A calls constructor B with 
 fewer arguments, constructor B calls constructor C etc, same 
 thing with methods). Please tell me, does D support this 
 feature?

 int myNiceFunc(double a, double b=0, int c=0) {...}

 auto n = myNiceFunc(100);

Default parameters? Of course. Every good language does that. :)

"Rene Zwanenburg" <renezwanenburg gmail.com> writes:

On Wednesday, 28 May 2014 at 11:57:51 UTC, Namespace wrote:
 On Wednesday, 28 May 2014 at 11:54:30 UTC, Wanderer wrote:
 Java misses this feature badly, forcing programmers to 
 copy-paste bloated code (constructor A calls constructor B 
 with fewer arguments, constructor B calls constructor C etc, 
 same thing with methods). Please tell me, does D support this 
 feature?

 int myNiceFunc(double a, double b=0, int c=0) {...}

 auto n = myNiceFunc(100);

 Default parameters? Of course. Every good language does that. :)

No named parameters though:


int myNiceFunc(double a, double b=0, int c=0) {...}

auto n = myNiceFunc(100, c: 5); // Doesn't work

"bearophile" <bearophileHUGS lycos.com> writes:

Wanderer:

 Please tell me, does D support this feature?

You can answer by yourself similar questions online here:
http://dpaste.dzfl.pl/

Bye,
bearophile

"Wanderer" <no-reply no-reply.org> writes:

On Wednesday, 28 May 2014 at 13:01:52 UTC, bearophile wrote:
 Wanderer:

 Please tell me, does D support this feature?

 You can answer by yourself similar questions online here:
 http://dpaste.dzfl.pl/

 Bye,
 bearophile

Thanks! :-)

Ary Borenszweig <ary esperanto.org.ar> writes:

On 5/28/14, 8:54 AM, Wanderer wrote:
 Java misses this feature badly, forcing programmers to copy-paste
 bloated code (constructor A calls constructor B with fewer arguments,
 constructor B calls constructor C etc, same thing with methods). Please
 tell me, does D support this feature?

 int myNiceFunc(double a, double b=0, int c=0) {...}

 auto n = myNiceFunc(100);

Regarding this, is this supposed to work?

---
import std.stdio;

class Foo {
   int bar() {
     return 1;
   }

   int foo(int x = bar()) {
     return x;
   }
}

void main() {
   new Foo().foo();
}
---

I get:

coco.d(8): Error: need 'this' to access member bar

But there is a 'this' in that place (it's not a static function).

Should I file this as a bug?

"Dicebot" <public dicebot.lv> writes:

On Wednesday, 28 May 2014 at 17:11:09 UTC, Ary Borenszweig wrote:
 But there is a 'this' in that place (it's not a static 
 function).

 Should I file this as a bug?

I can't find exact place in spec but AFAIK default arguments in D 
are evaluated in context of call scope, same as in C. Could have 
detected the problem earlier with better error message though.