-----Original Message----- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Stjepan Rajko Sent: 13 August 2008 14:59 To: boost@lists.boost.org Subject: [boost] [fusion][parameter] a solution for named parameters /parameter packs using fusion maps
I just realized that named parameters can be implemented rather nicely using fusion maps (I'm not sure whether this has been explored before). I threw together an implementation for two particular parameters/names, but the method could be easily generalized. Here are examples of functions taking parameter packs
<snip> This looks neat and feels C++-ish (rather than IBM JCL - but you're too young to remember that ;-) Jake Voytko and I concluded similarly when developing Scale Vector Graphics PLotting user interface where there are hundreds of possible functions (x_axis_color(red), point_color(green)...). (Watch this space for a enhanced and possibly useable version). Chaining calls is convenient because you don't need to remember the order. The compile time seemed a little better too compared to Boost.Parameter, and the setup more intuitive (C++y rather than macros). Since it now clear that named parameters are not going to in the C++ language proper, I believe that this is best idiom to use. Despite being unfamiliar, chaining is obvious once you get going with it. Paul --- Paul A Bristow Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB +44 1539561830 & SMS, Mobile +44 7714 330204 & SMS pbristow@hetp.u-net.com