public UnifiedElement VisitConditionalExpression(
ConditionalExpression expr, object data)
{
var cond = expr.Condition.TryAcceptForExpression(this);
var former = expr.TrueExpression.TryAcceptForExpression(this);
var latter = expr.FalseExpression.TryAcceptForExpression(this);
return(UnifiedTernaryExpression.Create(cond, former, latter));
}
public override bool Visit(
UnifiedTernaryExpression element, VisitorArgument arg)
{
var paren = GetRequiredParen(element);
Writer.Write(paren.Item1);
element.Condition.TryAccept(this, arg.Set(Paren));
Writer.Write(" ? ");
element.TrueExpression.TryAccept(this, arg.Set(Paren));
Writer.Write(" : ");
element.FalseExpression.TryAccept(this, arg.Set(Paren));
Writer.Write(paren.Item2);
return false;
}
public override bool Visit(
UnifiedTernaryExpression element, VisitorArgument arg)
{
var paren = GetRequiredParen(element);
Writer.Write(paren.Item1);
element.Condition.TryAccept(this, arg.Set(Paren));
Writer.Write(" ? ");
element.TrueExpression.TryAccept(this, arg.Set(Paren));
Writer.Write(" : ");
element.FalseExpression.TryAccept(this, arg.Set(Paren));
Writer.Write(paren.Item2);
return(false);
}
public static UnifiedExpression CreateConditionalExpression(
XElement node)
{
Contract.Requires(node != null);
Contract.Requires(node.Name() == "conditional_expression");
/*
* conditional_expression
* : logical_or_expression ('?' expression ':' conditional_expression)?
*/
if (node.Elements().Count() == 1)
{
return(CreateLogicalOrExpression(node.FirstElement()));
}
return(UnifiedTernaryExpression.Create(
CreateLogicalOrExpression(node.ElementAt(0)),
CreateExpression(node.NthElement(2)).First(),
CreateConditionalExpression(node.NthElement(4))));
}