On 07/14/2014 04:04 PM, H. S. Teoh via Digitalmars-d-learn wrote:
> On Mon, Jul 14, 2014 at 09:12:30PM +0000, Klb via Digitalmars-d-learn
wrote:
>> hello what is the right syntax for this:
>>
>> ----------------------------------------------------
>> import std.stdio, std.conv;
>>
>> void main(string args[])
>> {
>> ubyte[3] src = [0, 1, 2];
>> string trg = "";
>>
>> @property ubyte[3] srcAsProp(){return src;}
>>
>> // Error: template std.conv.to cannot deduce function from
argument types
>> // !(string)(ubyte[3]), candidates are:
>> trg = to!(string)(srcAsProp());
>> }
>> ----------------------------------------------------
>>
>> In a real-world application I'd use an intermediate value but I'd like
>> to know If it's possible...The strange fact is that it doesn't trig an
>> error if src is a dyn. array. (if you remove the 3 from [3] then it
>> passes).
>
> You need to slice the static array:
>
> trg = to!string(srcAsProp()[]);
There seems to be an attempt in Phobos to support it without needing an
explicit slice.
From std/phobos/conv.d:
/*
Converting static arrays forwards to their dynamic counterparts.
*/
T toImpl(T, S)(ref S s)
if (isRawStaticArray!S)
{
return toImpl!(T, typeof(s[0])[])(s);
}
@safe pure nothrow unittest
{
char[4] test = ['a', 'b', 'c', 'd'];
static assert(!isInputRange!(Unqual!(char[4])));
assert(to!string(test) == test);
}
I don't know why that overload does not take care of OP's case. (I am be
completely off here. :) )
Ali
