For a clock (ck on x) to be well-formed in an environment H, we must
have H x = ck, i.e., the clock of x is the same as the clock ck of the
stream being sampled.
This constraint is guaranteed by construction for fully inferred clocks
(by the rules for when and merge), but nothing guarantees that user
declarations be well-formed. This can lead to problems.
For instance, this invalid program is incorrectly accepted:
node f (x : bool; a : bool :: . on b;
b : bool :: . on a) returns (y:bool);
let
y = true;
tel
as is this one:
node f(a: bool :: . on a; b: bool :: . on a)
returns (z: bool);
var w : bool;
let
w = a when b;
z = false fby w;
tel
This invalid program is incorrectly accepted and leads to an internal
compiler error:
node f (x : bool) returns (y:bool);
var a : bool :: . on b;
b : bool :: . on a;
let
y = true;
a = true;
b = true;
tel
This patch enforces the well-formedness constraint. It gives a sensible
error message when the constraint cannot be satisfied.
Leave only comments about compilation passes.
Remove output of intermediate code on standard output: added
generation of <module>.log containing all intermediate code.
Changes in CtrlNbac back-end :
- systematic sink state, only in ctrln code
- sink state "ok" removed (useless as was coded)
- no sink state in minils code
- outputs in ctrln are local variables, no longer state variables
* Several controllers by module : added option "-m <Module>" in ctrl2ept
Generate controllers for each node of one module in <module>_controller.ept
* Types of <Module> no longer moved to <Module>_controller
* Added "_types" suffix for type dependencies for C target
Contracts can now comprise a list of objectives (in any order).
One objective can be (e being a Boolean heptagon expression) :
- invariance, with the syntax "enforce e"
- reachability, "reachable e"
- attractivity, "attractive e"
- Controllable-Nbac export (CtrlNbacGen): correct handling of float
expressions, as well as alias types;
- Controllable-Nbac controller importer (CtrlNbacAsEpt): Declaration
of enumerated types and aliases that are relocated to controller
modules is now performed based on the interface. Dependencies
between type aliases are also taken into account now;
- ctrl2ept tool: correct loading of pervasives module.
To avoid cyclic module dependencies (that show up when trying to
compile, e.g, the generated C code), enumerated types declared in the
main program are now "moved" into the module containing the generated
controllers.
To enable recovery of parameter and output ordering by `ctrl2ept', the
Controllable-Nbac generation procedure now declares a new module
dedicated to the encapsulation of the controller functions yet to be
synthesized.
Handling of type declarations are probably buggy.
Allowing additional inputs from abstractions within contracts. Thus,
calling non-inlined subnodes is allowed, as well as operations on
non-Boolean inputs or states (in contracts).
- Stripped portions of `myocamlbuild{,_config}.ml' that seem useless
when `-use-ocamlfind' is passed to ocamlbuild.
- Added some code in `myocamlbuild_config.ml' to be able to generate
documentation by merging interface and implementation files.
- CtrlNbac: new module for internal representation and output code for
Controllable-Nbac format;
- CtrlNbacGen: translation into Controllable-Nbac of Minils nodes
necessitating controller synthesis; the insertion of calls to
controllers is not yet done, and the nodes are left unchanged.
- Translation to z3z now evaluates constant expressions instead of
abstracting them. This non-feature could cause "false" synthesis
failures due to non-translatable yet constant expressions possibly
introduced by tomato (or manually), for instance `not false' in node
`n' bellow:
node n (a: bool) returns (ok: bool)
contract assume true enforce ok with ()
let
ok = a or not false;
tel
