• Kasra Sadeghi (14/14) Sep 22 2020 Hi everyone!
• =?UTF-8?Q?Ali_=c3=87ehreli?= (15/23) Sep 22 2020 That should be 'alias' instead of 'class':
• Kasra Sadeghi (2/8) Sep 22 2020 Thanks! Wish there was a less redundant syntax for the arrays.
• =?UTF-8?Q?Ali_=c3=87ehreli?= (15/26) Sep 22 2020 Do you really need to write literal Value arrays? If not, you would=20

Kasra Sadeghi <kasra.sadeghi1 gmail.com> writes:

Hi everyone!

What's the syntax for passing an array of Algebraics?

definition:

  class None {}
  class Value = Algebraic!(int, double, string, None);

  void printValue(Value[] values) {
    foreach(value; values) {
      value.writeln;
    }
  }

usage attempts:

  printValue([4.5]);
  printValue(Value[4.5]);
  printValue(Value[](4.5));

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 9/22/20 2:30 PM, Kasra Sadeghi wrote:
 Hi everyone!
=20
 What's the syntax for passing an array of Algebraics?
=20
 definition:
=20
  =C2=A0class None {}
  =C2=A0class Value =3D Algebraic!(int, double, string, None);

That should be 'alias' instead of 'class':

import std.variant;
import std.stdio;

class None {}
alias Value =3D Algebraic!(int, double, string, None);

void printValue(Value[] values) {
   foreach(value; values) {
     value.writeln;
   }
}

void main() {
   printValue([Value(4.5), Value("hello"), Value(42)]);
}

Ali

Kasra Sadeghi <kasra.sadeghi1 gmail.com> writes:

On Tuesday, 22 September 2020 at 21:36:48 UTC, Ali Çehreli wrote:
 ...
 alias Value = Algebraic!(int, double, string, None);
 ...
 void main() {
   printValue([Value(4.5), Value("hello"), Value(42)]);
 }

Thanks! Wish there was a less redundant syntax for the arrays.

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 9/22/20 2:53 PM, Kasra Sadeghi wrote:
 On Tuesday, 22 September 2020 at 21:36:48 UTC, Ali =C3=87ehreli wrote:
 ...
 alias Value =3D Algebraic!(int, double, string, None);
 ...
 void main() {
 =C2=A0 printValue([Value(4.5), Value("hello"), Value(42)]);
 }

=20
 Thanks! Wish there was a less redundant syntax for the arrays.
=20
=20

Do you really need to write literal Value arrays? If not, you would=20
build a Value[] at runtime without seeing the syntax above.

Still, here is a function template that provides better syntax:

Value[] valueArray(Args...)(Args args) {
   Value[] result;
   foreach (arg; args) {
     result ~=3D Value(arg);
   }
   return result;
}

void main() {
   printValue(valueArray(4.5, "hello", 42));
}

Ali