public override void Visit(Conditional node)
{
if (node != null)
{
// we have two choices for the conditional. Either:
// 1. we wrap the whole thing in a logical-not operator, which means we also need to
// add parentheses, since conditional is lower-precedence than the logicial not, or
// 2. apply the logical-not to both the true- and false-branches.
// The first is guaranteed 3 additional characters. We have to check the delta for
// each branch and add them together to know how much the second would cost. If it's
// greater than 3, then we just want to not the whole thing.
var notTrue = new LogicalNotVisitor(node.TrueExpression)
{
MinifyBooleans = this.MinifyBooleans
};
var notFalse = new LogicalNotVisitor(node.FalseExpression)
{
MinifyBooleans = this.MinifyBooleans
};
var costNottingBoth = notTrue.Measure() + notFalse.Measure();
if (m_measure)
{
// we're just measuring -- adjust the delta accordingly
// (the lesser of the two options)
m_delta += (costNottingBoth > 3) ? 3 : costNottingBoth;
}
else if (costNottingBoth > 3)
{
// just wrap the whole thing
WrapWithLogicalNot(node);
}
else
{
// less bytes to wrap each branch separately
node.TrueExpression.Accept(this);
node.FalseExpression.Accept(this);
}
}
}
public static void Apply(AstNode node, CodeSettings codeSettings)
{
var logicalNot = new LogicalNotVisitor(node, codeSettings);
logicalNot.Apply();
}