public override AstNode Visit(CatchStatement node)
{
// Begin the node.
builder.BeginNode(node);
// Read the exception.
Structure exception = (Structure)node.GetNodeType();
// Create the block.
BasicBlock block = CreateBasicBlock();
block.SetName("catch");
builder.SetBlock(block);
// Add the catch to the context.
ExceptionContext context = node.GetContext();
context.AddCatch(exception, block);
// Load the exception.
LocalVariable local = node.GetVariable();
if(local != null)
builder.CreateStoreLocal(local);
else
builder.CreatePop();
// Update the scope.
PushScope(node.GetScope());
// Visit the children.
VisitList(node.GetChildren());
// Restore the scope.
PopScope();
return builder.EndNode();
}
public override AstNode Visit(CatchStatement node)
{
// Update the scope.
PushScope(node.GetScope());
// Visit the children.
VisitList(node.GetChildren());
// Restore the scope.
PopScope();
return node;
}
public override AstNode Visit(CatchStatement node)
{
// Get the type expression.
Expression typeExpression = node.GetExceptionType();
// Visit the type node.
typeExpression.Accept(this);
// Get the type of the type expression.
IChelaType type = typeExpression.GetNodeType();
IChelaType objectType = ExtractActualType(typeExpression, type);
// Only accept classes.
if(!objectType.IsClass())
Error(node, "only class instances can be exceptions.");
// Set the node type.
node.SetNodeType(objectType);
// Create the catch lexical scope.
LexicalScope scope = CreateLexicalScope(node);
node.SetScope(scope);
// Create the exception variable.
string exceptName = node.GetName();
if(exceptName != null && exceptName != "")
{
LocalVariable exceptLocal = new LocalVariable(exceptName, scope,
ReferenceType.Create(objectType));
node.SetVariable(exceptLocal);
}
// Enter into the catch scope.
PushScope(scope);
// Visit the children.
node.GetChildren().Accept(this);
// Restore the scope.
PopScope();
return node;
}