Re: [Boost-users] [mpl] nested lambdas?

10 Oct 2005


      Geoffrey Romer writes:
...
On 10/5/05, Aleksey Gurtovoy  wrote:
...
Geoffrey Romer writes:
...
Suppose I'm tying to build a nested lambda expression, like so
(typename...::type omitted for simplicity):
lambda >, _2> >
...
- Does the _1 refer to the first argument of the inner lambda, or of
the outer lambda?
The outer one.
Is that also true if the inner lambda were a bind?
No, bind expressions are passed through 'lambda' untouched. From
http://cvs.sourceforge.net/viewcvs.py/boost/boost/libs/mpl/test/apply.cpp?rev=1.5&view=markup:

    MPL_TEST_CASE()
    {
        typedef bind2,_1,_1> b1;
        typedef lambda<b1>::type b2;
        MPL_ASSERT(( is_same< b1,b2 > ));
    }

HTH,
-- 
Aleksey Gurtovoy
MetaCommunications Engineering