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Can someone bring order in these concepts?
type Angles is 0 .. 360;
subtype Acute_Angles is range Angles'First .. 90;
Pascal only has subranges, iirc.
Problem is, web is the new BASIC and many devs will start there and they will see rust first. And where's that ADA game engine ?
ADA can definitely claim tons of successes and very powerful constructs, but mindhsare is clearly not one of its selling points.
- Of my quick scan, only AdaCore supports Ada 2012 (where a lot of the really good stuff is implemented) the rest are stuck on Ada 95.
- None of the vendors seem to list transparent pricing.
If you are only selling based on volume and through a sales rep then you are off the bat excluding most startups, SMEs, and just general bootstrap curious folks.
- Compiler prices
- The few UNIX vendors that supported it like Sun, it was extra on top of C and C++ compilers, why pay more when C and C++ were already in the box
- Hardware requirements
Still, there are around 7 Ada vendors around.
https://www.ghs.com/products/ada_optimizing_compilers.html
https://www.ptc.com/en/products/developer-tools/apexada
https://www.ddci.com/products_score/
http://www.irvine.com/tech.html
It's just a static buffer that you can use for temporary allocations, e.g. to return an array of 50 int32's to a parent stack frame you can just allocate `50*sizeof(int32)` bytes on that buffer and return a pointer to the beginning, instead of a heap-allocated `std::vector<int32>`. Every allocation advances the head of the buffer, so you can have multiple allocations alive at the same time.
Every once in a while you need to free the buffer, which just means resetting its head back to the start - in the case of games the beginning of a new frame is a convenient point to do that.
This doesn't solve dynamic memory in general, as it can't be used for long-lived allocations, it just saves you a bunch of temporary heap allocations. It doesn't solve all problems that RAII does either, as RAII is often used for resources other than memory - files, sockets, locks, ...
[1] https://www.rfleury.com/p/untangling-lifetimes-the-arena-all...
My company’s style guide requires them on closing braces for namespaces.
This regulatory change is not new, it has been going on for years and will take more years to finish. And even without a regulatory pressure, the migration would happen eventually. Look at the cars. As they get more features like adaptive cruise control and various driver assistance features, the need for software that runs with no lag and is reacting to surroundings correctly and quickly becomes absolutely critical. Car companies now can go out of business simply because their software is buggy. The car vendors now produce more software than ever, and they are in dire need for better programming tools than ever.
Languages like Java, Scala, C#, Go, etc. cover many scenarios like cloud services and, for example, car entertainment system. But for devices, microcontrollers, real-time low latency systems etc. C and C++ have been the go-to languages for decades, and now it is starting to change, because turns out it is very, very hard to write correct, bug-free, safe, and secure software in these languages.
Rust is one language that is getting into this market: Rust Foundation established a Safety-Critical Rust Consortium last year, for example, and Ferrocene compiler has a bunch of certifications done already. Ada is another option that would work for many such use-cases, too. The selling point of Ada is that it's been around for a long time and many vendors already have established compilers and tools with all appropriate certifications and qualifications done for all sorts of industries.
So, it's not really "Ada is interesting" and more "Languages that can replace C and C++ are interesting".