Re: hunt-examples/website-basic
On Saturday, 29 April 2023 at 18:05:20 UTC, Vino B wrote: Hi All, Request your help, while trying to compile the hunt-examples/website-basic, I am facing with the below error(https://github.com/huntlabs/hunt-examples/tree/master/website-basic). Error ``` C:\Users\test\AppData\Local\dub\packages\hunt-validation-0.5.0\hunt-validation\source\hunt\validation\DeclDef.d-mixin-41(54,102): Error: undefined identifier `arg` C:\Users\test\AppData\Local\dub\packages\hunt-validation-0.5.0\hunt-validation\source\hunt\validation\DeclDef.d-mixin-41(51,106): Error: undefined identifier `arg` C:\Users\test\AppData\Local\dub\packages\hunt-validation-0.5.0\hunt-validation\source\hunt\validation\DeclDef.d-mixin-41(54,108): Error: undefined identifier `arg` C:\Users\test\AppData\Local\dub\packages\hunt-validation-0.5.0\hunt-validation\source\hunt\validation\DeclDef.d-mixin-41(51,108): Error: undefined identifier `arg` ``` From, Vino.B Maybe, it's a bug in the newer compiler. See https://issues.dlang.org/show_bug.cgi?id=24344. It's fixed in hunt-validation. See https://github.com/huntlabs/hunt-validation/commit/c82f872e1042c80fe20ec85097f9003cc0f310e1
Re: GC memory fragmentation
On Wednesday, 14 April 2021 at 12:47:22 UTC, Heromyth wrote: On Sunday, 11 April 2021 at 09:10:22 UTC, tchaloupka wrote: Hi, we're using vibe-d (on Linux) for a long running REST API server and have problem with constantly growing memory until system kills it with OOM killer. The Hunt Framework is also suffering from this. We are trying to make a simple example to illustrate it. The bug has been fixed now[1]. It's because that a moudle named ArrayList wrapped the Array in std.container.array. We use a dynamic array instead. We are not sure why this happens. [1] https://github.com/huntlabs/hunt-extra/commit/903f3b4b529097013254342fdcfac6ba5543b401
Re: GC memory fragmentation
On Sunday, 11 April 2021 at 09:10:22 UTC, tchaloupka wrote: Hi, we're using vibe-d (on Linux) for a long running REST API server and have problem with constantly growing memory until system kills it with OOM killer. The Hunt Framework is also suffering from this. We are trying to make a simple example to illustrate it.
Re: How to get the UDAs for a function parameter correctly?
On Monday, 11 May 2020 at 02:34:32 UTC, Adam D. Ruppe wrote:
On Monday, 11 May 2020 at 02:25:39 UTC, Heromyth wrote:
I want to get the UDAs for for a function parameter. Here the
test code and I got some errors:
I think my blog aside is one of the few if only write-ups on
how to do this:
http://dpldocs.info/this-week-in-d/Blog.Posted_2019_02_11.html#how-to-get-uda-on-a-function-param
the library will not help much, you need to slice the
parameters yourself. (It might work combine lib stuff with
slice though, e.g. getUDA!(Parameters!F[1 .. 2]) maybe, i have
never tried).
but this does work:
static if(is(typeof(method) P == __parameters))
foreach(idx, _; P) {{
// alias for convenience later
alias param = P[idx .. idx + 1]; // this slice
is the trick
// can get the identifier now
string ident = __traits(identifier, param);
// and the attributes
foreach(attr; __traits(getAttributes, param))
{}
}}
That's great! It should use
static if(is(typeof(method) P == __parameters))
to get all the parameters instead of using:
alias Params = Parameters!(member);
Here is the adjusted code:
=
import std.stdio;
import std.traits;
import std.meta;
struct Length {
int a;
int b;
}
class ClassA {
void test(@Length(1, 9) int len, @Length(2, 4) int size) {
writeln("It's OK");
}
void test(string name, @Length(3, 5) int len) {
writeln("Works now");
}
void test() {
}
}
string test(T)() {
string str;
alias currentMembers = __traits(getOverloads, T, "test");
static foreach(member; currentMembers) {{
static if(is(typeof(member) Params == __parameters)) {
static foreach(i, _; Params)
{{
alias ThisParameter = Params[i .. i + 1];
static foreach(uda; __traits(getAttributes,
ThisParameter)) {
str ~= uda.stringof ~ "\n";
}
}}
}
}}
return str;
}
void main() {
enum aa = test!(ClassA);
writeln(aa);
}
How to get the UDAs for a function parameter correctly?
I want to get the UDAs for for a function parameter. Here the
test code and I got some errors:
source/app.d(29,33): Error: first argument is not a symbol
source/app.d(39,15): Error: template instance app.test!(ClassA)
error instantiating
How can I fix this? Would this be a bug? Thanks.
=
import std.stdio;
import std.traits;
import std.meta;
struct Length {
int a;
int b;
}
class ClassA {
void test(@Length(1, 9) int len, @Length(2, 4) int size) {
writeln("It's OK");
}
void test(string name) {
writeln("Can't be compiled");
}
}
string test(T)() {
string str;
alias currentMembers = __traits(getOverloads, T, "test");
static foreach(member; currentMembers) {{
alias Params = Parameters!(member);
static foreach(i; 0 .. Params.length)
{{
alias ThisParameter = Params[i .. i + 1];
static foreach(uda; __traits(getAttributes,
ThisParameter)) {
str ~= uda.stringof ~ "\n";
}
}}
}}
return str;
}
void main() {
enum aa = test!(ClassA);
writeln(aa);
}
Re: Why can meson find hunt-net but not hunt-proton in dependency resolution?
On Wednesday, 1 April 2020 at 02:27:38 UTC, YD wrote: Thanks for the reply! BTW is hunt-amqp for AMQP 1.0 only? Because when I try it on an AMQP 0.9 server, it does not seem to connect. Thanks again! We are using RabbitMQ v3.8.2 for test. The hunt-amqp is based on AMQP 1.0, and is not tested with AMQP 0.9. So, wo suggest you to upgrade the MQ server.
Re: Why can meson find hunt-net but not hunt-proton in dependency resolution?
On Wednesday, 1 April 2020 at 01:21:22 UTC, YD wrote: On Tuesday, 31 March 2020 at 19:59:25 UTC, YD wrote: [...] So I found that the issue is that dub.json file in hunt-proton has an entry referring to the parent package with a relative file path in it. When that relative file path is removed, Meson can find hunt-proton. However, even after Meson found it, there are two bad behaviors: (1) Meson refused to automatically add the dependencies of hunt-proton, and I had to manually add them to meson.build. (2) Meson did not automatically add the appropriate d_module_versions setting that is required by hunt (the HAVE_EPOLL/HAVE_IOCP/... setting), and I had to manually add that too. Anyway, after manually tweaking the meson.build file like above, I got it to work (except that compiling/linking seems quite slow). Sorry for the inconveniences. We are still testing Hunt-AMQP. The problems about dub.json will be fixed soon.
Re: Some code that compiles but shouldn't
On Monday, 30 December 2019 at 18:18:49 UTC, uranuz wrote:
I have created library/ framework to handle JSON-RPC requests
using D methods. I use some *template magic* to translate
JSON-RPC parameters and return values from/ and to JSON. And I
have encountered funny bug that at first was hard to find. My
programme just segfaulted when call to this method occured:
void getCompiledTemplate(HTTPContext ctx)
{
import std.exception: enforce;
enforce(ctx, `ctx is null`);
enforce(ctx.request, `ctx.request is null`);
enforce(ctx.request.form, `ctx.request is null`);
enforce(ivyEngine !is null, `ivyEngine is null`);
string moduleName = ctx.request.form[`moduleName`];
auto mod = ivyEngine.getByModuleName(moduleName);
return ctx.response.write(mod.toStdJSON().toString());
}
So as you see I have added a lot of enforce to test if all
variables are not null. But nothing was null and the reason of
segfault were unclear.
Today I just went home. Opened a bottle of beer. And have
noticed that function is marked as returning `void`, but in
fact it doesn't. When I fixed this segfault have gone. But why
this even compiled?! Interesting...
We also have a piece of code, see here
https://github.com/huntlabs/hunt-examples/blob/master/website-basic/source/app/controller/IndexController.d#L133.
It's a wrong function declaration.
There is no error message when compiling it. However, the
showString() can't be called via the browser, because the router
mapping fails.
What happened for this is that the IndexController is not used
directly by others. It's used in `mixin MakeController;`, see
https://github.com/huntlabs/hunt-framework/blob/master/source/hunt/framework/application/Controller.d#L153.
So the conclusion is the mixin needs to do more works to check
the validation in mixined code.
Re: Deserializing JSON as an abstract type
On Tuesday, 19 November 2019 at 00:40:16 UTC, Chris wrote:
So I'm trying to make a D wrapper for Telegram's JSON API using
libtdjson. All results coming from the JSON API take the
following structure:
{
"@type": "className",
"foo": "bar",
"baz" {
"@type": "otherClass"
}
}
where every object, including nested ones, has a "@type" field
which will correspond to a D class. There will be over 770
possible types. So what I'm trying to figure out is how to
deserialize the JSON so that it automatically gets parsed into
the correct type.
I'm looking at asdf right now, but it doesn't seem like it has
anything like that built in. Any ideas?
Can you have a look at this :
https://github.com/huntlabs/hunt/blob/master/examples/UnitTest/source/test/JsonSerializerTest.d
The JsonSerializer can serialize and deserialize a complex class.
Re: Translating Java into D
On Friday, 15 November 2019 at 13:15:29 UTC, Andre Pany wrote: On Friday, 15 November 2019 at 03:29:16 UTC, Heromyth wrote: On Thursday, 14 November 2019 at 19:50:22 UTC, NonNull wrote: Greetings, Java seems to be almost a subset of D in various ways. No, it's not exactly right. Java is more powerful than D as for a language. Many things that Java can do can't be done by D. For example, reflection, full meta info for a type in runtime, type deduction for a template, template member override. See: https://stackoverflow.com/questions/4829631/unusual-generic-syntax-arrays-stringaslist https://www.baeldung.com/java-executor-service-tutorial Has there been any work done to automatically translate Java source into D? We ported some projects in Java by hand. With the compile time reflection capabilities of D you can build a runtime reflection system. Therefore I would say D has reflection. The other points I do not have enough knowledge what Java provides. Kind regards Andre Yes, you can do everything with D in theory. The fact is that there are many stuff waiting for you to implement them when you are porting a project from Java to D, like the different or missing APIs, language features etc. See what we got from the portings: Containers: https://github.com/huntlabs/hunt/tree/master/source/hunt/collection Threading: https://github.com/huntlabs/hunt/tree/master/source/hunt/concurrency
Re: Translating Java into D
On Thursday, 14 November 2019 at 19:50:22 UTC, NonNull wrote: Greetings, Java seems to be almost a subset of D in various ways. No, it's not exactly right. Java is more powerful than D as for a language. Many things that Java can do can't be done by D. For example, reflection, full meta info for a type in runtime, type deduction for a template, template member override. See: https://stackoverflow.com/questions/4829631/unusual-generic-syntax-arrays-stringaslist https://www.baeldung.com/java-executor-service-tutorial Has there been any work done to automatically translate Java source into D? We ported some projects in Java by hand.
Re: Mimicking Java's Type Erasure
On Monday, 4 November 2019 at 00:16:53 UTC, Superstar64 wrote:
Consider the following Java code.
--
import java.util.function.Function;
public class Main{
//basic Rank2 type
static interface Stringer{
String show(Function type, A that);
}
static class Say implements Stringer {
public String show(Function type, A that){
return type.apply(that);
}
}
static class Shout implements Stringer {
public String show(Function type, A that){
return type.apply(that) + "!!!";
}
}
}
--
This uses Java's generics' type erasure to create a basic rank
2 type.
What are some clean ways to implement something similar in D,
in a type safe manner if preferable?
String show(A)(Stringer stringer, Function type, A
that) {
Shout shout = cast(Shout)stringer;
if(shout !is null) {
shout.show(type, that); return;
}
Say say = cast(Say)stringer;
if(say !is null) {
say.show(type, that); return;
}
assert(false, "Unsupported");
}
Stringer stringer = new Shout();
stringer.show(type, that);
Re: How to replace the main thread with custom thread
On Sunday, 5 May 2019 at 05:49:07 UTC, Heromyth wrote: We have made some extensions to std.thread. See: https://github.com/huntlabs/hunt/blob/master/source/hunt/concurrency/thread/ThreadEx.d. All the threads except the main thread now can be created with ThreadEx. My question is how can I create the main thread with ThreadEx. Is it possible or necessary? Should I modify std.thread and rebuild the Phobos? Thanks. It's so sad. The std.thread should be core.thread.
How to replace the main thread with custom thread
We have made some extensions to std.thread. See: https://github.com/huntlabs/hunt/blob/master/source/hunt/concurrency/thread/ThreadEx.d. All the threads except the main thread now can be created with ThreadEx. My question is how can I create the main thread with ThreadEx. Is it possible or necessary? Should I modify std.thread and rebuild the Phobos? Thanks.
Re: Why does D language do not support BigDecimal type?
On Monday, 11 March 2019 at 15:23:34 UTC, BoQsc wrote: There is Money datatype that can be provided by using a third party package: https://code.dlang.org/packages/money But that's only for money, what about math? Why such fundamental as BigDecimal is still not included into the D language itself? There is BigInt. If it is unavoidable to use Floating point, how can I quickly and simply understand the rules of using float to make the least error, or should I just find a third party package for that as well? There is an article on that, but it is not that straight forward: https://dlang.org/articles/d-floating-point.html Basically any thing that I find on Google, that include explaining floating point are badly written and hard to understand for the outsider lacking ability to understand advanced concepts. We have being porting one from Java. See https://github.com/huntlabs/hunt/blob/master/source/hunt/math/BigDecimal.d. It's so sad that many methods are still commented out.
Re: Using Async task with timer
On Wednesday, 6 February 2019 at 05:03:26 UTC, Sudhi wrote: Hi All, I am trying to use an Async task which would run at every interval of time. I could not find any example for this. Can some one enlighten me on this. I did not find much documentation on timers also. Thanks, Sudhi Here is an example, https://github.com/huntlabs/hunt/blob/master/examples/UnitTest/source/test/ScheduledThreadPoolTest.d You can have a try.
Re: reimplementing an interface in a derived class
On Thursday, 3 January 2019 at 23:23:12 UTC, Neia Neutuladh wrote:
On Thu, 03 Jan 2019 22:30:48 +, kdevel wrote:
class A : D {
int foo() { return 1; }
}
class B : A, D {
[...]
What is the meaning of the ", D"? It does not seem to make a
difference if it is omitted.
B must provide its own implementation of D. It can't simply use
A's implementation.
As for class B, it has already included foo(), even if it doesn't
override this method. So, is it necessary to override it again?
It not always needed to override foo(). Sometimes, we just want
to keep it as the one in class A and override it as necessary.
Honestly hope that the compiler can do this.
Re: How to initialize a globle variable nicely and properly?
On Saturday, 15 December 2018 at 03:48:15 UTC, Neia Neutuladh
wrote:
On Sat, 15 Dec 2018 02:54:55 +, Heromyth wrote:
shared static this() {
writeln("running A in shared static this(),
sharedField=", sharedField);
Thread th = new Thread(() { });
th.start();
When you start a D thread, thread-local static constructors get
run. So don't start threads until your shared static
constructors finish.
If I encountered something like this, I would set up a queue of
actions to be run at the start of main() and fill them with
static constructors. Instead of this static constructor
creating a thread, it would enqueue a delegate that starts the
thread.
Yes, it's very dangerous to create a new thread in shared static
this(). For a big project, it sometimes hard to identify this
problem. Maybe, the compiler should do something for this, should
it?
How to initialize a globle variable nicely and properly?
We have a module including many globle variables which are needed
to be initialized firstly in "shared static this() {}", see here
https://github.com/huntlabs/hunt/blob/master/source/hunt/time/Init.d.
The problem is that these variables are not always initialized
firstly when are referenced by some others moudles in "static
this() {}". Here is a demo to illustrate it.
//
// module A
//
module test.A;
import std.stdio;
import core.thread;
import core.time;
class A {
__gshared int sharedField;
shared static this() {
writeln("running A in shared static this(),
sharedField=", sharedField);
Thread th = new Thread(() { });
th.start();
Thread.sleep(100.msecs);
sharedField = 2;
writeln("running A done in shared static this(),
sharedField=", sharedField);
}
static this() {
writeln("running A in static this(), sharedField=",
sharedField);
}
}
//
// module B
//
module test.B;
import test.A;
import std.stdio;
import core.thread;
shared static this() {
writeln("running in shared static this() from B");
}
class B {
shared static this() {
writeln("running B in shared static this(),
sharedField=", A.sharedField);
}
static this() {
// bug is here
writeln("running B in static this(), sharedField=",
A.sharedField);
}
}
//
// module main
//
import std.stdio;
import test.A;
import core.thread;
void main()
{
writeln("running in main.");
}
//
// output
//
Running ./demo
running A in shared static this(), sharedField=0
running A in static this(), sharedField=0
running B in static this(), sharedField=0 // bug is here
running A done in shared static this(), sharedField=2
running in shared static this() from B
running B in shared static this(), sharedField=2
running A in static this(), sharedField=2
running B in static this(), sharedField=2
running main.
You can see the sharedField is 0 in B's static this() at first.
If Thread is disabled to run in shared static this(), this
problem seems to be fixed.
Some related bugs:
1) https://issues.dlang.org/show_bug.cgi?id=6114
2) https://issues.dlang.org/show_bug.cgi?id=4923
Re: How do I use null in a struct?
On Saturday, 10 November 2018 at 19:42:47 UTC, Václav Kozák wrote: I'm making a Rest API with vibe.d and I have a struct User. Sometimes I need to return only a few of the fields. So for example: return User(1, null, "John", null, null, ...); If I do this, an error occurs: cannot implicitly convert expression null of type typeof(null) to ... Thanks. Another choice: https://github.com/huntlabs/hunt/blob/master/source/hunt/lang/Nullable.d This Nullable is a class and we are using it.
Help needed to extend the core.thread
I want make some extensions to Thread in core.thread and wan. So I copy the whole of core.thread to another module named myext.thread. Here are two errors occurred: 1)When building this module In function `_D4myext6thread6Thread9termLocksFNiZv': /home/dlang/UnitTest/source/myext/thread.d:1723: undefined reference to `_D4core4sync5mutex5Mutex6__dtorMFNiNeZv' 2)When running a simple demo with empty main(). Program exited with code -11 It seems it is bad idea to do so. Maybe it's better to extend core.thread.Thread by inheriting it. Am I right? Thanks!
Re: Help about Template and class inheritance
On Sunday, 14 October 2018 at 15:06:49 UTC, Basile B. wrote:
The basic problem you're faced to here is that D class /
interface member functions that are templatized are never
virtual. I'm not sure if i understand well the JAVA pattern you
try to reproduce but since D interfaces can be templatized you
can do something like this, using variadics:
That's a good try. I want to have a try with template mixin.
About Java's pattern, see also:
https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ExecutorService.html
The interface ExecutorService has many implements like
AbstractExecutorService, ForkJoinPool,
ScheduledThreadPoolExecutor, ThreadPoolExecutor etc.
The sample above is updated:
import std.stdio;
class Future(T)
{
T result;
this(T r) {
this.result = r;
}
}
interface IExecutorService {
// Future!(T) submit(T)(T result); // can't be implemented
}
abstract class ExecutorService : IExecutorService {
Future!(T) submit(T)(T result) {
return new Future!(T)(result);
}
}
class ThreadPoolExecutor : ExecutorService {
// alias submit = ExecutorService.submit;
// override Future!(T) submit(T)(T result) { // can't override it
// return new Future!(T)(result + 10);
// }
}
class ForkJoinPool : ExecutorService {
// alias submit = ExecutorService.submit;
// override Future!(T) submit(T)(T result) { // can't override it
// return new Future!(T)(result * 10);
// }
}
void testBase(ExecutorService service) {
writeln("testBase: ", typeid(service));
Future!(int) f = service.submit!int(12);
writeln(f.result);
}
void testInterface(IExecutorService service) {
writeln("testInterface: ", typeid(service));
writeln("testInterface: ", typeid(cast(Object)service));
// Future!(int) f = service.submit!int(12);
// writeln(f.result);
}
void main()
{
ThreadPoolExecutor threadPool = new ThreadPoolExecutor();
ForkJoinPool forkJoinPool = new ForkJoinPool();
testBase(threadPool);
writeln();
testBase(forkJoinPool);
writeln("\n");
testInterface(threadPool);
writeln();
testInterface(forkJoinPool);
}
Help about Template and class inheritance
Here is a sample code
```d
import std.stdio;
class Future(T)
{
T result;
this(T r) {
this.result = r;
}
}
interface IExecutorService {
// Future!(T) submit(T)(T result); // can't be implemented
}
abstract class ExecutorService : IExecutorService {
Future!(T) submit(T)(T result) {
return new Future!(T)(result);
}
}
class ThreadPoolExecutor : ExecutorService {
// alias submit = ExecutorService.submit;
// override Future!(T) submit(T)(T result) { // can't override it
// return new Future!(T)(result + 10);
// }
}
void main()
{
ThreadPoolExecutor service = new ThreadPoolExecutor();
ExecutorService serviceBase = service;
IExecutorService serviceInterface = service;
Future!(int) f = service.submit!int(12);
writeln(f.result);
f = serviceBase.submit!int(12);
writeln(f.result);
// f = serviceInterface.submit!int(12);
// writeln(f.result);
}
```
The **submit** can't be defined in D as done in Java. See also
(search for exchangeMessageVectorsAsync):
https://www.programcreek.com/java-api-examples/?code=aarmea/noise/noise-master/app/src/main/java/com/alternativeinfrastructures/noise/sync/StreamSync.java
So, is there a better way to do this in D?
Any suggestions are welcome.
Thanks.
Re: Is there an efficient byte buffer queue?
On Monday, 8 October 2018 at 09:39:55 UTC, John Burton wrote: My use case is sending data to a socket. We have ported some containers from JAVA. ByteBuffer is a basic container interface and widely used in JAVA. See also: https://github.com/huntlabs/hunt/blob/master/source/hunt/container/ByteBuffer.d https://github.com/huntlabs/hunt/tree/master/examples/ContainerDemo/source
Re: Is there websocket client implementation for D
On Tuesday, 24 March 2015 at 17:55:38 UTC, Ilya Korobitsyn wrote: Hello! Is there any websocket client implementation in D? I know there is WS server as a part of vibe.d, but it does not seem to include client. Maybe there are some library bindings that I've missed? We just implemented one in D. See https://github.com/huntlabs/hunt-http/tree/master/examples/WebSocketDemo
Re: How to list all the manifest constants in a class or struct
On Sunday, 17 June 2018 at 20:03:09 UTC, aliak wrote:
On Sunday, 17 June 2018 at 02:44:38 UTC, Heromyth wrote:
[...]
I think this bolts.isManifestAssignable [1] will get you
partially there. The place where it'll fail though is a static
immutable (since they are assignable to manifest constants) but
you can filter those by seeing if you can take the address,
something like:
foreach (m; __traits(allMembers, T)) {
if (isManifestAssignable!(T, m) &&
!is(typeof(mixin(""~m))) {
// it's a manifest constant ... (?)
}
}
There of course might be edge cases I can't think of/don't know
about though.
Cheers,
- Ali
http://bolts.dpldocs.info/bolts.traits.isManifestAssignable.html
Thant's it. Thanks for your great lib:
https://github.com/aliak00/bolts
Re: How to list all the manifest constants in a class or struct
On Sunday, 17 June 2018 at 04:32:29 UTC, Jonathan M Davis wrote:
On Sunday, June 17, 2018 02:44:38 Heromyth via
Digitalmars-d-learn wrote:
Here is a struct named S:
struct S
{
enum X = 10;
enum Y
{
i = 10
}
enum Z = "str";
struct S {}
class C {}
static int sx = 0;
__gshared int gx = 0;
shared void g();
}
I want list all then the manifest constants in it.
I searched the std.traits and this forums, but get nothing.
Maybe, my real question is how to get the storage class for a
member in a class or struct.
As the storage class isn't part of the type, type introspection
tends to ignore it. You'll basically have to get the full list
of members of the type and then filter out stuff that isn't a
manifest constant, which is not exactly pleasant and can get a
bit tricky but should be possible. You'll probably have to do
something like filter out all of the members where you can take
their address and filter out all of the ones that are types,
and and at that point, you'd be close, but I'd have to
experiment to figure out whether that was enough or not or
whether something crept through.
Andrei has been working on coming up with a better wrapper
around the current introspection stuff so that you'll actually
get data types which contain the information about a symbol
rather than having to figure out which combination of __traits
and traits from std.traits are required to get what you want.
So, I expect that stuff like this will get a lot easier once
that's ready, but in the interim, if you're trying to do
something less common, it can involve having to do a lot clever
filtering to get exactly the stuff you want and only the stuff
you want - and I don't think that getting the list of manifest
constants in a type is a very typical thing for folks to do, so
std.traits certainly doesn't have anything like
isManifestConstant.
- Jonathan M Davis
Thanks for your answers. It's so glad to see some works have been
taken for this.
The isManifestConstant is really necessary. For example, I want
to port an Enum type from Java to D. It seems better to use a
Struct instead of an Enum.
See here:
https://github.com/eclipse/jetty.project/blob/jetty-9.4.x/jetty-http/src/main/java/org/eclipse/jetty/http/HttpStatus.java
https://github.com/eclipse/jetty.project/blob/jetty-9.4.x/jetty-http/src/main/java/org/eclipse/jetty/http/HttpHeaderValue.java
Of course, I can define a enum for members with the basic types
in D.
Sometimes, I like to define them in a class or struct as manifest
constants or immutable ones. So, I need isManifestConstant.
How to list all the manifest constants in a class or struct
Here is a struct named S:
struct S
{
enum X = 10;
enum Y
{
i = 10
}
enum Z = "str";
struct S {}
class C {}
static int sx = 0;
__gshared int gx = 0;
shared void g();
}
I want list all then the manifest constants in it.
I searched the std.traits and this forums, but get nothing.
Maybe, my real question is how to get the storage class for a
member in a class or struct.
Thanks.
Re: debugging in vs code on Windows
On Saturday, 14 October 2017 at 19:01:52 UTC, piotrklos wrote: On Saturday, 14 October 2017 at 13:12:51 UTC, Jerry wrote: On Friday, 13 October 2017 at 12:55:09 UTC, piotrklos wrote: (...) If you use generate a 32-bit binary using DMD, it generates it in a format that the C/C++ extension doesn't understand. You need to compile -m32mscoff or -m64, and you need to make sure the /DEBUG is passed to the linker, as I don't think dmd passes it that. You can do that by passing "-L/DEBUG" to DMD (when using -m32mscoff or -m64). There should be a .pdb file that gets generated, when you start the debugger it should say that symbols were loaded for the exe. I also can't say for certain if debug information is even generated for the unittests, so that might be something worth looking into to make sure it does. I have added this to dub.json: "dmd-flags":[ "-g", "-m64", "-L/DEBUG" ] but I don't see a pdb file generated when I build. What am I doing wrong? It's not necessary to set "dmd-flags". You need to run dub with "--arch=x86_64 --build=debug". Then, the .pdb file is under the folder .dub. To start a debug session, you would add a config file called launch.json, set the "program" and press F5. By the way, don't foret to add a breakpoint.
