How do I encode to a writer in 0.4?

[dpc]

There used to be write_hex that encoded straight into Writer, but now it's gone and I'm not sure what's the most idiomatic way to replace it without temporarily allocation.

[KokaKiwi]

Uhh yeah since 0.4 hex uses "from-iterator" types for encoding result and thus doesn't support to encode directly to Writer any more :x
This "ability" will most surely come back in later versions (cf #37) but for now yeah there's sadly no way without allocating beforehand :(

I'll tag this issue as "bug" or something in order to have it somewhere for the "1.0" milestone