Implicit string lit conversion to wstring/dstring

[Alex Rønne Petersen]

On 14-03-2012 19:00, H. S. Teoh wrote:
> Code:
> 	import std.stdio;
> 	version(explicit) {
> 		void func(dstring s) {
> 			dstring t = s;
> 			writeln(t);
> 		}
> 	} else {
> 		void func(S)(S s) {
> 			dstring t = s;	// line 10
> 			writeln(t);
> 		}
> 	}
> 	void main() {
> 		func("abc");
> 	}
>
> If version=explicit is set, the program compiles fine. But if not, then
> the compiler complains:
>
> 	test.d:10: Error: cannot implicitly convert expression (s) of type string to immutable(dchar)[]
>
> What do I need to do to make the template version of func trigger
> implicit conversion of the string lit to dstring? What I'm trying to do
> is to templatize dstring as well, but still benefit from the
> string->dstring conversion when instantiated with dstring.
>
> (Ditto with implicit conversion to wstring.)
>
>
> T
>

I doubt that such an implicit conversion even exists. You have to prefix 
the string appropriately, e.g.:

string s = "foo";
wstring w = w"bar";
dstring d = d"baz";

-- 
- Alex