Giovanni Piero Deretta wrote:
As I said elsewere, the extra round is hidden when lambda is used to protect a nested expression, but it shows when used a top level:
lambda[ for_each(arg1, lambda(_a = arg2)[push_back(arg1, _a)])] () (r, i);
There is really really no need for the extra '()' there. There are no local variables in the outer lambda and even if there were, the user can initialize them with lambda(/* init here*/)[...]
Ok, this I agree. Again, if you read my earlier post on the plan to unify these, this is actually my intention: ... Oh my, there's a lot of discussion I can't find that snippet of information. Anyway, it has something to do about using the "let" semantics be applied to "lambda" only on the top level. I think it will work with the lambda syntax and behavior you sought for. Regards, -- Joel de Guzman http://www.boostpro.com http://spirit.sf.net