@Override
public SStmCG caseAClassInvariantStm(AClassInvariantStm node, IRInfo question)
throws AnalysisException {
List<PExp> exps = new LinkedList<PExp>();
for (PDefinition d : node.getInvDefs()) {
if (!(d instanceof AClassInvariantDefinition)) {
Logger.getLog()
.printErrorln(
"Expected class invariant definition in '"
+ this.getClass().getName()
+ "'. Got: "
+ d);
return null;
}
AClassInvariantDefinition invDef = (AClassInvariantDefinition) d;
exps.add(invDef.getExpression());
}
AReturnStmCG returnStmCg = new AReturnStmCG();
if (exps.isEmpty()) {
// Should not really be necessary
returnStmCg.setExp(question.getExpAssistant().consBoolLiteral(true));
} else if (exps.size() == 1) {
SExpCG expCg = exps.get(0).apply(question.getExpVisitor(), question);
returnStmCg.setExp(expCg);
} else {
// We have more than one expressions from which we will build an 'and chain'
AAndBoolBinaryExpCG andExpTopCg = new AAndBoolBinaryExpCG();
andExpTopCg.setType(new ABoolBasicTypeCG());
andExpTopCg.setLeft(exps.get(0).apply(question.getExpVisitor(), question));
AAndBoolBinaryExpCG previousAndExpCg = andExpTopCg;
// The remaining ones except the last
for (int i = 1; i < exps.size() - 1; i++) {
SExpCG nextExpCg = exps.get(i).apply(question.getExpVisitor(), question);
AAndBoolBinaryExpCG nextAndExpCg = new AAndBoolBinaryExpCG();
nextAndExpCg.setType(new ABoolBasicTypeCG());
nextAndExpCg.setLeft(nextExpCg);
previousAndExpCg.setRight(nextAndExpCg);
previousAndExpCg = nextAndExpCg;
}
previousAndExpCg.setRight(
exps.get(exps.size() - 1).apply(question.getExpVisitor(), question));
returnStmCg.setExp(andExpTopCg);
}
return returnStmCg;
}
public SatisfiabilityObligation(
AClassInvariantDefinition node, IPOContextStack ctxt, IPogAssistantFactory af)
throws AnalysisException {
super(node, POType.STATE_INV_SAT, ctxt, node.getLocation(), af);
AExistsExp exists_exp = new AExistsExp();
exists_exp.setType(new ABooleanBasicType());
List<PMultipleBind> binds = stateInvBinds(node);
exists_exp.setBindList(binds);
exists_exp.setPredicate(node.getExpression().clone());
stitch = exists_exp;
valuetree.setPredicate(ctxt.getPredWithContext(exists_exp));
}
protected List<PMultipleBind> stateInvBinds(AClassInvariantDefinition node) {
List<PMultipleBind> binds = new LinkedList<PMultipleBind>();
for (PDefinition p : node.getClassDefinition().getDefinitions()) {
if (p instanceof AInstanceVariableDefinition) {
binds.add(getMultipleTypeBind(p.getType().clone(), p.getName().clone()));
}
}
return binds;
}
