• Tofu Ninja (12/12) Feb 14 2016 So I wrote a simple ref counted string type because using the
• =?UTF-8?Q?Ali_=c3=87ehreli?= (10/20) Feb 14 2016 The only way is to be explicit. Three common options:

Tofu Ninja <emmons0 purdue.edu> writes:

So I wrote a simple ref counted string type because using the 
built in strings without the GC is extremely painful. It there 
any way I can get strings to implicitly convert to my custom 
string type?

Some way to make this work...

struct rstring {...}
void fun(rstring s) {...}
...
fun("hello world"); // Currently an error

Would be super nice if it would just call the opAssign when 
trying to call fun but I suppose that has some non-obvious 
problems for why it does not work that way.

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

On 02/14/2016 03:43 PM, Tofu Ninja wrote:
 So I wrote a simple ref counted string type because using the built in
 strings without the GC is extremely painful. It there any way I can get
 strings to implicitly convert to my custom string type?

No, D does not support such implicit conversions.

 struct rstring {...}
 void fun(rstring s) {...}
 ...
 fun("hello world"); // Currently an error

 Would be super nice if it would just call the opAssign when trying to
 call fun but I suppose that has some non-obvious problems for why it
 does not work that way.

The only way is to be explicit. Three common options:

     fun(rstring("hello world"));
     fun("hello world".to!rstring);
     fun(cast(rstring)"hello world");

Relatedly, user defined types can provide implicit conversions through 
'alias this' but unfortunately, current implementation supports only one 
such operator.

Ali