public override AstNode VisitUsingStatement(UsingStatement usingStatement)
{
var awaitSearch = new AwaitSearchVisitor(null);
usingStatement.AcceptVisitor(awaitSearch);
var awaiters = awaitSearch.GetAwaitExpressions().ToArray();
UsingStatement node = (UsingStatement)base.VisitUsingStatement(usingStatement) ?? (UsingStatement)usingStatement.Clone();
if (awaiters.Length > 0)
{
IEnumerable <AstNode> inner = null;
var res = node.ResourceAcquisition;
var varStat = res as VariableDeclarationStatement;
if (varStat != null)
{
inner = varStat.Variables.Skip(1);
res = varStat.Variables.First();
}
return(EmitUsing(node, res, inner, varStat));
}
return(node);
}
protected override void DoEmit()
{
if (ExpressionStatement.IsNull)
{
return;
}
var oldSemiColon = Emitter.EnableSemicolon;
if (Emitter.IsAsync)
{
var awaitSearch = new AwaitSearchVisitor(Emitter);
ExpressionStatement.Expression.AcceptVisitor(awaitSearch);
}
bool isAwaiter = ExpressionStatement.Expression is UnaryOperatorExpression && ((UnaryOperatorExpression)ExpressionStatement.Expression).Operator == UnaryOperatorType.Await;
ExpressionStatement.Expression.AcceptVisitor(Emitter);
if (Emitter.EnableSemicolon && !isAwaiter)
{
WriteSemiColon(true);
}
if (oldSemiColon)
{
Emitter.EnableSemicolon = true;
}
}
protected AstNode[] GetAwaiters(AstNode node)
{
var awaitSearch = new AwaitSearchVisitor(Emitter);
node.AcceptVisitor(awaitSearch);
return(awaitSearch.GetAwaitExpressions().ToArray());
}
public override void VisitUsingStatement(UsingStatement usingStatement)
{
if (Found)
{
return;
}
var awaitSearch = new AwaitSearchVisitor(null);
usingStatement.AcceptVisitor(awaitSearch);
var awaiters = awaitSearch.GetAwaitExpressions().ToArray();
if (awaiters.Length > 0)
{
Found = true;
}
base.VisitUsingStatement(usingStatement);
}