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From: Aleksey Gurtovoy (alexy_at_[hidden])
Date: 2002-03-14 10:59:05

I just want to remind everybody that the formal review for the Lambda
library by Jaakko Järvi and Gary Powell ends in five days. So far we haven't
seen actual votes for or against including the library in boost, so please,
post your comments!

> The formal review of Lambda Library by Jaakko Järvi and Gary
> Powell starts today, March 8th and runs through Wednesday, March 20th.
> The library is available at
> and also in the CVS under "lambda_development" branch (cvs
> update -r lambda_development boost/lambda libs/lambda).
> Below is an excerpt from the library's documentation:
> The Boost Lambda Library (BLL in the sequel) is a C++
> template library, which implements form of lambda
> abstractions for C++. The term originates from functional
> programming and lambda calculus, where a lambda abstraction
> defines an unnamed function. The primary motivation for the
> BLL is to provide flexible and convenient means to define
> unnamed function objects for STL algorithms. In explaining
> what the library is about, a line of code says more than a
> thousand words; the following line outputs the elements of
> some STL container a separated by spaces:
> for_each(a.begin(), a.end(), std::cout << _1 << ' ');
> The expression
> std::cout << _1 << ' '
> defines a unary function object. The variable _1 is the
> parameter of this function, a placeholder for the actual
> argument. Within each iteration of for_each, the function is
> called with an element of a as the actual argument. This
> actual argument is substituted for the placeholder, and the
> 'body' of the function is evaluated.
> The essence of BLL is letting you define small unnamed
> function objects, such as the one above, directly on the call
> site of an STL algorithm.
> For information about submitting a Formal Review, see
> The "Relation to other Boost libraries" section in the
> library documentation contains analysis of interaction
> between it, Boost.Bind and Boost.Function libraries, which
> might be particularly interesting to the authors of those two.
> Please be sure to say whether or not you think the library
> should be accepted by Boost.
> The Formal Review manager is Aleksey Gurtovoy.


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