Re: Disable wrilten buf in docker

[zoujiaqing via Digitalmars-d-learn]

On Tuesday, 12 March 2024 at 15:44:08 UTC, Steven Schveighoffer 
wrote:

On Tuesday, 12 March 2024 at 06:36:09 UTC, zoujiaqing wrote:

Hi, my application use writeln in docker don't display.


Python add -u disable it.
https://stackoverflow.com/questions/29663459/why-doesnt-python-app-print-anything-when-run-in-a-detached-docker-container



Use setvbuf to switch to line buffering. Then you don’t have to 
manually flush everything


https://en.cppreference.com/w/c/io/setvbuf

-Steve


Thank you Steve!

how to use it in global?

Re: The std.file rename method fails in the docker environment.

[zoujiaqing via Digitalmars-d-learn]

On Wednesday, 13 March 2024 at 22:16:13 UTC, Sergey wrote:

On Wednesday, 13 March 2024 at 21:49:55 UTC, zoujiaqing wrote:

this is bug in D.


It seems like a bug in Hunt-framework.
And Hunt - is an abandoned project.


Hunt Framework call std.file rename function.
but this function can't move file from docker container to host 
machine.

Re: The std.file rename method fails in the docker environment.

[zoujiaqing via Digitalmars-d-learn]

On Wednesday, 13 March 2024 at 21:21:21 UTC, Jonathan M Davis 
wrote:
On Wednesday, March 13, 2024 3:03:30 PM MDT zoujiaqing via 
Digitalmars-d-learn wrote:
upload file to server in docker, but upload directory volume 
to host machine.


Exception error:
```
Invalid cross-device link
```

Have other function like move(a, b) ?

https://github.com/huntlabs/hunt-framework/blob/master/source/hunt/framework 
/file/File.d#L102


Well, the subject of your post mentions std.file, and then you 
link to a framework that does basically the same thing. So, I 
don't know what you're actually using.


However, both of those functions use the OS function, rename, 
which renames the file within a file system, but it can't move 
files across file systems. Strictly speaking, it's not possible 
to move a file across file systems. What a program like mv does 
when the destination is on a different file system from the 
source file is copy the file and then delete the original. So, 
if you want to "move" a file across file systems within your 
program, you'll have to do the same thing.


There may be a projcet on code.dlang.org which has a function 
which tries to move the file within the file system and then 
does a copy and remove instead if moving within the file system 
doesn't work, but otherwise, you'll have to implement that 
yourself, which could be as simple as catching the any 
exceptions from move and then attempting to copy the file and 
then remove it if an exception was thrown.


- Jonathan M Davis


this is bug in D.

Docker run app code:
```d
reanme("/tmp/aaa", "/data/attachments/aaa");
```

docker volume path:
```txt
VOLUME /data/attachments
```

docker compose yml:
```yml
volumes:
  - /data/attachments:/data/attachments
```

Error exception:
```
Invalid cross-device link
```

The std.file rename method fails in the docker environment.

[zoujiaqing via Digitalmars-d-learn]

upload file to server in docker, but upload directory volume to 
host machine.


Exception error:
```
Invalid cross-device link
```

Have other function like move(a, b) ?

https://github.com/huntlabs/hunt-framework/blob/master/source/hunt/framework/file/File.d#L102

Re: Disable wrilten buf in docker

[zoujiaqing via Digitalmars-d-learn]

On Tuesday, 12 March 2024 at 06:39:40 UTC, Richard (Rikki) Andrew 
Cattermole wrote:

On D's side you can use ``stdout.flush;`` to force it to flush.

I don't think there is a way to force flushing via CLI.


OK, thank you!

Problem solved!

Use code:

```D
std.stdio.stdout.flush();
```

Disable wrilten buf in docker

[zoujiaqing via Digitalmars-d-learn]

Hi, my application use writeln in docker don't display.


Python add -u disable it.
https://stackoverflow.com/questions/29663459/why-doesnt-python-app-print-anything-when-run-in-a-detached-docker-container

How to use eventcore write an echo server?

[zoujiaqing via Digitalmars-d-learn]

I use eventcore latest version write an echo server for test.

some error of build.

my D code:

```D

import eventcore.core;
import std.functional : toDelegate;
import std.socket : InternetAddress;
import std.exception : enforce;
import core.time : Duration;
import std.stdio : writeln;

void main()
{
auto addr = new InternetAddress("127.0.0.1", );
	auto listener = eventDriver.sockets.listenStream(addr, 
toDelegate());
	enforce(listener != StreamListenSocketFD.invalid, "Failed to 
listen for connections.");


writeln("Listening for requests on port ...");
while (eventDriver.core.waiterCount)
eventDriver.core.processEvents(Duration.max);
}

void onClientConnect(StreamListenSocketFD listener, 
StreamSocketFD client, scope RefAddress)

{
Connection connection = new Connection(client);

// Send welcome message to client
connection.write("Welcome to use my echo server.");
}

class Connection
{
StreamSocketFD client;

ubyte[1024] buf = void;

this(StreamSocketFD client)
{
this.client = client;

eventDriver.sockets.read(client, buf, IOMode.once, );
}

void write(ubyte[] data)
{
		eventDriver.sockets.write(client, data, IOMode.all, 
);

}

	void onWriteFinished(StreamSocketFD fd, IOStatus status, size_t 
len)

{
writeln("Send size: ", len);
}

void onRead(StreamSocketFD, IOStatus status, size_t bytes_read)
{
if (status != IOStatus.ok) {
writeln("Client disconnect");
eventDriver.sockets.shutdown(client, true, true);
eventDriver.sockets.releaseRef(client);
return;
}

this.write(buf[0..bytes_read]);

eventDriver.sockets.read(client, buf, IOMode.once, );
}
}
```

error code:
```log
dub build
Starting Performing "debug" build using ldc2 for aarch64, 
arm_hardfloat.
  Up-to-date taggedalgebraic 0.11.22: target for configuration 
[library] is up to date.
  Up-to-date eventcore 0.9.28: target for configuration 
[cfrunloop] is up to date.
Building eventcoredemo ~master: building configuration 
[application]
source/main.d(12,50): Error: none of the overloads of 
`listenStream` are callable using argument types 
`(InternetAddress, void delegate(StreamListenSocketFD a0, 
StreamSocketFD a1, scope RefAddress a2) @system)`

../../../.dub/packages/eventcore/0.9.28/eventcore/source/eventcore/driver.d(213,23):
Candidates are: `eventcore.driver.EventDriverSockets.listenStream(scope 
Address bind_address, StreamListenOptions options, void 
delegate(StreamListenSocketFD, StreamSocketFD, scope RefAddress remote_address) 
nothrow @safe on_accept)`
../../../.dub/packages/eventcore/0.9.28/eventcore/source/eventcore/driver.d(215,29):
`eventcore.driver.EventDriverSockets.listenStream(scope 
Address bind_address, void delegate(StreamListenSocketFD, StreamSocketFD, scope 
RefAddress remote_address) nothrow @safe on_accept)`
../../../.dub/packages/eventcore/0.9.28/eventcore/source/eventcore/drivers/posix/sockets.d(233,38):

`eventcore.drivers.posix.sockets.PosixEventDriverSockets!(CFRunLoopEventLoop).PosixEventDriverSockets.listenStream(scope
 Address address, StreamListenOptions options, void 
delegate(StreamListenSocketFD, StreamSocketFD, scope RefAddress remote_address) 
nothrow @safe on_accept)`
source/main.d(25,18): Error: function 
`main.Connection.write(ubyte[] data)` is not callable using 
argument types `(string)`
source/main.d(25,18):cannot pass argument `"Welcome to 
use my echo server."` of type `string` to parameter `ubyte[] data`
source/main.d(38,27): Error: function 
`eventcore.drivers.posix.sockets.PosixEventDriverSockets!(CFRunLoopEventLoop).PosixEventDriverSockets.read(StreamSocketFD socket, ubyte[] buffer, IOMode mode, void delegate(StreamSocketFD, IOStatus, ulong) nothrow @safe on_read_finish)` is not callable using argument types `(StreamSocketFD, ubyte[1024], IOMode, void delegate(StreamSocketFD, IOStatus status, ulong bytes_read))`
source/main.d(38,27):cannot pass argument `` 
of type `void delegate(StreamSocketFD, IOStatus status, ulong 
bytes_read)` to parameter `void delegate(StreamSocketFD, 
IOStatus, ulong) nothrow @safe on_read_finish`
source/main.d(43,28): Error: function 
`eventcore.drivers.posix.sockets.PosixEventDriverSockets!(CFRunLoopEventLoop).PosixEventDriverSockets.write(StreamSocketFD socket, const(ubyte)[] buffer, IOMode mode, void delegate(StreamSocketFD, IOStatus, ulong) nothrow @safe on_write_finish)` is not callable using argument types `(StreamSocketFD, ubyte[], IOMode, void delegate(StreamSocketFD fd, IOStatus status, ulong len))`
source/main.d(43,28):cannot pass argument 
`` of type `void delegate(StreamSocketFD fd, 

Re: Datetime format?

[zoujiaqing via Digitalmars-d-learn]

On Friday, 19 January 2024 at 00:22:48 UTC, H. S. Teoh wrote:
On Thu, Jan 18, 2024 at 11:58:32PM +, zoujiaqing via 
Digitalmars-d-learn wrote:
On Thursday, 18 January 2024 at 23:43:13 UTC, Jonathan M Davis 
wrote:
> On Thursday, January 18, 2024 4:26:42 PM MST zoujiaqing via 
> Digitalmars-d- learn wrote:

> > ```D
> > import std.datetime : Clock, format;
> > import std.stdio : writeln;
> > 
> > void main()

> > {
> >  auto currentTime = Clock.currTime;
> > 
> >  auto formattedTime = currentTime.format("%Y-%m-%d 
> > %H:%M:%S");
> > 
> >  writeln("Formatted Time: ", formattedTime);

> > }
> > ```

[...]

So shame! The standard library doesn't have date formatting.

[...]

It's easy to write your own:

d
import std;

void main() {
auto curTime = Clock.currTime;
auto dt = cast(DateTime) curTime;
auto fmtTime = format("%04d-%02d-%02d %02d:%02d:%02d",
dt.year, dt.month, dt.day, dt.hour, dt.minute,
dt.second);
writeln(fmtTime);
}


Output:
2024-01-18 16:21:51

You have maximum flexibility to format it however you like.


T


Thank you.

Re: Datetime format?

[zoujiaqing via Digitalmars-d-learn]

On Thursday, 18 January 2024 at 23:26:42 UTC, zoujiaqing wrote:

```D
import std.datetime : Clock, format;
import std.stdio : writeln;

void main()
{
auto currentTime = Clock.currTime;

auto formattedTime = currentTime.format("%Y-%m-%d 
%H:%M:%S");


writeln("Formatted Time: ", formattedTime);
}
```


C++ Std library exmaple code:
```CPP
// 2019-12-20 19:35:12
std::cout << std::put_time(locNow, "%Y-%m-%d %H:%M:%S") << 
std::endl;

```

Re: Datetime format?

[zoujiaqing via Digitalmars-d-learn]

On Thursday, 18 January 2024 at 23:43:13 UTC, Jonathan M Davis 
wrote:
On Thursday, January 18, 2024 4:26:42 PM MST zoujiaqing via 
Digitalmars-d- learn wrote:

```D
import std.datetime : Clock, format;
import std.stdio : writeln;

void main()
{
 auto currentTime = Clock.currTime;

 auto formattedTime = currentTime.format("%Y-%m-%d 
%H:%M:%S");


 writeln("Formatted Time: ", formattedTime);
}
```


std.datetime does not currently support custom date/time 
formats. It only supports the ISO format, the ISO Extended 
format, and Boost's simple time format.


// e.g. 20240118T163806.5813052
auto iso = time.toISOString();

// e.g. 2024-01-18T16:38:06.5813052
auto isoExt = time.toISOExtString();

// e.g. 2024-Jan-18 16:38:06.5813052
auto boostSimple = time.toSimpleString();

So, if you want a different format, you'll either need to make 
one yourself by calling the various properties on SysTime and 
passing them to something like std.format's format to create a 
string, or there are several packages on https://code.dlang.org 
which have functions for doing custom date/time formatting.


- Jonathan M Davis


Thank you for your replay.

So shame! The standard library doesn't have date formatting.

for this example "2024-Jan-18 16:38:06.5813052"
Why use Jan? no 01?
International standards should all apply numbers.
like this:
2024-01-18 16:38:06.5813052

Datetime format?

[zoujiaqing via Digitalmars-d-learn]

```D
import std.datetime : Clock, format;
import std.stdio : writeln;

void main()
{
auto currentTime = Clock.currTime;

auto formattedTime = currentTime.format("%Y-%m-%d %H:%M:%S");

writeln("Formatted Time: ", formattedTime);
}
```

Re: How to hash SHA256 from string?

[zoujiaqing via Digitalmars-d-learn]

Thank u every one ;)

Use botan so easy:
```D
import std.stdio;
import botan;

void main()
{
string appKey = 
"1";


auto sha256 = retrieveHash("SHA-256").clone();
sha256.update(appKey);

string sign = 
sha256.finished()[].toHexString!(LetterCase.lower);


writeln("sign: %s", sign);
}
```

How to hash SHA256 from string?

[zoujiaqing via Digitalmars-d-learn]

```D
import std.stdio;
import std.digest.sha;

void main()
{

SHA256 sha256;
sha256.start();
string appKey = 
"1";

ubyte[1024] data = cast(ubyte[])(appKey.dup[0..$]);
sha256.put(data);
ubyte[32] sign = sha256.finish();

string sign1 = cast(string) sign[0..$];
writeln("sign: %s", sign1);
}
```

The result varies when you run the code repeatedly and the 
display is garbled:

```
zoujiaqing@mac test % ./test
Getui access sign: %s>tM?a?j,???ߥm?8l~??uzU?|9?~ˡ
zoujiaqing@mac test % ./test
Getui access sign: %s1-??U?
?d<3^3??נ? ??P%u/Iv
zoujiaqing@mac test % ./test
Getui access sign: %s1?ϻN?ށ?`O?p!?O?4U
:8J~%ʬ
zoujiaqing@mac test % ./test
Getui access sign: %s??k#O?;?ڋ?5T?"=??;???e
```

Re: protobuf error: Tag value out of range

[zoujiaqing via Digitalmars-d-learn]

I was using a different version of dmd. Problem solved. thank you

protobuf error: Tag value out of range

[zoujiaqing via Digitalmars-d-learn]

code:
```d
auto req = new ApplyContact();
data.fromProtobuf!ApplyContact(req);
```

protobuf:

```d
class ApplyContact
{
@Proto(1) string fromId = protoDefaultValue!string;
@Proto(2) string toId = protoDefaultValue!string;
@Proto(3) string message = protoDefaultValue!string;
@Proto(4) string chatId = protoDefaultValue!string;
@Proto(5) ulong timestamp = protoDefaultValue!ulong;
@Proto(6) ContactApplySrc src = 
protoDefaultValue!ContactApplySrc;

@Proto(7) uint tagId = protoDefaultValue!uint;
}
```

log:
```log
2023-Oct-16 19:28:51.7708915 | 2772099 | warning | execute | 
google.protobuf.common.ProtobufException@/root/.dub/packages/protobuf-0.6.2/protobuf/src/google/protobuf/internal.d(199): Tag value out of range


/usr/include/dmd/phobos/std/exception.d:515 pure @safe void 
std.exception.bailOut!(google.protobuf.common.ProtobufException).bailOut(immutable(char)[], ulong, scope const(char)[]) [0x56522c393626]
/usr/include/dmd/phobos/std/exception.d:436 pure @safe bool 
std.exception.enforce!(google.protobuf.common.ProtobufException).enforce!(bool).enforce(bool, lazy const(char)[], immutable(char)[], ulong) [0x56522c3935a2]

/root/.dub/packages/protobuf-0.6.2/protobuf/src/google/protobuf/internal.d:199 pure @safe 
std.typecons.Tuple!(uint, "tag", google.protobuf.internal.WireType, 
"wireType").Tuple google.protobuf.internal.decodeTag!(ubyte[]).decodeTag(ref ubyte[]) 
[0x56522c5296ec]
/root/.dub/packages/protobuf-0.6.2/protobuf/src/google/protobuf/decoding.d:192 
pure privchat.protocol.contacts.ApplyContact 
google.protobuf.decoding.fromProtobuf!(privchat.protocol.contacts.ApplyContact, 
ubyte[]).fromProtobuf(ref ubyte[], privchat.protocol.contacts.ApplyContact) 
[0x56522c535c58]
source/executor/friend/ApplyFriendExecutor.d:23 void 
executor.friend.ApplyContactExecutor.ApplyContactExecutor.applyFriend(msgtrans.TransportContext.TransportContext, msgtrans.MessageBuffer.MessageBuffer) [0x56522c5cfdef]

/root/.dub/packages/hunt-reflection-0.2.1/hunt-reflection/source/witchcraft/mixins/methods.d:160
 const std.variant.VariantN!(32uL).VariantN 
msgtrans.executor.AbstractExecutor.AbstractExecutor!(executor.friend.ApplyContactExecutor.ApplyContactExecutor).AbstractExecutor.__mixin3.__mixin8.MethodMixin!(executor.friend.ApplyContactExecutor.ApplyContactExecutor,
 "applyFriend", 0uL).MethodMixin.invoke(std.variant.VariantN!(32uL).VariantN, 
std.variant.VariantN!(32uL).VariantN[]...) [0x56522c5a6d18]
/root/.dub/packages/hunt-reflection-0.2.1/hunt-reflection/source/witchcraft/invocable.d:90
 const std.variant.VariantN!(32uL).VariantN 
witchcraft.invocable.Invocable.invoke!(std.variant.VariantN!(32uL).VariantN, 
Object, msgtrans.TransportContext.TransportContext, 
msgtrans.MessageBuffer.MessageBuffer).invoke(Object, 
msgtrans.TransportContext.TransportContext, 
msgtrans.MessageBuffer.MessageBuffer) [0x56522d025a35]
/root/.dub/packages/msgtrans-0.1.4/msgtrans/source/msgtrans/executor/ExecutorInfo.d:73
 nothrow void 
msgtrans.executor.ExecutorInfo.ExecutorInfo.execute!().execute(ref 
msgtrans.TransportContext.TransportContext, 
msgtrans.MessageBuffer.MessageBuffer) [0x56522d02566f]
/root/.dub/packages/msgtrans-0.1.4/msgtrans/source/msgtrans/channel/tcp/TcpServerChannel.d:217
 void 
msgtrans.channel.tcp.TcpServerChannel.TcpServerChannel.dispatchMessage(hunt.net.Connection.Connection,
 msgtrans.MessageBuffer.MessageBuffer) [0x56522d0208b6]
/root/.dub/packages/msgtrans-0.1.4/msgtrans/source/msgtrans/channel/tcp/TcpServerChannel.d:150
 hunt.io.channel.Common.DataHandleStatus 
msgtrans.channel.tcp.TcpServerChannel.TcpServerChannel.initialize().__anonclass4.messageReceived(hunt.net.Connection.Connection,
 Object) [0x56522d020550]
/root/.dub/packages/msgtrans-0.1.4/msgtrans/source/msgtrans/channel/tcp/TcpDecoder.d:112
 hunt.io.channel.Common.DataHandleStatus 
msgtrans.channel.tcp.TcpDecoder.TcpDecoder.decode(hunt.io.ByteBuffer.ByteBuffer,
 hunt.net.Connection.Connection) [0x56522d035c61]
/root/.dub/packages/hunt-net-0.6.6/hunt-net/source/hunt/net/AbstractConnection.d:178
 hunt.io.channel.Common.DataHandleStatus 
hunt.net.AbstractConnection.AbstractConnection.handleReceivedData(hunt.io.ByteBuffer.ByteBuffer)
 [0x56522d2776c0]
/root/.dub/packages/hunt-net-0.6.6/hunt-net/source/hunt/net/AbstractConnection.d:159
 hunt.io.channel.Common.DataHandleStatus 
hunt.net.AbstractConnection.AbstractConnection.onDataReceived(hunt.io.ByteBuffer.ByteBuffer)
 [0x56522d2775eb]
/root/.dub/packages/hunt-1.7.13/hunt/source/hunt/io/channel/posix/AbstractStream.d:83
 void 
hunt.io.channel.posix.AbstractStream.AbstractStream.onDataReceived(hunt.io.ByteBuffer.ByteBuffer)
 [0x56522d3a362c]
/root/.dub/packages/hunt-1.7.13/hunt/source/hunt/io/channel/posix/AbstractStream.d:142
 bool hunt.io.channel.posix.AbstractStream.AbstractStream.tryRead() 
[0x56522d3a37ab]
/root/.dub/packages/hunt-1.7.13/hunt/source/hunt/io/TcpStream.d:428 void 
hunt.io.TcpStream.TcpStream.onRead() [0x56522d3a23a0]

Re: How to compiler dlang code on Apple M1?

[zoujiaqing via Digitalmars-d-learn]

On Saturday, 3 December 2022 at 20:33:59 UTC, Steven 
Schveighoffer wrote:


The issue is dub. Make sure you are using the dub built for ARM.

What Apple does is if any program in the same process group is 
x86 specific, then all the executed programs that are universal 
(including the linker) will switch to that mode.


The linker thinks you are building on x86, even though the 
compiler is doing ARM64. I ran into this early on too. 
Switching to the dub that ships with ldc built for ARM solved 
it!


-Steve



```[zoujiaqing@mac server % ~/Programs/ldc/bin/dub run 
--compiler=ldc2 --arch=arm64-apple-macos

Performing "debug" build using ldc2 for aarch64, arm_hardfloat.
taggedalgebraic 0.11.22: target for configuration "library" is up 
to date.
eventcore 0.9.20+commit.4.g6744ae7: target for configuration 
"cfrunloop" is up to date.

server ~master: building configuration "application"...
Linking...
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: alignment (1) of atom 'anon' is too small and may 
result in unaligned pointers
ld: warning: pointer not aligned at address 0x100334231 ('anon' + 
561 from 
.dub/build/application-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-FA51B7352B8B88D87B3B8911362A8A52/server.o)
ld: warning: pointer not aligned at address 0x1003350DB ('anon' + 
2025 from 
../../eventcore/.dub/build/cfrunloop-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-18F6DB0DFA53563841F49715E25DF4FC/libeventcore.a(eventcore.driver.o))
ld: warning: pointer not aligned at address 0x1003398EB ('anon' + 
1759 from 
../../eventcore/.dub/build/cfrunloop-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-18F6DB0DFA53563841F49715E25DF4FC/libeventcore.a(eventcore.drivers.posix.driver.o))
ld: warning: pointer not aligned at address 0x10033B426 ('anon' + 
696 from 
../../eventcore/.dub/build/cfrunloop-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-18F6DB0DFA53563841F49715E25DF4FC/libeventcore.a(eventcore.drivers.posix.events.o))
ld: warning: pointer not aligned at address 0x10033C2A1 ('anon' + 
618 from 
../../eventcore/.dub/build/cfrunloop-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-18F6DB0DFA53563841F49715E25DF4FC/libeventcore.a(eventcore.drivers.posix.kqueue.o))
ld: warning: pointer not aligned at address 0x10033C942 ('anon' + 
1186 from 
../../eventcore/.dub/build/cfrunloop-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-18F6DB0DFA53563841F49715E25DF4FC/libeventcore.a(eventcore.drivers.posix.pipes.o))
ld: warning: pointer not aligned at address 0x10033EE5E ('anon' + 
1258 from 
../../eventcore/.dub/build/cfrunloop-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-18F6DB0DFA53563841F49715E25DF4FC/libeventcore.a(eventcore.drivers.posix.processes.o))
ld: warning: pointer not aligned at address 0x100342E2A ('anon' + 
872 from 

How to compiler dlang code on Apple M1?

[zoujiaqing via Digitalmars-d-learn]

```
dub build --compiler=ldc2 --arch=arm64-apple-macos
Starting Performing "debug" build using ldc2 for aarch64, 
arm_hardfloat.
Building taggedalgebraic 0.11.22: building configuration 
[library]
Building eventcore 0.9.20+commit.4.g6744ae7: building 
configuration [cfrunloop]

Building server ~master: building configuration [application]
 Linking server
ld: warning: ignoring file 
../../../.dub/packages/taggedalgebraic-0.11.22/taggedalgebraic/.dub/build/library-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-60F6D8BEA34F8F5E792A98EA27B02D2235262A4E0795062F91FA90871411535D/libtaggedalgebraic.a, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file 
/opt/homebrew/Cellar/ldc/1.30.0_1/lib/libdruntime-ldc.a, building 
for macOS-x86_64 but attempting to link with file built for 
macOS-arm64
ld: warning: ignoring file 
.dub/build/application-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-7AC1A4B8AFD7D9F59DB01E667A3DCF19DD437F41E741F5937BDCF58FAE6AA922/server.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file 
../../eventcore/.dub/build/cfrunloop-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-ED6AFABD5E24BB6BCED6FD74F2DE88CF39B648360CE187983206459095D4677D/libeventcore.a, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file 
/opt/homebrew/Cellar/ldc/1.30.0_1/lib/libphobos2-ldc.a, building 
for macOS-x86_64 but attempting to link with file built for 
macOS-arm64

Undefined symbols for architecture x86_64:
  "_main", referenced from:
 implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to 
see invocation)

Error: /usr/bin/cc failed with status: 1
Error ldc2 failed with exit code 1.
```

Re: Does D programming language have work steal queue?

[zoujiaqing via Digitalmars-d-learn]

On Sunday, 22 May 2022 at 22:37:43 UTC, Stefan Koch wrote:

On Sunday, 22 May 2022 at 21:07:19 UTC, zoujiaqing wrote:

Does D language have task steal queue?
The requirements are high-performance, lock-free, and 
thread-safe.


I have one called fluffy:
https://github.com/UplinkCoder/fluffy

I am not 100% sure about the performance I did try to make it 
reasonable but in the absence of anything else it might be 
jumping off point for you.


Thanks ;)

Re: Does D programming language have work steal queue?

[zoujiaqing via Digitalmars-d-learn]

On Sunday, 22 May 2022 at 23:34:19 UTC, mw wrote:

On Sunday, 22 May 2022 at 21:07:19 UTC, zoujiaqing wrote:

Does D language have task steal queue?
The requirements are high-performance, lock-free, and 
thread-safe.


I have a C's liblfds D wrapper:

https://github.com/mw66/liblfdsd

right now only bmm and bss queue are wrapped.

It's not in dub yet, but I have been using it for a while, feel 
free to give it a try, or even send PRs :-)


Thanks :)
I will try it.

Re: Does D programming language have work steal queue?

[zoujiaqing via Digitalmars-d-learn]

On Sunday, 22 May 2022 at 21:23:24 UTC, zoujiaqing wrote:

On Sunday, 22 May 2022 at 21:07:19 UTC, zoujiaqing wrote:

Does D language have task steal queue?
The requirements are high-performance, lock-free, and 
thread-safe.


I think the final usage scenario is similar to this C++ project:
https://github.com/ConorWilliams/Forkpool


This project implements many of the ideas in (available in 
reference/):


 * F. Schmaus et al., “Nowa: A Wait-Free Continuation-Stealing 
Concurrency Platform”. In: 2021 IEEE International Parallel and 
Distributed Processing Symposium (IPDPS). 2021.
 * C. -X. Lin, T. -W. Huang and M. D. F. Wong, "An Efficient 
Work-Stealing Scheduler for Task Dependency Graph," 2020 IEEE 
26th International Conference on Parallel and Distributed Systems 
(ICPADS), 2020, pp. 64-71, doi: 10.1109/ICPADS51040.2020.00018.

Re: Does D programming language have work steal queue?

[zoujiaqing via Digitalmars-d-learn]

On Sunday, 22 May 2022 at 21:07:19 UTC, zoujiaqing wrote:

Does D language have task steal queue?
The requirements are high-performance, lock-free, and 
thread-safe.


I think the final usage scenario is similar to this C++ project:
https://github.com/ConorWilliams/Forkpool

Does D programming language have work steal queue?

[zoujiaqing via Digitalmars-d-learn]

Does D language have task steal queue?
The requirements are high-performance, lock-free, and thread-safe.

Re: I need to use delete as the method name. But now it's still a keyword, right?

[zoujiaqing via Digitalmars-d-learn]

On Wednesday, 18 May 2022 at 15:33:09 UTC, Steven Schveighoffer 
wrote:

On 5/18/22 2:13 AM, bauss wrote:

On Wednesday, 18 May 2022 at 02:12:42 UTC, zoujiaqing wrote:

https://dlang.org/changelog/2.100.0.html#deprecation_delete

My code:

```D
import std.stdio;

class HttpClient
{
string get(string url)
{
    return "";
}

string delete(string url)
{
    return "";
}
}

void main()
{
auto http = new HttpClient;

string content = 
http.get("https://forum.dlang.org/group/general;);
string content = 
http.delete("https://forum.dlang.org/newpost/general?;);

}
```

error message
```bash
% dub build --compiler=dmd
Performing "debug" build using dmd for x86_64.
test ~master: building configuration "application"...
source/app.d(10,9): Error: no identifier for declarator 
`string`

source/app.d(10,9): Error: declaration expected, not `delete`
source/app.d(14,1): Error: unmatched closing brace
dmd failed with exit code 1.
```

I wonder when I can use it. Because this will cause a 
software naming problem.


Considering the deprecation period has ended then IMO it 
should be able to be used as an identifier.


I would consider this a bug.


No, it's intentional.

https://dlang.org/changelog/2.100.0.html#deprecation_delete

> Starting with this release, using the delete *keyword* will
result in a *compiler error*.

It's still a keyword according to that. I'm assuming a future 
release will remove the error, and then you can use it as a 
symbol.


-Steve


The body is now available, and hopefully the delete keyword will 
be deprecated soon.

Re: I need to use delete as the method name. But now it's still a keyword, right?

[zoujiaqing via Digitalmars-d-learn]

On Wednesday, 18 May 2022 at 06:13:45 UTC, bauss wrote:


Considering the deprecation period has ended then IMO it should 
be able to be used as an identifier.


I would consider this a bug.


I hope this is a bug ;)

I need to use delete as the method name. But now it's still a keyword, right?

[zoujiaqing via Digitalmars-d-learn]

https://dlang.org/changelog/2.100.0.html#deprecation_delete

My code:

```D
import std.stdio;

class HttpClient
{
string get(string url)
{
return "";
}

string delete(string url)
{
return "";
}
}

void main()
{
auto http = new HttpClient;

	string content = 
http.get("https://forum.dlang.org/group/general;);
	string content = 
http.delete("https://forum.dlang.org/newpost/general?;);

}
```

error message
```bash
% dub build --compiler=dmd
Performing "debug" build using dmd for x86_64.
test ~master: building configuration "application"...
source/app.d(10,9): Error: no identifier for declarator `string`
source/app.d(10,9): Error: declaration expected, not `delete`
source/app.d(14,1): Error: unmatched closing brace
dmd failed with exit code 1.
```

I wonder when I can use it. Because this will cause a software 
naming problem.

Re: Error: variable `impl` cannot be modified at compile time

[zoujiaqing via Digitalmars-d-learn]

On Friday, 13 May 2022 at 19:48:04 UTC, Steven Schveighoffer 
wrote:

On 5/13/22 3:46 PM, Steven Schveighoffer wrote:


What writeln? Your compile trace is missing the original call 
line, and I would say probably more.


Looking at your last commit, I figured it out:

https://github.com/kerisy/archttp/blob/545b3eb738261e92c88b4e4bb664b4fdfb206398/source/archttp/codec/HttpDecoder.d#L31

That's where you are attempting to build an HttpRequestParser 
at compile time.


Just use the `__ctfe` trick.

-Steve

Thank you my friend.

Error: variable `impl` cannot be modified at compile time

[zoujiaqing via Digitalmars-d-learn]

```bash
% git clone https://github.com/kerisy/archttp.git
% cd archttp/
% dub build --compiler=dmd
Performing "debug" build using dmd for x86_64.
archttp 0.0.1+commit.3.g70d44ef: building configuration 
"library"...

../../.dub/packages/nbuff-0.1.14/nbuff/source/nbuff/buffer.d(74,25): 
Deprecation: `catch` statement without an exception specification is deprecated
../../.dub/packages/nbuff-0.1.14/nbuff/source/nbuff/buffer.d(74,25):use 
`catch(Throwable)` for old behavior
SSE: false
/opt/dmd/osx/bin/../../src/phobos/std/stdio.d(5190,5): Error: 
variable `impl` cannot be modified at compile time
/opt/dmd/osx/bin/../../src/phobos/std/stdio.d(4130,12):
called from here: `makeGlobal()`
/opt/dmd/osx/bin/../../src/phobos/std/stdio.d(4220,18):
called from here: `trustedStdout()`

```

Why can't we use writeln in constructors?
Comment out writeln so that the code will compile properly!

Re: How to gets multi results using tuple in D?

[zoujiaqing via Digitalmars-d-learn]

On Thursday, 23 December 2021 at 08:56:36 UTC, WebFreak001 wrote:

On Thursday, 23 December 2021 at 08:33:17 UTC, zoujiaqing wrote:


C++ Code:
```cpp
std::tuple DoIt()
{
return {false, 0, 0, "Hello"};
}

auto [r1, r2, r3, r4] = DoIt();

if (r1 == false)

```


D Code:

```D
Tuple!(bool, int, int, string) DoIt()
{
return [false, 1, 1, "Hello"];
}

auto result = DoIt();

auto r1= result[0];
auto r2= result[1];
auto r3= result[2];
auto r3= result[3];

if (r1 == false)
```

D requires more lines of code.


I think this is the best thing you can do:

```d
bool r1;
int r2, r3;
string r4;
AliasSeq!(r1, r2, r3, r4) = DoIt();
```

https://forum.dlang.org/thread/kmugmwmduxeoyfffo...@forum.dlang.org


Thanks! It's not concise!

How to gets multi results using tuple in D?

[zoujiaqing via Digitalmars-d-learn]

C++ Code:
```cpp
std::tuple DoIt()
{
return {false, 0, 0, "Hello"};
}

auto [r1, r2, r3, r4] = DoIt();

if (r1 == false)

```


D Code:

```D
Tuple!(bool, int, int, string) DoIt()
{
return [false, 1, 1, "Hello"];
}

auto result = DoIt();

auto r1= result[0];
auto r2= result[1];
auto r3= result[2];
auto r3= result[3];

if (r1 == false)
```

D requires more lines of code.

How to define property type to Array!struct?

[zoujiaqing via Digitalmars-d-learn]

My code:

```D
module http.HttpRequest;

import std.container;
import std.array : Appender;

struct HttpRequest
{
struct Header()
{
Appender!string name;
Appender!string value;
}

string method;
string uri;
int versionMajor = 0;
int versionMinor = 0;
Array!Header headers;
ubyte[] content;
bool keepAlive = false;
}
```

Error code:
```D
source/http/HttpRequest.d(18,5): Error: struct 
`std.container.array.Array` does not match any template 
declaration

```

Re: Bind C++ class to DLang : undefined reference to `Canvas::Foo()'

[zoujiaqing via Digitalmars-d-learn]

On Monday, 13 July 2020 at 12:57:52 UTC, Adam D. Ruppe wrote:

On Monday, 13 July 2020 at 09:34:35 UTC, zoujiaqing wrote:

# dmd source/main.d Canvas.o -L-lstdc++ && ./main
[1]49078 segmentation fault  ./main


On my computer I got this warning out of the compiler:

libstdc++ std::__cxx11::basic_string is not yet supported; the 
struct contains an interior pointer which breaks D move 
semantics!



sounds like it might be a known limitation.


Thanks Adam, but D link to C++ very hard?

Re: Bind C++ class to DLang : undefined reference to `Canvas::Foo()'

[zoujiaqing via Digitalmars-d-learn]

I changed string to basic_string.

///  source/main.d
import std.stdio;
import core.stdcpp.string;

extern(C++)
{
class Canvas
{
@disable this();

static Canvas Create();

basic_string!ubyte Foo();

basic_string!ubyte Bar();
};
}

void main()
{
Canvas canvas = Canvas.Create();

writeln(canvas.Foo());

writeln(canvas.Bar());
}

Error ...

# dmd source/main.d Canvas.o -L-lstdc++ && ./main
[1]49078 segmentation fault  ./main

Bind C++ class to DLang : undefined reference to `Canvas::Foo()'

[zoujiaqing via Digitalmars-d-learn]

/// Canvas.hpp

#include ;

class Canvas
{
static Canvas* Create();

std::string Foo();

std::string Bar();
};



/// Canvas.cpp

#include "Canvas.hpp"

#include 

Canvas* Canvas::Create()
{
return new Canvas();
}

std::string Canvas::Foo()
{
return "Foo";
}

std::string Canvas::Bar()
{
return "Bar";
}



/// main.d

import std.stdio;

extern(C++)
{
class Canvas
{
@disable this();

static Canvas Create();

string Foo();

string Bar();
};
}

void main()
{
Canvas canvas = Canvas.Create();

writeln(canvas.Foo());

writeln(canvas.Bar());
}



# clang++ -I./include/ -fPIE -c src/Canvas.cpp
# dmd source/main.d Canvas.o -L-lstdc++ && ./main
/usr/bin/ld: main.o:(.data._D4main6Canvas6__vtblZ+0x0): undefined 
reference to `Canvas::Foo()'
/usr/bin/ld: main.o:(.data._D4main6Canvas6__vtblZ+0x8): undefined 
reference to `Canvas::Bar()'

collect2: error: ld returned 1 exit status
Error: linker exited with status 1

Re: Dub - vibe.d - hunt framework ... problems

[zoujiaqing via Digitalmars-d-learn]

On Saturday, 1 February 2020 at 10:35:52 UTC, seany wrote:

Hi
I want to start a small server, that will be accessible form 
outside. Not a huge deal right?

Not quite.

My machine: 4.15.0-66-generic #75-Ubuntu SMP Tue Oct 1 05:24:09 
UTC 2019 x86_64 x86_64 x86_64 GNU/Linux


DMD : DMD64 D Compiler v2.090.0
Copyright (C) 1999-2019 by The D Language Foundation, All 
Rights Reserved written by Walter Bright



Now, I try to install dub from the official repo.
Then I do

* dub init server -t vibe.d
* cd server
* dub

I hit this issue : https://github.com/dlang/dub/issues/1712

As suggested, i try to build dub from github, following: 
https://github.com/dlang/dub/releases


I call ./build.d - and everything stops, and machine crashes.

I then try to install DaNode: 
https://github.com/DannyArends/DaNode


It breaks with : module std.algorithm import 'mean' not found

Then I try to install the Hunt Framework. It breaks with : 
basic type

expected, not foreach


Please help. I really want this issue to be resolved-


## 1. For simple server you can using hunt-http library.

Sample code:
```
import hunt.http;

void main()
{
HttpServer server = HttpServer.builder()
.setListener(8080, "0.0.0.0")
.onPost("/", (RoutingContext context) {
context.end("Hello World!");
})
.onGet("/user/:name", (RoutingContext ctx) {
string name = ctx.getRouterParameter("name");

ctx.write("Hello " ~ name);
ctx.end();
})
.build();

server.start();
}
```

## 2. For full server, you can using hunt-skeleton 
(hunt-framework based):

```bash
git clone https://github.com/huntlabs/hunt-skeleton.git myproject/
cd myproject/
dub run -v
```

You can Add pages in `config/routes` , like this:
```
GET   /   index.index
GET   /user/{name}user.detail
```

Add Controller file `controller/UserController.d` :
```
module app.controller.UserController;

import hunt.framework;

class UserController : Controller
{
mixin MakeController;

@Action
string detail(string name)
{
return "Hello " ~ name;
}
}
```

Build and run it:
```
cd myproject/
dub run -v
```

You can see it in the borwser:
```
http://localhost:8080
```

Re: Dmd install to new Windows 10 system can't run app.d

[zoujiaqing via Digitalmars-d-learn]

On Thursday, 21 November 2019 at 08:42:39 UTC, Seb wrote:


Note this line:


Running .\myproject.exe
Program exited with code -1073741515


Your compiled program is crashing. Could you run the compiled 
binary manually and obtain a stack trace?


Install msvcr100.dll for x64 the question is solved, thanks!

https://download.microsoft.com/download/3/2/2/3224B87F-CFA0-4E70-BDA3-3DE650EFEBA5/vcredist_x64.exe

Re: Dmd install to new Windows 10 system can't run app.d

[zoujiaqing via Digitalmars-d-learn]

On Thursday, 21 November 2019 at 08:42:39 UTC, Seb wrote:



Note this line:


Running .\myproject.exe
Program exited with code -1073741515


Your compiled program is crashing. Could you run the compiled 
binary manually and obtain a stack trace?


x86 is OK, but x64 bad.

PS D:\projects\myproject> dub run --arch=x86
Performing "debug" build using 
D:\Develop\dmd2\windows\bin\dmd.exe for x86.

myproject ~master: building configuration "application"...
Linking...
Running .\myproject.exe
Edit source/app.d to start your project.

Re: Dmd install to new Windows 10 system can't run app.d

[zoujiaqing via Digitalmars-d-learn]

On Thursday, 21 November 2019 at 08:42:39 UTC, Seb wrote:

On Thursday, 21 November 2019 at 08:30:33 UTC, zoujiaqing wrote:

1. Download dmd.2.088.1.windows.7z
2. Unzip it to D:\Develop\dmd2
3. Add ENV D:\Develop\dmd2\windows\bin to System Path
4. Run `dub --version` and `dmd --version` in powershell is OK
5. dub ini myproject (no dependency)
6. Run `cd myproject` and `dub run` is error...

[...]



Note this line:


Running .\myproject.exe
Program exited with code -1073741515


Your compiled program is crashing. Could you run the compiled 
binary manually and obtain a stack trace?


I don't install debug tools.

but add mscoff flags is OK.

PS D:\projects\myproject> cat .\source\app.d
import std.stdio;

void main()
{
writeln("Edit source/app.d to start your project.");
}
PS D:\projects\myproject> dub run --arch=x86_mscoff
Performing "debug" build using 
D:\Develop\dmd2\windows\bin\dmd.exe for x86, x86_mscoff.
myproject ~master: target for configuration "application" is up 
to date.

To force a rebuild of up-to-date targets, run again with --force.
Running .\myproject.exe
Edit source/app.d to start your project.

Dmd install to new Windows 10 system can't run app.d

[zoujiaqing via Digitalmars-d-learn]

1. Download dmd.2.088.1.windows.7z
2. Unzip it to D:\Develop\dmd2
3. Add ENV D:\Develop\dmd2\windows\bin to System Path
4. Run `dub --version` and `dmd --version` in powershell is OK
5. dub ini myproject (no dependency)
6. Run `cd myproject` and `dub run` is error...

Error Logging infomation:

PS D:\projects\myproject> dub run -v
Using dub registry url 'https://code.dlang.org/'
Refreshing local packages (refresh existing: true)...
Looking for local package map at 
C:\ProgramData\dub\packages\local-packages.json
Looking for local package map at 
C:\Users\zouji\AppData\Local\dub\packages\local-packages.json
Note: Failed to determine version of package myproject at .. 
Assuming ~master.

Refreshing local packages (refresh existing: false)...
Looking for local package map at 
C:\ProgramData\dub\packages\local-packages.json
Looking for local package map at 
C:\Users\zouji\AppData\Local\dub\packages\local-packages.json

Refreshing local packages (refresh existing: false)...
Looking for local package map at 
C:\ProgramData\dub\packages\local-packages.json
Looking for local package map at 
C:\Users\zouji\AppData\Local\dub\packages\local-packages.json

Generating using build
Configuring dependent myproject, deps:
Performing "debug" build using 
D:\Develop\dmd2\windows\bin\dmd.exe for x86_64.
myproject ~master: target for configuration "application" is up 
to date.
Using existing build in 
D:\projects\myproject\.dub\build\application-debug-windows-x86_64-dmd_2088-7987457E14148EF60F863BFBCDFB8A1F\.
Copying target from 
D:\projects\myproject\.dub\build\application-debug-windows-x86_64-dmd_2088-7987457E14148EF60F863BFBCDFB8A1F\myproject.exe to D:\projects\myproject

To force a rebuild of up-to-date targets, run again with --force.
Running .\myproject.exe
Program exited with code -1073741515


I think this problem has a great impact on a new person using D 
language under Windows system.

Re: How to get child class Type and members from parent class?

[zoujiaqing via Digitalmars-d-learn]

On Wednesday, 20 November 2019 at 22:26:17 UTC, Adam D. Ruppe 
wrote:

On Wednesday, 20 November 2019 at 20:57:56 UTC, Matheus wrote:
This is a different way of designing things, do people use 
this often?


This is really only useful sometimes.

It is important to notice that if you do

class C : I {}

I c = new C();
c.something();


the template this there will show I, not C. All it means is 
this is being called on an object of that *static* type. So it 
isn't really a substitute for traditional virtual functions.


Sometimes appropriate to use, just often not.


Thanks every friends :)

How to get child class Type and members from parent class?

[zoujiaqing via Digitalmars-d-learn]

import std.stdio;


class A
{
this(T)(T t)
{

}

void write()
{
T _this = cast(T) this;
writeln(this.v);
}
}

class B : A
{
string v = "hello";
}

void main()
{
auto b = new B;

writeln(b.write()); // print hello
}

Re: PHP to D Conversion

[zoujiaqing via Digitalmars-d-learn]

On Friday, 18 October 2019 at 06:22:33 UTC, Vino wrote:

Hi All,

  Request your help in converting a PHP code to D equivalent 
code




You can get one connection object and close it :)

```D

import hunt.database;

class AvmTest {

private Database _db;

this() {
_db = new 
Database("mysql://testusr:x...@test.srv.com:3910/test");

}

string[string][] getHostname() {

string[string][] data;

auto conn = _db.getConnection();


foreach(row; conn.query("SELECT host_name FROM 
hosts_coll"))

{
string[string] host;
host["HostName"] = row["host_name"];

data ~= host;
}

conn.close();

return data;
}
}

```

Re: PHP to D Conversion

[zoujiaqing via Digitalmars-d-learn]

On Monday, 21 October 2019 at 15:36:25 UTC, Andre Pany wrote:

On Monday, 21 October 2019 at 15:29:33 UTC, zoujiaqing wrote:

On Friday, 18 October 2019 at 06:22:33 UTC, Vino wrote:

[...]



import hunt.database;

class avmtest {

private Database db;

this() {
		db = new 
Database("mysql://testusr:x...@test.srv.com:3910/test");

}

string[string][] getHostname() {

string[string] data;


foreach(row; db.query("SELECT host_name FROM hosts_coll"))
{
string[string] host;
host["HostName"] = row["host_name"];
data ~= host;
}

return data;
}
}


Is this database library compatible with the fiber programming 
model of vibe-d?


Kind regards
Andre


Yes.
There are no conflicts.

Re: PHP to D Conversion

[zoujiaqing via Digitalmars-d-learn]

On Friday, 18 October 2019 at 06:22:33 UTC, Vino wrote:

Hi All,

  Request your help in converting a PHP code to D equivalent 
code


PHP Code:
class avmtest {
private $con;

function __construct() {
global $config;
$this->con = new mysqli(test.srv.com:3910, 
testusr, #, test);
if($this->con->connect_errno) { die("Connection 
Failed.\n"); }

}

function getHostname() {
$qdata = $this->con->prepare("SELECT host_name 
FROM hosts_coll");

$qdata->execute();
$qdata->bind_result($host);
while($qdata->fetch()) {
$data[] = array("HostName" => $host);
}
$sdata->close();
return $data;
}
}

D Code:
module avm.test;

import mysql;
import std.array : array;
import std.conv;
import std.variant;

class avmtest
{
private conn;

auto avmconnect()
{
	auto connectionStr = 
"host=test.srv.com;port=3910;user=testusr;pwd=#;db=test";

Connection conn = new Connection(connectionStr);
scope(exit) conn.close();
}

auto getHostname()
{
	  ResultRange qdata = conn.query("SELECT host_name FROM 
`hosts_coll`");

  Row row = qdata.front;
  Variant h = row[0];
  qdata.close();
  return h.to!string;
}
}

Error: Error: no identifier for declarator conn

From,
Vino.B



import hunt.database;

class avmtest {

private Database db;

this() {
		db = new 
Database("mysql://testusr:x...@test.srv.com:3910/test");

}

string[string][] getHostname() {

string[string] data;


foreach(row; db.query("SELECT host_name FROM hosts_coll"))
{
string[string] host;
host["HostName"] = row["host_name"];
data ~= host;
}

return data;
}
}

Re: D on ARM laptops?

[zoujiaqing via Digitalmars-d-learn]

On Thursday, 4 July 2019 at 07:46:53 UTC, Paolo Invernizzi wrote:

On Thursday, 4 July 2019 at 01:01:03 UTC, Nicholas Wilson wrote:

On Wednesday, 3 July 2019 at 20:49:20 UTC, JN wrote:
Does anyone know if and how well D works on ARM laptops (such 
as Chromebooks and similar)?


For example this one https://www.pine64.org/pinebook/ . Can 
it compile D? Obviously DMD is out because it doesn't have 
ARM builds. Not sure about GDC. How about LDC?


Haven't tried on laptops, but I can't imagine it would be too 
different to RasPi which LDC worked fine on.


We are using LDC on Jetson boards and it's working fine ...


LDC on FreeBSD working fine?

Re: How to use template Object in interface?

[zoujiaqing via Digitalmars-d-learn]

On Tuesday, 25 June 2019 at 12:11:47 UTC, zoujiaqing wrote:
hunt-cache current version use template implemention adapter 
changes.


I want use Interface to define Adapter, this master code unable 
to comple.


How to do it? D programming language design flaws?

```bash
git clone https://github.com/huntlabs/hunt-cache
cd hunt-cache/example
dub run -v

...

source/app.d(29,19): Error: no property name for type 
Nullable!(User)


```


Error in this commit:
https://github.com/huntlabs/hunt-cache/commit/1f4ca85b47a7e62b41907152f8c8904e69a09975

Re: is there any micro-service library in D?

[zoujiaqing via Digitalmars-d-learn]

On Wednesday, 19 June 2019 at 08:29:15 UTC, dangbinghoo wrote:

hi there,

Does anyone know the micro-service oriented design library or 
framework in D?



thanks!

binghoo dang


You can try hunt-service:

hunt-service is distributed RPC framework for DLang based on gRPC 
and neton.


https://github.com/huntlabs/hunt-service

Re: How to use template Object in interface?

[zoujiaqing via Digitalmars-d-learn]

On Tuesday, 25 June 2019 at 12:11:47 UTC, zoujiaqing wrote:
hunt-cache current version use template implemention adapter 
changes.


I want use Interface to define Adapter, this master code unable 
to comple.


How to do it? D programming language design flaws?

```bash
git clone https://github.com/huntlabs/hunt-cache
cd hunt-cache/example
dub run -v

...

source/app.d(29,19): Error: no property name for type 
Nullable!(User)


```


Interface code:

https://github.com/huntlabs/hunt-cache/blob/master/source/hunt/cache/adapter/Adapter.d

```D
module hunt.cache.adapter.Adapter;

import hunt.cache.Nullable;

interface Adapter
{
Nullable!V get(V) (string key);

Nullable!V[string] get(V) (string[] keys);

void set(V) (string key, V value, uint expired);

void set(V) (V[string] maps, uint expired);

bool setIfAbsent(V) (string key, V value);

bool hasKey(string key);

bool remove(string key);

void remove(string[] keys);

void clear();
}
```

How to use template Object in interface?

[zoujiaqing via Digitalmars-d-learn]

hunt-cache current version use template implemention adapter 
changes.


I want use Interface to define Adapter, this master code unable 
to comple.


How to do it? D programming language design flaws?

```bash
git clone https://github.com/huntlabs/hunt-cache
cd hunt-cache/example
dub run -v

...

source/app.d(29,19): Error: no property name for type 
Nullable!(User)


```

Re: How to convert array of structs to JSON

[zoujiaqing via Digitalmars-d-learn]

On Tuesday, 25 June 2019 at 05:33:57 UTC, mark wrote:

I have the following array of structs:

struct Person {
string name;
int age;
};


Person people[];
Person p;

Person p1 = {
"Bob",
12
};

Person p2 = {
"Bob",
12
};

people ~= p1;
people ~= p2;

I've read through the std.json documentation, but I'm still 
confused as to how to create an array of objects, especially if 
the objects are structs.


I've included this:

JSONValue jj;
jj["nodes"].array = [];

But I get the error: JSONValue is not an object. Ideally, I'd 
like to have a json output that looks like this:


[

{
"name": "Bob",
"age": 12
},
{
"name": "Bob",
"age": 12
},
]

Any help would be greatly appreciated.


use hunt library:

https://github.com/huntlabs/hunt


Sample code:

import hunt.serialize;

void main()
{
auto json = toJson(pepole);
}

Re: Error: char 0x200b not allowed in identifier

[zoujiaqing via Digitalmars-d-learn]

On Monday, 3 June 2019 at 14:41:18 UTC, ag0aep6g wrote:

On 03.06.19 15:37, zoujiaqing wrote:

Error for code:
source/hunt/xml/Element.d(12,13): Error: char 0x200b not 
allowed in identifier


U+200B is: ZERO WIDTH SPACE. Somehow you got that invisible 
character into your code. You have to get rid of it.


To do it manually, navigate to the locations the compiler gives 
you and find the spot where the cursor seems to get stuck for 
one key press. That's where a zero width space is.


You can also open the file in a different non-Unicode encoding. 
The zero width spaces should stick out as non-ASCII symbols.


Or you could write a program that goes over the file and 
filters the zero width spaces out.


Or just re-write whole lines or the whole file by hand.


Thanks :)

Error: char 0x200b not allowed in identifier

[zoujiaqing via Digitalmars-d-learn]

Error for code:
source/hunt/xml/Element.d(12,13): Error: char 0x200b not allowed 
in identifier
source/hunt/xml/Element.d(12,23): Error: character 0x200b is not 
a valid token
source/hunt/xml/Element.d(17,15): Error: char 0x200b not allowed 
in identifier
source/hunt/xml/Element.d(17,26): Error: character 0x200b is not 
a valid token
source/hunt/xml/Element.d(22,13): Error: char 0x200b not allowed 
in identifier
source/hunt/xml/Element.d(22,29): Error: character 0x200b is not 
a valid token
source/hunt/xml/Element.d(48,13): Error: char 0x200b not allowed 
in identifier
source/hunt/xml/Element.d(48,21): Error: character 0x200b is not 
a valid token
source/hunt/xml/Element.d(55,13): Error: char 0x200b not allowed 
in identifier
source/hunt/xml/Element.d(55,23): Error: character 0x200b is not 
a valid token
source/hunt/xml/Element.d(62,13): Error: char 0x200b not allowed 
in identifier
source/hunt/xml/Element.d(62,20): Error: character 0x200b is not 
a valid token



The Code file Element.d

```D
module hunt.xml.Element;

import hunt.xml.ElementType;

class Element
{
this(string name)
{
this._name = name;
}

Element addElement​(string name)
{
return new Element(name);
}

Element[] getElements​()
{
return this._elements;
}

Element getParentELement​()
{
return this._parentElement;
}

Element removeAttribute(string key)
{
this._attributes.remove(key);

return this;
}

Element addAttribute(string key, string value)
{
this._attributes[key] = value;

return this;
}

Element setAttribute(string key, string value)
{
this._attributes[key] = value;

return this;
}

Element addCDATA​(string cdata)
{
this._cdata = cdata;

return this;
}

Element addComment​(string comment)
{
this._comments ~= comment;

return this;
}

Element addText​(string text)
{
this._text = text;

return this;
}

private
{
string _name;
Element[] _elements;
Element _parentElement;
string[string] _attributes;
string[] _comments;
string _text;
string _cdata;
}
}
```