/**
* Updates the <code>node</code> to which <b>(OBJECT)</b> was applied previously.
*
* @param context the minimal typing proof context.
* @param pNode the node to update according to <b>(OBJECT)</b>.
*/
public void updateObject(MinimalTypingProofContext context, MinimalTypingProofNode pNode) {
MinimalTypingExpressionProofNode node = (MinimalTypingExpressionProofNode) pNode;
if (node.getFirstChild().isFinished()) {
MinimalTypingExpressionProofNode child =
(MinimalTypingExpressionProofNode) node.getFirstChild();
TypeEnvironment environment = child.getEnvironment();
Identifier self = new Identifier("self", Identifier.Set.SELF); // $NON-NLS-1$
ObjectType objectType = (ObjectType) environment.get(self);
RowType type = (RowType) objectType.getPhi();
RowType type2 = (RowType) child.getType();
try {
// check type <: type2 and type2 <: type
// if both true type = type2
subtypeInternal(type, type2);
subtypeInternal(type2, type);
} catch (Exception e) {
throw new RuntimeException(
MessageFormat.format(
Messages.getString("MinimalTypingException.7"),
node.getExpression().toString())); // $NON-NLS-1$
}
ObjectType object = new ObjectType(type);
// set the type of this node
context.setNodeType(node, object);
}
}
/**
* Updates the <code>node</code> to which <b>(DUPL-SUBSUME)</b> was applied previously.
*
* @param context the minimal typing proof context.
* @param pNode the node to update according to <b>(DUPL-SUBSUME)</b>.
*/
public void updateDuplSubsume(MinimalTypingProofContext context, MinimalTypingProofNode pNode) {
MinimalTypingExpressionProofNode node = (MinimalTypingExpressionProofNode) pNode;
Duplication duplication = (Duplication) node.getExpression();
if (node.getChildCount() == 1 && node.getLastChild().isFinished()) {
// generate new child node
context.addProofNode(node, node.getEnvironment(), duplication.getExpressions()[0]);
} else if (node.getChildCount() > 1 && node.getLastChild().isFinished()) {
// check if a:tau und e:tau' tau'<: tau
TypeEnvironment environment = node.getEnvironment();
Identifier id = duplication.getIdentifiers()[node.getChildCount() - 2];
MonoType tau = null;
try {
tau = (MonoType) environment.get(id);
} catch (Exception e) {
throw new RuntimeException(
MessageFormat.format(
Messages.getString("MinimalTypingException.9"), id.toString())); // $NON-NLS-1$
}
MonoType tau2 = node.getLastChild().getType();
if (tau == null || tau2 == null)
throw new RuntimeException(
MessageFormat.format(
Messages.getString("MinimalTypingException.2"),
"self")); //$NON-NLS-1$ //$NON-NLS-2$
try {
subtypeInternal(tau, tau2);
subtypeInternal(tau2, tau);
} catch (Exception e) {
throw new RuntimeException(
MessageFormat.format(
Messages.getString("MinimalTypingException.2"),
"self")); //$NON-NLS-1$ //$NON-NLS-2$
}
}
if (node.getChildCount() == duplication.getIdentifiers().length + 1) {
// set the type of this node
context.setNodeType(node, node.getFirstChild().getType());
// all childs added, so nothing more to do
return;
}
// generate new child node
context.addProofNode(
node, node.getEnvironment(), duplication.getExpressions()[node.getChildCount() - 1]);
}
/**
* Applies the <b>(OBJECT)</b> rule to the
* <code>node</node> using the <code>context</code>.
*
* @param context the minimal typing proof context.
* @param pNode the minimal typing proof node.
*/
public void applyObject(MinimalTypingProofContext context, MinimalTypingProofNode pNode) {
MinimalTypingExpressionProofNode node = (MinimalTypingExpressionProofNode) pNode;
ObjectExpr object = (ObjectExpr) node.getExpression();
MonoType tau = object.getTau();
// check if user entered type for self
if (tau == null) {
throw new RuntimeException(
MessageFormat.format(
Messages.getString("MinimalTypingException.2"), "self")); // $NON-NLS-1$ //$NON-NLS-2$
}
// if type is a rec type, unfold to get a object type
if (tau instanceof RecType) {
RecType rec = (RecType) tau;
tau = rec.getTau().substitute(rec.getTypeName(), rec);
}
TypeEnvironment environment = node.getEnvironment();
environment = environment.star();
// generate new child node
context.addProofNode(node, environment.extend(object.getId(), tau), object.getRow());
}
/**
* Updates the <code>node</code> to which <b>(ATTR)</b> was applied previously.
*
* @param context the minimal typing proof context.
* @param pNode the node to update according to <b>(ATTR)</b>.
*/
public void updateAttr(MinimalTypingProofContext context, MinimalTypingProofNode pNode) {
MinimalTypingExpressionProofNode node = (MinimalTypingExpressionProofNode) pNode;
if (node.getChildCount() == 1 && node.getFirstChild().isFinished()) {
Row rowExpression = (Row) node.getExpression();
Attribute attr = (Attribute) rowExpression.getExpressions()[0];
TypeEnvironment environment = node.getEnvironment();
// Create the tailRow and add it as Expression of a new Child
Expression[] expressions = ((Row) node.getExpression()).getExpressions();
Expression[] tailRow = new Expression[expressions.length - 1];
for (int i = 1; i < expressions.length; i++) {
tailRow[i - 1] = expressions[i];
}
Row row = new Row(tailRow);
// generate new child node
context.addProofNode(
node, environment.extend(attr.getId(), node.getFirstChild().getType()), row);
}
if (node.getChildCount() == 2 && node.getChildAt(1).isFinished()) {
// set the type of this node
context.setNodeType(node, node.getChildAt(1).getType());
}
}
