public override void Visit(Pass p, ExpressionUsage u)
{
p.Begin(ref Condition, ExpressionUsage.Operand);
Condition.Visit(p, ExpressionUsage.Operand);
p.End(ref Condition, ExpressionUsage.Operand);
p.Begin(ref True, ExpressionUsage.Operand);
True.Visit(p, ExpressionUsage.Operand);
p.End(ref True, ExpressionUsage.Operand);
p.Begin(ref False, ExpressionUsage.Operand);
False.Visit(p, ExpressionUsage.Operand);
p.End(ref False, ExpressionUsage.Operand);
}