• Temtaime (10/10) Apr 28 2013 int main() {
• =?UTF-8?B?QWxpIMOHZWhyZWxp?= (4/14) Apr 28 2013 It is probably one of the known issues with default delegate parameters:
• bearophile (4/5) Apr 28 2013 I don't understand this syntax.
• =?UTF-8?B?QWxpIMOHZWhyZWxp?= (4/9) Apr 28 2013 The name of the parameter is omitted. Could have named it as 'p':
• bearophile (6/9) Apr 28 2013 OK. But is it syntactically allowed in D to omit the variable
• Maxim Fomin (14/24) Apr 28 2013 That's because currently no variable name means _param_XXX,

"Temtaime" <temtaime gmail.com> writes:

int main() {
         auto f = (bool = false) {};

         f();
         return 0;
}

I can't compile this code on
DMD32 D Compiler v2.062

On windows. It says to me:
Error: expected 1 function arguments, not 0

On linux it seems to work(http://ideone.com/fsKYWR).

=?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:

On 04/28/2013 01:53 AM, Temtaime wrote:
 int main() {
          auto f = (bool = false) {};

          f();
          return 0;
 }

 I can't compile this code on
 DMD32 D Compiler v2.062

 On windows. It says to me:
 Error: expected 1 function arguments, not 0

 On linux it seems to work(http://ideone.com/fsKYWR).

It is probably one of the known issues with default delegate parameters:

   http://d.puremagic.com/issues/show_bug.cgi?id=3866

Ali

"bearophile" <bearophileHUGS lycos.com> writes:

Temtaime:

         auto f = (bool = false) {};

I don't understand this syntax.

Bye,
bearophile

=?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:

On 04/28/2013 09:14 AM, bearophile wrote:
 Temtaime:

         auto f = (bool = false) {};

 I don't understand this syntax.

 Bye,
 bearophile

The name of the parameter is omitted. Could have named it as 'p':

     auto f = (bool p = false) {};

Ali

"bearophile" <bearophileHUGS lycos.com> writes:

Ali Çehreli:

 The name of the parameter is omitted. Could have named it as 
 'p':

     auto f = (bool p = false) {};

OK. But is it syntactically allowed in D to omit the variable 
name when there is a default argument? I have never seen it 
before...

Bye,
bearophile

"Maxim Fomin" <maxim maxim-fomin.ru> writes:

On Sunday, 28 April 2013 at 18:40:20 UTC, bearophile wrote:
 Ali Çehreli:

 The name of the parameter is omitted. Could have named it as 
 'p':

    auto f = (bool p = false) {};

 OK. But is it syntactically allowed in D to omit the variable 
 name when there is a default argument? I have never seen it 
 before...

 Bye,
 bearophile

That's because currently no variable name means _param_XXX,
moreover it can be accessed.

int dummy;

void foo(ref int = dummy)
{
	_param_0 = -1;
}

void main()
{
	int x;
	foo(x);
	assert(x is -1);
}