How to convert this code: (is(ToString(t))

[Pablo via Digitalmars-d]

On Sunday, 8 May 2016 at 22:34:34 UTC, Peter Häggman wrote:
> On Sunday, 8 May 2016 at 18:55:58 UTC, Pablo wrote:
>> This is part of the old dparse.d file:
>>
>> private import std.string : ToString = toString ;
>>
>> 	char[] string()
>> 	{
>> 		static if(str)
>> 		{
>> 			static if(is(T == char[]))
>> 				return t;
>> 			else static if(is(ToString(t)))
>> 				return ToString(t);
>> 			else
>> 				return "<<"~T.stringof~">>";
>> 		}
>> 		else
>> 			return "<<"~T.stringof~">>";
>> 	}
>>
>> I have a problem with this part:  (is(ToString(t)) :
>> dparse.d(215): Error: function declaration without return 
>> type. (Note that constructors are always named 'this')
>>
>> How to fix this code?
>>
>> Regards
>> Pawel
>
> You must replace with
>
> "static if (is(typeof(to!string(t))));"

Thanks!
Pawel