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From: Greg Colvin (gcolvin_at_[hidden])
Date: 2000-11-17 13:45:08

I was just catching up on my reading and found an interesting paper in the
proceedings of the 2000 International Conference on Functional Programming
which looks relevant, to the small extent I understand it, to the similar
work here on Boost.

I found the following on the Web for those might care to check it out:

FC++ is a library for functional programming in C++. Functional
programming is a programming paradigm in which functions are treated as
regular values. Thus, we can have functions that take other functions as
parameters. The former functions are called "higher-order" functions. A
common feature of functions is that they can be polymorphic. "Polymorphic"
means that the same function can be used with arguments of many types.
FC++ is distinguished from other libraries (including the C++ Standard
Library) by its support for rank-2 polymorphism: FC++ polymorphic higher-
order functions can take other polymorphic functions as arguments and
return polymorphic functions as results. This is particularly useful
(i.e., simplifies code) in C++ where type inference is limited and we
often need to pass polymorphic functions around and determine their type

With FC++ you can define your own higher-order polymorphic functions, but
the library also contains a large amount of functionality that can be re-
used as-is in C++ programs. This includes infinite ("lazy") lists, useful
higher-order functions (like map, compose, etc.), a reference-counting
facility that can be used to replace C++ pointers, many common logical and
arithmetic operators in a form that can be used with higher-order
functions, and more.

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