Here is the latest Caml Weekly News, for the week of May 04 to 11, 2010.
It is my pleasure to announce the new and second release for FoCaLiZe (the 0.6.0 FoCaLiZe opus). Apart from updating the external tools (Caml, Camlp5 and Coq) this release introduces inductive proofs on the representation of species. Zenon made impressive progress so as to be helpful in proving inductive properties for species. Distributed with this version, we also have a nice tutorial for the language and a set of additional examples. The 0.6.0 release is available from FoCaLiZe.inria.fr at http://FoCaLiZe.inria.fr/download/focalize-0.6.0.tgz Uncompress, extract, then read the INSTALL file in the newly created directory focalize.0.6.0 and follow the simple instructions written there. To join people and discussions write to firstname.lastname@example.org. Implementors also listen to suggestions and compliments at mail adress email@example.com. Enjoy. For the entire FoCaLiZe implementor group, Pierre Weis. Friday, May 7, 2010 10:36:44 What is it FoCaLiZe ? --------------------- FoCaLiZe is an integrated development environment to write high integrity programs and systems. It provides a purely functional language to formally express specifications, describe the design and code the algorithms. Within the functional language, FoCaLiZe provides a logical framework to express the properties of the code. A simple declarative language provides the natural expression of proofs of properties them from within the program source code. The FoCaLiZe compiler extracts statements and proof scripts from the source file, to pass them to the Zenon proof generator to produce Coq proof terms that are then formally verified. The FoCaLiZe compiler also generates the code corresponding to the program as an Objective Caml source file. This way, programs developped in FoCaLiZe can be efficiently compiled to native code on a large variety of architectures. Last but not least, FoCaLiZe automatically generates the documentation corresponding to the development, a requirement for high evaluation assurance. The FoCaLiZe system provides means for the developers to formally express their specifications and to go step by step (in an incremental approach) to design and implementation, while proving that their implementation meets its specification or design requirements. The FoCaLiZe language offers high level mechanisms such as inheritance, late binding, redefinition, parametrization, etc. Confidence in proofs submitted by developers or automatically generated ultimately relies on Coq formal proof verification. FoCaLiZe is a son of the previous Focal system. However, it is a completely new implementation with vastly revised syntax and semantices, featuring a rock-solid infrastructure and greatly improved capabilities.
Archive: http://groups.google.com/group/fa.caml/browse_frm/thread/9af0a0bd98c11b09#Jake Donham announced:
I am happy to announce the release of version 0.2 of the froc library for functional reactive programming in OCaml. There are a number of improvements: * better event model: there is now a notion of simultaneous events, and behaviors and events can now be freely mixed * self-adjusting computation (see http://ttic.uchicago.edu/~umut/projects/self-adjusting-computation/) is now supported via memo functions; needless recomputation can be avoided in some cases * faster priority queue and timeline data structures * behavior and event types split into co- and contra-variant views for subtyping * bug fixes and cleanup Development of froc has moved from Google Code to Github; see * project page: http://github.com/jaked/froc * documentation: http://jaked.github.com/froc * downloads: http://github.com/jaked/froc/downloads Thanks to Ruy Ley-Wild for helpful discussion, and to Daniel Bünzli for helpful discussion and many good ideas in React. You may be interested in this blog post describing the implementation: http://ambassadortothecomputers.blogspot.com/2010/05/how-froc-works.html I hope you find this work useful. Let me know what you think.
Thanks to Alp Mestan, we now include in the Caml Weekly News the links to the recent posts from the ocamlcore planet blog at http://planet.ocamlcore.org/. Uploaded sources of ocaml-semaphore to hg repository: http://forge.ocamlcore.org/forum/forum.php?forum_id=604 Make exploring large OCaml projects easy: http://www.wisdomandwonder.com/link/4773/make-exploring-large-ocaml-projects-easy Use Amazon SimpleDB with OCaml: http://www.wisdomandwonder.com/link/4769/use-amazon-simpledb-with-ocaml How froc works: http://ambassadortothecomputers.blogspot.com/2010/05/how-froc-works.html ocaml-semaphore: https://forge.ocamlcore.org/projects/ocaml-semaphore/ Hardware failure and phishing attacks: http://math.andrej.com/2010/05/04/hardware-failure-and-phishing-attacks/
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