Design with appender: good or bad?

[Chris]

On Thursday, 10 April 2014 at 11:40:46 UTC, monarch_dodra wrote:
> On Thursday, 10 April 2014 at 10:16:43 UTC, Chris wrote:
>> because the two are not the same. When you print MyStruct to 
>> console you get the address of appender buf, whereas when you 
>> use string[] items you get the actual items. I'm only 
>> wondereing if using appender is potentially dangerous and 
>> could bite me later.
>
> Why don't you implement "toString" on your type?
>
>   void toString(scope void delegate(const(char)[]) sink)
>   {
>       import std.format;
>       formattedWrite(sink, `%s`, "MyStruct(");
>       formattedWrite(sink, `"%s"`, name);
>       formattedWrite(sink, `%s`, ", ");
>       formattedWrite(sink, `%s`, buf.data);
>       formattedWrite(sink, `%s`, ")");
>   }

Thanks. But the question was not about how to print it to 
console, but whether there are any hidden dangers in using 
Appender in this way, like the one Rene mentioned.