public override Node Visit(IfNode n)
{
if (TryMutate(n, out Node newNode))
{
return(newNode);
}
return(base.Visit(n));
}
public virtual void Visit(IfNode n)
{
VisitNode(n.Condition);
VisitNode(n.WhenTrue);
if (n.WhenFalse != null)
{
VisitNode(n.WhenFalse);
}
}
public virtual Node Visit(IfNode n)
{
var cV = VisitNode(n.Condition);
var tV = VisitNode(n.WhenTrue);
var fV = n.WhenFalse != null?VisitNode(n.WhenFalse) : null;
return(cV == n.Condition && tV == n.WhenTrue && fV == n.WhenFalse
? n
: new IfNode(cV, tV, fV));
}
public override void Visit(IfNode n)
{
VisitNode(n.Condition);
if (_result > 0)
{
VisitNode(n.WhenTrue);
}
else
{
VisitNode(n.WhenFalse);
}
}
public override void Visit(IfNode n)
{
NodeCount++;
_buffer.Append(" (");
VisitNode(n.Condition);
_buffer.Append(" ? ");
VisitNode(n.WhenTrue);
_buffer.Append(" : ");
VisitNode(n.WhenFalse);
_buffer.Append(") ");
}
public override Node Visit(IfNode n)
{
var cV = VisitNode(n.Condition);
var tV = VisitNode(n.WhenTrue);
var fV = n.WhenFalse != null?VisitNode(n.WhenFalse) : null;
if (cV is ConstantNode cVC)
{
return(cVC.Value > 0 ? tV : fV);
}
return(cV == n.Condition && tV == n.WhenTrue && fV == n.WhenFalse
? n
: new IfNode(cV, tV, fV));
}
Node ParseCondExpression(StringTokenizer t)
{
var condition = ParseExpression(t);
if (t.Match(TokenType.QuestionMark))
{
var then = ParseCondExpression(t);
if (!t.Match(TokenType.Colon))
{
return(new ErrorNode("Expected : of ternary operator."));
}
var @else = ParseCondExpression(t);
condition = new IfNode(condition, then, @else);
}
return(condition);
}
public override Node Visit(IfNode n)
{
return(base.Visit(n));
}