private bool HandleAwaitStatement(JsAwaitStatement stmt, StackEntry location, ImmutableStack <StackEntry> stack, ImmutableStack <Tuple <string, State> > breakStack, ImmutableStack <Tuple <string, State> > continueStack, State currentState, State returnState, IList <JsStatement> currentBlock)
{
var stateAfter = GetStateAfterStatement(location, stack, currentState.FinallyStack, returnState).Item1;
bool createDummyState = false;
if (stateAfter.StateValue == returnState.StateValue)
{
stateAfter = CreateNewStateValue(currentState.FinallyStack);
createDummyState = true; // We must never return to our parent state after an await because
}
currentBlock.Add(new JsSetNextStateStatement(stateAfter.StateValue));
currentBlock.Add(JsExpression.Invocation(JsExpression.Member(stmt.Awaiter, stmt.OnCompletedMethodName), JsExpression.Identifier(_stateMachineMethodName)));
if (_needDoFinallyBlocksVariable)
{
currentBlock.Add(JsExpression.Assign(JsExpression.Identifier(_doFinallyBlocksVariableName), JsExpression.False));
}
currentBlock.Add(JsStatement.Return());
if (!stack.IsEmpty || location.Index < location.Block.Statements.Count - 1)
{
Enqueue(PushFollowing(stack, location), breakStack, continueStack, stateAfter, returnState);
}
if (createDummyState)
{
Enqueue(ImmutableStack <StackEntry> .Empty.Push(new StackEntry(JsStatement.Block(JsStatement.BlockMerged(new JsStatement[0])), 0)), breakStack, continueStack, stateAfter, returnState);
}
return(false);
}
public object VisitAwaitStatement(JsAwaitStatement statement, bool addNewline)
{
if (!_allowIntermediates)
{
throw new NotSupportedException("await should not occur in the output stage");
}
_cb.Append("await ");
VisitExpression(statement.Awaiter, false);
_cb.Append(":" + statement.OnCompletedMethodName + ";");
if (addNewline)
{
_cb.AppendLine();
}
return(null);
}
public override JsStatement VisitAwaitStatement(JsAwaitStatement statement, object data)
{
_result |= InterestingConstruct.Await;
return(statement);
}
private bool HandleAwaitStatement(JsAwaitStatement stmt, StackEntry location, ImmutableStack<StackEntry> stack, ImmutableStack<Tuple<string, State>> breakStack, ImmutableStack<Tuple<string, State>> continueStack, State currentState, State returnState, IList<JsStatement> currentBlock) {
var stateAfter = GetStateAfterStatement(location, stack, currentState.FinallyStack, returnState).Item1;
bool createDummyState = false;
if (stateAfter.StateValue == returnState.StateValue) {
stateAfter = CreateNewStateValue(currentState.FinallyStack);
createDummyState = true; // We must never return to our parent state after an await because
}
currentBlock.Add(new JsSetNextStateStatement(stateAfter.StateValue));
currentBlock.Add(JsExpression.Invocation(JsExpression.Member(stmt.Awaiter, stmt.OnCompletedMethodName), JsExpression.Identifier(_stateMachineMethodName)));
if (_needDoFinallyBlocksVariable)
currentBlock.Add(JsExpression.Assign(JsExpression.Identifier(_doFinallyBlocksVariableName), JsExpression.False));
currentBlock.Add(JsStatement.Return());
if (!stack.IsEmpty || location.Index < location.Block.Statements.Count - 1) {
Enqueue(PushFollowing(stack, location), breakStack, continueStack, stateAfter, returnState);
}
if (createDummyState) {
Enqueue(ImmutableStack<StackEntry>.Empty.Push(new StackEntry(JsStatement.Block(JsStatement.BlockMerged(new JsStatement[0])), 0)), breakStack, continueStack, stateAfter, returnState);
}
return false;
}
public virtual JsStatement VisitAwaitStatement(JsAwaitStatement statement, TData data)
{
var awaiter = VisitExpression(statement.Awaiter, data);
return(ReferenceEquals(awaiter, statement.Awaiter) ? statement : new JsAwaitStatement(awaiter, statement.OnCompletedMethodName));
}
