Re: Is std.variant.visit not @nogc?
On Monday, 9 April 2018 at 03:41:17 UTC, Adam D. Ruppe wrote: On Monday, 9 April 2018 at 03:20:58 UTC, helxi wrote: visit, being a template, is @nogc or not based on the arguments passed to it as well as its own body, so while the error messages point to visit itself, these are frequently actually caused the predicate your pass. [] std.variant.VariantException.this is not marked @nogc (but it prolly could be) VariantN.peek is not @nogc because it calls Object.opEquals... which is broken af, sadly, but can probably be fixed for this case by marking TypeInfo.opEquals nogc. IMO, this is one more reason why sum-types should be built into the language compiler, instead of being implemented in user-space.
Re: Web servers in D
On Tuesday, 12 September 2017 at 12:34:26 UTC, aberba wrote: On Friday, 25 August 2017 at 05:25:09 UTC, Hasen Judy wrote: What libraries are people using to run webservers other than vibe.d? Don't get me wrong I like the async-io aspect of vibe.d but I don't like the weird template language and the fact that it caters to mongo crowd. I think for D to a have good web story it needs to appeal to serious backend developers, not hipsters who go after fads (mongodb is a fad, jade/haml is a fad). I probably need to combine several libraries, but the features I'm looking for are: - Spawn an HTTP server listening on a port, and routing requests to functions/delegates, without hiding the details of the http request/response objects (headers, cookies, etc). - Support for websockets - Runs delegates in fibers/coroutines - Basic database connectivity (No "orm" needed; just raw sql). - When iterating the result set of a sql query, has the ability to automatically map each row against a struct, and throw if the structure does not match. - More generally, map any arbitrary object (such as json) to a struct. Something like Zewo/Reflection package for swift[0]. [0]: https://github.com/Zewo/Reflection I feel like Vibe.d satisfies my first 3 requirements, but for the rest I will probably have to look for something else. In 2017, backend developers are more likely to write microservices which expose rest/graphQL APIs and put them in dockers containers Unless you're a full stack developer, you'll not be using jade/diet (at least not enough to be tempted to use something else). Its still sucks there's no object storage api for D. Are you guys still building monolithic web servers? Sorry this is an incredibly late response. Come on now, in CURRENT_YEAR people are jumping and this year's fad train. I don't want to jump along, thank you very much. And I don't understand this containers business. As far as I can tell it was designed for interpreted languages because they tend to have a lot of very specific dependences that are a hell to manage. If the compiler can produce a statically linked binary, then there's no problem that a container would solve here.
Ranges seem awkward to work with
Is this is a common beginner issue? I remember using an earlier
version of D some long time ago and I don't remember seeing this
concept.
Now, a lot of library functions seem to expect ranges as inputs
and return ranges as output.
Even parsing a csv line returns a range. And the funny thing is,
once you loop over it, it's done. You've basically consumed it.
For example, I was having some trouble with the api of the
std.csv module, so to help me debug, I printed the result of the
csv. ok, the result seems good. Now I try to use it, for example:
auto name = row[1];
And to my surprise there's a runtime error, something about range
something something. I don't even remember what the error was.
The thing is, it wasn't clear what was going on.
The line was actually more like:
auto some_var =
some_function(row[1].some_other_library_method!template_variable);
So because I was calling several library methods on the same
line, I thought the problem might have something to do with the
range not exactly matching what the library was expecting. I
thought maybe row[1] also returned some range instead of a string
and that range had something wrong with it.
Well, it turned out that my earlier attempt to print the parsed
csv row resulted in the row being "consumed" and now the row is
an empty range(!).
Is there a straight forward way to convert a Range to a list
other than manually doing a foreach?
string[] items;
foreach(item; someRangeThing) {
items ~= item;
}
I feel like that is a bit of an overkill.
Re: Web servers in D
On Saturday, 2 September 2017 at 09:26:27 UTC, Andrew Chapman wrote: [...] Don't use these components :-) [...] Vibe.d does this - just don't use the automatic API generation feature if you don't like it. Note, you can get access to the request/response objects even if you do use the API generation by using an @before method. E.g. in an interface you may have something like this: [...] Thanks for your response. I didn't see the new replies because I wrote the original message before I signed up on the site forum (I'm using the site, not an email program).
Re: Building (and including libraries) without dub
On Saturday, 26 August 2017 at 10:02:03 UTC, drug wrote: It's like C++. If you use Linux then: ``` dmd -L/path/to/lib -llibrarynamewithoutlibprefix ``` or example ``` dmd myapp.d -L../otherproject/lib -lcool ``` line above compiles `myapp.d` file and links it with library `libcool` that is place in directory `../otherproject/lib` Thanks for your response! So if I may make a guess, when you include a dependency in a dub project, what it ends up doing is compiling the dependency separately into a lib file then statically link the lib with your project?
Building (and including libraries) without dub
Building simple programs without dub is easy, just pass a list of .d source files to `dmd` or `ldc2`. What if I want to include a 3rd party library? Surely before dub existed, people were incorporating other libraries in their projects. I want to learn how this works from first principles. I've been working with dynamic/interpreted languages for too long, I forgot what it's like to build native programs without a dependency manager. Any help would be appreciated!
Re: Web servers in D
On Friday, 25 August 2017 at 06:15:35 UTC, Eugene Wissner wrote: There is collie [1]. Never used. Can't say a lot about it. arsd [2] has a lot of interesting web stuff: event loop, FastCGI/SimpleCGI; web-, DOM-, mail-utilities. And the last but not least I'm running currently a small web server serving static files based on tanya [3]. Once I'm ready to write a web-framework on top of it, it would be what you mention: no compile-time templates, no jade-style templates, since I dislike these too. But unfortunately it is not something can be used now. [1] https://github.com/huntlabs/collie [2] https://github.com/adamdruppe/arsd [3] https://github.com/caraus-ecms/tanya Thanks. Those are some interesting links. FWIW I kind of like compile-time templates. I just don't like jade (or coffee-script, or stylus, or all these languages that try to remove the punctuation and curly braces, and all signs of structure).
Web servers in D
What libraries are people using to run webservers other than vibe.d? Don't get me wrong I like the async-io aspect of vibe.d but I don't like the weird template language and the fact that it caters to mongo crowd. I think for D to a have good web story it needs to appeal to serious backend developers, not hipsters who go after fads (mongodb is a fad, jade/haml is a fad). I probably need to combine several libraries, but the features I'm looking for are: - Spawn an HTTP server listening on a port, and routing requests to functions/delegates, without hiding the details of the http request/response objects (headers, cookies, etc). - Support for websockets - Runs delegates in fibers/coroutines - Basic database connectivity (No "orm" needed; just raw sql). - When iterating the result set of a sql query, has the ability to automatically map each row against a struct, and throw if the structure does not match. - More generally, map any arbitrary object (such as json) to a struct. Something like Zewo/Reflection package for swift[0]. [0]: https://github.com/Zewo/Reflection I feel like Vibe.d satisfies my first 3 requirements, but for the rest I will probably have to look for something else.
