Seems to be working just fine as of 2.098.
```d
import std;
void main()
{
static foreach(Foo; ["Abc", "def"]) {{
string str = Foo;
writeln("Hello D ", str, __VERSION__);
}}
}
```
```
Hello D Abc2098
Hello D def2098
```
Anyway, AliasAssign has nothing to do with this.
On 15/12/2021 11:54 PM, Jan wrote:
On Wednesday, 15 December 2021 at 09:36:54 UTC, Jan wrote:
Unfortunately it's the "annoying little details" that I immediately
bumped into.
Just another example: I just learned that linking against C++ DLLs is
quite limited. I ran into the issue that
The string is not the problem.
```d
string ip_address = "192.168.1.1";
auto x = new InternetAddress(ip_address, 8008);
```
That works.
A string in D is an alias for immutable(char)[]. This is defined in
druntime (object.d).
Immutable does cast to const implicitly, so a string argument to
Don't use ~> for branches.
alpha@DESKTOP-RB97SA4 /tmp/dutils
$ dub build
Invalid SemVer format: stable.0.0
alpha@DESKTOP-RB97SA4 /tmp/dutils
$ nano dub.json
alpha@DESKTOP-RB97SA4 /tmp/dutils
$ dub build
Performing "debug" build using
C:\Tools\D\dmd_2.097.2\windows\bin\dmd.exe for
On 11/11/2021 2:13 PM, Ruby The Roobster wrote:
Branch ~master: Invalid SemVer format: testing.0.0
Branch ~testing: Invalid SemVer format: testing.0.0
Version 0.1.2: Invalid SemVer format: testing.0.0
testing is a branch.
You are using ~>testing for it.
To use a branch in the SEMVER is
On 09/11/2021 12:44 PM, Luis wrote:
It should work with the last version of DMD :
https://dlang.org/changelog/2.098.0.html#target
It won't.
https://github.com/dlang/dub/blob/master/source/dub/compilers/dmd.d#L111
On 08/11/2021 11:34 AM, Imperatorn wrote:
On Sunday, 7 November 2021 at 22:19:08 UTC, russhy wrote:
If i remember correctly, all you have to do is:
dub build --arch=x86_64-pc-windows-msvc --compiler=ldc2
Is this information on dub.pm? If not, we should add it.
This is compiler
You probably don't want to be using C variadics.
Instead try the typed one:
float mean(float[] input...) {
// you don't want to divide by zero
if (input.length == 0)
return 0;
float temp = 0;
// floats and double initialize to NaN by default, not
I think you are wanting this?
https://dlang.org/phobos/core_cpuid.html#.processor
The repo itself hasn't been archived as of this writing. So a PR may
succeed.
But yeah the guy is gone by the looks.
If he is willing this could be a possible candidate for moving it to
dlang-community although it'll need someone to shepherd it.
https://github.com/nomad-software/tkd
https://dlang.org/spec/expression.html#add_expressions
"7. If both operands are of integral types and an overflow or underflow
occurs in the computation, wrapping will happen. For example, uint.max +
1 == uint.min, uint.min - 1 == uint.max, int.max + 1 == int.min, and
int.min - 1 == int.max."
On 13/09/2021 3:21 PM, leikang wrote:
Are there any recommended books or videos to learn about the principles
of compilation? What else should I learn besides the principles of
compilation?
The classic book on compilers that Walter recommends is the dragon book.
No.
https://github.com/dlang-community/D-Scanner#implemented-checks
On 15/08/2021 8:11 PM, rempas wrote:
Still don't know what "pragma" does but thank you.
pragma is a set of commands to the compiler that may be compiler specific.
In the case of the msg command, it tells the compiler to output a
message to stdout during compilation.
On 13/08/2021 9:40 AM, russhy wrote:
also this but it's pretty old: https://github.com/rikkimax/Duml
It was a neat idea duml of mine, but I wouldn't recommend going down the
path of CTFE for this.
Best to write a tool using dmd-fe instead.
On 12/08/2021 9:36 PM, Learner wrote:
It seems that there is no easy way to transition from a postblit to a
copy constructor, no?
struct Foo {
this(ref Foo other) {
foreach(i, v; other.tupleof)
this.tupleof[i] = v;
}
@disable
So a field that will automatically be resolved to as part of the
behavior of generated toString methods.
That really isn't what alias this is used for commonly. I.e.
struct ValueReference {
private {
SomethingElse* impl;
}
bool isNull() { return impl is
On 02/08/2021 9:19 AM, Brian Tiffin wrote:
Question, or suggestion. In the Community forums, there is General and
Announce.
Announce is only for announcements.
General is used sometimes for OT stuff, like I've congratulated Andrei
on the birth of one of his kids (I asked prior). Or some
On 02/08/2021 5:18 AM, Alain De Vos wrote:
A simple and small wrapper around for instance the C-library libpq
should be part of the language itself and should not pull in more than
libpq itself.
Just so that we are all using the same terminology.
A binding defines the functions and types
It appears you are using the wrong lowercase character.
https://en.wikipedia.org/wiki/Dotted_and_dotless_I
From a quick experiment, it appears std.uni is treating the upper case
dotted I's lower case as a grapheme. Which it probably shouldn't be as
there is an actual character for that.
We
On 01/08/2021 6:30 AM, tastyminerals wrote:
So I thought there may be a way in D to communicate with the system
clipboard...
No, this requires a windowing library and yes a window to do it
(depending on the windowing system and even the desktop environment).
On 31/07/2021 7:33 AM, tastyminerals wrote:
I made a GUI app using tkd library. I am reading the string from one of
the app widgets and would like to put it into the clipboard. Does anyone
have an idea how to copy a string to the clipboard in D?
copyText on a Text widget appears to do what
On 22/07/2021 3:44 PM, Brian Tiffin wrote:
What is the preferred syntax for simple on/off states? Did I read that
D was moving to strictly 1 and 0 literals instead of true/false on/off
yes/no?
This is the first time I'm hearing about it, so almost certainly no.
On 18/07/2021 12:56 AM, Dennis wrote:
I don't know whether the spec or code is correct.
Unless otherwise specified, the code is authoritative.
On 17/07/2021 3:31 AM, Scotpip wrote:
In dub.sdl I see: ```dependency "msgpack-d" version="~>1.0.3"```
In dub.selections.json I see:
```
{
"fileVersion": 1,
"versions": {
"msgpack-d": "1.0.3"
}
}
```
Okay, its been added to your dub project. So far so good.
When I
Different doc generators, same source.
DDOC (phobos) and DDOX (library).
There is also adrdox[0] whose site does dub libraries also.
[0] https://dpldocs.info/
On 10/07/2021 2:51 AM, rempas wrote:
The file can be found quickly
[here](https://github.com/dlang/druntime/blob/master/src/core/sys/posix/unistd.d)
or in your system if you want. Now the question is, why isn't there an
"open" function for the equivalent system call? "close", "write", "read"
On 07/07/2021 11:54 PM, z wrote:
On Wednesday, 7 July 2021 at 10:27:47 UTC, notna wrote:
On Windows:
```
::> dmd curl_get.d
::> .\curl_get.exe
object.Error@(0): Access Violation
0x0283CA66
0x0041DE8D
0x004023A2
0x00402308
0x00414D33
0x00414CAD
0x00414B48
0x0040D41F
rdmd -main -unittest file.d
```d
import std.stdio;
unittest
{
writeln("first");
}
unittest
{
writeln("second");
assert(0);
}
```
Output:
```
first
second
onlineapp.d(11): [unittest] unittest failure
1/1 modules FAILED unittests
```
The first assert to execute should kill the
On 08/06/2021 2:47 PM, 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
On 15/05/2021 9:42 AM, DLearner wrote:
I am getting 'Error 42: Symbol Undefined' while testing some (fairly)
complex imports.
There was a reference in January to an Optlink bug that seemed like it
could be responsible.
If rdmd can use another linker (and one was recommended), I might be
On 10/05/2021 6:41 AM, Blatnik wrote:
Do thread local variables work in -betterC? Or maybe it's better to ask
are they _supposed_ to work in -betterC?
No.
It is tied to druntime. I.e. on Linux it calls __tls_get_addr to get the
address.
On 22/04/2021 7:51 AM, Alain De Vos wrote:
import bindc.opengl;
bindbc
dub run dfmt -- ./app.d
You passed "./app.d" to dub, not dfmt.
On 10/04/2021 11:44 PM, Alain De Vos wrote:
In order to run commands correctly I have to put soft links :
I.e.
dfmt -> /home/x/.dub/packages/dfmt-0.13.4/dfmt/bin/dfmt
or,
dscanner -> /home/x/.dub/packages/dscanner-0.11.0/dscanner/bin/dscanner
Then ./dfmt or ./dscanner run fine.
I use freebsd
On 04/04/2021 2:48 AM, DLearner wrote:
On Saturday, 3 April 2021 at 13:38:25 UTC, rikki cattermole wrote:
On 04/04/2021 2:34 AM, DLearner wrote:
However, changing extern(C) to extern(D) causes linker failures.
To me, that is bizarre.
extern(D) sets the ABI AND mangling.
D mangling
On 04/04/2021 2:34 AM, DLearner wrote:
However, changing extern(C) to extern(D) causes linker failures.
To me, that is bizarre.
extern(D) sets the ABI AND mangling.
D mangling incorporates things like the module name.
--- main.d
module main;
extern(C) __gshared int foo;
import std;
void main()
{
import foo : func;
func;
writeln(foo);
}
--- foo.d
module foo;
extern extern(C) __gshared int foo;
void func() {
foo++;
}
The __gshared is irrelevant to it working between modules, but it is
On 03/04/2021 11:17 PM, DLearner wrote:
On Saturday, 3 April 2021 at 10:05:45 UTC, rikki cattermole wrote:
On 03/04/2021 11:01 PM, DLearner wrote:
[...]
TLS variable with D mangling, not a c global.
[...]
That is a regular variable.
Setting the calling convention/mangling like that
On 03/04/2021 11:01 PM, DLearner wrote:
'Testmain' imports module 'testmod'.
Both are shown below.
I expected 1,1,2,2.
I got 1,0,2,1 - which speaks to scope/extern misunderstanding
Any ideas?
Best regards
Testmain:
int xvar;
TLS variable with D mangling, not a c global.
import testmod;
On 03/04/2021 10:58 PM, rikki cattermole wrote:
Nullable has an alias this which has been deprecated.
It is due for removal (the alias this).
You can remove it manually from your copy of phobos source.
Otherwise you'll just have to wait until it is removed upstream.
(deprecation are not
Nullable has an alias this which has been deprecated.
It is due for removal (the alias this).
You can remove it manually from your copy of phobos source.
Otherwise you'll just have to wait until it is removed upstream.
(deprecation are not errors, so you can ignore them).
"Whether the attributes are values or types is up to the user, and
whether later attributes accumulate or override earlier ones is also up
to how the user interprets them."
This doesn't explain it well, but you were adding types as attributes on
to those symbols. Not struct instances.
On 02/04/2021 6:10 PM, Computermatronic wrote:
On Friday, 2 April 2021 at 05:02:52 UTC, mw wrote:
Ahh, I got what I see (from writeln) is not what get string here ;-)
And I just tried:
string t = text("head-", strip(s), "-tail");
It's the same behavior.
So how can I trim the leading &
On 02/04/2021 5:51 PM, mw wrote:
Then how can I construct `t`? to make this assertion true:
assert(t == "head-abc-tail"); // failed!
Slice it.
string t = text("head-", s[0 .. 3], "-tail");
http://ddili.org/ders/d.en/slices.html
On 02/04/2021 5:38 PM, mw wrote:
On Friday, 2 April 2021 at 04:36:01 UTC, rikki cattermole wrote:
On 02/04/2021 5:32 PM, mw wrote:
---
import std;
import std.conv : text;
void main()
{
char[6] s;
s = "abc";
writeln(s, s.length); // abc6, ok it's the static array's length
On 02/04/2021 5:32 PM, mw wrote:
---
import std;
import std.conv : text;
void main()
{
char[6] s;
s = "abc";
writeln(s, s.length); // abc6, ok it's the static array's length
string t = text("head-", s, "-tail");
writeln(t, t.length); // head-abc-tail16, why?
assert(t[9]
On 27/03/2021 10:51 AM, dan wrote:
Are there any d compilers that run natively on the Mac Mini with an M1
chip?
If so, does anybody here have any experience with them that can be shared?
If not, and your machine is a mac mini, how would you go about
programming in d on it?
TIA for any
Try it with:
-allinst
It may just be deciding a template instance isn't required.
Pipe it to grep should work
| grep -v "__D2"
https://github.com/dlang/phobos/blob/master/std/socket.d#L190
Might be of some use to you
On 01/03/2021 8:02 PM, Keivan Shah wrote:
If possible, Can you also help me understand that why are the threads
not despawned once the GC is done collecting in this example?
There was a PR about this ages ago.
But one thing to consider is that keeping threads around not doing
anything
Do you still get them when you call your app like this?
./app --DRT-gcopt=parallel:0
On 28/02/2021 11:05 PM, Max Haughton wrote:
Do the windows APIs expect the length in memory rather than as a parameter?
This sounds like its being sent via a user field to be passed to a callback.
I.e. event loop for a window.
In this sort of case you only get one parameter on the callback
On 28/02/2021 8:05 PM, Jack wrote:
int[] arr = [1, 2, 3];
size_t l = cast(size_t)arr.ptr;
Okay, so far so good
int[] a = cast(int[]) cast(void*) l;
Umm, you haven't specified a length?
int[] a = (cast(int*)l)[0 .. 3];
If the callback is being called (in effect under the current stack
On 20/02/2021 8:13 PM, tsbockman wrote:
Well, that's just another reason not to use the GC for my current
project, then: I'm using 256-bit AVX vectors extensively.
You can still use the GC.
You just can't use it to allocate the classes you care about.
https://github.com/dlang-community/containers
It uses the older design for allocators (dependency).
On 07/02/2021 4:22 AM, frame wrote:
On Saturday, 6 February 2021 at 13:30:03 UTC, rikki cattermole wrote:
Okay, its still seeing something is alive then.
That's why I used the scope guard. I know it shouldn't have any effect
but I want to give the GC an extra hint ;)
The GC shouldn't be
On 07/02/2021 12:38 AM, Siemargl wrote:
On Saturday, 6 February 2021 at 11:20:18 UTC, Imperatorn wrote:
On Saturday, 6 February 2021 at 09:42:38 UTC, rikki cattermole wrote:
On 06/02/2021 3:32 PM, frame wrote:
[...]
This won't do anything.
[...]
Don't forget to stdout.flush; Otherwise
On 06/02/2021 3:32 PM, frame wrote:
On Friday, 5 February 2021 at 22:46:05 UTC, Bastiaan Veelo wrote:
?? Do you mean no collections happen? 32bit GC should just work.
No, it doesn't - this code fails on memory allocation and works fine
with -m64 switch:
import std.stdio;
import
The only difference between dmd, ldc and gdc (in effect) is the backend.
While druntime and Phobos will be patched for other platform targets,
over all its the same library.
The same goes for core.atomic. You should not need to know that it has
been patched. If you can call it and it gives
On 28/01/2021 1:16 PM, tsbockman wrote:
The documentation build on dlang.org is broken. Check the source code or
Adam D. Ruppe's dpldocs.info for the complete documentation:
http://dpldocs.info/experimental-docs/core.thread.osthread.html
Fixed: https://issues.dlang.org/show_bug.cgi?id=21309
https://d-apt.sourceforge.io/
Or you could use dub and not worry about where its installed.
https://github.com/gtkd-developers/GtkD/wiki/Hello-World-Example-on-Ubuntu-19.10-(Linux)
What you are describing sounds like regular reference counting.
All resources (i.e. windows) are pinned somewhere in memory. Its just
that you have to use special API's to destroy them rather than free.
On Wednesday, 13 January 2021 at 13:47:55 UTC, Roguish wrote:
On Wednesday, 13 January 2021 at 13:30:48 UTC, Roguish wrote:
Anything else I need to know when debugging on Linux, without
an IDE?
One specific question I have is: what's the difference between
-g and -debug and -d-debug?
From
On 12/01/2021 3:12 AM, zack wrote:
A beginner question: How to pass strings properly to functions in D?
Is there any allocation going on if just use a function as "myPrint"? In
C++ I have often seen calls where one just passes a reference/const
reference to a string to avoid allocation.
C++:
Your definition of Image is probably wrong.
You may have missed a pointer (8 bytes).
import std;
void main()
{
int[] a = [1, 2, 3, 4, 5];
int[3] b;
b[0 .. 3] = a[1 .. 4];
b.writeln;
}
Same principle, just remember to null terminate after slicing your
dynamic array and assigning it to your static array.
$ dub upgrade
https://dub.pm/commandline.html#upgrade
dub.selections.json hasn't been deleted/upgraded so the versions would
have gotten pinned to a known good state. Unless you change the version
invalidating it, it most likely won't upgrade by itself.
On 14/12/2020 9:56 AM, kdevel wrote:
On Sunday, 13 December 2020 at 20:25:06 UTC, KapyoniK wrote:
Is it really a bug ? \0 truncates the string, as mentionned on this
page :
https://en.wikipedia.org/wiki/Null-terminated_string
I thought the D runtime is written in D (with D strings)?!?
Did you initialize the D runtime before you called the D code? (assuming
C main).
On 12/12/2020 12:32 AM, rikki cattermole wrote:
Further, when the parameter name is not provided it will infer based
upon what is passed in. In effect it is templated.
What I meant was: the type is inferred if you only provide a single
identifier in a parameter.
string is not a built in type. It is an alias defined by druntime.
https://github.com/dlang/druntime/blob/master/src/object.d#L35
int on the other hand is defined by the compiler. It understands it.
Further, when the parameter name is not provided it will infer based
upon what is passed in.
On 05/12/2020 2:42 AM, Andrey wrote:
Hm, you mean that enum variable is not a real variable?
It is not a variable. It is a constant that cannot be changed and does
not exist in the executable.
I thought that to make CT variable you should mark it as enum (in c++ as
constexpr).
How to do
On 05/12/2020 1:54 AM, Andrey wrote:
Hello,
void test(const ref string[3] qazzz) { qazzz.writeln; }
void main()
{
enum string[3] value = ["qwer", "ggg", "v"];
That is a compile time constant (remove the enum).
test(value);
}
Gives errors:
onlineapp.d(26): Error: function
On 01/12/2020 7:39 PM, z wrote:
On Tuesday, 1 December 2020 at 04:50:03 UTC, rikki cattermole wrote:
...
What puzzles me is that the dependencies are indeed declared, but "dub
describe" refuses to recognize the dependencies and "dub build" fails.
"dub list" does recognize the root folder,
dub add-local, adds a directory as a known package that it can use as a
dependency (or to be executed).
You need to specify in the package that depends on the dependency what
dependencies you have.
I.e.
See the dependencies key:
{
"name": "myproject",
"description": "A
I was the person who wrote that example.
It was just an example to show how it can be used.
I would not write a function call like that when using a literal.
As Mike said, its all up to personal preference.
On 19/11/2020 1:11 PM, Dibyendu Majumdar wrote:
On Thursday, 19 November 2020 at 00:08:59 UTC, Adam D. Ruppe wrote:
On Thursday, 19 November 2020 at 00:07:12 UTC, Dibyendu Majumdar wrote:
int function() fp = test;
This tries to *call* the function test and assign its return value to fp.
On 09/11/2020 2:58 PM, Ali Çehreli wrote:
Does the D GC know the complete function call stack of the C program all
the way up from 'main'? Is there the concept of "bottom of the stack" or
does the D GC can only know the value of the stack pointer at the time
rt_init() was called. If the
On 29/10/2020 10:06 PM, Jan Hönig wrote:
On Thursday, 29 October 2020 at 09:01:12 UTC, Jan Hönig wrote:
This would mean, that this one should work as well.
It does not work as I intended, as `() => {}` has not the return type of
`void`.
(I don't know how to print: `ReturnType!(() => {})`)
(Params){ FunctionBody; }
Rule: ref|opt ParameterWithMemberAttributes FunctionLiteralBody
https://dlang.org/spec/expression.html#function_literals
void function()
Is a type https://dlang.org/spec/type.html#delegates
() => {}
Is actually:
() => Expression
Rule: ref|opt
On 25/10/2020 11:03 PM, Ali Çehreli wrote:
Does the GC see that local variable 'name' that is on the C side? What I
don't know is whether the GC is aware only of the stack frames of D
functions or the entire thread, which would include the C caller's 'name'.
The thread stack frame that is
https://dlang.org/phobos/std_format.html#formattedWrite
Uses GC for exception (so cannot be @nogc yet), but otherwise it should
be GC free.
On 16/10/2020 9:13 AM, Atmosfear wrote:
I'm a newby. Can you show me an example? In which module is it?
You can search for it on Github and it'll show up.
https://github.com/dlang/druntime/search?q=QueryPerformanceCounter
On 02/10/2020 9:33 PM, Imperatorn wrote:
Did you create a D-partition just for D. Pro
You can mount directories as a drive on Windows.
https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/subst
On 21/09/2020 6:24 AM, Vladimirs Nordholm wrote:
I am unsure what the dub file would look like. I read that there is
something called "subPackages", but in my mind I see them as
dependencies. Is "subPackages" the right approach here?
Yes but no.
Normally all of these (what appear to be small
On 28/08/2020 3:59 AM, Jesse Phillips wrote:
DMD installer still is unable to find "VS installed"
One of the reasons for this is that the environment variables have not
been updated.
You need to restart to do this.
On 07/08/2020 5:12 AM, wjoe wrote:
There's core.memory.GC.reserve which requests memory from the OS.
Basically pre-allocating memory for the GC heap.
Is the GC heap shared among all threads ?
That is up to the GC implementation.
And is it correct that even if I call GC.disable, the GC may
Old frontend:
Up to 2.060 : Failure with output: onlineapp.d(2): Error: valid
attribute identifiers are @property, @safe, @trusted, @system, @disable
not @nogc
2.061 to 2.065.0: Failure with output:
-
onlineapp.d(2): Error: user defined attributes cannot appear as postfixes
On 18/07/2020 9:14 PM, blizzard wrote:
Can anybody explain the difference between readln() and readln? I read
somewhere that the () were optional, so why this difference?
The brackets are optional when calling a function. You are not calling a
function if you wrap it in typeof.
"The
https://dlang.org/spec/pragma.html#mangle
pragma(mangle, "body")
extern(C) void body_func();
On 28/06/2020 4:59 PM, Kirill wrote:
module something;
extern(C)
int add(int a, int b);
Compile as static library some.c, add to command line of dmd.
Should be this simple more or less, depending on compilers and target
involved.
if (Child child = cast(Child)parent) {
assert(child !is null);
}
On 19/05/2020 12:51 AM, a beginner wrote:
@rikki cattermole
Dmd and ldc's codegen haven't stood still for 10 years. They both will be
emitting instructions your cpu cannot handle. Hence crashes.
So... was I wrong to assume it generates code for the cpu it's running
on (a P4 Northwood in my
It isn't just about the OS.
Dmd and ldc's codegen haven't stood still for 10 years. They both will
be emitting instructions your cpu cannot handle. Hence crashes.
On 29/04/2020 10:27 PM, Sam E. wrote:
To be honest, I haven't yet found the way to switch between -m32 and
-m64 (or other) via dub :)
$ dub build --arch=x86
$ dub build --arch=x86_64
On 10/04/2020 7:42 AM, Dennis wrote:
On Thursday, 9 April 2020 at 19:27:16 UTC, Quantium wrote:
I see this code imports drivers and does it depend on processor
architecture? Would it work only on 64-bit or 32-bit or some special
architechtures?
kernel32.dll and psapi.dll should be present on
How old is your build of dub?
"betterC" build option was introduced in 1.20.0
On 09/04/2020 4:25 AM, Net wrote:
On Tuesday, 7 April 2020 at 21:20:28 UTC, Quantium wrote:
Could you advise me how to do these steps on D? Which libs should I
import?
1. My programm gets a path to exe file
2. My programm starts that exe file and writes into it 2 commands
3. Programm gets
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