A few folks have asked me about building EDSLs in Haskell for assembly
programming, so I've posted an example of the approach we have had success
using at BAE Systems.
It's a bit rough, so if anyone's motivated to polish it up, by all means.
https://github.com/tomahawkins/asm-dsl-example/
Hi,
BAE Systems has some open positions for principal level Haskell
programmers with compiler experience. Our DARPA project[1] is
building a compiler for a new programming language with dynamic
information flow control, targeting a custom ISA with hardware
enforced information security. On the
Let's say I have:
data T0
data T1
data T a where
A :: T T0
B :: T T1
Then I can write the following without getting any non-exhaustive
pattern match warnings:
t :: T T0 - String
t a = case a of
A - A
However, if I use type classes to constrain the constructors, instead
of using the
Hi,
Can someone provide guidance on how handle operator precedence and
associativity with Polyparse?
Thanks in advance.
-Tom
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Can someone provide guidance on how handle operator precedence and
associativity with Polyparse?
Do you mean parsing something like 1 + 2 * 3 ? I don't think
there's any real difference in using Polyparse vs Parsec for this,
except for doing p `orElse` q rather than try p | q.
Actually, I
Mecha [1,2] is a constructive solid geometry (CSG) modeling language
embedded in Haskell.
This release adds OpenSCAD [3] as a backend target. OpenSCAD is a
solid modeling DSL and a viewer. OpenSCAD uses OpenCSG [4] for
rendering, which directly renders CSG objects with OpenGL without the
need
On Sun, Jun 5, 2011 at 10:41 AM, Andrew Coppin
andrewcop...@btinternet.com wrote:
On 04/06/2011 08:25 PM, Tom Hawkins wrote:
What is the easiest way to generate polygon meshes from constructive
solid geometry? Marching cubes [4] seems pretty involved.
As I understand it, this is a Very Hard
Mecha [1,2,3] is a constructive solid modeling DSL. I haven't worked
on Mecha in awhile, so this release just contains some minor cleanup
and reorganization.
My next step is to build an OpenGL interactive visualization tool,
something like a basic CAD window to rotate and zoom around 3D models.
ImProve is a Haskell eDSL for embedded control systems -- we use it
for automotive and off-highway powertrain control.
I've started writing a tutorial for ImProve. So far it has a basic
tour of the language and a handful of examples. Comments and
suggestions are welcome.
In other recent news,
ImProve [1] is an imperative DSL for hard realtime embedded
applications. ImProve programs are verified with infinite
state,unbounded model checking (k-induction, invariant strengthening,
SMT). In addition to C, ImProve now supports Simulink [2] as a
backend target. Simulink is a popular
I am curious -- how easy is it to use theoremquest for playing with
equational theories?
Let me turn the question around: How easy is it to play with
equational theories in HOL Light? Because this is the planed basis
for TheoremQuest.
-Tom
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I have been wanting to gain a better understanding of interactive
theorem proving for some time. And I've often wondered: Can theorem
proving be made into a user-friendly game that could attract mass
appeal? And if so, could a population of gamers collectively solve
interesting and relevant
I find this fairly interesting. Once you're finished grappling with the
logical core, I wouldn't mind helping out with a web interface, time
permitting. I suspect attracting mass appeal, or getting users at all, is
helped massively by having a web interface.
Thanks for your interest. Yes, a
But what I miss when using these proof assistants, and what I have my
eyes on, is a way to Search ALL The Theorems. In current proof
assistants, developments are still distributed in packages -- and a
particular development might have already proved a very useful lemma
that wasn't the main
I want to create a simple browser game using Haskell. It would be
nothing complicated: basic 2D graphics, limited sound, and minimal
network traffic.
What is the recommended medium? Flash or JavaScript+SVG?
Any recommended Haskell libraries for the server-side logic or client
code generation?
ImProve [1] is an imperative DSL for high assurance, embedded
applications. This release includes a new compositional proof
framework where users can leverage previously proved theorems to aid
the proof of new theorems. This new addition was inspired from
discussions with Lee Pike [2].
Lee also
CIL (C Intermediate Language) [1], not to be confused with the Common
Intermediate Language, is a mature OCaml library that parses and
reduces C programs down to a simplified subset of the C language,
making it easier to analyze and compile C programs. This library [2,
3] parses these results,
1. Wow that's cool.
Indeed.
2. Is this technology not patented by Digital Fountain? (now Qualcomm?)
I'm sure it is. This library is a naive implementation of LT codes,
which have nowhere near the performance of Digital Fountain's Raptor
codes.
I remember when I first heard of fountain
On Tue, Oct 19, 2010 at 7:54 AM, Patai Gergely
patai_gerg...@fastmail.fm wrote:
I have nearly the same plan: I want to compile a restrictive form of
Haskell to constant time and space C code for hard realtime embedded
targets. Except I need a top level monad with different semantics
than IO.
How do I profile cabal libraries?
I cabal install -p a local package I am testing, and I compile a
test of the library using -prof -auto-all. But the profiling report
only lists a CAF entry for the library, but does not detail any of the
library's top level functions.
What am I doing wrong?
This library [1] implements a fountain code [2]. Fountain codes are
forward error correction codes for erasure channels [3]. A fountain
code encodes a message into an infinite stream of packets --
transmitters generate message packets at random, on-the-fly. To
reconstruct the message, receivers
Yes, that would be the basic idea:
1. Compile the Haskell metaprogram.
2. Evaluate main, possibly with a timeout, in a way that keeps all its
structure including lambdas accessible (e.g. Core).
3. Compile the resulting program with other tools.
What is this different tool and how does it
I'm having trouble installing Haskell Platform on Windows. After the
install, I run cabal update, which appears to work: 00-index.tar.gz
is deposited in C:/Documents and Settings/user/Application
Data/cabal/packages/hackage.haskell.org. However, when I try to
cabal install anything, I get:
Classic pilot error. I had an old cabal.exe on the search path.
-Tom
On Tue, Oct 5, 2010 at 8:09 PM, Tom Hawkins tomahawk...@gmail.com wrote:
I'm having trouble installing Haskell Platform on Windows. After the
install, I run cabal update, which appears to work: 00-index.tar.gz
is deposited
Has anyone in the STM community considered the ability to read a TVar,
such that it would allow the transaction to complete even if the TVar
was modified by another transaction? (I am assuming this is not how
STM works by default.) For example:
looselyReadTVar :: TVar a - STM a
Atom [1] has
Thanks for the responses, but I think I should explain a bit more.
I'm not interested in being able to read the live value of a TVar at
any arbitrary time (via. unsafeIOToSTM). But rather I would like
looslyReadTVar to have exactly the same semantics as readTVar, except
that the STM runtime would
On Tue, Sep 28, 2010 at 6:44 PM, Serguey Zefirov sergu...@gmail.com wrote:
2010/9/29 Tom Hawkins tomahawk...@gmail.com:
In the embedded domain, this could be a fault monitor that
reads a bunch of constantly changing sensors.
I think that sensor reading belongs to IO, not STM.
Sensors would
A few years ago I attempted to build a Haskell hardware compiler
(Haskell - Verilog) based on the Yhc frontent. At the time I was
trying to overcome several problems [1] with implementing a hardware
description language as a light eDSL, which convinced me a proper
compiler may be a better
On Tue, Sep 28, 2010 at 9:20 PM, Shakthi Kannan shakthim...@gmail.com wrote:
If you are still at it, you can have a look at Chalmers Lava [1], or
Kansas Lava [2].
Feldspar [3] project targets DSP though.
These are examples light embedded DSLs, i.e. sophisticated libraries
where you compile,
Hi,
Often I need to assemble a tree from things with unstructured
hierarchical paths. I built a function [1] to do this for ImProve.
But does a library already exist that does this? If not I may create
one, as I need it for a few different libraries.
data Tree a b = Branch a [Tree a b] | Leaf
Oh, one thing I should mention is that there are a few Haskell DSLs for
generating embedded C now:
* Atom http://hackage.haskell.org/package/atom
* Feldspar http://hackage.haskell.org/package/feldspar-language
* cmonad http://hackage.haskell.org/package/cmonad
* Copilot
This package is a collection of programs that we use at Eaton to
interact with, debug, and analyze data from vehicle ECUs (Electronic
Control Unit: automotive speak for an embedded computer). The
motivation to put this stuff on hackage is to encourage the use of
Haskell in automotive electronics
Anyone in the Haskell community interested in content-centric
networking? Van Jacobson has done a couple of great presentations to
introduce CCN [1, 2]. Personally, I find it fascinating what kind of
doors could open if we got away from TCP/IP, especially for wireless
ad-hoc networking.
Parc
ImProve [1] is a imperative programming language for high assurance
applications. Using Yices [2], ImProve verifies programs will always
adhere to assertion specifications, irrespective of program input. If
it is possible for an assertion not to be upheld, ImProve will emit a
counter example in
Hi,
ImProve [1] is a little imperative DSL that compiles to C code.
Intended for high assurance embedded applications, ImProve is also an
infinite state, unbounded model checker. Meaning ImProve can verify
assertions in a program will always be true. Here's an example:
module Main where
Good, we need more functional programmers actually solving real
problems. But please put your skills to work in an industry other
than investment banking.
I've received a lot mail on this comment; mostly positive. Here's one
from someone who wishes to remain anonymous:
First of all I would
On Mon, Aug 9, 2010 at 12:06 PM, Lennart Augustsson
lenn...@augustsson.net wrote:
But do you think there would be more Haskell jobs offered (in absolute
terms), if no investment firms offered jobs?
Is there some kind of quota of job offers that gets used up?
No and no. Again, I think it's
Hi Eil,
Sorry, your email got lost in my inbox. I hope you don't mind me
copying haskell-cafe.
I saw a video of a presentation you gave at CUFP awhile back and was
hoping to ask you a couple of questions.
I'm currently a junior at UT Dallas and trying to figure out what I'm
going to do
On Mon, Jul 19, 2010 at 11:54 AM, Stephen Tetley
stephen.tet...@gmail.com wrote:
Hi Tom
This will the job for a UserHooks - probably preBuild? - see
Distribution.Simple.UserHooks.
postConf - Hook to run after configure command
preBuild - Hook to run before build command. Second arg
I have a script I'm using to generate some Haskell code for a library.
How do I specify this flow in the cabal setup file? Would someone
point me to a relevant library I can reference as an example?
-Tom
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smt-lib [1] is a library for reading and writing SMT-LIB [2] files via
Haskell. SMT-LIB is a common language and benchmark suite used by
most SMT solvers.
Currently the library supports the full SMT-LIB version 2 syntax.
However at this time, only command scripts -- not responses -- can be
Statechart [1] is a program that compiles Rhapsody [2] statechart
diagrams [3] into C. Rhapsody is a UML cough, choke, gag... tool
from IBM intended for embedded systems development. If you use
Rhapsody, and its code generator makes your eyes bleed, statechart may
provide some relief.
-Tom
[1]
A little library for reading s-record files:
http://hackage.haskell.org/package/srec
-Tom
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On Tue, Jun 22, 2010 at 9:08 PM, Ivan Miljenovic
ivan.miljeno...@gmail.com wrote:
For those others like me who have no idea what s-record files are:
http://en.wikipedia.org/wiki/S-record
Sorry, I should have been more clear. In embedded systems
development, s-records are typically used to hold
2010/6/21 Maurício CA mauricio.antu...@gmail.com:
Hi, all,
bitspeak is a small proof of concept application that allows
writing text using only two commands (yes/no, 1/2, top/down etc.).
It is intended to show how people with disabilities similar to
Stephen Hawking's (i.e., good cognitive
For instance, the LLVM.FFI.BitReader module has some functions that'll get
you a ModuleRef from some bitcode.
getBitcodeModuleInContext :: ContextRef - MemoryBufferRef - Ptr
ModuleRef - Ptr CString - IO Bool
type ModuleRef = Ptr Module
data Module
I'm confused how this works. How does
Is there any work being done to read LLVM object code into Haskell?
I've looked through the llvm library [1], but it appears focused on
code generation.
-Tom
[1] http://hackage.haskell.org/package/llvm
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On Mon, May 24, 2010 at 2:34 AM, Graham Klyne gk-li...@ninebynine.org wrote:
I think this looks like an interesting idea... can you provide a pointer to
a description of the DSL/API itself?
Unfortunately, there's not much aside from the Haddock documentation
[1] [2] and some misc links on my
Atom [1] is an Haskell DSL for hard realtime embedded programming.
This release adds 'exactPhase' to precisely control the phasing of
Atom rule executions. This patch was contributed by Lee Pike.
BTW, I created a google group [2] for discussions related to the use
for functional programming in
CIL [1] is an OCaml library that parses and compiles C down to a
simplified subset to ease different forms of static analysis. Frama-C
[2] augments CIL with a property specification language (ACSL), which
can capture design contracts for C functions. Frama-C's Jessie plugin
uses the Why [3]
I got the GADT
data DataBox where
DataBox :: (Show d, Eq d, Data d) = d - DataBox
[snip]
but I can't figure out how to implement gunfold for DataBox.
The error message is
Text/XML/Generic.hs:274:23:
Ambiguous type variable `b' in the constraints:
I had a similar difficultly in
On Thu, May 13, 2010 at 11:58 AM, Stephen Tetley
stephen.tet...@gmail.com wrote:
Hi Tom
Quite a while ago I interfaced Haskell and Ocaml/CIL through both
ATerms and ASDL pickles.
I can look at digging out this code if you like - it was fairly
complete, but it had a bug somewhere and will
In fact, if you just want
Read-like functionality for a set of Haskell datatypes, use polyparse: the
DrIFT tool can derive polyparse's Text.Parse class (the equivalent of Read)
for you, so you do not even need to write the parser yourself!
Cabal install DrIFT-cabalized complains. What is the
The tarball was missing its Rules.hs; as it happens, GHC has a module
named Rules.hs as well, hence the confusing error. I've uploaded a
fresh one that should work.
Thanks. This builds and installs fine.
But I think there is something wrong with the generated parser. It
doesn't look for
On Sun, May 9, 2010 at 12:54 AM, Lee Pike leep...@gmail.com wrote:
Tom,
Have you used any of these tools? They're pretty cool. I'd be
interested to hear you opinion.
http://frama-c.com/
Not yet. We were considering using them for a C security-analysis, but
rolled-our-own stuff in
On Sun, May 9, 2010 at 3:36 AM, Malcolm Wallace
(Declaration of interest: I wrote polyparse.)
Yes, I used polyparse in the VCD library. It rocks!
I'll check out the DrIFT tool.
Thanks.
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I have a lot of structured data in a program written in a different
language, which I would like to read in and analyze with Haskell. And
I'm free to format this data in any shape or form from the other
language.
Could I define a Haskell type for this data that derives the default
Read, then
I just started using Frama-C [1] for analyzing some of our embedded C
programs. Pretty awesome suite of tools. Especially its ability to
describe and verify function contracts with ACSL [2]. The tool suite
is primarily build with OCaml.
Has anyone considered building a Haskell interface to
I had been using Parsec to parse VCD files, but needed to lazily parse
streaming data. After stumbling on this thread below, I switch to
polyparse.
What a great library! I was able to migrate from a strict to a
semi-lazy parser and many of my parse reductions didn't even need to
change. Thanks
I have a bunch of global variables in C I would like to directly read
and write from Haskell. Is this possible with FFI, or must I write a
bunch of C wrapper functions for the interface, i.e. a 'get' and a
'set' for each variable?
I'm building a simulator for one of our embedded systems. The C
The release adds a simple VCD parser (via Parsec) and minor changes to
the VCD generation API.
http://hackage.haskell.org/package/vcd
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I uploaded a small library [1] for generating VCD files [2], which can
be viewed with waveform tools like GTKWave [3]. Though VCD is
commonly associated with Verilog simulation, at Eaton we use it to
visualize vehicle data in realtime: data is pulled off the CAN bus,
formated to VCD, then piped
http://tomahawkins.org/Pictures/2010
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On Mon, Apr 5, 2010 at 4:00 AM, Heinrich Apfelmus
apfel...@quantentunnel.de wrote:
Does it scale? Absolutely, spec2code is not confined to
specifications for which optimized algorithms are already known.
spec2code can be used to implement operation systems, device drivers,
build systems,
On Fri, Apr 2, 2010 at 2:28 PM, Vasili I. Galchin vigalc...@gmail.com wrote:
Sorry for no Subject on the first post. In any case, I meant this
Wall Street Journal as a challenge to the Haskell community to perhaps
step up to the plate in the auto arena vis-a-vis software
correctness. I realize
On Tue, Mar 30, 2010 at 7:30 PM, Aaron Tomb at...@galois.com wrote:
Hello,
I'm wondering whether there's anyone on the list with an interest in doing
additional work on the Language.C library for the Summer of Code. There are
a few enhancements that I'd be very interested seeing, and I'd love
unlikely this project will reach that
level of maturity, but you never know.
-Tom
Warren
On Tue, Mar 9, 2010 at 10:35 PM, Tom Hawkins tomahawk...@gmail.com wrote:
Here is a new library for analyzing PowerPC programs [1]. At this
point it does instruction set simulation on machine code
Here is a new library for analyzing PowerPC programs [1]. At this
point it does instruction set simulation on machine code -- and not
all instructions are implemented yet, BTW.
To run a simulation, the user defines an instance of the Memory class
[2] to represent both instruction and data
On Wed, Mar 3, 2010 at 7:15 AM, Ivan Miljenovic
ivan.miljeno...@gmail.com wrote:
On 3 March 2010 16:11, Tom Hawkins tomahawk...@gmail.com wrote:
-Wall only complains about shadow bindings, defined but not used, and
no type signature. But no unmatched patterns.
Yes it does: one of the options
On Wed, Mar 3, 2010 at 7:24 AM, Alexander Dunlap
alexander.dun...@gmail.com wrote:
On Tue, Mar 2, 2010 at 9:06 PM, Tom Hawkins tomahawk...@gmail.com wrote:
How do I track down an reference to an undefined value? My program
must not be using a library correctly because the program makes
How do I track down an reference to an undefined value? My program
must not be using a library correctly because the program makes no
direct use of 'undefined'. Running with +RTS -xc yields:
GHC.Err.CAFTest: Prelude.undefined
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On Wed, Mar 3, 2010 at 6:11 AM, Tom Hawkins tomahawk...@gmail.com wrote:
On Wed, Mar 3, 2010 at 6:07 AM, Ivan Miljenovic
ivan.miljeno...@gmail.com wrote:
On 3 March 2010 16:06, Tom Hawkins tomahawk...@gmail.com wrote:
How do I track down an reference to an undefined value? My program
must
Atom is a Haskell DSL for designing hard realtime embedded software.
The 1.0 release is meant to indicate some level of stability; most of
the core has been unchanged for quite some time.
That said, there are a few interesting changes in 1.0. First the var'
family of variable declarations
On Sun, Feb 14, 2010 at 1:30 AM, Yves Parès limestr...@gmail.com wrote:
I've been interested in using Atom since I saw this:
http://blog.sw17ch.com/wordpress/?p=84
However those samples are very outdated, do you have newer ones?
Unfortunately, no. I wish I had the time to write Atom examples
AFV is an infinite state model checker to verify assertions in
embedded C programs.
New in this release:
- Starts analysis from 'main' entry point. Automatically identifies
the main loop (for (;;), while (1)).
- Better counter example generation.
- Enforces stateless expressions.
On Thu, Jan 21, 2010 at 4:07 PM, Mark Lentczner ma...@glyphic.com wrote:
On Jan 20, 2010, at 10:09 AM, Tom Hawkins wrote:
I'm looking for an elegant way to generate a list of all pruned trees
where each pruned tree has one of its leaves removed.
This turned out to be a thornier problem than I
I'm looking for an elegant way to generate a list of all pruned trees
where each pruned tree has one of its leaves removed. Something like
this:
data Leaf = ...
data Tree = Leaf Leaf | Branch [Tree]
prunedSubTrees :: Tree - [(Leaf, Tree)]-- [(the leaf removed, the
pruned tree)]
Any
On Tue, Jan 19, 2010 at 10:42 PM, Lee Pike leep...@gmail.com wrote:
Tom,
Is this a bug? The following program compiles, but the rule is scheduled at
period 1 (rather than 0). I wouldn't have thought to have an assignment
outside of an atom until another engineer here wrote it. In any
This release of AFV adds counter example generation for both concrete
bounded violations or for inconclusive results when the induction
fails to converge. I also put Linux and Windows binaries here:
http://tomahawkins.org/.
http://hackage.haskell.org/package/afv
-Tom
AFV is an infinite state model checker for simple, iterative C
programs. This release adds some new name checks, a few minor bug
fixes, basic support for functions, and a little stronger type
checking. Though most of the C language is still not supported, it
can verify a lot of interesting
On Sun, Jan 17, 2010 at 1:16 PM, miaubiz miau...@gmail.com wrote:
I am trying to generate a square wave. Here's the code:
square - bool square False
period 2 $ atom square high $ phase 0 $ do
square == true
assert square is low $ not_ $ value square
period 2 $
Hi,
Here is the first release of Atom's Formal Verifier (AFV) [1], a tool
intended to verify Atom -- or human -- generated C code. With the
help of the Yices SMT solver [2], AFV uses bounded model checking and
k-induction to verify assertions in iteratively called C functions,
such as an
On Tue, Jan 5, 2010 at 7:05 PM, CK Kashyap ck_kash...@yahoo.com wrote:
Hi Tom,
Happy new year :)
I was wondering if I could use Atom for the purpose of an x86 operating
system generator?
Hi Kashyap,
Ironically Atom was intended to eliminate the need for operating
systems -- at least on
One argument for option 2 is to carry forward datatypes to the target
language. For example, if you want to describe a state machine with
the state as a type:
data StopLightState = Red | Yellow | Green
With option 1, values of type StopLightState will be resolved at
compile-time, not run-time.
On Mon, Jan 4, 2010 at 9:41 PM, Luke Palmer lrpal...@gmail.com wrote:
On Mon, Jan 4, 2010 at 12:16 PM, Tom Hawkins tomahawk...@gmail.com wrote:
One argument for option 2 is to carry forward datatypes to the target
language. For example, if you want to describe a state machine with
the state
On Sun, Jan 3, 2010 at 9:15 AM, Jason Dusek jason.du...@gmail.com wrote:
I would like to know how the `__global_clock' influences
execution in the present system.
As you observed, __global_clock is no longer used for rule scheduling.
It is only there to provide a time reference. BTW,
I have a large tarball I want to link into an executable as a
ByteString. What is the best way to do this? I can convert the
tarball into a haskell file, but I'm afraid ghc would take a long time
to compile it. Is there any way to link constant data directly with
ghc? If not, what's the most
On Fri, Jan 1, 2010 at 4:43 AM, Jason Dusek jason.du...@gmail.com wrote:
I'm working with Atom to program an ATtiny25. I am curious
about how consistent the timings actually are.
The function returned by Atom is intended to be called periodically,
preferably using some hardware timer, like
Thanks, this worked great. Just a few seconds to link in a 5M
tarball. Details:
test.s:
.global test_data
test_data:
.byte 0
.byte 1
.byte 2
...
Foo.hs:
import Foreign
import Data.ByteString.Internal
import Data.Word
import System.IO.Unsafe
foreign import ccall test_data :: Ptr Word8
Jon,
I haven't tried GHC 6.12 or the Haskell Platform yet, but here is our
standard install procedure for our company, which has worked
consistently for us since GHC 6.8 (we use ubuntu 9.04 32-bit):
- Add ~/.ghc/bin and ~/.cabal/bin to PATH.
- Download and extract latest ghc. Then from
A bug fix affecting floating point variable initialization.
http://hackage.haskell.org/package/atom
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Today we were working on integrating Atom code with some hand-written
C, and one of my colleagues posed the question: Is it possible to use
Atom just for its task scheduler for existing C code? This turns out
to be very simple. It just requires a few combinators built on top of
'action'.
--
On Tue, Dec 8, 2009 at 6:54 PM, Tom Tobin korp...@korpios.com wrote:
On Tue, Dec 8, 2009 at 11:09 AM, siki ga...@karamaan.com wrote:
You should have at least a bachelor’s degree in computer science from a top
university
Might I humbly suggest that this is going to severely limit your
hiring
On Fri, Nov 27, 2009 at 9:30 PM, John Hughes r...@chalmers.se wrote:
This is a heads up about a workshop on test automation that I just joined
the programme committee of. Automation of Software Test will be co-located
with ICSE in Cape Town in May--the workshop home page is here:
On Fri, Nov 27, 2009 at 9:30 PM, John Hughes r...@chalmers.se wrote:
This is a heads up about a workshop on test automation that I just joined
the programme committee of. Automation of Software Test will be co-located
with ICSE in Cape Town in May--the workshop home page is here:
This release of Atom slightly changes the semantics of assertions and
coverage. Assertion and coverage are now checked between the
execution of every rule, instead of only when the rules containing
assertions are fired. They are still subject to parental guard
conditions, but not period or phase
On Tue, Dec 1, 2009 at 2:24 AM, Lee Pike leep...@gmail.com wrote:
Tom,
I have a (hopefully) easy question about timing and Atom in the use-case
where you're handling all your own scheduling without relying on a RTOS
(where you get preemption). Suppose I want a rule to fire every 2ms.
We finally got some open reqs in Eaton's engineering center in Pune,
India. Could involve a little Haskell programming, or a lot,
depending on what you want to do.
= int16' readCompass() = (return . value)
something - int16' something
period 1 $ atom navigate $ do
heading - compass
something == heading
br, miaubiz
Tom Hawkins-2 wrote:
The work around is to assign the result to an external variable. The
drawback is the result will not be available
On Fri, Nov 27, 2009 at 12:09 PM, Serge Le Huitouze
serge.lehuito...@gmail.com wrote:
Hi Tom!
Mecha is a little constructive solid modeling language intended for 3D
CAD. This release adds animation capabilities, which use POVRay and
FFmpeg behind the scenes. At work we've used Mecha to
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