protected IFCommand UpdateIf(IFCommand ifx, Expression check, Expression ifTrue, Expression ifFalse)
{
if (check != ifx.Check || ifTrue != ifx.IfTrue || ifFalse != ifx.IfFalse)
{
return(new IFCommand(check, ifTrue, ifFalse));
}
return(ifx);
}
protected virtual Expression VisitIf(IFCommand ifx)
{
Expression check = Visit(ifx.Check);
Expression ifTrue = Visit(ifx.IfTrue);
Expression ifFalse = Visit(ifx.IfFalse);
return(UpdateIf(ifx, check, ifTrue, ifFalse));
}
protected override Expression VisitIf(IFCommand ifx)
{
ConditionalExpression test = Expression.Condition(ifx.Check, ifx.IfTrue,
ifx.IfFalse != null
? ifx.IfFalse
: ifx.IfTrue.Type == typeof(int)
? Expression.Property(executor, "RowsAffected")
: (Expression)Expression.Constant(TypeHelper.GetDefault(ifx.IfTrue.Type), ifx.IfTrue.Type));
return(Visit(test));
}
protected virtual bool CompareIf(IFCommand x, IFCommand y)
{
return(Compare(x.Check, y.Check) && Compare(x.IfTrue, y.IfTrue) && Compare(x.IfFalse, y.IfFalse));
}
protected override Expression VisitIf(IFCommand ifx)
{
throw new NotSupportedException();
}