/**
* 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>(METHOD-SUBSUME)</b> was applied previously.
*
* @param context the minimal typing proof context.
* @param pNode the node to update according to <b>(METHOD-SUBSUME)</b>.
*/
public void updateMethodSubsume(MinimalTypingProofContext context, MinimalTypingProofNode pNode) {
MinimalTypingExpressionProofNode node = (MinimalTypingExpressionProofNode) pNode;
Row row = (Row) node.getExpression();
if (node.getChildCount() == 1 && node.getFirstChild().isFinished()) {
if (row.getExpressions()[0] instanceof Method) {
Method method = (Method) row.getExpressions()[0];
// generate new child node
context.addProofNode(node, node.getEnvironment(), method.getE());
} else {
CurriedMethod curriedMethod = (CurriedMethod) row.getExpressions()[0];
Expression curriedMethodE = curriedMethod.getE();
MonoType[] types = curriedMethod.getTypes();
Identifier[] identifiers = curriedMethod.getIdentifiers();
for (int n = identifiers.length - 1; n > 0; --n) {
curriedMethodE = new Lambda(identifiers[n], types[n], curriedMethodE);
}
// generate new child node
context.addProofNode(pNode, node.getEnvironment(), curriedMethodE);
}
} else if (node.getChildCount() == 2 && node.getChildAt(1).isFinished()) {
// 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 newRow = new Row(tailRow);
// generate new child node
context.addProofNode(node, node.getEnvironment(), newRow);
} else if (node.getChildCount() == 3 && node.getChildAt(2).isFinished()) {
Expression expression = row.getExpressions()[0];
MonoType type = node.getFirstChild().getType();
// if type is a rec type, unfold to get a object type
if (type instanceof RecType) {
RecType rec = (RecType) type;
type = rec.getTau().substitute(rec.getTypeName(), rec);
}
ObjectType object = (ObjectType) type;
RowType rowType = (RowType) object.getPhi();
Identifier[] identifiers = rowType.getIdentifiers();
MonoType[] types2 = rowType.getTypes();
if (expression instanceof Method) {
Identifier m =
(expression instanceof Method
? ((Method) expression).getId()
: ((CurriedMethod) expression).getIdentifiers()[0]);
MonoType tau = null;
for (int i = 0; i < identifiers.length; i++) {
if (m.equals(identifiers[i])) {
tau = types2[i];
break;
}
}
if (tau == null)
throw new RuntimeException(
MessageFormat.format(
Messages.getString("MinimalTypingException.2"), m.toString())); // $NON-NLS-1$
// generate new child node
context.addProofNode(node, tau, node.getChildAt(1).getType());
} else {
CurriedMethod method = (CurriedMethod) expression;
Identifier m = method.getIdentifiers()[0];
type = types2[rowType.getIndexOfIdentifier(m)];
MonoType[] types = method.getTypes();
MonoType childType = node.getChildAt(1).getType();
while (childType instanceof ArrowType) {
childType = ((ArrowType) childType).getTau2();
}
ArrowType arrow = new ArrowType(types[types.length - 1], childType);
for (int i = types.length - 2; i > 1; i--) {
arrow = new ArrowType(types[i], arrow);
}
// generate new child node
context.addProofNode(node, arrow, type);
}
} else if (node.getChildCount() == 4 && node.getChildAt(3).isFinished()) {
Expression expression = row.getExpressions()[0];
MonoType type = node.getChildAt(1).getType();
while (type instanceof ArrowType) {
type = ((ArrowType) type).getTau2();
}
MonoType type2 =
(expression instanceof Method
? ((Method) expression).getTau()
: ((CurriedMethod) expression).getTypes()[0]);
if (type2 != null)
// generate new child node
context.addProofNode(node, type, type2);
else {
Identifier[] ids = new Identifier[1];
ids[0] =
(expression instanceof Method
? ((Method) expression).getIdentifiers()[0]
: ((CurriedMethod) expression).getIdentifiers()[0]);
MonoType[] types = {node.getChildAt(1).getType()};
RowType rowType = new RowType(ids, types);
RowType phi = (RowType) node.getChildAt(2).getType();
rowType = RowType.union(rowType, phi);
// set the type of this node
context.setNodeType(node, rowType);
}
} else if (node.getChildCount() == 5 && node.getChildAt(4).isFinished()) {
Expression expression = row.getExpressions()[0];
Identifier[] ids = new Identifier[1];
ids[0] =
(expression instanceof Method
? ((Method) expression).getIdentifiers()[0]
: ((CurriedMethod) expression).getIdentifiers()[0]);
MonoType[] types = {node.getChildAt(1).getType()};
RowType rowType = new RowType(ids, types);
RowType phi = (RowType) node.getChildAt(2).getType();
rowType = RowType.union(rowType, phi);
// set the type of this node
context.setNodeType(node, rowType);
}
}
