public override JsStatement VisitYieldStatement(JsYieldStatement statement, object data)
{
if (statement.Value != null)
{
throw new InvalidOperationException("yield return should have been already taken care of.");
}
return(new JsGotoStateStatement(_exitState, _currentState));
}
public override JsStatement VisitYieldStatement(JsYieldStatement statement, object data)
{
if (statement.Value != null)
{
_result |= InterestingConstruct.YieldReturn;
}
else
{
_result |= InterestingConstruct.YieldBreak;
}
return(statement);
}
private bool HandleYieldReturnStatement(JsYieldStatement 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);
currentBlock.Add(_makeSetCurrent(stmt.Value));
currentBlock.Add(new JsSetNextStateStatement(stateAfter.Item1.StateValue));
currentBlock.Add(JsStatement.Return(JsExpression.True));
if (!stack.IsEmpty || location.Index < location.Block.Statements.Count - 1)
{
Enqueue(PushFollowing(stack, location), breakStack, continueStack, stateAfter.Item1, returnState);
}
return(false);
}
public object VisitYieldStatement(JsYieldStatement statement, bool addNewline)
{
if (!_allowIntermediates)
{
throw new NotSupportedException("yield should not occur in the output stage");
}
if (statement.Value != null)
{
_cb.Append("yield return ");
VisitExpression(statement.Value, false);
_cb.Append(";");
}
else
{
_cb.Append("yield break;");
}
if (addNewline)
{
_cb.AppendLine();
}
return(null);
}
private bool HandleYieldReturnStatement(JsYieldStatement 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);
currentBlock.Add(new JsExpressionStatement(_makeSetCurrent(stmt.Value)));
currentBlock.Add(new JsSetNextStateStatement(stateAfter.Item1.StateValue));
currentBlock.Add(new JsReturnStatement(JsExpression.True));
if (!stack.IsEmpty || location.Index < location.Block.Statements.Count - 1) {
Enqueue(PushFollowing(stack, location), breakStack, continueStack, stateAfter.Item1, returnState);
}
return false;
}
public virtual JsStatement VisitYieldStatement(JsYieldStatement statement, TData data)
{
var value = statement.Value != null?VisitExpression(statement.Value, data) : null;
return(ReferenceEquals(value, statement.Value) ? statement : new JsYieldStatement(value));
}
