Is it possible to allow implicit casting from a base type to a
union type? For example, considering the following basic vector
union:
union vec2 {
struct {
float x = 0.0f;
float y = 0.0f;
}
float[2] v;
enum length = v.length;
Ahh, thanks. Looks like encapsulating the union in a struct with
alias this gets the job done, and removes the need for overloads.
Neat.
struct vec2 {
union {
struct {
float x = 0.0f;
float y = 0.0f;
}
On Tuesday, 3 May 2016 at 12:48:37 UTC, Benjamin Thaut wrote:
It seems that one of the fmod functions you declared is not
correct. Either the fmod api is not using the c calling
convention or you made a mistake when declaring the paramters
of the fmod functions. You should double check that
Hello, I've been encountering a strange problem that seems to
occur after calling some external C functions. I've been working
on a program that incorporates the FMOD C API for playing sound,
with a simple D binding based off the C headers, and actually
everything works more or less fine,
On Wednesday, 4 May 2016 at 09:40:55 UTC, Benjamin Thaut wrote:
On Tuesday, 3 May 2016 at 19:06:30 UTC, cc wrote:
it fails to link with "Error 42: Symbol Undefined
_FMOD_System_CreateSound@20". With extern(C) it compiles and
runs but the problem from above persists.
Is this on Windows
On Thursday, 5 May 2016 at 09:42:00 UTC, Benjamin Thaut wrote:
On Wednesday, 4 May 2016 at 17:53:32 UTC, cc wrote:
The OS is Win64 though the program is being compiled as 32-bit
and I'm using the 32-bit distributed DLL.
fmod.dll: PE32 executable (DLL) (GUI) Intel 80386, for MS
Windows
Ahh I see, thanks guys.
I'm having trouble getting the full name of an object of a class
that implements an interface, using typeid() or .classinfo, the
behavior seems to be different from that of a class that simply
derives other classes.
interface FooInterface {}
class BarImplementsInterface : FooInterface {}
Socket server = new TcpSocket();
server.setOption(SocketOptionLevel.SOCKET,
SocketOption.REUSEADDR, true);
server.bind(new InternetAddress(8000));
server.listen(8);
auto set = new SocketSet();
set.add(server);
auto sel = Socket.select(set,
On Sunday, 31 July 2016 at 08:29:10 UTC, ketmar wrote:
On Sunday, 31 July 2016 at 08:00:02 UTC, cc wrote:
socket sets usually updated after call to `select()`. you have
to recreate the sets before each call.
Ah that works, thanks.
Ok, I took another stab at this since I've had the problem
sitting for however many months and I think I finally got it
figured out. I needed to reimport the import library from the
DLL (via implib.exe) WITHOUT the /system switch, then, on
inspecting it, it appears the correct function names
All this with extern(Windows) rather than extern(C) by the way.
On Saturday, 15 April 2017 at 00:23:42 UTC, Lewis wrote:
Holy crap, thank you. I know this is late, but I was playing
around with derelictFMOD, and ran into a strange crash like
yours on shutdown. Looking at the disassembly revealed that
FMOD_System_Close() was popping more off the stack as it
When defining a toString(W)(ref W writer) function on a base
class and derived class, only the version on the base class is
called when formatting into a string. Is this intended behavior?
import std.format;
import std.range.primitives;
class Foo {
string test() {
On Sunday, 10 June 2018 at 02:57:34 UTC, evilrat wrote:
Only subsystems getters like SteamUser() or SteamInventory()
requires wrapping.
I really can't understand why they ever choose to silently
ignore registering callbacks received with C API systems
handles...
Thanks to the information
On Saturday, 9 June 2018 at 14:11:13 UTC, evilrat wrote:
However steam devs decided to shield actual pointer and return
pointer sized integer when C API is used(or they just screw
up?). Anyway, the pointers for subsystems returned by context
calls on C++ API and mirrored C API calls are
On Sunday, 10 June 2018 at 10:47:58 UTC, rikki cattermole wrote:
On 10/06/2018 10:29 PM, cc wrote:
And it successfully fires the 3-arg Run method of the callback
object. However for some reason the function table of the
ISteamClient seems to be off by one.. it kept calling the
wrong methods
On Friday, 8 June 2018 at 02:52:10 UTC, Mike Parker wrote:
On Friday, 8 June 2018 at 00:55:35 UTC, cc wrote:
class CImpl : CCallbackBase {
extern(C++) {
If anyone has any insight to provide it would be greatly
appreciated, thanks!
I've not used any of the C++ interfacing features
Is it possible to pass a class member function as a template
argument in such a way that it can 1. be called during runtime,
and 2. still retrieve the UDAs of the function itself? For
example, given this setup:
struct MYUDA {}
class Foo {
@(MYUDA) int bar(int x) { return x*2; }
}
Sample output:
Initializing.
User logged on: true
Starting request.
hid: 4838393704146785693
..
Request completed: NumberOfCurrentPlayers_t(1, 5828)
Terminating.
Not present: any indication that the registered callresult was
executed.
On Saturday, 9 June 2018 at 03:07:39 UTC, cc wrote:
I've put together a simplified test program here (124KB):
Here is a pastebin of the D source file updated with some
additional comments at the end with the callback class
definitions from the original header files
On Friday, 8 June 2018 at 07:32:54 UTC, evilrat wrote:
On Friday, 8 June 2018 at 06:59:51 UTC, cc wrote:
On Friday, 8 June 2018 at 02:52:10 UTC, Mike Parker wrote:
On Friday, 8 June 2018 at 00:55:35 UTC, cc wrote:
class CImpl : CCallbackBase {
extern(C++) {
If anyone has any
Hello, I'm attempting to interface with the Steam API DLL in D
and running into some trouble working with callbacks. I'm aware
there's already a project here http://derelict-steamworks.dub.pm/
but it seems to have not yet addressed the same issue. Steam
provides ways to poll for whether an
import std.container;
import std.format;
Array!char str;
str.length = 256;
str.sformat!"%s:%s"("some", "string");
// Error: template std.format.sformat cannot deduce function
from argument types !("%s:%s")(Array!char, string, string),
candidates are:
Still doesn't work without the cast it seems..
auto rng = str[];
rng.sformat!"%s:%s"("some", "string");
// Error: template std.format.sformat cannot deduce function
from argument types !("%s:%s")(RangeT!(Array!char), string,
string)
On Monday, 30 July 2018 at 07:34:04 UTC, Alex wrote:
I've started playing with "dub", and it *seems* to assume that
you want the files generated during the build process to
reside directly inside your checked-out source tree.
Is that true? And if so, am I fighting dub's design by
attempting
Before starting with D programming, most of my projects have
configured their build systems with Autotools or CMake, and git
for source control.
With those systems, it's usually considered best practice to
store all files generated during configuration and build to be
located outside of the
And what, if anything, can I do to avoid it?
string[] arr = ["abcd", "efgh", "ijkl"];
char[4096] buf;
char[] res;
writeln(GC.stats);
res = sformat(buf, "%s", arr);
assert(res.ptr == buf.ptr);
writeln(res);
writeln(GC.stats);
On Saturday, 31 August 2019 at 21:12:32 UTC, ag0aep6g wrote:
I've made a pull request to get rid of those allocations:
https://github.com/dlang/phobos/pull/7163
Thanks for the responses, very cool seeing these updates happen
so fluidly.
This might be more a question about the MS linker than D, but I'm
noticing that when building with -m64 under DMD v2.087.1, it is
no longer generating a console window when running the
application. Under 32-bit, it would always generate the console
window, and I had to disable it by building
On Sunday, 8 December 2019 at 17:49:09 UTC, Rainer Schuetze wrote:
Seems like a bug introduced in dmd 2.086, I've created a
bugzilla issue: https://issues.dlang.org/show_bug.cgi?id=20438
I suspect there is something broken with respect to the
free-lists inside the GC when manually freeing
Given the following program:
//version=FREE;
//version=COLLECT;
import std.stdio;
import std.datetime.stopwatch;
import core.memory;
immutable int[] intZ =
On Monday, 3 February 2020 at 13:26:38 UTC, mark wrote:
I'm using std.zip.ZipArchive to read zip files, e.g.:
auto zip = new ZipArchive(read(filename));
// ...
foreach (name, member; zip.directory) {
if (name.endsWith('/')) // skip dirs
continue;
On Wednesday, 12 February 2020 at 09:28:15 UTC, Simen Kjærås
wrote:
https://dlang.org/dmd-windows.html#switches
specifies that DMD may be passed a file on the command line
that contains compiler arguments and switches. This may be
freely combined with regular command line arguments if you so
Is there some way to globally declare version= or debug=
statements in a file and have them apply to the entire project
being compiled? As the documentation says these only apply to
the module scope they exist in, and need to be added to the
command line otherwise. It would be a bit easier
It looks like 004 (octal) is the flag for directories on
linux, but it does seem that std.zip is explicitly returning 0 if
the file was created on the opposite platform re: Posix vs
Windows, which is... odd.
@property @nogc nothrow uint fileAttributes() const
{
version (Posix)
{
This compiles:
class Foo {
int x;
@(1) void y() {}
this() {
static foreach (idx, field; getSymbolsByUDA!(Foo, 1)) {
}
}
}
This does not:
class Foo {
@(1) int x;
void y() {}
this() {
static
Given the sample program at https://pastebin.com/u9sSNtj7
I'm experiencing GC allocations with every call to
std.concurrency.send when sending larger messages (e.g. multiple
ulongs). These do not occur when sending uints in comparison, in
the provided example.
For example, when the
On Wednesday, 29 January 2020 at 21:10:53 UTC, Steven
Schveighoffer wrote:
I'm pretty sure std.concurrency uses Variant to pass message
data, which boxes when it gets over a certain size. You are
probably crossing that threshold.
The allocations should level out eventually when the GC starts
char[4096] buf;
writeln(GC.stats.usedSize);
foreach (i; 0 .. 10) {
sformat(buf, "%f", 1.234f);
writeln(GC.stats.usedSize);
}
Output with DMD32 D Compiler v2.089.1-dirty (Win10 x64):
16
16
16
...
Output with DMD32 D Compiler
On Friday, 31 January 2020 at 15:47:26 UTC, Steven Schveighoffer
wrote:
You could use RefCounted to build a struct that then is
sendable with the data you need. RefCounted allocates using C
malloc, not the GC.
Thanks for the tips. How exactly would I go about sending a
RefCounted value?
On Monday, 17 February 2020 at 17:01:12 UTC, Adam D. Ruppe wrote:
It sometimes helps to write it out log-form
foo.opDispatch!"hello"(5);
should give the full error.
this btw is one of the most annoying missing errors in d...
This worked, thank you!
On Monday, 17 February 2020 at 16:45:53
Is there any way to see the compilation errors that occurred
within an opDispatch template?
struct Foo {
void opDispatch(string s, SA...)(SA sargs) {
literally anything;
}
}
Foo foo;
foo.hello(5);
Result: Error: no property `hello` for type `Foo`
Desired
import std.meta;
enum A = AliasSeq!(1, 2, 3, 4);
THREELOOP: static foreach (idx, field; A) {
static if (field == 3) {
pragma(msg, "Got a 3!");
break THREELOOP;
}
static if (idx == A.length - 1) {
static assert(0, "Got no
Here's a more involved example of what I'm trying to accomplish.
Is there an easier/cleaner way to do this? (This is still a bit
reduced, what I'm actually trying to do is compare whether a
given variadic typetuple passed to opDispatch is implicitly
convertible to one of the parameter
On Wednesday, 8 July 2020 at 02:06:01 UTC, Steven Schveighoffer
wrote:
OK, so I have a situation where I'm foreaching over a
compile-time list of types. Inside the loop, I'm using a second
loop over a set of input.
Inside that loop, I'm using a switch on the input, and inside
the switch, I'm
Is it possible to import all symbols of a module, while renaming
just one of them? It seems like doing an import with renaming
automatically makes it selective.
In the example below, I'd prefer not to have to use the fully
qualified name for mymodule.MSG every time e.g.:
import
On Tuesday, 12 January 2021 at 20:19:20 UTC, ag0aep6g wrote:
On 12.01.21 21:09, cc wrote:
import core.sys.windows.windows;
import mymodule; // contains a struct named MSG
Error: `core.sys.windows.winuser.MSG` ... conflicts with
`mymodule.MSG`
vs
import core.sys.windows.windows : winMSG =
On Tuesday, 12 January 2021 at 21:32:14 UTC, Ali Çehreli wrote:
On 1/12/21 12:58 PM, cc wrote:
> void send(T query, void delegate(T.RESPONSE) callback) {
That wants a delegate that takes a T.RESPONSE (PingResponse in
this case). However, the following lambda is in fact a template:
>
Given the following program:
struct PingQuery {
string msg;
}
struct PingResponse {
string msg;
}
template send(T) {
void send(T query, void delegate(PingResponse) callback) {
writefln("Sending: %s", query);
if (callback) {
On Sunday, 13 June 2021 at 21:13:33 UTC, frame wrote:
On Sunday, 13 June 2021 at 10:02:45 UTC, cc wrote:
it seems to work as expected with the same C# code. Does D
explicitly disallow slices as an extern(C) export parameter
type?
The spec says that there is no equivalent to type[]. You get
D under dmd/Win10/64-bit currently seems to store strings
(slices) internally like so:
```d
static struct DString {
size_t length;
immutable(char)* ptr;
}
static assert(DString.sizeof == string.sizeof);
string s = "abcde";
DString d;
memcpy(, , s.sizeof);
assert(d.length ==
Does something to dequote (unquote? or what would you call it?) a
string exist in the standard library? I didn't see one in
std.string, just wondering before reinventing the wheel.
Something like:
```d
assert(dequote(`"foo"`) == "foo");
assert(dequote(`'foo'`) == "foo");
On Thursday, 13 May 2021 at 16:40:29 UTC, Imperatorn wrote:
Wouldn't this just this do that? 樂
```d
string dequote(string s)
{
return s[1..$-1];
}
```
The idea would be for situations where it isn't known in advance
whether the string is quoted, if it is quoted properly, and
whether
On Tuesday, 11 May 2021 at 09:10:02 UTC, Vinod K Chandran wrote:
Hi all,
I am practising D with a win api GUI hobby project.
I have a Window class and it resides in module window.d
My WndProc function resides in another module named
wnd_proc_module.d
Inside my WndProc, I get the Window class
Are these identical? Or is there a different usage for the (T :
something) form?
```d
auto opCast(T)() if (is(T == bool)) {
return _obj !is null;
}
```
```d
auto opCast(T : bool)() {
return _obj !is null;
}
```
On Saturday, 15 May 2021 at 18:24:19 UTC, Alain De Vos wrote:
Thanks, good idea but,
It does not initiate a GC cycle or free any GC memory.
Personally I wish D would re-implement "delete" and make it "just
work" like one would assume, but from what I've seen there have
been many many debates
On Friday, 21 May 2021 at 14:19:03 UTC, newbie wrote:
Thank you, and formatValue?
formattedWrite should handle this.
```d
@safe struct Foo {
int x = 3;
void toString(W)(ref W writer) if (isOutputRange!(W, char)) {
writer.formattedWrite("Foo(%s)", x);
}
On Friday, 14 May 2021 at 15:30:06 UTC, Imperatorn wrote:
https://www.amazon.com/Programming-Language-Former-Python-Developers-ebook/dp/B08MD7ZB2X
Anyone read it?
Haven't read it, the title has me at the first five words though.
On Tuesday, 1 June 2021 at 20:20:34 UTC, Ola Fosheim Grøstad
wrote:
Web components are becoming a reality, it essentially means
that you have code and styling wrapped up as a component, so
that you can use it by inserting a custom html-tag in your
code. Given the massive amount of web
On Thursday, 27 May 2021 at 20:46:22 UTC, Adam D. Ruppe wrote:
On Thursday, 27 May 2021 at 20:44:21 UTC, frame wrote:
Did you mean to add the delegate as GC root or the data?
The delegate.ptr property.
Is there any way to enforce at compile time that we're not
accidentally allocating when
This is overkill for any reasonable application, but I've always
wanted to design a whole UI framework in OpenGL, just for the
novelty of it. I always end up having to reinvent the wheel for
UI elements in my projects anyway.
https://streamable.com/2uvt4h
On Wednesday, 2 June 2021 at 17:50:13 UTC, Sean wrote:
On Wednesday, 2 June 2021 at 15:32:38 UTC, Sean wrote:
if so, how can I get the behavior i am searching for? Thank
you.
My current solution, if anyone wonders :
https://github.com/patefacio/d-help/blob/master/d-help/opmix/dup.d
You may
On Saturday, 22 May 2021 at 03:07:10 UTC, cc wrote:
Ahh, in that case it would appear formattedWrite isn't @safe at
all. Looks like you have to stick with put()?
```d
@safe void toString(W)(ref W writer) if (isOutputRange!(W,
char)) {
//writer.formattedWrite!("FOO:%s", x); // fails
On Friday, 21 May 2021 at 16:53:48 UTC, drug wrote:
21.05.2021 18:28, cc пишет:
On Friday, 21 May 2021 at 14:19:03 UTC, newbie wrote:
Thank you, and formatValue?
formattedWrite should handle this.
```d
@safe struct Foo {
int x = 3;
void toString(W)(ref W writer) if
On Saturday, 22 May 2021 at 03:14:35 UTC, cc wrote:
Oops, disregard this. I had an error in my imports.
It does in fact work in @safe.
I should add as an aside then that there is an issue of errors
from the body of a toString template not being displayed, and
instead the template being
On Monday, 26 April 2021 at 13:44:19 UTC, frame wrote:
On Sunday, 25 April 2021 at 15:01:25 UTC, cc wrote:
Adding a note in case anyone stumbles across this with a
similar problem:
Adding `stdout.setvbuf(0, _IONBF);` to both the main and DLL
will cause D to autoflush after every write call
On Sunday, 2 May 2021 at 02:42:46 UTC, Adam D. Ruppe wrote:
On Sunday, 2 May 2021 at 02:34:41 UTC, cc wrote:
which seems to fix it, but I'm not entirely sure what's going
on, if this is expected behavior, if that's the correct way to
handle it, and so on.
Oh I've been working on this the
Ordinarily, it seems legal to append to an array that has been
declared at module level (or as a static class member) that
hasn't been otherwise initialized, for example:
```d
class Foo {}
private Foo[] cache;
void main() {
auto foo = new Foo();
cache ~= foo;
}
```
However,
On Sunday, 2 May 2021 at 02:34:41 UTC, cc wrote:
[...]
Just to add, only appending to the array seems to give
OutOfMemoryErrors. I can idup strings, call stdc malloc, etc
just fine.
On Monday, 19 April 2021 at 18:32:15 UTC, Adam D. Ruppe wrote:
On Monday, 19 April 2021 at 18:05:46 UTC, cc wrote:
This seems to work if I flush after every printf or write in
both main and the dll. I was under the impression they were
supposed to share the same IO buffers though, is this not
Just encountered this compilation failure in DMD winx64 2.096,
which previously worked in 2.095 and prior versions. Just
wondering if it's a bug, or a new issue to keep in mind when
importing modules? Sorry for the complex nature of this scenario
but I'll try to keep it as simple as
On Monday, 19 April 2021 at 16:00:25 UTC, frame wrote:
You miss a core.stdc.stdio import in main().
I also omit the def-File, maybe you have an error in it? It
shouldn't be necessary to include. It just did:
```
dmd -m64 -ofmydll.dll -L/DLL mydll.d
```
Sorry, here's the def file, taken from
I'm not sure if this is something unique to D or not, but I've
having a minor issue where stdout output from a DLL (either via
printf or phobos std.stdio write) is not displayed until after
the main process has completed. I'm making a project based
around the example at
On Monday, 19 April 2021 at 16:04:28 UTC, Mike Parker wrote:
On Monday, 19 April 2021 at 14:55:03 UTC, cc wrote:
And upon running, the output I receive is:
```
[Main] Start
[Main] x: 5
[Main] Finished
[Main] END
[dll] DLL_PROCESS_ATTACH
[dll] static this for mydll
[dll] MyDLL_Test
[dll]
On Tuesday, 20 July 2021 at 09:24:07 UTC, Mark Lagodych wrote:
Is there a way to make myvar local to each instance of `X`
without making it a variable of `X`? Just curious.
Sorry if I missed something obvious but is there a specific
reason why it isn't just a class member variable?
```d
```d
struct A {}
class B {
A opCast(T : A)() {
return A();
}
}
void main() {
auto b = new B();
destroy(b);
}
```
fails with
```
dmd2\windows\bin\..\..\src\druntime\import\object.d(4209): Error:
template instance `opCast!(void*)` does not match
On Sunday, 20 March 2022 at 09:42:44 UTC, Caten wrote:
Hi, I also need a function to "unquote" string, like this:
```d
assert(unquote(`\n`)=="\n");
```
Is there a way to do that?
I rolled my own for that recently:
```d
string dequote(string str) @safe pure {
if (str.length < 2)
On Tuesday, 22 March 2022 at 07:18:00 UTC, cc wrote:
On Sunday, 20 March 2022 at 09:42:44 UTC, Caten wrote:
Hi, I also need a function to "unquote" string, like this:
```d
assert(unquote(`\n`)=="\n");
```
Is there a way to do that?
I rolled my own for that recently:
```d
string dequote(string
Sorry for the fairly lengthy post. I'm wondering if there are
any suggested good practices in place for calling templated
functions using the runtime type of an object, e.g. what
`typeid(object)` returns.
Consider the following situation:
```d
class Person {
string name;
int
On Monday, 11 September 2023 at 17:51:04 UTC, BoQsc wrote:
I would like to set function's default struct for a function in
a way that it would be visible for the reader to see what
options are set. Something like `Options option =
{silenceErrors: false}`
If the function's defaults will
On Friday, 25 August 2023 at 21:00:08 UTC, Guillaume Piolat wrote:
The idea is to deliberately mark @system functions that need
special scrutiny to use, regardless of their memory-safety.
Function that would typically be named `assumeXXX`.
...
That way, @safe code will still need to manually
On Sunday, 1 May 2016 at 09:42:37 UTC, ParticlePeter wrote:
I am logging arbitrary POD struct types with member names and
data:
void printStructInfo( T )( T info ) {
foreach( i, A; typeof( T.tupleof )) {
enum attribName = T.tupleof[i].stringof;
writefln( "%s : %s", attribName, mixin(
On Thursday, 5 October 2023 at 20:42:26 UTC, mw wrote:
On Thursday, 5 October 2023 at 20:07:38 UTC, user1234 wrote:
No. Sorry.
Generally compile time code cannot interact with the system.
To be evaluable at compile time code has to be strongly pure,
that is not the case of the function you
Hard to word this question right, but is it possible to get the
UDAs assigned to a class/structure's member variable declaration,
within that variable's definition? e.g.
```d
import std.stdio;
import std.traits;
enum SPECIAL;
struct Foo {
void foo() {
static if
On Monday, 25 April 2022 at 15:23:12 UTC, Ali Çehreli wrote:
auto arr = iota(10).map!(i => Foo(i.text)).array;
On Monday, 25 April 2022 at 16:11:47 UTC, rassoc wrote:
Foo[] arr = ["abc", "def", "ghi"].map!Foo.array;
Ahh that'll do it alright, thanks
```d
struct Foo {
string s;
this(string s) { this.s = s; }
}
Foo foo = "a";
Foo[] foos = ["a"]; // Error: cannot implicitly convert
expression `["a"]` of type `string[]` to `Foo[]`
Foo[] foos = cast(Foo[]) ["a"]; // Error: e2ir: cannot cast `"a"`
of type `string` to type `Foo`
On Monday, 25 April 2022 at 15:00:13 UTC, Alain De Vos wrote:
Not really an answer but this works,
```
void main(){
Foo foo = "a";
Foo[] foos;
foos ~=foo;
}%
```
Right, I can append individual elements, but can't assign or
append a slice of a type that can be individually cast to the
struct.
On Monday, 25 April 2022 at 15:13:51 UTC, Stanislav Blinov wrote:
Make it explicit:
```d
Foo[] foos = [Foo("a")];
```
There's that too, but I still have to iterate manually. e.g.:
```d
string[] ss = loadABunchOfStringsFromSomewhere();
//Foo[] foos = ss; //error
Foo[] foos;
On Monday, 25 April 2022 at 01:40:01 UTC, Alain De Vod wrote:
Following program is a single linked list.
We expect as output 1 2 3 1 2 3
But the output is only 1 2 3
```
If you don't need List to be treated as a true range, but just
want to iterate, a simple way to do this is with opApply:
On Tuesday, 26 April 2022 at 22:16:01 UTC, cc wrote:
Test application:
I should point out that all this stuff with saving refcounted
things to arrays and so on is extremely untested and experimental
One problem I'm seeing is the inability for a refcounted class to
pass itself to another
On Tuesday, 26 April 2022 at 21:33:43 UTC, Chris Katko wrote:
I swear I asked something like this before years ago but it
doesn't show up in my previous forum posts.
I'm looking for a construct that mimics using(var)/with(var)
```d
void draw_with(bitmap* drawb, void delegate() dg) {
On Tuesday, 26 April 2022 at 06:55:34 UTC, Alain De Vos wrote:
Can someone provide a simple/very simple reference counting or
refcounted example i can understand. Thanks.
I've been playing around with the automem[1] library's RefCounted
feature as we speak, it seems to fit my needs more than
On Monday, 16 May 2022 at 15:08:15 UTC, H. S. Teoh wrote:
If you find yourself having to cast to/from immutable, you're
using it wrong.
I clearly was, which is why I'm not using it anymore.
The question was "What are you stuck at? What was the most
difficult features to understand? etc.", so
On Wednesday, 11 May 2022 at 05:41:35 UTC, Ali Çehreli wrote:
What are you stuck at? What was the most difficult features to
understand? etc.
To make it more meaningful, what is your experience with other
languages?
Ali
Immutability. Ended up having to do so many hundreds of casts to
On Tuesday, 24 May 2022 at 02:55:06 UTC, Tejas wrote:
On Tuesday, 24 May 2022 at 02:29:38 UTC, cc wrote:
```d
import core.memory;
import core.stdc.stdlib : malloc, free;
import core.lifetime : emplace;
[...]
FWIW your code will compile if you add `extern(C++)` to `Foo`
Interesting, thanks.
```d
import core.memory;
import core.stdc.stdlib : malloc, free;
import core.lifetime : emplace;
T NEW(T, Args...)(auto ref Args args) /*@nogc*/ if (is(T ==
class)) {
enum size = __traits(classInstanceSize, T);
void* mem = malloc(size);
scope(failure) free(mem);
On Sunday, 3 July 2022 at 09:43:20 UTC, frame wrote:
app.d:
```d
module app;
import dimedll;
import std.stdio;
import std.stdio : log = writeln;
pragma(lib, "dimedll.lib");
void main() {
log("Lets build our own ime");
testFunc();
}
```
You should be able to change contents
```d
import std.traits;
class XML {}
class Def {
@XML {
int x;
int y;
}
int z;
this() {
static foreach (sym; getSymbolsByUDA!(Def, XML)) {
}
}
}
void main() {
auto def = new Def;
}
On Monday, 18 April 2022 at 03:21:30 UTC, H. S. Teoh wrote:
Structs in D ought to be treated like "glorified ints", as
Andrei puts it. If you need complex ctors and complex methods,
that's a sign you should be using a class instead.
Unless you're having a nice quiet get-together with friends,
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