@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;
}
@Override
public SStmCG caseACallObjectStm(ACallObjectStm node, IRInfo question) throws AnalysisException {
PType type = node.getType();
PObjectDesignator objectDesignator = node.getDesignator();
ILexNameToken field = node.getField();
LinkedList<PExp> args = node.getArgs();
STypeCG typeCg = type.apply(question.getTypeVisitor(), question);
SObjectDesignatorCG objectDesignatorCg =
objectDesignator.apply(question.getObjectDesignatorVisitor(), question);
if (node.getExplicit()) {
SClassDefinition enclosingClass = node.getAncestor(SClassDefinition.class);
if (enclosingClass != null) {
if (!field.getModule().equals(enclosingClass.getName().getName())) {
// A quoted method call is only supported if the explicit
// module name is equal to that of the enclosing class. Say A
// is a sub class of S and 'a' is an instance of A then a.A`op();
// is allowed (although it is the same as a.op()). However,
// a.S`op(); is not allowed.
question.addUnsupportedNode(
node,
"A quoted object call statement is only supported if the explicit module name is equal to that of the enclosing class");
}
} else {
Logger.getLog()
.printErrorln(
"Could not find enclosing the statement of call a call object statement.");
}
}
String fieldNameCg = field.getName();
ACallObjectStmCG callObject = new ACallObjectStmCG();
callObject.setType(typeCg);
callObject.setDesignator(objectDesignatorCg);
callObject.setFieldName(fieldNameCg);
for (PExp arg : args) {
SExpCG argCg = arg.apply(question.getExpVisitor(), question);
if (argCg != null) {
callObject.getArgs().add(argCg);
} else {
return null;
}
}
return callObject;
}
public STypeCG toIrType(IRInfo info) {
try {
STypeCG irType = type.apply(info.getTypeVisitor(), info);
if (irType != null) {
irType.setOptional(optional);
}
return irType;
} catch (AnalysisException e) {
Logger.getLog()
.printErrorln(
"Problems encountered while attempting "
+ "to construct the IR type from a VDM type: "
+ e.getMessage()
+ " in '"
+ this.getClass().getSimpleName()
+ "'");
e.printStackTrace();
}
return null;
}