public override JsCatchClause VisitCatchClause(JsCatchClause clause, Tuple <JsDeclarationScope, DeclarationScopeHierarchy> data)
{
data.Item2.ChildScopes.Add(clause);
var hier = new DeclarationScopeHierarchy(data.Item1);
_result[clause] = hier;
return(base.VisitCatchClause(clause, Tuple.Create((JsDeclarationScope)clause, hier)));
}
public virtual JsNode Visit(JsCatchClause node)
{
return(DefaultVisit(node, x =>
{
x.Declaration = (JsVariableDeclarator)x.Declaration.Accept(this);
x.Body = (JsBlockStatement)x.Body.Accept(this);
return x;
}));
}
public override JsCatchClause VisitCatchClause(JsCatchClause clause, Tuple <Dictionary <string, string>, HashSet <string> > data)
{
var newData = new Dictionary <string, string>(data.Item1);
var usedNames = new HashSet <string>(data.Item1.Values.Concat(data.Item2));
string newName = _generateName(clause.Identifier, usedNames);
newData.Add(clause.Identifier, newName);
return(JsStatement.Catch(newName, VisitStatement(clause.Body, Tuple.Create(newData, data.Item2))));
}
public override void VisitCatchClause(JsCatchClause node)
{
output.Append("catch ");
if (node.Declaration != null)
{
output.Append("(");
node.Declaration.Accept(this);
output.Append(") ");
}
node.Body.Accept(this);
}
public JsNode VisitCatchClause(CatchClause node)
{
var node2 = new JsCatchClause();
if (node.VariableName.IsNullOrEmpty())
{
node.VariableName = "$$e" + (VariableExceptionCounter++); //Generate a psuedo-unique variable name
}
node2.IdentifierName = node.VariableName;
node2.Block = (JsBlock)Visit(node.Body);
if (node2.Block != null)
{
node2.Descendants <JsThrowStatement>().Where(t => t.Expression == null).ForEach(t => t.Expression = Js.Member(node2.IdentifierName));
}
return(node2);
}
public override JsCatchClause VisitCatchClause(JsCatchClause clause, IDictionary <string, string> data)
{
IDictionary <string, string> newData;
if (!_renames.TryGetValue(clause, out newData))
{
newData = data;
}
string newName;
if (newData.TryGetValue(clause.Identifier, out newName))
{
return(JsStatement.Catch(newName, VisitStatement(clause.Body, newData)));
}
else
{
return(base.VisitCatchClause(clause, newData));
}
}
public virtual void Visit(JsCatchClause node)
{
DefaultVisit(node);
node.Declaration.Accept(this);
node.Body.Accept(this);
}
public override JsCatchClause VisitCatchClause(JsCatchClause clause, Tuple <ImmutableStack <JsDeclarationScope>, HashSet <string> > data)
{
_result[clause] = new HashSet <string>();
return(base.VisitCatchClause(clause, Tuple.Create(data.Item1.Push(clause), Union(data.Item2, new[] { clause.Identifier }))));
}
private bool HandleTryStatement(JsTryStatement stmt, StackEntry location, ImmutableStack <StackEntry> stack, ImmutableStack <Tuple <string, State> > breakStack, ImmutableStack <Tuple <string, State> > continueStack, State currentState, State returnState, IList <JsStatement> currentBlock)
{
if (_isIteratorBlock && (FindInterestingConstructsVisitor.Analyze(stmt.GuardedStatement, InterestingConstruct.YieldReturn) || (stmt.Finally != null && stmt.Catch == null && !currentState.FinallyStack.IsEmpty)))
{
if (stmt.Catch != null)
{
throw new InvalidOperationException("Cannot yield return from try with catch");
}
string handlerName = _allocateFinallyHandler();
JsBlockStatement handler;
if (FindInterestingConstructsVisitor.Analyze(stmt.Finally, InterestingConstruct.Label))
{
var inner = ProcessInner(stmt.Finally, breakStack, continueStack, currentState.FinallyStack, currentState.StateValue);
handler = new JsBlockStatement(new[] { new JsSetNextStateStatement(inner.Item2) }.Concat(inner.Item1));
handler = new FinalizerRewriter(_stateVariableName, _labelStates).Process(handler);
}
else
{
handler = stmt.Finally;
}
_finallyHandlers.Add(Tuple.Create(handlerName, handler));
var stateAfter = GetStateAfterStatement(location, stack, currentState.FinallyStack, returnState);
var innerState = CreateNewStateValue(currentState.FinallyStack, handlerName);
var stateBeforeFinally = CreateNewStateValue(innerState.FinallyStack);
currentBlock.Add(new JsSetNextStateStatement(innerState.StateValue));
currentBlock.AddRange(Handle(ImmutableStack <StackEntry> .Empty.Push(new StackEntry(stmt.GuardedStatement, 0)), breakStack, continueStack, innerState, stateBeforeFinally));
Enqueue(ImmutableStack <StackEntry> .Empty.Push(new StackEntry(new JsBlockStatement(new JsBlockStatement(new JsStatement[0], true)), 0)), breakStack, continueStack, stateBeforeFinally, stateAfter.Item1);
if (!stack.IsEmpty || location.Index < location.Block.Statements.Count - 1)
{
Enqueue(PushFollowing(stack, location), breakStack, continueStack, stateAfter.Item1, returnState);
}
return(false);
}
else if (_isIteratorBlock && stmt.Finally != null && !currentState.FinallyStack.IsEmpty)
{
// This is necessary to special-case in order to ensure that the inner finally block is executed before all outer ones.
return(HandleTryStatement(new JsTryStatement(new JsTryStatement(stmt.GuardedStatement, stmt.Catch, null), null, stmt.Finally), location, stack, breakStack, continueStack, currentState, returnState, currentBlock));
}
else
{
var rewriter = new NestedJumpStatementRewriter(breakStack, continueStack, currentState, _exitState.Value);
JsBlockStatement guarded;
var guardedConstructs = FindInterestingConstructsVisitor.Analyze(stmt.GuardedStatement);
if ((guardedConstructs & (InterestingConstruct.Label | InterestingConstruct.Await)) != InterestingConstruct.None)
{
var inner = ProcessInner(stmt.GuardedStatement, breakStack, continueStack, currentState.FinallyStack, currentState.StateValue);
guarded = new JsBlockStatement(inner.Item1);
currentBlock.Add(new JsSetNextStateStatement(inner.Item2));
}
else
{
guarded = rewriter.Process(stmt.GuardedStatement);
}
JsCatchClause @catch;
if (stmt.Catch != null)
{
if (FindInterestingConstructsVisitor.Analyze(stmt.Catch.Body, InterestingConstruct.Label))
{
var inner = ProcessInner(stmt.Catch.Body, breakStack, continueStack, currentState.FinallyStack, null);
@catch = new JsCatchClause(stmt.Catch.Identifier, new JsBlockStatement(new[] { new JsSetNextStateStatement(inner.Item2) }.Concat(inner.Item1)));
}
else
{
var body = rewriter.Process(stmt.Catch.Body);
@catch = ReferenceEquals(body, stmt.Catch.Body) ? stmt.Catch : new JsCatchClause(stmt.Catch.Identifier, body);
}
}
else
{
@catch = null;
}
JsBlockStatement @finally;
if (stmt.Finally != null)
{
if (FindInterestingConstructsVisitor.Analyze(stmt.Finally, InterestingConstruct.Label))
{
var inner = ProcessInner(stmt.Finally, breakStack, continueStack, currentState.FinallyStack, null);
@finally = new JsBlockStatement(new[] { new JsSetNextStateStatement(inner.Item2) }.Concat(inner.Item1));
}
else
{
@finally = rewriter.Process(stmt.Finally);
}
if ((guardedConstructs & InterestingConstruct.Await) != InterestingConstruct.None)
{
// Wrap the finally block inside an 'if (doFinallyBlocks) {}'
@finally = new JsBlockStatement(new JsIfStatement(JsExpression.Identifier(_doFinallyBlocksVariableName), @finally, null));
}
}
else
{
@finally = null;
}
if (currentBlock.Count > 0 && _childStates.ContainsKey(currentState.StateValue))
{
var newBlock = new JsIfStatement(JsExpression.Same(JsExpression.Identifier(_stateVariableName), JsExpression.Number(currentState.StateValue)), new JsBlockStatement(currentBlock), null);
currentBlock.Clear();
currentBlock.Add(newBlock);
}
currentBlock.Add(new JsTryStatement(guarded, @catch, @finally));
return(true);
}
}
public override JsCatchClause VisitCatchClause(JsCatchClause clause, object data)
{
_result.Add(clause.Identifier);
return(base.VisitCatchClause(clause, data));
}
public override JsCatchClause VisitCatchClause(JsCatchClause clause, Tuple <ImmutableStack <Function>, HashSet <string> > data)
{
return(base.VisitCatchClause(clause, Tuple.Create(data.Item1, Union(data.Item2, new[] { clause.Identifier }))));
}
public override JsCatchClause VisitCatchClause(JsCatchClause clause, HashSet <string> data)
{
return(base.VisitCatchClause(clause, _result[clause] = new HashSet <string> {
clause.Identifier
}));
}
public virtual JsCatchClause VisitCatchClause(JsCatchClause clause, TData data)
{
var body = VisitStatement(clause.Body, data);
return(ReferenceEquals(body, clause.Body) ? clause : new JsCatchClause(clause.Identifier, body));
}
public void Visit(JsCatchClause node)
{
BeforeVisit(node);
DefaultVisit(node, VisitCatchClause);
AfterVisit(node);
}
public virtual void VisitCatchClause(JsCatchClause node)
{
}
public override JsCatchClause VisitCatchClause(JsCatchClause clause, IList <string> data)
{
return(base.VisitCatchClause(clause, _result[clause] = new List <string>()));
}