syntax for calling to with a getter as source argument

[H. S. Teoh via Digitalmars-d-learn]

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()[]);

Or, if you like to use UFCS (Uniform Function Call Syntax):

	trg = srcAsProp()[].to!string;

You might want to file an enhancement request to improve the error
message, though -- it's not very helpful as it stands.


T

-- 
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