Re: [Boost-users] MPL. Nested Lambdas

On Sat, Feb 20, 2010 at 1:21 PM, Steven Watanabe wrote:

AMDG

dilas dilas wrote:

...

Please, tell me if one can write nested lambda expressions like

" template struct pairs: bm::fold > >{}; template struct AllPairs: bm::fold, pairs<_1,Seq2,_2> >{}; "

without using intermediate metafunctions.

This ought to work, since the placeholders in AllPairs will be expanded before pairs is ever invoked.

I do not know about Lambda, but I know that you can create sub-functors in phoenix just fine, it has specific constructs for that too. If you do not know, Boost.Phoenix is a complete replacement for Boost.Lambda, plus a lot more. http://www.boost.org/doc/libs/1_42_0/libs/spirit/phoenix/doc/html/index.html