toString refactor in druntime

[ketmar via Digitalmars-d]

On Mon, 27 Oct 2014 15:20:24 -0400
Steven Schveighoffer via Digitalmars-d <digitalmars-d at puremagic.com>
wrote:

> Might I suggest a helper that takes a sink and a variadic list of 
> strings, and outputs those strings to the sink in order.
hehe. simple CTFE writef seems to be a perfect fit for druntime. i
implemented very "barebone", yet powerful PoC in ~18Kb of code (~500
lines). it can be made even smaller if necessary. then one can use
something like `writef!"<%s:%5s>"(sink, msg, code);` and so on.
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