![]() ![]() If you're convinced that inline won't work for your use case, there's still a chance you might escape the need of writing a macro! In a lot of cases, macros are used to perform derivation: generating code based on the structure of your data. Here, we will focus on slightly more advanced topics. As an introduction to writing macros, check out my other article, " Starting with Scala 3 macros: a short tutorial". Hence, you might turn to macros: they give you way more power and way more flexibility, at the cost of being more complex to write. Only partial information on data structures is available through Mirrors - for example annotations are not available, and if your data is not a case class, a mirror usually won't be available. It's not possible to inspect code passed as a parameter to an inline method or generate arbitrary code as a result. They are declarative in their nature, hence the possibilities are limited to what is directly supported by the compiler. Inlines can get you so far, but have their limits. The official documentation has more details on how inlines work and what their possibilities are. Through Mirrors, you can inspect data structures, such as case classes and enums. This includes expanding inline def method definitions, simplifying inline if and inline match expressions, or performing inline summon (looking up given/ implicit values). The inline modifier instructs the compiler to evaluate the code at compile-time. Scala 3 offers two basic metaprogramming modes: inlines or macros. The first question to consider is: Do I have to write a macro in the first place? Below, you can find some of the things that we’ve learned along the way. We’ve ported a number of macros from Scala 2 to Scala 3: in quicklens, with Kacper Korban in tapir, with Mateusz Borek and more work is waiting with macwire. ![]() As with every API, it takes getting used to Scala’s compile-time reflection capabilities are no exception. Quicklens can deliver contact lenses anywhere in New Zealand and charge a standard flat fee NZ$10.95 per order, regardless of location.Scala 3 offers a brand new metaprogramming experience with a brand new API. It’s up to you to guarantee your prescription matches your Quicklens order, you’ll find these details on your paper prescription or on the back of your lens box. Yes, you are required to have a valid prescription to order contact lenses online. Return postage costs are the responsibility of the customer.ĭo I need a prescription to order from Quicklens? If you ordered the wrong prescription, unopened lenses in original condition are able to be exchanged to the correct prescription, not returned and refunded. Quicklens accepts PayPal, Visa, Mastercard, American Express, Discover and ANZ bank transfer.Ĭhange of mind returns are unfortunately not available. ![]() What forms of payment does Quicklens accept? Quicklens cannot guarantee that they will be able to accommodate your request. Quicklens are not able to control the delivery date directly, but you may contact the shipping company and ask them to deliver your order on a certain date. They will arrive in the post in just a few days, happy shopping!Ĭan I specify a specific date for delivery? Your discount will be applied and you can continue to enter payment and shipping details to pay for your items. However, if you’re on a mobile then it is just as easy to find the coupon box you need. If you’re on a computer or laptop, then you can find the discount code box to the left of the checkout page: Check out the image below for an example in case you face any difficulty. Now that you have the code copied, simply paste it into the “ Coupon code” label at the checkout. Step 4: Enter the code at the Quicklens checkout Once you’re done browsing and ready to buy, move onto Step 4 for the retrieving your discount. You need this code in order to inform Quicklens to remove part of the cost of your total order.įind the lenses you’d like to purchase at Quicklens and just add them to your cart. Simply copy the code that is presented to you. ![]() For example, if you’re looking for 50% off orders at Quicklens then find the coupon above, and click on Get Coupon to reveal the code. There is always a sale or discount available at Quicklens to be redeemed through us here at Stuff New Zealand Coupons.Ĭhoose the coupon code above that you’d like to redeem. Follow these steps below to save money on your next contact lenses. If you’re looking for a discount on your online purchase at Quicklens then you’ve come to the right place. ![]()
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