Re: DCV has a new release.
On Monday, 20 May 2024 at 11:47:25 UTC, Ferhat Kurtulmuş wrote: I've been working on DCV for some years. Recently, DCV has started to be used by some projects, such as etichetta[1]. Even though it's still far from perfect, I think DCV deserves a new version. Existing unit tests pass. New ones are also necessary. Great! With your help etichetta would never have been able to use the AI. I hope DCV will continue evolving. :) Andrea
Etichetta v0.1.3 is here! (with AI)
Hello! I’m excited to announce the release of a new application called “Etichetta”. “Etichetta” is a straightforward program that allows you to label images for AI training. I’ve always found existing programs to be quite cumbersome, so I created one myself. Among its various features is the ability to use a YOLO model to simplify the labeling process by providing suggestions. The project utilizes gtkd for the interface and onnx runtime for AI (without any modifications, thanks to importc!). Special thanks to Ferhat Kurtulmuş for assisting with the onnx-related aspects. There’s a setup available for Windows and an AppImage that runs on any Linux distribution. It seems to work on macOS through docker + xquartz, for the brave ones! GitHub: https://github.com/trikko/etichetta Some super-short how-to videos: https://github.com/trikko/etichetta/blob/main/HOWTO.md Andrea Fontana
Re: Serverino 0.7.0
On Monday, 15 April 2024 at 01:04:40 UTC, aberba wrote: Link to code sample? https://github.com/trikko/serverino/tree/master/examples/06_websocket_noise_stream Andrea
Serverino 0.7.0
Hey Serverino enthusiasts! Get ready to elevate your server game with the latest Serverino 0.7.0 release! ✨ What’s new in this update? WebSockets are here! Now you can enjoy real-time bi-directional communication. Some example I've posted on twitter: https://twitter.com/twittatore/status/1775969115322147165 https://twitter.com/twittatore/status/1776613077053481078 https://twitter.com/twittatore/status/1774827657512841363 Have fun! Andrea
Re: Upcoming ACCU 2024 Talk: How DLang Improves my Modern C++ and Vice Versa
On Monday, 8 April 2024 at 01:38:20 UTC, Mike Shah wrote: I'll be talking more about D (and modern C++) at the ACCU 2024 conference in Bristol (Abstract below -- talk is on April 19, 2024). +1
Re: request assistance resolving curl error
On Tuesday, 26 March 2024 at 07:13:24 UTC, confuzzled wrote: Hello all, I have two scripts. I copied the first directly from the alpaca website and massaged it with etc.c.curl until it compiled in D. The result is that it creates the order and returns the result to stdout. In the second script, I tried to use std.net.curl but cannot get it to work. I think you should use the HTTP interface, did you check this docs? https://dlang.org/phobos/std_net_curl.html#.HTTP https://dlang.org/phobos/std_net_curl.html#.HTTP.addRequestHeader Andrea
Re: Beta 2.108.0
On Thursday, 21 March 2024 at 03:19:16 UTC, Salih Dincer wrote:
On Thursday, 21 March 2024 at 02:14:36 UTC, WebFreak001 wrote:
On Saturday, 2 March 2024 at 17:40:29 UTC, Iain Buclaw wrote:
.. since they drastically make things easier (hexstrings) or
even possible in the first place (magic initializer thingies)
for library code and generated code.
I cannot say the same thing. It is thought-provoking that even
the toHex() function, which should be in std.conv, was not
included and we had to write it ourselves.
SDB@79
This?
```
import std;
void main()
{
int number = 32409;
auto hex = format("%X", number);
writeln(hex);
}
```
or:
```
auto toHex(N)(N number) if (isIntegral!N) { return
"%X".format(number); }
...
auto hex = 3432.toHex();
...
```
Re: DConf Online Livestream Link
On Monday, 18 March 2024 at 11:11:03 UTC, Nick Treleaven wrote: On Sunday, 10 March 2024 at 16:07:23 UTC, Mike Parker wrote: The countdown is on! I'll kick off the DConf Online Livestream at 14:55 UTC on March 16. You can find it here: https://www.youtube.com/live/8GV_TuYk3lk And if you haven't seen the details yet, take a look here: https://dconf.org/2024/online/index.html See you there! This was great, interesting selection of talks. BTW each link to slides is giving me a 404. Luckily the live stream video is still up to rewind :-) https://github.com/dlang/dconf.org/tree/master/2024/online/slides Andrea
Re: Is D programming friendly for beginners?
On Tuesday, 12 March 2024 at 19:12:03 UTC, H. S. Teoh wrote: I don't know how CS programs are carried out these days, but back when I was in university, the choice of language is largely irrelevant, because the whole point of a programming course isn't to teach you a specific language, but to teach you the *principles* that underlie programming in general. There are really only a small handful of different paradigms that you need to learn; once you learned the principles behind them, they can be applied to any language out there. You wouldn't need anyone to teach you a new language then; you could just learn it yourself by applying these same principles. The rest, as they say, is just details. ;-) T I agree. Andrea
Re: Announcing Serverino 0.6.0!
Thank you! Inline replies >>>
On Sunday, 10 March 2024 at 21:04:05 UTC, aberba wrote:
1) I'm not sure I like concat (~=)
style used on `Output output` and how it can determine the
order routes are invoked. I would expect that to be explicitly
defined by Dev using a catch-all route or else the sever
returns 404 by default. That's going to prevent the chances of
invoking the wrong route especially when it does something
important/dangerous/unexpected.
Serverino works with priorities, that's the order the handlers
are called! You're checks on handlers can easily filter request.
2) instead of doing:
```d
if (request.method != Request.Method.Get)
output.status = 405;
```
to determine the request method, why not use a UDA similar to
`@route` ...like `@method(Request.Method.post)`? The use of UDA
is so much cleaner and easier to deal with.
This works as well, indeed:
@route!(r => r.method == Request.Method.Post)
3) would be nice to have an `output.json()` function which both
sets the response header and also calls `output.write()`
Just add content type and you're done!
4. I can't build anything significant in any http server
library without support for middleware. Preferably support for
multiple middlewares functions. A middleware would be a
function that runs after the @onServerInit but BEFORE any route
handler. It will be used to intercept all incoming requests for
things like authentication, rate limiting, CORS, etc.
Preferably provide a way to pass data to the target route e.g.
user session, user permission, etc...like
output.locals.set("userId", 123). The route will then be able
to access this data.
Just use a high priority handler, check the tips on website, for
example user auth.
That's a very clean way to add a layer of Auth, logging and so
on...
All in all, everything else looks good. I would prefer
something like:
```d
void hello (Request req, Response res) {
res.write("hello");
}
```
...but `Output` is also fine... just a small nitpick.
output.write() works as well.
Andrea
Announcing Serverino 0.6.0!
Performance has been boosted once again, and those pesky little bugs? Squashed! Plus, there are fresh examples to try out and even a sleek new logo to admire! Ready to dive in? Just spin up a new project using the provided template: ``` dub init -t serverino my_wonderful_project cd my_wonderful_project dub ``` And voilà! Your hello world will be up and running in **a couple of seconds**! Have fun! Andrea Fontana (I know some of you are already on board, but how many are sailing in secret? Come out of the shadows and let me know! Your feedback is the wind in serverino's sails) Repository: https://github.com/trikko/serverino Docs: https://trikko.github.io/serverino Examples: https://github.com/trikko/serverino/tree/master/examples Tips: https://github.com/trikko/serverino/wiki/
Re: SecureD 3.0 has been released!
On Wednesday, 6 March 2024 at 07:47:04 UTC, Adam Wilson wrote: SecureD 3.0 has been released. This version was set in motion by a Cedric Picard, a D community member with Cryptography experience, reaching out and suggesting a number of improvements to the Symmetric and KDF API's. This resulted in an API for symmetric encryption that improves correctness and security without significantly increasing developer workload. Also improved is the encryption envelope that contains symmetrically encrypted data. Algorithm Changes: - Removed: SHA2-224, AES-OFB - Added: SHA3-224/256/384/512 And I even remembered to update the examples in the README. Future work will focus on using the Operating System provided cryptography where available. Check it out here: https://code.dlang.org/packages/secured Well done Adam! I only miss the docs :) Andrea
Re: First Beta 2.106.0
On Thursday, 2 November 2023 at 00:57:23 UTC, Iain Buclaw wrote: Glad to announce the first beta for the 2.106.0 release, ♥ to the 33 contributors. http://dlang.org/download.html#dmd_beta http://dlang.org/changelog/2.106.0.html As usual please report any bugs at https://issues.dlang.org -Iain on behalf of the Dlang Core Team Static AA init, finally! Great! Andrea
Re: Blog post: How we are using D to develop Aspect from the ground up
On Monday, 23 October 2023 at 19:02:46 UTC, Sönke Ludwig wrote: I've written up an article that showcases how we use D in production and how that benefits us in unique ways. Nice article. I agree with you about the pros and cons of language! Andrea
Re: tshare/1.0 a fast way to share file using transfer.sh
On Wednesday, 11 October 2023 at 14:30:50 UTC, kinke wrote: On Saturday, 7 October 2023 at 22:40:58 UTC, Andrea Fontana wrote: Question: - Is there a way to compile curl statically with ldc for windows? If I try (using -static), it throws a runtime error. Yes; IIRC, you need to link `curl_a.lib` *and* add `curl.exp` (as Phobos tries to find the exported functions in the .exe itself) to the linker cmdline too (both files in the LDC lib dir). You're right! On dub this works: ``` dflags "-link-defaultlib-shared=false" platform="ldc" dflags "-static" platform="windows" lflags "curl_a.lib" "crypt32.lib" "wldap32.lib" "curl.exp" platform="windows" ``` Thank you, Andrea
Re: how to assign multiple variables at once by unpacking array?
On Sunday, 8 October 2023 at 07:44:04 UTC, Andrea Fontana wrote:
```
int a,b,c;
"1,2,3"
.splitter(',')
.zip(only(, , ))
.each!(x => *x[1] = x[0].to!int);
writeln(a, b, c);
```
or:
```
int a,b,c;
only(, , )
.zip("1,2,3".splitter(','))
.each!(x => *x[0] = x[1].to!int);
writeln(a, b, c);
```
Re: how to assign multiple variables at once by unpacking array?
On Saturday, 7 October 2023 at 07:31:45 UTC, mw wrote:
https://stackoverflow.com/questions/47046850/is-there-any-way-to-assign-multiple-variable-at-once-with-dlang
How to do this Python code in D:
```
s = "1 2 3"
A,B,C = map(int, s.split(" "))
A,B,C
(1, 2, 3)
```
Is there a better way (since 2017)?
Ranges for the win!
```
int a,b,c;
"1,2,3"
.splitter(',')
.zip(only(, , ))
.each!(x => *x[1] = x[0].to!int);
writeln(a, b, c);
```
Re: tshare/1.0 a fast way to share file using transfer.sh
On Wednesday, 4 October 2023 at 23:02:39 UTC, Andrea Fontana wrote: I've just released a simple tool for sharing files (similar to WeTransfer) directly from the terminal. News: - Added support for encryption (if gpg is available) - Added binaries built by github - Improved UI Question: - Is there a way to compile curl statically with ldc for windows? If I try (using -static), it throws a runtime error. Andrea
tshare/1.0 a fast way to share file using transfer.sh
I've just released a simple tool for sharing files (similar to WeTransfer) directly from the terminal. Usage is incredibly straightforward: Run ```dub build tshare``` to build the tool. Use ```tshare /your/file``` to share your file, which will generate a public link. For additional options, you can explore by running tshare -h. On GitHub: https://github.com/trikko/tshare Best regards, Andrea
Re: LDC 1.31.0
On Saturday, 11 February 2023 at 13:47:54 UTC, kinke wrote: Glad to announce LDC 1.31.0. Major changes: * Based on D 2.101.2. * ImportC: The C preprocessor isn't invoked yet. * mac/iOS arm64: Linking with `-g` is working again without unaligned pointer warnings/errors. * *Preliminary* support for LLVM 15. Thanks @jamesragray for helping out! * Initial ABI support for 64-bit RISC-V. Thanks @Ast-x64! Full release log and downloads: https://github.com/ldc-developers/ldc/releases/tag/v1.31.0 Thanks to all contributors & sponsors! Build for raspberry pi + debian bullseye: https://github.com/trikko/ldc2-rpi-build/releases/tag/v1.31.0 Andrea Fontana
Re: importC - how to use more effectively?
On Wednesday, 22 February 2023 at 15:00:56 UTC, WebFreak001 wrote: I just first time used importC in a prototype project I just worked on. I used it to just import `libevdev.h` on linux to register a custom input device / make a simple userspace input driver. A suggestion: try tcc as preprocessor. It works better than gcc for importc. Andrea Fontana
Re: Centroid tracking using DCV
On Wednesday, 15 February 2023 at 17:32:33 UTC, Ferhat Kurtulmuş wrote: I heard you are not having fun enough with d today. Do you know you can do things like this with dlang now? After some fiddling with it, my last commits made this possible. how it looks like: https://www.youtube.com/watch?v=ACC_-TDAtqc source code: https://github.com/aferust/oclcv/tree/main/examples/centroidtracking DCV: https://github.com/libmir/dcv Sorry for the potato-quality video. My art director is on vacation. I am cheating a little with OpenCL since things are not fast enough at the moment. Hope you like it. Enjoy! Nice!
Re: LDC 1.31.0-beta1
On Friday, 27 January 2023 at 20:35:01 UTC, kinke wrote: Glad to announce the first beta for LDC 1.31. Major changes: * Based on D 2.101.2. * ImportC: The C preprocessor isn't invoked yet. * mac/iOS arm64: Linking with `-g` is working again without unaligned pointer warnings/errors. * *Preliminary* support for LLVM 15. Thanks @jamesragray for helping out! * Initial ABI support for 64-bit RISC-V. Thanks @Ast-x64! Full release log and downloads: https://github.com/ldc-developers/ldc/releases/tag/v1.31.0-beta1 Please help test, and thanks to all contributors & sponsors! Nice! Can we have a build for linux-arm (rpi)? The last one is oold :) Andrea
Re: Serverino 0.4.0
On Wednesday, 1 February 2023 at 20:01:13 UTC, Andrea Fontana wrote: do you have any plans to do some benchmarks or if you did, please share the place to check it? Here some results from may, but serverino went over a major arch rework after that, so I'm not sure they are still valid. https://github.com/tchaloupka/httpbench If you want to do some benchmarks your welcome! Andrea
Re: Serverino 0.4.0
On Wednesday, 1 February 2023 at 20:01:13 UTC, Andrea Fontana wrote: do you have any plans to do some benchmarks or if you did, please share the place to check it? Here some results from may, but serverino went over a major arch rework after that, so I'm not sure they are still valid. https://github.com/tchaloupka/httpbench If you want to do some benchmarks your welcome! Andrea
Re: Serverino 0.4.0
On Wednesday, 1 February 2023 at 19:49:40 UTC, psyscout wrote: On Wednesday, 1 February 2023 at 17:36:07 UTC, Andrea Fontana wrote: Hi! I've just release a new version of serverino, my pure-D... First of all, thanks for your effort! For the second, I have a couple of simple web services that are require small, simple and fast webapp. So I'm wondering, do you have any plans to do some benchmarks or if you did, please share the place to check it? Someone already did it (with a previous version!). Anyway it's fast enough for real world usage if you're not running a million webpage website on it The company I work for uses it for many small simple and fast webapps! In most cases the bottle neck is not serverino itself, but the code you're putting over it. It works with a daemon and responders, not fibers. So it could be not efficient for long blocking operation. Let's say you want to replace PHP with a better and faster language, that's a good choice :) It's really fast to setup for development and I suggest to put it under nginx if exposed into the wild (easy, explained on github page) Give it a try! Andrea
Serverino 0.4.0
Hi! I've just release a new version of serverino, my pure-D
webserver without 3rd party dependencies, super-fast to compile.
This version is featuring a basic & easy way to add routing using
UDAs.
A big thank you to Ferhat Kurtulmuş that create a pull request
for this :)
Just create a ready-to-go serverino using the project template:
```dub init -t serverino your_server```
And then test the new feature:
```d
import serverino;
mixin ServerinoMain;
@endpoint @route!"/hello/world" // also: @route!(request =>
request.uri == "/hello/world")
void your_request(const Request r, Output o)
{
o ~= "Hello world!";
}
@endpoint @route!(request => r.get.has("item"))
void another_request(const Request r, Output o)
{
o ~= "Item " ~ r.get.read("item");
}
@endpoint @priority(-1)
void this_is_a_fallback(const Request r, Output o)
{
o ~= r.dump();
}
```
More info and docs: https://github.com/trikko/serverino
Re: Serverino 0.3.0 - now with windows support
On Friday, 28 October 2022 at 09:25:11 UTC, Imperatorn wrote: On Friday, 28 October 2022 at 07:42:26 UTC, Andrea Fontana wrote: On Thursday, 27 October 2022 at 19:46:47 UTC, Imperatorn wrote: Nice, sometimes you just need some quick and dirty http That's exactly one of the use cases :) I'm on Windows 10 and your three-liner just worked, thanks Good to know. I have no windows machine, but unit-tests passed on github :) Anyway if you see something strange, keep me posted on github! Andrea
Re: Serverino 0.3.0 - now with windows support
On Thursday, 27 October 2022 at 19:46:47 UTC, Imperatorn wrote: Nice, sometimes you just need some quick and dirty http That's exactly one of the use cases :)
Re: parserino 0.2.0
On Saturday, 22 October 2022 at 22:14:26 UTC, Adam D Ruppe wrote: On Saturday, 22 October 2022 at 21:58:54 UTC, Enjoys Math wrote: Nice! So it's D's answer to Python's BeautifulSoup. D has had a html tag soup parser since 2009 in my dom.d. The parserino might be more html5 compliant specifically though, as mine was written before html5 was a thing. It's been updated with it but still an independent parser (capable of reading in-the-wild html as well as things like xml and even php tags) instead of following their specific algorithm. Ah-ah! Adam is worried Just kidding, he helped me to compile parserino on Windows, so thanks Adam!
Re: parserino 0.2.0
On Thursday, 20 October 2022 at 13:24:27 UTC, psyscout wrote: Wow, it uses builtin browser. Cool! I have a coming project, will try it out. Thank You for your effort! You're welcome :)
parserino 0.2.0
Hello! Finally I released the public version of parserino, a html5 parser for linux, macos and windows. Link: https://github.com/trikko/parserino
Serverino 0.3.0 - now with windows support
Hello there. I've just released a new version of serverino, a simple and ready-to-go http server with zero external dependencies (pure D!). I changed a lot of things under the hood from the last version and tests are welcome. It works on linux, macos and windows. I use only linux, so I didn't test so much on other platforms. I started the project since we need a fast and easy way to setup a server for services, small websites or simply to do some tests on the browser and this is its main focus (but don't worry: it can handle several thousands of requests for seconds) To start a new website just write: ``` dub init test_serverino -t serverino cd test_serverino dub ``` And you're done. More info here: https://github.com/trikko/serverino Andrea
Re: static assert("nothing")
On Tuesday, 31 May 2022 at 09:52:10 UTC, realhet wrote:
On Tuesday, 31 May 2022 at 09:35:30 UTC, Andrea Fontana wrote:
On Tuesday, 31 May 2022 at 08:51:45 UTC, realhet wrote:
Check if that string is init.
assert("", "cool");
assert("ehh", "cool");
assert(string.init, "Not cool");
I feel some "JavaScript equality operator" vibes in this :D
Anyways, I will be extra careful with these.
assert(string.init is null) is the answer :)
Re: static assert("nothing")
On Tuesday, 31 May 2022 at 08:51:45 UTC, realhet wrote:
Hi,
In my framework I just found a dozen of compile time error
handling like:
...else static assert("Invalid type");
This compiles without error. And it was useless for detecting
errors because I forgot the first "false" or "0" parameter.
The first is the assert condition, the message is opt.
I think it is because of the weird case of "every string casted
to bool is true".
string s1;
string s2 = string.init; // Equivalent
string s3 = null; // Equivalent
string s4 = "";
assert(s1, "This fails");
assert(s2, "This fails too");
assert(s3, "This fails too");
assert(s4, "This pass");
There is an example in Phobos also:
https://github.com/dlang/phobos/blob/master/std/uni/package.d
at line 8847: static assert("Unknown normalization form "~norm);
It is easy to make this mistake, but does static assert(string)
has any meaningful use cases?
Check if that string is init.
Andrea
Re: HTTP frameworks benchmark focused on D libraries
On Monday, 30 May 2022 at 20:57:02 UTC, tchaloupka wrote: On Sunday, 29 May 2022 at 06:22:43 UTC, Andrea Fontana wrote: On Thursday, 26 May 2022 at 07:49:23 UTC, tchaloupka wrote: I see there is a test where numbers are identical to arsd ones, is it a typo or a coincidence? Andrea Hi Andrea, it was just a coincidence, straight out copy of the tool results. But as I've found some bugs calculating percentiles from `hey` properly, I've updated the results after the fix. I've also added results for `geario` (thanks #zoujiaqing). For `serverino`, I've added variant that uses 16 worker subprocesses in the pool, that should lead to less blocking and worse per request times in the test environment. Tom Thank's again! Benchmark are always welcome :)
Re: HTTP frameworks benchmark focused on D libraries
On Thursday, 26 May 2022 at 07:49:23 UTC, tchaloupka wrote: Hi, as there are two more HTTP server implementations: * [Serverino](https://forum.dlang.org/thread/bqsatbwjtoobpbzxd...@forum.dlang.org) Thank you! Since it's just a young library that results sounds promising. I'm just working on the next version, focusing on performance enhancement and windows support :) I see there is a test where numbers are identical to arsd ones, is it a typo or a coincidence? Andrea
Re: Release: serverino - please destroy it.
On Sunday, 15 May 2022 at 06:37:08 UTC, frame wrote: On Saturday, 14 May 2022 at 23:23:47 UTC, Andrea Fontana wrote: Which kind of socket exception could be triggered by a client? Andrea It doesn't matter if triggered by a client or not, you need to deal with the possibility. A closed/destroyed socket is an invalid resource. I recently had the scenario on Windows where a client crashed and the socket wasn't closed properly somehow. Now the server adds the socket to the set to see an update - boom! "Socket operation on non-socket" error. Also accepting sockets can throw, for eg. by a stupid network time out error - not only on Windows. Other socket operations are no exceptions either. `isAlive` is fine for properly shutdowned/closed sockets by you or peer. But it doesn't protect you from faulting ones. Ok, added some checks on .select, .accept, .bind, .listen. Thank you. Andrea
Re: Release: serverino - please destroy it.
On Saturday, 14 May 2022 at 20:44:54 UTC, frame wrote: Take care of socket exceptions - especially if you want to make a port to Windows. You should always expect one. It's not enough to test `Socket.isAlive` - a client socket may be faulty and any illegal socket operation throws and kills your loop. Even if `isAlive` works as expected, it may changes the status before you have add the socket to the set. You don't want your server to crash if a client misbehaves. Which kind of socket exception could be triggered by a client? Andrea
Re: Release: serverino - please destroy it.
On Thursday, 12 May 2022 at 11:46:05 UTC, Guillaume Piolat wrote: On Thursday, 12 May 2022 at 11:33:07 UTC, Andrea Fontana wrote: Does dmd/rdmd work? Serverino uses std.net.curl just for running its unittests, so maybe that bug is not blocking. Well tbh, the simple fact that I would have to use WSL is a blocker for me. AFAIK vibe or cgi.d do not require that. Yay. I need a Windows machine (or someone with it!) to rewrite some POSIX parts. For example the part that send/receive the file descriptor (of a socket) from the master process to the worker (windows has its own API for this)
Re: Release: serverino - please destroy it.
On Thursday, 12 May 2022 at 10:26:28 UTC, Guillaume Piolat wrote: On Sunday, 8 May 2022 at 21:45:28 UTC, Andrea Fontana wrote: If you can test it on windows with WSL, that would be appreciated a lot! I tried to test servrino on WSL, but dub doesn't run on WSL. => https://github.com/dlang/dub/issues/2249 Hey thanks for your support! Too bad dub doesn't work with wsl, it sounds like a lost opportunity. Does dmd/rdmd work? Serverino uses std.net.curl just for running its unittests, so maybe that bug is not blocking. Andrea
Re: Release: serverino - please destroy it.
On Wednesday, 11 May 2022 at 06:50:37 UTC, Orfeo wrote: well done Andrea! (forum begins to be too crowded with Italians :) ) --- Orfeo We all miss the good old bearophile! I think the most active italian in this forum. Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 21:24:46 UTC, Paolo Invernizzi wrote: Here I am ... Milanese: https://www.deepglance.com/about /Paolo Ok it's me getting old! Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 20:13:45 UTC, Paolo Invernizzi wrote: Sinceramente non ricordo di averlo scritto, ma alla mia eta ... probabilmente dimentico qualcosa ... comunque piacere! E' bello vedere altri italiani apprezzare questo magnifico linguaggio! (Frankly speaking, I don't remember to have written that, but hey, I'm getting old ... probably I'm forgetting something ... anyway nice to meet you! It's great to see Italians here enjoying this great programming language!) I wonder if you're making a fool of me. Or maybe it's me who is getting old. I'm pretty sure that there's a user here with a really Italian name who was born somewhere in South America. Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 19:50:08 UTC, Paolo Invernizzi wrote: Concordo ... (I agree!) :-P Wait, you have always said you're not Italian. Have you changed your mind? Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 18:33:18 UTC, Sebastiaan Koppe wrote:
On Tuesday, 10 May 2022 at 10:49:06 UTC, Andrea Fontana wrote:
On Tuesday, 10 May 2022 at 08:32:15 UTC, Sebastiaan Koppe
wrote:
The difference is that with the route uda you can *only* map
routes 1:1 exhaustively. With your approach it is up to the
programmer to avoid errors. It is also hard to reason about
the flow of requests through all those functions, and you
have to look at the body of them to determine what will
happen.
Sorry I don't follow you
It is simple, since all your handler are effectively chained,
any error in any one of them can cause later ones to fail or
misbehave. This decreases locality and increases the things you
have to reason about.
Not sure. What if your uda (regex) match is too permissive? Is
that different?
My code evaluates workers in order, just like yours, no?
Maybe I can enable some log if set on config, to track what's
happening. That could help you to debug if something goes wrong.
There are other benefits to uda tagged endpoints too, for
example they are easier to nest, or to programmatically
generate them. In vibe-d I added the default option of
generating OPTION handlers for every regular endpoint. This is
required for CORS.
@endpoint void func(...){
if(req.method == Method.OPTION){
// THIS RUN FOR EVERY ENDPOINT
}
}
In any case if you want to use a different routing strategy
it's quite easy. I really don't like libraries that force you
to use their own style/way.
That is good.
Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 16:47:13 UTC, Ola Fosheim Grøstad wrote: On Tuesday, 10 May 2022 at 16:05:11 UTC, Andrea Fontana wrote: Oh, italian is full of suffixes. -ello means a slightly different thing. It's small but sounds like a bit pejorative. Oh, and I loved the sound of it… suggests immaturity, perhaps? (I love the -ello and -ella endings. «Bambinella» is one of my favourite words, turns out it is a fruit too!) Maybe bambinetto is more about immaturity. Bambinuccio is cute. Bambinaccio is bad. Bambinone is big (an adult that behave like a child). -ello doesn't sound good with bambino, but it's very similar to -etto. Good luck :)
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 15:35:35 UTC, Ola Fosheim Grøstad wrote: On Tuesday, 10 May 2022 at 15:27:48 UTC, Andrea Fontana wrote: Indeed the "-ino" suffix in "serverino" stands for "small" in italian. :) Bambino > bambinello? So, the embedded-version could be «serverinello»? :O) Oh, italian is full of suffixes. -ello means a slightly different thing. It's small but sounds like a bit pejorative. -ino in bambino is not (anymore) a suffix, anyway. Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 15:16:22 UTC, Ola Fosheim Grøstad wrote: On Tuesday, 10 May 2022 at 15:00:06 UTC, Andrea Fontana wrote: I work in the R and every single time I even have to write a small api or a simple html interface to control some strange machine I think "omg, I have to set nginx agaain". Good point, there are more application areas than regular websites. Embedded remote applications could be another application area where you want something simple with HTTPS (monitoring webcams, sensors, solar panels, supervising farming houses or whatever). Indeed the "-ino" suffix in "serverino" stands for "small" in italian. :) Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 15:01:43 UTC, Adam Ruppe wrote: On Monday, 9 May 2022 at 19:20:27 UTC, Andrea Fontana wrote: Thank you. Looking forward to getting feedback, bug reports and help :) BTW I'm curious, what made you not want to use my cgi.d which has similar capabilities? I was really tempted to start from that! But it's difficult to fork and edit a 11kloc project like that :) I had yet developed fastcgi and scgi code in the past so I've reused some code and it didn't take so much time to get to serverino. Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 13:15:38 UTC, Ola Fosheim Grøstad wrote: On Tuesday, 10 May 2022 at 12:52:01 UTC, Andrea Fontana wrote: I'm running a whole website in D using fastcgi and we have no problem at all, it's blazing fast. But it's not so easy to setup as serverino :) Easy setup is probably the number one reason people land on a specific web-tech, so it is the best initial angle, I agree. (By version 3.x you know what the practical weak spots are and can rethink the bottom layer.) Right. But it's not just marketing. I work in the R and every single time I even have to write a small api or a simple html interface to control some strange machine I think "omg, I have to set nginx agaain". It's pretty annoying especially if you're working on shared aws machine. (I know, docker & c. Exist, but they take a lot to setup and they are heavy for some simple api). I'm going to love serverino in the next months :)
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 13:34:27 UTC, Adam D Ruppe wrote:
On Monday, 9 May 2022 at 20:37:50 UTC, Andrea Fontana wrote:
The same goes for cgi/fastcgi/scgi and so on.
Well, cgi does one process per request, so there is no worker
pool (it is the original "serverless" lol).
fastcgi is interesting because the Apache module for it will
actually start and stop worker processes as-needed. I don't
think the the nginx impl does that though.
Some daemons can manage this by themselves (once again: check
php-fpm "dynamic" setting).
Serverino can do it as well. You can set in configuration the max
and min number of workers. It's easy:
```
@onServerInit auto setup()
{
ServerinoConfig sc = ServerinoConfig.create();
sc.setMinWorkers(5);
sc.setMaxWorkers(100);
return sc;
}
```
If all workers are busy the daemon will launch a new one. You
might be interested in
setMaxWorkerLifetime() and sc.setMaxWorkerIdling() too!
But the nicest thing about all these application models is if
you write it in the right way, you can swap out the approach,
either transparently adding the i/o event waits or just adding
additional servers without touching the application code.
That's a lot harder to do when you expect shared state etc.
like other things encourage.
I would mention that if something goes wrong and a process crash
or get caught in an infinite loop, it's not a problem. Process is
killed and wake up again without pull all the server down.
Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 12:31:23 UTC, Ola Fosheim Grøstad wrote: On Tuesday, 10 May 2022 at 10:49:06 UTC, Andrea Fontana wrote: And you can still handle 700k/views per hour with 20 workers! Requests tend to come in bursts from the same client, thanks to clunky javascript APIs and clutters of resources (and careless web developers). For a typical D user ease-of-use is probably more important at this point, though, so good luck with your project! In my opnioni IRL that's not a big problem as it can seem. Again: that's just how nginx and apache handle php/cgi/fcgi/scgi requests. Wikipedia runs wikimedia software. Written in php. Running on apache with php-fpm (and cache!). And I'm not suggesting to run wikipedia on serverino, *for now*. If you try to open a lot of wikipedia pages at the same time in a burst, they will be served (probably using keep-alive connection) not in parallel: you're queued. And the 99.9% of users will never notice this. Is it a problem? If you need much control, you can use an http accelerator and/or you can use a reverse proxy (like nginx) to control bursts et similia. I'm running a whole website in D using fastcgi and we have no problem at all, it's blazing fast. But it's not so easy to setup as serverino :) Andrea
Re: Release: serverino - please destroy it.
On Tuesday, 10 May 2022 at 08:32:15 UTC, Sebastiaan Koppe wrote:
On Monday, 9 May 2022 at 20:37:50 UTC, Andrea Fontana wrote:
On Monday, 9 May 2022 at 20:08:38 UTC, Sebastiaan Koppe wrote:
As an example, how many requests per second can you manage if
all requests have to wait 100 msecs?
For non critical workload you will probably still hit good
enough performance though.
Firstly, it depends on how many workers you have.
Then you should consider that a lot of (most?) websites use
php-fpm, that works using the same approach (but php is much
slower than D). The same goes for cgi/fastcgi/scgi and so on.
Let's say you have just 20 workers. 100msecs for each request
(a lot of time for my standards, I would say). That means
20*10 = 200 webpages/s = 720k pages/h. I don't think your
website has so much traffic...
And I hope not every request will take 100msecs!
100msecs is on the upper end for sure, but if you add a
database, external service call, etc. it is not uncommon to
reach that.
And you can still handle 700k/views per hour with 20 workers!
The point however, is that the architecture breaks down because
it is unable to do work concurrently. Every requests blocks a
worker from start to finish.
Unless it is CPU heavy the system will be under utilized. That
is not necessarily bad though. The simplicity has something
going for it, but it is definitely a tradeoff that you should
consider highlighting.
Every server has its own target. BTW, I'm not developing
serverino to use it as a building block of a CDN.
In real-life projects, I think you can use it without any problem
for not-huge projects.
You can also put it under a reverse proxy (f.e. nginx), to handle
just the requests you need to write in D.
The difference is that with the route uda you can *only* map
routes 1:1 exhaustively. With your approach it is up to the
programmer to avoid errors. It is also hard to reason about the
flow of requests through all those functions, and you have to
look at the body of them to determine what will happen.
Sorry I don't follow you: I don't know which framework you're
using, but if you're using UDA with matches (something like:
@matchUri("/main") void renderMain(...) { ... }) you still have
to check all the functions if a request is not handled correctly.
Or am I missing something?
Using my approach if you want to check which functions escape
from routing you can just add a catch-all endpoint with low
priority.
```
@priority(-1000) @endpoint
void wtf(Request r, Output o)
{
fatal("Request NOT HANDLED: ", r.dump());
}
```
And if a request doesn't match your UDA constraint, how do you
debug what's wrong with it? I think it's easier to add a
checkpoint/log on the first lines of your functions body to guess
why the function is skipped.
In any case if you want to use a different routing strategy it's
quite easy. I really don't like libraries that force you to use
their own style/way.
So you can even drop my UDAs and write the app like this. It
still works:
```
mixin ServerinoMain;
void entry(Request r, Output o)
{
// Use your routing strategy here
// ...
// YourRouter router;
// router.do(r, "/hello/world", );
// router.do(r, "/bla", );
}
```
Andrea
Re: Release: serverino - please destroy it.
On Monday, 9 May 2022 at 20:08:38 UTC, Sebastiaan Koppe wrote:
On Sunday, 8 May 2022 at 21:32:42 UTC, Andrea Fontana wrote:
Every request is processed by a worker running in an isolated
process, no fibers/threads, sorry (or thanks?)
I did some tests and the performance sounds good: on a local
machine it can handle more than 100_000 reqs/sec for a simple
page containing just "hello world!".Of course that's not a
good benchmark, if you can help me with other benchmarks it
would be much appreciated (a big thanks to Tomáš Chaloupka who
did some tests!)
Typically server applications are IO heavy. I expect your
isolated-process approach to break down with that kind of work.
I know. We all know :) Benchmarks are just benchmarks. They are
useful to understand how much overhead your server adds to the
whole project. These benchmarks are made in the local machine,
with almost no connection overhead.
Not every application is IO heavy, anyway.
As an example, how many requests per second can you manage if
all requests have to wait 100 msecs?
For non critical workload you will probably still hit good
enough performance though.
Firstly, it depends on how many workers you have.
Then you should consider that a lot of (most?) websites use
php-fpm, that works using the same approach (but php is much
slower than D). The same goes for cgi/fastcgi/scgi and so on.
Let's say you have just 20 workers. 100msecs for each request (a
lot of time for my standards, I would say). That means 20*10 =
200 webpages/s = 720k pages/h. I don't think your website has so
much traffic...
And I hope not every request will take 100msecs!
Instead of using a lot of different UDAs to set routing rules,
you can simply write them in your endpoint's body and exit
from it to pass to the next endpoint.
My experience is that exhaustive matching is easier to reason
about at larger scale.
Yes, but exactly the same thing can be done without uda.
```
@endpoint void my_end(Request r, Output o)
{
if (r.uri == "/asd") // or whatever you want: regex, or
checking another field
return false; //
}
```
This is just like:
```
@matchuda(uri, "/asd") void my_end() { ... }
```
What's the difference? The first one is much more flexible, IMHO.
Please help me testing it, I'm looking forward to receiving
your shiny new issues on github.
I noticed it has zero unittests, that is probably a good place
to start.
Of course! They will come for sure. :)
Andrea
Re: Release: serverino - please destroy it.
On Monday, 9 May 2022 at 19:09:40 UTC, Guillaume Piolat wrote: On Sunday, 8 May 2022 at 21:32:42 UTC, Andrea Fontana wrote: Hello! I've just released serverino. It's a small & ready-to-go http/https server. Dub package: https://code.dlang.org/packages/serverino Andrea Looks very useful, congratulations! Thank you. Looking forward to getting feedback, bug reports and help :) Andrea
Re: Release: serverino - please destroy it.
On Sunday, 8 May 2022 at 22:09:37 UTC, Ali Çehreli wrote: Congratulations! :) Looking forward to watching your presentation at DConf... ;) I wish I was able to speak publicly in English in front of an audience :) On 5/8/22 14:32, Andrea Fontana wrote: > Every request is processed by a worker running in an isolated process, > no fibers/threads, sorry (or thanks?) That effectively uses multiple GCs. I always suspected that approach would provide better latency. I think it depends on what your server is doing, anyway. > sending opened file descriptors between processes thru sockets I sent a pull request (merged!) for druntime to make this work on macOS too! Sweet! Ali
Re: Release: serverino - please destroy it.
On Sunday, 8 May 2022 at 21:32:42 UTC, Andrea Fontana wrote: [...] Andrea Whoops, I forgot a couple of things. This was tested on linux only and it should work fine on other posix systems (macOS included!). I don't have windows, but I think you need WSL to run it, since I'm using a lot of strange posix tricks to keep performace at a good level (like sending opened file descriptors between processes thru sockets). If you can test it on windows with WSL, that would be appreciated a lot! Andrea
Release: serverino - please destroy it.
Hello! I've just released serverino. It's a small & ready-to-go http/https server. Every request is processed by a worker running in an isolated process, no fibers/threads, sorry (or thanks?) I did some tests and the performance sounds good: on a local machine it can handle more than 100_000 reqs/sec for a simple page containing just "hello world!".Of course that's not a good benchmark, if you can help me with other benchmarks it would be much appreciated (a big thanks to Tomáš Chaloupka who did some tests!) I'm trying to keep it simple and easy to compile. It has no external deps in its base configuration and only one external library (libretls) is required if you need/want to enable https. For your first project you need just three lines of code as you can see here: https://github.com/trikko/serverino/ I didn't implement a traditional router for uris as probably many of you expected. I use a different approach. Check out this example: https://github.com/trikko/serverino/#defining-more-than-one-endpoint This allows you to do some interesting things giving higher or lower priority to each endpoint (for example you can force something to always running first like redirect, logging, checks on login...) Instead of using a lot of different UDAs to set routing rules, you can simply write them in your endpoint's body and exit from it to pass to the next endpoint. Please help me testing it, I'm looking forward to receiving your shiny new issues on github. Dub package: https://code.dlang.org/packages/serverino Andrea
Re: GCC 12.1 Released (D v2.100-rc.1)
On Friday, 6 May 2022 at 11:57:47 UTC, Iain Buclaw wrote: Hi, I am proud to announce another major GCC release, 12.1. [...] Regards, Iain. Great!
Re: CTFE and BetterC compatibility
On Wednesday, 27 April 2022 at 14:21:15 UTC, Claude wrote: data.digits ~= parseDigit(str[0]); Dynamic arrays are not supported using -betterC Andrea
Re: mysql-native v3.2.0 - the safe update
On Saturday, 23 April 2022 at 05:12:30 UTC, Steven Schveighoffer wrote: This is a huge huge update. I've never done anything like this before, but I think it works as a drop-in replacement, while allowing you to migrate any piece you wish from unsafe code to safe code. Please let me know if there are *any* problems you find with this. Well done Steven! Note this does *not* build with dip1000, because the two underlying libraries (Phobos sockets and vibe.d) do not build as safe with dip1000. Dip1000 is marked as "superseded". I don't understand what the plan is. Andrea
Re: How to print or check if a string is "\0" (null) terminated in the D programming language?
On Wednesday, 6 April 2022 at 08:55:43 UTC, BoQsc wrote: I have a feeling that some parts of my code contains unterminated strings and they do overflow into other string that is to be combined. I'd like to take a look at strings, analyse them manually and see if any of them end up terminated or not. Please provide any relevant examples of how you do this. string literals are zero-terminated in d. If you need to pass a D string to a C function use toStringz() https://dlang.org/library/std/string/to_stringz.html
Re: Added copy constructors to "Programming in D"
On Saturday, 8 January 2022 at 13:23:52 UTC, Imperatorn wrote: On Saturday, 8 January 2022 at 02:07:10 UTC, Ali Çehreli wrote: 1) After about three years, I finally added copy constructors: http://ddili.org/ders/d.en/special_functions.html#ix_special_functions.copy%20constructor [...] Splendid! Will the physical book also be updated? Thanks! I don't think it is possible. You have to buy a new copy when published. /s
Re: D Language Foundation Monthly Meeting Summary (September 24, 2021)
On Wednesday, 6 October 2021 at 06:23:01 UTC, WebFreak001 wrote: On Friday, 1 October 2021 at 12:32:20 UTC, Mike Parker wrote: [...] new slogan [...] want to generate controversial heat? Do it in D (DIID) (careful with there being a trademark for DiiD though) You mean: Just D it
Re: how to enable safeD ? dmd.conf ? dmd switch ?
On Tuesday, 8 June 2021 at 02:47:18 UTC, someone wrote: https://dlang.org/articles/safed.html https://dlang.org/dmd-linux.html#switches http://ddili.org/ders/d.en/functions_more.html Neither man dmd nor man dmd.conf appear to have a related/switch setting. Does it means safeD is achieved by placing @safe attributes all over the place ? Or is it achieved by setting some global switch elsewhere ? Am I missing something ? Just mark main() function with @safe and you're done.
Re: (Oh My) Gentool 0.4.0 released
On Sunday, 6 June 2021 at 10:03:11 UTC, evilrat wrote: ## (oh my) gentool v0.4 is now out. It is my fancy tool to generate extern(C++) stuff quicker, it takes regular compiler flags that you usually pass to clang and translates C/C++ code to D. This release has one new feature: support pragma mangle on aggregates (class, struct, etc...). Also a lot of work was put into template support, but it is still has lots of unhandled cases, so do not expect it will translate STL or Boost without need of manual fixes. Source https://github.com/Superbelko/ohmygentool Windows binaries https://github.com/Superbelko/ohmygentool/releases/tag/v0.4.0 Nice work. Is there a docker somewhere in order to test it?
Re: D + raylib = BlobEditor
On Wednesday, 4 November 2020 at 07:45:46 UTC, Ferhat Kurtulmuş wrote: looks so funny. As if an alien material is trying to grow and eat worlds. Yes. But it's so relaxing, isn't it?
D + raylib = BlobEditor
Hello. I've just published a small toy/demo project. I use D and raylib to create and render a blob in real time. Here a video: https://www.youtube.com/watch?v=RIVDdXV6D-A Here the source: https://github.com/trikko/BlobEditor It runs fine on my 7yo laptop. Andrea
Re: bindbc-sfml 0.1.0
On Monday, 2 November 2020 at 11:01:53 UTC, Mike Parker wrote: I've finally gotten around to finishing up the port of DerelictSFML2 to BindBC: http://bindbc-sfml.dub.pm/ +1 Great job Mike!
Re: MetaCall Polyglot is now available form D
On Tuesday, 4 August 2020 at 22:25:19 UTC, Vicente Eduardo Ferrer Garcia wrote: [...] If someone is interested in the D port you can find the source here: https://github.com/metacall/dlang-port Nice! Maybe you can use a bit of syntax sugar for D. Check this example: https://run.dlang.io/is/TKkmbe Andrea
Re: Idiomatic D code to avoid or detect devision by zero
On Friday, 31 July 2020 at 13:55:18 UTC, Martin Tschierschke wrote: What would be the idiomatic way to write a floating point division occuring inside a loop and handle the case of division by zero. c = a/b; // b might be zero sometimes, than set c to an other value (d). (In the moment I check the divisor being zero or not, with an if-than-else structure, but I find it ugly and so I ask here.) You should give a look at: https://dlang.org/phobos/std_experimental_checkedint.html You can try with checked!Throw and catch exceptions, for example. Andrea
Re: Origins of the D Programming Language now published by ACM!
On Saturday, 20 June 2020 at 22:12:21 UTC, Walter Bright wrote: On 6/20/2020 2:59 PM, Bill Baxter wrote: Whoa! Page 23 -- a wild Bill Baxter appears! That was unexpected. :-D --bb So many contributors - we tried hard to credit where things came from. Nice paper. It would be nice to have a graphical timeline with most important additions/dips :) Andrea
Re: in not working for arrays is silly, change my view
On Saturday, 29 February 2020 at 20:11:24 UTC, Steven Schveighoffer wrote: 1. in is supposed to be O(lg(n)) or better. Generic code may depend on this property. Searching an array is O(n). Probably it should work if we're using a "SortedRange". int[] a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]; auto p = assumeSorted(a); assert(3 in p);
Re: How to sum multidimensional arrays?
On Thursday, 27 February 2020 at 14:15:26 UTC, p.shkadzko wrote:
void main() {
int[][] m1 = rndMatrix(10, 2, 3);
int[][] m2 = rndMatrix(10, 2, 3);
auto c = m1[] + m2[];
}
I think you're trying to do this:
int[][] m1 = rndMatrix(10, 2, 3);
int[][] m2 = rndMatrix(10, 2, 3);
int[][] m3;
m3.length = m1.length;
foreach(i; 0..m1.length)
{
m3[i].length = m1[i].length;
m3[i][] = m1[i][] + m2[i][];
}
But of course that's not the best solution :)
Re: Earcut polygon triangulation
On Monday, 24 February 2020 at 20:28:20 UTC, Ben Jones wrote: On Monday, 24 February 2020 at 19:15:13 UTC, JN wrote: On Sunday, 23 February 2020 at 16:20:09 UTC, Ahmet Sait wrote: Out of curiosity, why would you need to triangulate polygons instead of using stencil buffer? I'm assuming you're using OpenGL (or something similar) since you talked about your hobby game. Any advantage of triangulating shapes? (anti-aliasing maybe?) Triangulation goes beyond rendering. I imagine this library might be useful when making a level editor for a DOOM-like 2.5D engine. It's very poorly documented, but I wrote a delaunay refinement triangulator: https://github.com/benjones/dtriangulate . It's mostly a reimplementation of Shewchuk's Triangle which is probably the most common delaunay triangulator. Both of these libraries would have been useful a year ago when I was writing my 3d printable vases generator in D :)
Re: The good old CGI
On Saturday, 15 February 2020 at 22:06:42 UTC, Tier wrote: It might not change the world, but I'm going to try it regardless. So thank you! You're welcome :) P.S. I know you made an scgi client. Do you plan on making a fcgi one too? I don't like fastcgi protocol that much. I think scgi is equivalent but it is much easier to parse :) Andrea
The good old CGI
I've just released [1] a simple single-file-library you can use to build cgi-enabled app with d. Not a big innovation, so I don't expect a lot of interest about it. Anyway it's small and light, so it's a fast (not so efficient) way to run web-based scripts. Check the basic example [2] and the docs [3]. Andrea Fontana [1] https://code.dlang.org/packages/dcgi [2] https://github.com/2night/dcgi [3] https://dcgi.dpldocs.info/dcgi.html
Re: Error on using regex in dmd v2.088.1
On Monday, 3 February 2020 at 07:11:34 UTC, Dharmil Patel wrote: On Monday, 3 February 2020 at 07:03:03 UTC, Dharmil Patel wrote: In my code I am using regex like this: auto rgxComma = regex(r","); On compiling with dmd v2.076.1, it compiles successfully, but on compiling with dmd v2.088.1, I am getting lots of errors like: /src/phobos/std/regex/internal/thompson.d-mixin-836(837): Error: template instance std.regex.internal.thompson.ThompsonOps!(EngineType!(char, Input!char), State, true).op!cast(IR)164u error instantiating Can someone please help me solve this error? Thanks Dharmil Hi Dharmil! It works for me using 2.088.1 with docker. Are you sure your installation is ok? Andrea
Re: format with floating points GC allocating in DMD 2.090
On Friday, 31 January 2020 at 08:45:55 UTC, bauss wrote:
On Friday, 31 January 2020 at 07:20:17 UTC, cc wrote:
char[4096] buf;
writeln(GC.stats.usedSize);
foreach (i; 0 .. 10) {
sformat(buf, "%f", 1.234f);
writeln(GC.stats.usedSize);
}
Report it as a bug because it's definitely a bug and there was
changes to the GC in 2.090.0
2.086 x64 on linux:
0
64
112
160
208
256
304
352
400
448
496
Re: Release D 2.090.0
On Tuesday, 7 January 2020 at 11:12:09 UTC, JN wrote: Loving the JSON getter :) Did you give jsonwrap[1] a try? [1] https://code.dlang.org/packages/jsonwrap
Re: code.dlang.org downtime
On Wednesday, 18 December 2019 at 09:29:50 UTC, John Colvin wrote: This is still down for me, regardless of using the IP or address. I don't think it's just me either: https://stats.uptimerobot.com/6mQX4Crw2L/783838659 https://downforeveryoneorjustme.com/code.dlang.org Connection timeout here.
Re: code.dlang.org downtime
On Wednesday, 18 December 2019 at 11:03:04 UTC, Andrea Fontana wrote: On Wednesday, 18 December 2019 at 09:29:50 UTC, John Colvin wrote: This is still down for me, regardless of using the IP or address. I don't think it's just me either: https://stats.uptimerobot.com/6mQX4Crw2L/783838659 https://downforeveryoneorjustme.com/code.dlang.org Connection timeout here. Just said. Up now.
Re: How to create a custom max() function without the ambiguity error.
On Friday, 6 December 2019 at 12:34:17 UTC, realhet wrote:
Hi,
I'm trying to use a popular function name "max", and extend it
for my special types:
For example:
module utils;
MyType max(in MyType a, in MyType a){...} //static function
struct V3f{
V3f max(in V2f b){...} //member function
}
module gl3n;
vec3 max(in vec3 a, in vec3 a) //another static function in
different module
I also want to use std.algorithm.comparison.max as well.
I know that the ambiguity error can be avoided by public
importing all the various max implementations into one place,
but how to do this when I want to use 3 modules? Need a 4th
module to combine them all? Is there a nicer way?
Another question that is it possible to extend the the template
function "to" in more than one module and use it easily from my
main project modules?
What about:
int max(int a, int b){ return 0; }
void main()
{
.max(3,4).writeln; // 0
std.algorithm.comparison.max(3,4).writeln; // 4
}
Re: Slice/Substr [0..?lastIndexOf(".")] How refer itself without create a variable?
On Thursday, 5 December 2019 at 11:28:51 UTC, Marcone wrote:
Simple example:
writeln("Hi\nHow are
you?\nGood".splitLines()[0][0..?lastIndexOf(r"\")]);
How to refer to this string in lastIndexOf() without create a
variable?
Thank you.
One solution:
writeln(
"Hello\nHow are you?\nGood"
.splitLines()
.map!(x => x[0..x.lastIndexOf("o")])
);
But be careful: lastIndexOf could be < 0 if string is not found.
Re: Unexpectedly nice case of auto return type
On Tuesday, 3 December 2019 at 09:48:39 UTC, Basile B. wrote: You see what surprises me here is that we cannot express the special type that is `TypeNull` and that can only have one value (`null`) so instead we have to use `auto` or `typeof(null)`. You can still create an alias anyway :) alias TypeNull = typeof(null);
Re: Unexpectedly nice case of auto return type
On Tuesday, 3 December 2019 at 07:24:31 UTC, Basile B. wrote:
A testA()
{
return alwaysReturnNull(); // Tnull can be implictly
converted to A
}
still nice tho.
Why not [1]?
[1] typeof(null) alwaysReturnNull() { ... }
Andrea
Re: static assert(version(x)) ?
On Tuesday, 26 November 2019 at 10:24:00 UTC, Robert M. Münch
wrote:
How can I write something like this to check if any of a set of
specific versions is used?
static assert(!(version(a) | version(b) | version(c)):
The problem is that I can use version(a) like a test, and the
symbol a is not accessbile from assert (different,
non-accessible namespace).
version(A) { enum isA = true; } else { enum isA = false; }
version(B) { enum isB = true; } else { enum isB = false; }
static assert(!(isA || isB));
Re: wiki tutorial: D on esp32/esp8266(llvm-xtensa+ldc) and how to get started
On Tuesday, 26 November 2019 at 08:57:49 UTC, dangbinghoo wrote: hi, I just added a simple tutorial to running D betterC on the popular ESP32/esp8266 IoT chip. referenced with the Rust community's Rust on ESP32. https://wiki.dlang.org/D_on_esp32/esp8266(llvm-xtensa%2Bldc)_and_how_to_get_started As esp32 IDF is using newlib as it's libc, the druntime and phobos just simply won't build. But betterC seems working, I didn't do with a very strong test(actually I don't know if there's betterC test case exists), so, just for fun with your own risk! And, Can we do some work to support druntime building against with newlib? If this is true, many MCU would have(newlib supports many MCUs) a `real D` running on it. --- Binghoo Dang That's great!
Re: Anything like HPPTOD out there?
On Monday, 25 November 2019 at 16:35:21 UTC, ParticlePeter wrote: I would like to auto convert c++ header to d module. Is there some project aiming for this? I know of VisualD c++ to d conversion wizzard [1] and LLVM tooling based CPP2D [2], both of them aiming for whole cpp conversion. But I a searching for something lightweight like HTOD extended to C++. [1] https://rainers.github.io/visuald/visuald/CppConversion.html [2] https://github.com/lhamot/CPP2D Give DPP[1] a try! [1] https://github.com/atilaneves/dpp
Re: What is the point of a synchronized lock on a single return statement?
On Monday, 25 November 2019 at 09:24:43 UTC, Jonathan M Davis
wrote:
On Monday, November 25, 2019 1:22:17 AM MST Andrej Mitrovic via
Digitalmars- d-learn wrote:
From:
https://github.com/dlang/phobos/blob/10b9174ddcadac52f6a1ea532deab3310d3a8 c03/std/concurrency.d#L1913-L1916:
-
///
final @property bool isClosed() @safe @nogc pure
{
synchronized (m_lock)
{
return m_closed;
}
}
-
I don't understand the purpose of this lock. The lock will be
released as soon as the function returns, and it returns a
copy of a boolean anyway. Am I missing something here?
It ensures that no other code that locks m_lock is running when
m_closed is accessed. I'd have to study std.concurrency in
detail to know for sure why that would be needed, but it's not
atypical when trying to maintain consistent state when multiple
threads are interacting with each other.
- Jonathan M Davis
Probably to be sure to have a consistent status returned. See for
example:
https://github.com/dlang/phobos/blob/10b9174ddcadac52f6a1ea532deab3310d3a8c03/std/concurrency.d#L2250
Re: Release D 2.089.0
On Thursday, 7 November 2019 at 16:37:56 UTC, Andrea Fontana wrote: On Sunday, 3 November 2019 at 13:35:36 UTC, Martin Nowak wrote: Glad to announce D 2.089.0, ♥ to the 44 contributors. This release comes with corrected extern(C) mangling in mixin templates, atomicFetchAdd and atomicFetchSub in core.atomic, support for link driver arguments, better support of LDC in dub, and plenty of other bug fixes and improvements. http://dlang.org/download.html http://dlang.org/changelog/2.089.0.html -Martin My code hit a regression on 2.089. https://issues.dlang.org/show_bug.cgi?id=20368
Re: Release D 2.089.0
On Sunday, 3 November 2019 at 13:35:36 UTC, Martin Nowak wrote:
Glad to announce D 2.089.0, ♥ to the 44 contributors.
This release comes with corrected extern(C) mangling in mixin
templates, atomicFetchAdd and atomicFetchSub in core.atomic,
support for link driver arguments, better support of LDC in
dub, and plenty of other bug fixes and improvements.
http://dlang.org/download.html
http://dlang.org/changelog/2.089.0.html
-Martin
My code hit a regression on 2.089.
This worked fine, before dmd 2.089 (reduced):
mixin Bug!"asd";
enum test;
template Bug(string n)
{
int main()
{
import std;
foreach(name; __traits(allMembers, __traits(parent,
main)))
static if (hasUDA!(__traits(getMember,
__traits(parent, main), name), test))
return 0;
return 0;
}
}
Re: Meta question - what about moving the D - Learn Forum to a seperate StackExchange platform?
On Friday, 18 October 2019 at 10:55:59 UTC, Martin Tschierschke wrote: Yes, it works as it is, but it is not the best solution to share know how. I agree. I think D.learn should be moved to stackoverflow and D.general should stay here.
Re: How does one cast to an array type?
On Thursday, 17 October 2019 at 12:19:03 UTC, Vinay Sajip wrote:
Are arrays and objects part of a unified type system?
Specifically, if I do
void foo(Object x) {
if (typeid(x) == typeid(Object[])) {
auto a = cast(Object[]) x;
}
}
I get a compilation error:
onlineapp.d(3): Error: cannot cast expression x of type
object.Object to Object[]
What's the way to achieve the cast, which should be safe given
the typeid check?
Thanks and regards,
Vinay Sajip
Did you try templates? It seems easier:
https://run.dlang.io/is/BbkTCw
Andrea
Re: rapidxml for D has been ported.
On Tuesday, 8 October 2019 at 08:56:26 UTC, zoujiaqing wrote: [...] So finally we have a working xml parser!
Re: How does D distnguish managed pointers from raw pointers?
On Thursday, 3 October 2019 at 14:13:55 UTC, IGotD- wrote: According to the GC documentation this code snippet char* p = new char[10]; char* q = p + 6; // ok q = p + 11; // error: undefined behavior q = p - 1; // error: undefined behavior suggests that char *p is really a "fat pointer" with size information. No it's not. char* is a plain pointer. The example is wrong, since you can't assign a new char[10] to char*. Probably they mean something like: auto arr = new char[10] char* p = arr.ptr; ... This code actually compiles, but its behaviour is undefined, so it is a logical error. In D arrays are fat pointer instead: int[10] my_array; my_array is actually a pair ptr+length.
Re: Using algorithms with ranges
On Thursday, 3 October 2019 at 05:33:04 UTC, mipri wrote:
void main() {
import std.range : iota;
foreach (x; iota(1, 10).withHistory)
writeln(x);
}
This doesn't work as expected, I think.
auto r = iota(1,10).withHistory;
writeln(r.front);
writeln(r.front);
Re: Avoid gratuitous closure allocations
On Friday, 20 September 2019 at 11:21:22 UTC, Ali Çehreli wrote: tl;dr Instead of returning an object that uses local state, return an object that uses member variables. Really good to know tips!
Re: How'd I store possible types for each item of a list of Variants ?
On Friday, 20 September 2019 at 08:58:09 UTC, oleobal wrote: I'm kind of out of ideas at this point. Would anyone have an elegant solution to this problem? Thanks ! Is this ok for you: https://run.dlang.io/is/VllpJk ? Andrea
