-kcg: evaluates types enum and struct correctly.
-kcg: evaluates const correctly.

  More precisely, a node that has memory ougth to be declared using
  "node", and using "function" otherwise.

  Moreover, a node that performs side-effects (i.e., if it calls an
  extern node that performs side effects) ougth to be declared as
  "unsafe".

  Safe/unsafe mismatches raise an error.

  Memory mismatches raise an error in one way (a "function" that uses
  memory), and a warning in the other way (a "node" that uses no
  memory).

Also fix some errors done when transmitting the unsafe flag (well, it's
the first time I use it!).

Report by willie (cf mail of 8/10/2014 to get the file)

file:/tmp/modes3x2.lus

lus2lic -esa -en -2c /tmp/modes3x2.lus -n modes3x2

But it gives an error of:
Error. in file "/mnt/A/wsept/modes3x2_pre_orig_lus2lic_en_esa/modes3x2.lus",
line 74, col 8 to 8, token '#': only one operator per equation is allowed
(v04_0, v04_1).

Which is the line:
assert #(on_off, toggle);

-----------------------------------------------------------------

Actually, refuse programs that uses "#" or "nor" run with -esa and
-2c|-exec

That means that willie program is now rejected.

Nevertheless, that change migth fix some other programs (that uses
arrays, and used with -esa and -exec or -2c).

The translation was faithfull to the comment, but the comment was wrong :
in order to translate a condact, we need clocks (when) !

node condact_toto(i0:bool; i1:int; i2:int) returns (o0:int) = Lustre::condact<<toto, 0>>;

is now translated into:

condact_toto(i0:bool; i1:int; i2:int) returns (o0:int)
let
  o0 = if i0 then current(toto(i1 when i0, i2 when i0) ) else (0 fby o0);
tel

nb : the -exec mode was working because I did not use the generated soc,
which was completely wrong.

Note that to do that, I have modified the CURRENT variant of
Lic.val_exp, to attach it the clock the current holds on. Indeed, the
clock is mandatory to generated correct code...

In an ideal world, this clock information may have explicitely been
set by the user ("current(clk_of_X,X)" instead of "current(X)"), but
for historical reason, it is not the case.

Hence, this information is added as soon as it is available, namely,
during clock checking.

# of unexpected failures	101->109

but actually, some new test passes causes several other failing test
to be tried, so it is not really a regression.

It generates C code that compile on at least one example.

The rationale is to avoid local vars blow-up on some
examples. Indeed, the generated oracle blows-up (e.g., on left.lus)
if we execute it via v4, whereas via v6 it works fine.

This change triggers a couple of bugs that ware easy to fix
(confusion between div and slash) that I've fixed along the way.
For the others, I'll see later.

Overall it's a progress albeit
  #fail: 80 -> 83

indeed:
  #unresolved: 20 -> 12
  #passes		878 -> 883
  time: 335 -> 228

Indeed, I've intentionally removed the when statements in clocked local var like this :

 var
    v:int;

because the following was producing a syntax error in ecexe:

 var
    v:int when c;

But Actually, the right thing to do was to generate the following:

 var
    (v:int) when c;

...

nb : #FAILS=90->89

(to be kind with data plotters).

Actually it does not fix any test, but I feel it is a (slight)
progress, so I commit it... Well, to be fair, one objective progress
is that I can now compile the test suite with the -np option.

e.g., "uminus" instead of "-"

Add --gen-autotest option that generates  a Lutin file and an oracle Lustre file suitable to compare the result of 2 Lustre compilers

As far as ldbg is concerned, it only traces the toplevel node, at
call event.

Note that I needed to rename quite a lot of modules to avoid name clashes
between lus2lic.a and ltop.

I've also merged the Verbose module with the one of Lutin so that
they can be shared (there were sharing 95% already).

Also Merge the Global and the MainArg module as they were
(bizzarely) both handling command args options.

In order to do that, I've generalised the type of merge : now the clock
argument can be any expression. Some assert false still prevent its use,
but it should be easy to get rid of them (I'll do that latter).

nb : programs do run, but I did not check that they run correctly...

Also fix a regression introduced in the previous change where
incorrect ec code was generated for diese.

1) At the Lic level, there's no reason to distinguish betwenn node
calls, and predef node calls. Indeed it makes things simpler and more
homogeneous afterwards.

2) int strings are only converted when necessary (constant evaluation).

3) const are handled directly under Lic.by_pos_op instead of being under
   PREDEF_CALL, which make things easier and more logical.

BTW, put everything that concerns node environement into the new
IdSolver module (from the Lic module).

Indeed, part of licDump was done in lic, but that part should
not depend in the compil option.

Pascal prepared « the field » for that change.

 - translate merge on bools in terms of current and ite
 - do not print the clock info in node profile in en mode

+ various fixes in lustre test files.

nb : now all tests in the should_work dir passes !!!

Also, force the merge to operate over an ident rather than on any val_exp.

nb : do not work for lv4/ec mode

Also fix some bugs in DumpLic when printing condact in other modes.

Plug back the enums expansion (-ee, --expand-enums) that translates enum types using extern consts and types.

nb : I've transformed all the regressions I've seen into todo entries
in todo.org.

nb 2 : I did not mv the newly broken tests into the broken dirs. I'll
do that for those I do not want to fix in the short term.

nb: les tests ne passent toujours bien sur.

* Partie lus -> AST

predef.ml -> srcPredef.ml
syntaxTreeCore.ml -> astCore.ml
syntaxTree.ml     -> astV6.ml
syntaxTreeDump.mli-> astV6Dump.mli

* Partie Ast -> Ast

solveIdent.mli -> astRecognizePredef.mli
syntaxTab.mli -> astTab.mli
symbolTab.mli -> astTabSymbol.mli

* Partie  AST -> lic (static evaluation)

eff.ml  -> lic.ml
getEff.mli -> ast2lic.mli
lazyCompiler.mli -> licTab.mli
builtIn.ml -> licMetaOp.ml
predefEval*.ml -> licEval*.ml
name.mli -> licName.mli

* Partie Lic -> Lic

uniqueOutput.mli      -> l2lCheckOutputs.mli
structArrayExpand.mli -> l2lExpandArrays.mli
nodesExpand.mli       -> l2lExpandNodes.mli
doNoPoly.ml           -> l2lRmPoly.ml
doAliasTypes.ml       -> l2lAliasType.ml
doSplit.ml            -> l2lSplit.ml