Please, tell me if one can write nested lambda expressions like " template<class Result, class Seq, class Elem> struct pairs: bm::fold<Seq, Result, bm::push_back<_1,bm::pair<Elem, _2 > > >{}; template<class Seq1, class Seq2> struct AllPairs: bm::fold<Seq1, bm::vector<>, pairs<_1,Seq2,_2> >{}; " without using intermediate metafunctions.
AMDG dilas dilas wrote:
Please, tell me if one can write nested lambda expressions like
" template<class Result, class Seq, class Elem> struct pairs: bm::fold<Seq, Result, bm::push_back<_1,bm::pair<Elem, _2 > > >{}; template<class Seq1, class Seq2> struct AllPairs: bm::fold<Seq1, bm::vector<>, 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. In Christ, Steven Watanabe
On Sat, Feb 20, 2010 at 1:21 PM, Steven Watanabe <watanabesj@gmail.com> wrote:
AMDG
dilas dilas wrote:
Please, tell me if one can write nested lambda expressions like
" template<class Result, class Seq, class Elem> struct pairs: bm::fold<Seq, Result, bm::push_back<_1,bm::pair<Elem, _2 > > >{}; template<class Seq1, class Seq2> struct AllPairs: bm::fold<Seq1, bm::vector<>, 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
AMDG OvermindDL1 wrote:
On Sat, Feb 20, 2010 at 1:21 PM, Steven Watanabe <watanabesj@gmail.com> wrote:
dilas dilas wrote:
Please, tell me if one can write nested lambda expressions like
" template<class Result, class Seq, class Elem> struct pairs: bm::fold<Seq, Result, bm::push_back<_1,bm::pair<Elem, _2 > > >{}; template<class Seq1, class Seq2> struct AllPairs: bm::fold<Seq1, bm::vector<>, 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
Umm, Phoenix may be a replacement for Boost.Lambda, but it doesn't replace Boost.MPL.Lambda. In Christ, Steven Watanabe
On Sat, Feb 20, 2010 at 6:09 PM, Steven Watanabe <watanabesj@gmail.com> wrote:
AMDG
OvermindDL1 wrote:
On Sat, Feb 20, 2010 at 1:21 PM, Steven Watanabe <watanabesj@gmail.com> wrote:
dilas dilas wrote:
Please, tell me if one can write nested lambda expressions like
" template<class Result, class Seq, class Elem> struct pairs: bm::fold<Seq, Result, bm::push_back<_1,bm::pair<Elem, _2 > > >{}; template<class Seq1, class Seq2> struct AllPairs: bm::fold<Seq1, bm::vector<>, 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
Umm, Phoenix may be a replacement for Boost.Lambda, but it doesn't replace Boost.MPL.Lambda.
Ah, mis-read, ignore me. ^.^
participants (4)
-
dilas dilas -
OvermindDL1 -
Steven Watanabe