• Enjoys Math (8/8) Feb 08 2016 This:
• Basile B. (8/16) Feb 08 2016 Use an intermediate to carry the result of &:
• =?UTF-8?Q?Ali_=c3=87ehreli?= (16/24) Feb 08 2016 When initializing the array, you have to use Variant(&b):
• Wyatt (7/15) Feb 09 2016 I've found bugbears like this are distressingly common in

Enjoys Math <enjoysmath gmail.com> writes:

This:	
         double b = 1.0;

	Variant[string] aa = ["b": &b];

	writeln(aa["b"]);

fails with:

Error: cannot implicitly convert expression(["b":&b]) of type 
double*[string] to VariantN!20u[string]

Helps please!

Basile B. <b2.temp gmx.com> writes:

On Tuesday, 9 February 2016 at 03:49:11 UTC, Enjoys Math wrote:
 This:	
         double b = 1.0;

 	Variant[string] aa = ["b": &b];

 	writeln(aa["b"]);

 fails with:

 Error: cannot implicitly convert expression(["b":&b]) of type 
 double*[string] to VariantN!20u[string]

 Helps please!

Use an intermediate to carry the result of &<stuff>:

double b = 1.0;
Variant vb = &b;
Variant[string] aa = ["b": vb];
writeln(aa["b"]);

&b is a rvalue.
vb is a lvalue.

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

On 02/08/2016 07:49 PM, Enjoys Math wrote:
 This:
          double b = 1.0;

      Variant[string] aa = ["b": &b];

      writeln(aa["b"]);

 fails with:

 Error: cannot implicitly convert expression(["b":&b]) of type
 double*[string] to VariantN!20u[string]

 Helps please!

When initializing the array, you have to use Variant(&b):

import std.stdio;
import std.variant;

void main() {
     double b = 1.5;

     Variant[string] aa = ["b": Variant(&b)];

     writeln(aa);
     writeln(aa["b"]);
     writeln(*aa["b"].get!(double*));
}

Prints something like the following:

["b":7FFD0104B100]
7FFD0104B100
1.5

Ali

Wyatt <wyatt.epp gmail.com> writes:

On Tuesday, 9 February 2016 at 03:49:11 UTC, Enjoys Math wrote:
 This:	
         double b = 1.0;

 	Variant[string] aa = ["b": &b];

 	writeln(aa["b"]);

 fails with:

 Error: cannot implicitly convert expression(["b":&b]) of type 
 double*[string] to VariantN!20u[string]

 Helps please!

I've found bugbears like this are distressingly common in 
std.variant.  Another one you might find yourself dealing with is 
https://issues.dlang.org/show_bug.cgi?id=10223, which applies to 
AAs as much as regular arrays.  It's actually why I stopped using 
it in favour of Adam Ruppe's arsd.jsvar.

-Wyatt