On 11/10/2010 8:46 AM, Eric Niebler wrote:
On 11/2/2010 8:23 AM, Joel de Guzman wrote:
On 11/2/2010 12:22 PM, Eric Niebler wrote:
Given an mpl::vector of keys, and a fusion::vector of values, what's the easiest way to create a fusion::map?
Nobody ever answered this one. It's ok, my immediate need has passed. I'm just curious if there's an easy way that I missed.
The easy and obvious way is the one that you described below. It's a deficiency of Fusion that it's not doable this way as it should be. IOTW, there's no straightforward way ATM.
The obvious solution of just zipping the two sequences and passing the result to fusion::as_map doesn't work because as_map (somewhat narrowly) requires all elements to be fusion::pair, and Fusion's zip algorithm produces sequences of vector2. I'd like to see this generalized so that (a) as_map only requires sequences of 2-tuples and (b) fusion::pair meets the requirements for 2-tuples.
Makes perfect sense. Do you have a patch?
Sorry, no. I filed a feature request, instead.
Thanks, Eric. Regards, -- Joel de Guzman http://www.boostpro.com http://spirit.sf.net