Re: Getting RefCounted to work with classes
On Monday, 25 August 2014 at 21:14:03 UTC, Bienlein wrote:
Hello,
the code below compiles and runs fine. However, when I change
Payload from struct to class I get compiler errors:
Error 1 Error: template instance
std.typecons.RefCounted!(Payload,
cast(RefCountedAutoInitialize)1) does not match template
declaration RefCounted(T, RefCountedAutoInitialize autoInit =
RefCountedAutoInitialize.yes) if (!is(T ==
class)) C:\Users\Nutzer\Windows Ordner\Documents\Visual Studio
2013\Projects\RefCountedScratch\RefCountedScratch\main.d 26
I tried many things, but nothing did it. Any help appreciated
:-).
Thanks, Bienlein
import std.stdio;
import std.typecons;
struct Payload
{
private int num = 0;
this(int i)
{
num = i;
writefln(Payload's constructor called);
}
~this()
{
writefln(Payload's destructor called);
}
}
int main(string[] argv)
{
alias RefCounted!(Payload, RefCountedAutoInitialize.yes)
Data;
int bar = 12;
Data data = Data(bar);
return 0;
}
RefCounted does not work with classes. Classes are reference
types already.
The key is in the error message ...if(!is(T == class))...
restricts the template to non-class types only.
cheers,
uri
Re: D1: Error: duplicate union initialization for size
On 26/08/14 00:57, jicman wrote:
Ok, let's try something simpler... Where can I find the D1 v1.076
compiler error meaning of,
Error: duplicate union initialization for size
for this line,
const Size DEFAULT_SCALE = { 5, 13 };
How does the code for Size look like?
--
/Jacob Carlborg
Re: Getting RefCounted to work with classes
On Tuesday, 26 August 2014 at 06:01:25 UTC, uri wrote: RefCounted does not work with classes. Classes are reference types already. Yep, that's the problem. I also got some suspicion, then surfed the Internet and found the information about it. Thanks for explaining the error message to me. Now it even seems obvious to me what it wants to say ;-). But you can define a var inside a struct that holds a class and this way I got it working with my class as well thanks to generics in D. Woohoo!
Re: Learning D
On Monday, 25 August 2014 at 16:46:11 UTC, Ryan wrote: Me: Software developer for 30 years. What IDE should I use? I'm not big fan of Eclipse, although if If you are an Eclipse (CDT) user for C/C++, then you will find a very similar plugin for D, called DDT, here: http://code.google.com/p/ddt/
Re: Learning D
On 8/26/2014 5:37 AM, Ryan wrote: Then I thought I'd learn dub. Well, this is NOT going well... I did a git clone of gtk-d, then tried to build with dub (renamed the package.json to dub.json), and it told me Conflicting package multi-reference I have no clue and I've tried removing package references Any libraries you want to use that are registered in the dub registry[1] (which gtk-d is) should be added to your project's dub.json as dependencies (see [2] for an example of using gtk-d). This will cause dub to download and compile the libraries for you. You never have to pull any of them down or compile them yourself. I tried dub remove gtk-d --version=* but it just lists out excuses why it can't work... no retrieval journal found for..., Untracked file found This command will only remove libraries that dub is managing, not anything you have downloaded outside of dub and compiled directly. So then I try every variation of dub remove-local and dub remove-path I can think of. remove-local is the inverse of add-local, which you might use when you want to test a dub-enabled library that hasn't yet been added to the registry (such as a new but unreleased version of a registered library, or a library you are developing locally but haven't yet released). add-local tells dub to look on the local filesystem rather than through the dub registry for the library. I haven't looked at add-/remove-path yet, so no comment on those. [1] http://code.dlang.org/ [2] http://code.dlang.org/packages/gtk-d --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com
Re: Are there any exercises/challenges for D?
maik klein: Are there any exercises/challenges for D? Some exercises here: http://rosettacode.org/wiki/Reports:Tasks_not_implemented_in_D Please announce them here when you solve some of them :-) Bye, bearophile
Process Queue and Pool
I'm looking for a variant of taskPool but for pids created by spawnProcess. The typical patterns it to create a set of potentially created processes in ProcessQueue together with a ProcessPool that automatically pops for the ProcessQueue when their the number of activate processes in ProcessPool has below a certain counter which is a member of ProcessPool. Maybe the Queue and the Pool should be one aggregate. The typically usage is in a build system that only keeps a limited number of processes activate at the same time. Has anybody written such a thing?
Non-GC based List/Set/Map implementation?
Hello, does anyone know of a List/Set/Map implementation that does not rely on the GC? The would be the last thing I need for D to be really happy with it ;-) Thanks, Bienlein
Re: Learning D
On Mon, 2014-08-25 at 17:09 +, Kiith-Sa via Digitalmars-d-learn wrote: […] I don't use an IDE, but MonoD seems to be the most recommended cross-platform option. It has a wiki page here if it helps: http://wiki.dlang.org/Mono-D I just tried following the instructions at http://wiki.dlang.org/Mono-D and for Debian Sid, it doesn't work, I cannot get a MonoD install. Yes, Debian only has MonoDevelop 4, I downloaded MonoDevelop 5.4 from the site http://simendsjo.me/files/abothe/ -- Russel. = Dr Russel Winder t: +44 20 7585 2200 voip: sip:russel.win...@ekiga.net 41 Buckmaster Roadm: +44 7770 465 077 xmpp: rus...@winder.org.uk London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder signature.asc Description: This is a digitally signed message part
Re: Learning D
On Mon, 2014-08-25 at 18:09 +, Kiith-Sa via Digitalmars-d-learn wrote: […] I have no experience with GtkD, but with DUB you shouldn't need to mess with .lib files at all. DUB automatically downloads and compiles any libraries specified with dub.json, *and* links them with the compiled project. (still, it'd be better if someone with GtkD/MonoD experience could clarify) Dub happily downloads the GtkD source and builds the library, and then builds the application. I am happy to report that creating a working GtkD program with Dub was straightforward, It Just Worked™ -- Russel. = Dr Russel Winder t: +44 20 7585 2200 voip: sip:russel.win...@ekiga.net 41 Buckmaster Roadm: +44 7770 465 077 xmpp: rus...@winder.org.uk London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder signature.asc Description: This is a digitally signed message part
Re: Non-GC based List/Set/Map implementation?
On Tue, 26 Aug 2014 10:38:46 + Bienlein via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: does anyone know of a List/Set/Map implementation that does not rely on the GC? The would be the last thing I need for D to be really happy with it ;-) maybe thBase will help: https://github.com/Ingrater/thBase signature.asc Description: PGP signature
Re: Casting to union type?
On Tuesday, 26 August 2014 at 02:33:25 UTC, cc wrote: vec2 a = vec2(1.0, 2.0); // fine vec2 b; b = [3.0, 4.0]; //fine vec2 c = [5.0, 6.0]; // cannot cast float[] to vec2 There is currently no implicit for aggregates except using `alias this`. But in your example, it's a construction, not an assignment, so you need to write an appropriate constructor `this(float[])` analogous to `opAssign(float[])`.
Re: Learning D
On Mon, 2014-08-25 at 16:46 +, Ryan via Digitalmars-d-learn wrote: […] What Widget library should I use? I started with GTKD, but since there are no tutorials does this mean nobody actually does this? Should I use DWT? What about QT? GtkD should work for you. I would have preferred Qt for portability but QtD doesn't work for me, I actually want to use QML, and GtkD just worked. I didn't bother with an IDE to start with just used Emacs and a Shell, though I am sure VIM would do as well, Sublime Text or even Notepad ++ :-) I created a directory with a source directory added the D source in it and then edited a Dub specification file, ran dub and it all just compiled to a working executable. -- Russel. = Dr Russel Winder t: +44 20 7585 2200 voip: sip:russel.win...@ekiga.net 41 Buckmaster Roadm: +44 7770 465 077 xmpp: rus...@winder.org.uk London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder signature.asc Description: This is a digitally signed message part
Re: Casting to union type?
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;
}
float[2] v;
}
this(float x, float y) {
this.x = x;
this.y = y;
}
this(float[v.length] f) {
v[0..length] = f[0..length];
}
alias v this;
}
C style function pointers
I am trying top port this code :
float interpolate( float from, float to, float amount, float
(*easing)(float) )
{
return from + ( to-from )*( easing( amount ) );
}
float linear_interpolation( float p )
{
return p;
}
the float (*easing)(float) part needs to be rewritten as
float function(float) easing as far as I know and could find
here http://dlang.org/deprecate.html#C-style function pointers.
so my code is written as:
import std.stdio;
float interpolate(float from, float to, float amount, float
function(float) easing)
{
return from + (to - from) * (easing(amount));
}
float lineair_interpolation(float p)
{
return p;
}
void main()
{
writeln(interpolate(100,100,10, lineair_interpolation));
}
this errors witha : Error: function test.lineair_interpolation
(float p) is not callable using argument types (), but I don't
really know where to go from here.
Re: C style function pointers
On Tuesday, 26 August 2014 at 12:26:45 UTC, nikki wrote:
void main()
{
writeln(interpolate(100,100,10, lineair_interpolation));
}
this errors witha : Error: function test.lineair_interpolation
(float p) is not callable using argument types (), but I don't
really know where to go from here.
You need to put an `` before the function name:
writeln(interpolate(100,100,10, lineair_interpolation));
Re: C style function pointers
On Tue, 26 Aug 2014 12:26:43 + nikki via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: this errors witha : Error: function test.lineair_interpolation (float p) is not callable using argument types (), but I don't really know where to go from here. you need to use '' to get function pointer. i.e. writeln(interpolate(100,100,10, lineair_interpolation)); signature.asc Description: PGP signature
Re: C style function pointers
thanks, that worked, I need to grow a feeling for those * and
Re: Process Queue and Pool
On Tuesday, 26 August 2014 at 09:57:57 UTC, Nordlöw wrote: Has anybody written such a thing? I guess the logic of this ProcessPool should run in its own thread by default and be protected in the same way that taskPool. Of course one solution is to reuse taskPool and spawn one thread or fiber (when it becomes available in std.concurrency) for each currently active Process, right?
Re: Non-GC based List/Set/Map implementation?
On Tuesday, 26 August 2014 at 10:38:47 UTC, Bienlein wrote: Hello, does anyone know of a List/Set/Map implementation that does not rely on the GC? The would be the last thing I need for D to be really happy with it ;-) Thanks, Bienlein These use the work-in-progress std.allocator and seem to be more maintained, although they don't seem to take advantage of DMD 2.066 (@nogc) yet: https://github.com/economicmodeling/containers
There is a bug for '-unittest'?
Hello,every one:
There is a unit test for a.d,it will be pass,do you think it's
right?
or it's my error?
/// the file name is a.d
class Math
{
/// add function
static int add(int x, int y) { return x + y; }
///
unittest
{
// assert(add(2, 2) == 5);
assert(add(-2,0) == 0);
}
}
class Sum {
int add(int x, int y) { return x + y; }
unittest
{
Sum sum = new Sum;
//assert(sum.add(-2,0) == -2);
assert(sum.add(-2,0) == 2);
}
}
void main()
{
}
build.bat
dmd -unittest a.d
pause
-end
Thank you.
Re: There is a bug for '-unittest'?
On Tue, 26 Aug 2014 13:38:17 + FrankLike via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: dmd -unittest a.d so? you compiled the code. but you need to run the resulting .exe to invoke unittests. or just use 'rdmd' instead. signature.asc Description: PGP signature
Re: There is a bug for '-unittest'?
On Tuesday, 26 August 2014 at 13:49:39 UTC, ketmar via Digitalmars-d-learn wrote: On Tue, 26 Aug 2014 13:38:17 + FrankLike via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: dmd -unittest a.d so? you compiled the code. but you need to run the resulting .exe to invoke unittests. or just use 'rdmd' instead. Thank you,l use it by d.chm.
literate programming in D
I've been googling without luck, is there a way to do literate programming in D?, similar to how it's done in Coffeescript ? http://www.coffeescriptlove.com/2013/02/literate-coffeescript.html basically me writing comments around code and some parser that creates styled documents from that (with highlighted source code), the current documentation system doesn't export the source code. anybody done this before?
Re: literate programming in D
nikki: I've been googling without luck, is there a way to do literate programming in D? D1 had built-in support for literate programming, but it was removed from D2 because it was regarded as not useful enough: http://digitalmars.com/d/1.0/html.html I find literate Haskell programs all the time: gist.github.com/nooodl/e23337d0175ad66ea5f0 Or F# ones: http://tomasp.net/blog/2014/puzzling-fsharp/ Bye, bearophile
Re: Non-GC based List/Set/Map implementation?
Thanks for the replies. This looks good. I meanwhile found http://dsource.org/projects/dcollections But it seems to be GC-based just like Tango ... ;-(.
Re: literate programming in D
Aha, then It's quite safe to assume it won't be coming back I guess, then I might need to cook up some homebrew alternative. thanks for the info
Re: Learning D
On Monday, 25 August 2014 at 16:46:11 UTC, Ryan wrote: What IDE should I use? I'm not big fan of Eclipse, although if I had to use it this wouldn't be a dealbreaker. Give me something easy and lightweight, unless you've got a GUI builder (this is why I started with MonoDevelop, though this isn't working so well for me). If you can do without all bells and whistles of a fullblown IDE, you can try geany. I really like it and do all my D (and python/shell/perl) work with geany. http://www.geany.org/ You just install dmd (or gdc or ldc) and add it to your PATH. You download and install geany. You configure the build/compile settings for geany eg: rdmd --build-only --force -debug %f And there you go. Geany is available for Windows and Linux.
Re: literate programming in D
On Tuesday, 26 August 2014 at 14:55:08 UTC, nikki wrote: I've been googling without luck, is there a way to do literate programming in D?, similar to how it's done in Coffeescript ? http://www.coffeescriptlove.com/2013/02/literate-coffeescript.html basically me writing comments around code and some parser that creates styled documents from that (with highlighted source code), the current documentation system doesn't export the source code. anybody done this before? Would org-mode in Emacs work for you? That's what I use. http://orgmode.org/worg/org-contrib/babel/intro.html
Re: Is this a bug when creating proxies in classes?
On Monday, 25 August 2014 at 21:14:42 UTC, Ali Çehreli wrote: On 08/25/2014 12:17 PM, Marc Schütz schue...@gmx.net wrote: On Monday, 25 August 2014 at 19:12:48 UTC, Marc Schütz wrote: On Monday, 25 August 2014 at 18:44:36 UTC, Ali Çehreli wrote: It can be explained if the mixed-in template is evaluated at the mixin context without bringing in the imported modules to that context. I don't know whether it is true or whether it is a known limitation. You're right, that's it! It works when I import std.traits first. So... the fix is to import std.traits inside template Proxy. Going to submit a PR. https://github.com/D-Programming-Language/phobos/pull/2463 Thanks! And I learned from you in the pull request the following fact: quote Quoting http://dlang.org/template-mixin : Unlike a template instantiation, a template mixin's body is evaluated within the scope where the mixin appears, not where the template declaration is defined. It is analogous to cutting and pasting the body of the template into the location of the mixin. /quote Ali With that in mind what is strange is that if in my example you change the class for a struct everything works as expected. Why is that?
Re: literate programming in D
That would work very fine, thanks sir!
Re: D1: Error: duplicate union initialization for size
On 08/25/2014 11:36 PM, Jacob Carlborg wrote:
On 26/08/14 00:57, jicman wrote:
Ok, let's try something simpler... Where can I find the D1 v1.076
compiler error meaning of,
Error: duplicate union initialization for size
for this line,
const Size DEFAULT_SCALE = { 5, 13 };
How does the code for Size look like?
In case it helps you or others to answer, the code appears in D2 as well:
https://github.com/D-Programming-Language/dmd/blob/master/src/todt.c#L908
The following bug is fixed for D2, which may be the same issue:
https://issues.dlang.org/show_bug.cgi?id=8902
Ali
Re: Is this a bug when creating proxies in classes?
On Tuesday, 26 August 2014 at 18:13:52 UTC, Gary Willoughby wrote: With that in mind what is strange is that if in my example you change the class for a struct everything works as expected. Why is that? This is bizarre... I tried a few things, but I have no idea. At first I thought the `static if` that calls `isArray` is inside another `static if`, but this is not the case. Might be a compiler bug?
whats happening to my binary file size?
I wasnt paying any attention to the file size of my binaries when i started using D. My first program is simple and compiles at 486kb, which honestly, is kind of absurd but anyways, after i start adding other imports it ran all the way up to 4.5mb. what i want to ask is, what exactly is happening to my binary when all i do is import various modules?
Re: whats happening to my binary file size?
On Tuesday, 26 August 2014 at 23:36:44 UTC, Israel wrote: I wasnt paying any attention to the file size of my binaries when i started using D. My first program is simple and compiles at 486kb, which honestly, is kind of absurd but anyways, after i start adding other imports it ran all the way up to 4.5mb. what i want to ask is, what exactly is happening to my binary when all i do is import various modules? Conjecture: your binary has its imports statically linked in, and your linker doesn't remove unused code (--gc-sections). https://issues.dlang.org/show_bug.cgi?id=879
Re: whats happening to my binary file size?
On Tuesday, 26 August 2014 at 23:36:44 UTC, Israel wrote: I wasnt paying any attention to the file size of my binaries when i started using D. My first program is simple and compiles at 486kb, which honestly, is kind of absurd but anyways, after i start adding other imports it ran all the way up to 4.5mb. what i want to ask is, what exactly is happening to my binary when all i do is import various modules? You can see what's taking up space by upload a .map file here: http://thecybershadow.net/d/mapview/
Re: whats happening to my binary file size?
On Wednesday, 27 August 2014 at 01:41:51 UTC, Messenger wrote: On Tuesday, 26 August 2014 at 23:36:44 UTC, Israel wrote: I wasnt paying any attention to the file size of my binaries when i started using D. My first program is simple and compiles at 486kb, which honestly, is kind of absurd but anyways, after i start adding other imports it ran all the way up to 4.5mb. what i want to ask is, what exactly is happening to my binary when all i do is import various modules? Conjecture: your binary has its imports statically linked in, and your linker doesn't remove unused code (--gc-sections). https://issues.dlang.org/show_bug.cgi?id=879 I see, thanks man. From what i understand is that this is a unintended feature rather than a direct bug in order to make my life easier? I know that object files are stored in .a libraries but all this seems too advanced for me to understand...
Re: D1: Error: duplicate union initialization for size
On Tuesday, 26 August 2014 at 06:36:59 UTC, Jacob Carlborg wrote:
On 26/08/14 00:57, jicman wrote:
Ok, let's try something simpler... Where can I find the D1
v1.076
compiler error meaning of,
Error: duplicate union initialization for size
for this line,
const Size DEFAULT_SCALE = { 5, 13 };
How does the code for Size look like?
I wish I knew. :-( Above, in this same post I pasted all lines
that had Size and right below it all lines that had size. These
are all the places where Size is found. If you can tell me which
one you think it is, I can grab that piece of the code.
Tehse are all the lines where Size is found in all the dfl
library files:
clientSize = Size(340, 150);
final Size size() // getter
Size result;
Size defaultSize() // getter
return Size(75, 23);
override Size defaultSize() // getter
return Size(120, 23); // ?
final Size clientSize() // getter
final void clientSize(Size sz) // setter
//wclientsz = Size(width, height);
final void size(Size sz) // setter
final Size size() // getter
return wrect.size; // struct Size, not sizeof.
final Size getAutoScaleSize(Font f)
Size result;
final Size getAutoScaleSize()
package final Size _fetchClientSize()
return Size(r.right, r.bottom);
Size defaultSize() // getter
return Size(0, 0);
Size wclientsz;
deprecated final void autoScrollMargin(Size sz) // setter
deprecated final Size autoScrollMargin() // getter
return Size(0, 0);
deprecated final void autoScrollMinSize(Size sz) // setter
deprecated final Size autoScrollMinSize() // getter
return Size(0, 0);
final Size autoScaleBaseSize() // getter
final void autoScaleBaseSize(Size newSize) // setter
static Size calcScale(Size area, Size toScale, Size fromScale)
// package
Size calcScale(Size area, Size toScale) // package
final void _scale(Size toScale) // package
void xscale(Control c, Size fromScale)
Size sz;
sz = calcScale(Size(c.left, c.top), toScale,
fromScale);
final void scrollSize(Size sz) // setter
final Size scrollSize() // getter
const Size DEFAULT_SCALE = { 5, 13 };
//Size scrollmargin, scrollmin;
Size autossz = DEFAULT_SCALE;
Size scrollsz = { 0, 0 };
Point opAdd(Size sz)
Point opSub(Size sz)
void opAddAssign(Size sz)
void opSubAssign(Size sz)
struct Size // docmain
/// Construct a new Size.
static Size opCall(int width, int height)
Size sz;
static Size opCall()
Size sz;
Dequ opEquals(Size sz)
Size opAdd(Size sz)
Size result;
Size opSub(Size sz)
Size result;
void opAddAssign(Size sz)
void opSubAssign(Size sz)
Size size() //getter
return Size(width, height);
void size(Size sz) // setter
static Rect opCall(Point location, Size size)
void inflate(Size insz)
Size size(); // getter
final override Size size() // getter
return Size(bm.bmWidth, bm.bmHeight);
Size sz;
Size sz;
final override Size size() // getter
Size result;
final Size getSize(HDC hdc) // package
return Size(getWidth(hdc), getHeight(hdc));
final Size getSize(Graphics g)
return Size(getWidth(g), getHeight(g));
Size sz;
final Size measureText(Dstring text, Font font)
return Size(sz.cx, sz.cy);
final Size measureText(Dstring text, Font font, int maxWidth,
TextFormat fmt)
return Size(rect.right - rect.left, rect.bottom - rect.top);
final Size measureText(Dstring text, Font font, TextFormat fmt)
final Size measureText(Dstring text, Font font, int maxWidth)
final Size measureText(Dstring text, Font font)
final Size getScaleSize(Font f)
Size result;
final Size size() // getter
return Size(_w, _h);
final override Size size() // getter
return Size(bm.bmWidth, bm.bmHeight);
protected override Size defaultSize() // getter
return Size(300, 300);
//Size csz;
final void minimumSize(Size min) // setter
Size changesz;
final Size minimumSize() // getter
final void maximumSize(Size max) // setter
Size changesz;
final Size maximumSize() // getter
Size autoscaleBase;
Size minsz, maxsz; // {0, 0} means none.
wclientsz =
Re: 'idiomatic' porting of c and or c++ code that does NULL checking
On Monday, 25 August 2014 at 03:19:09 UTC, Mike Parker wrote: I use Exception for recoverable errors and Error for those that aren't. Sorry, you're right, that description of Exception/Error is correct. But I don't think that SDL initialization is a non-recoverable error. The program might want to retry SDL initialization with different parameters, and if that code would make it into a library, said library might try using a different graphics library or use some other form of user interaction.
Re: 'idiomatic' porting of c and or c++ code that does NULL checking
On Wednesday, 27 August 2014 at 05:45:34 UTC, eles wrote: On Wednesday, 27 August 2014 at 05:39:59 UTC, Vladimir Panteleev wrote: On Monday, 25 August 2014 at 03:19:09 UTC, Mike Parker wrote: failure and the SIGKILL. (and SIGKILL just because you cannot catch it, otherwise you could yell at the user...)
Re: 'idiomatic' porting of c and or c++ code that does NULL checking
On Wednesday, 27 August 2014 at 05:39:59 UTC, Vladimir Panteleev wrote: On Monday, 25 August 2014 at 03:19:09 UTC, Mike Parker wrote: Sorry, you're right, that description of Exception/Error is correct. But I don't think that SDL initialization is a non-recoverable error. The program might want to retry SDL initialization with different parameters While this may be true in this case, I think that, in general, you cannot draw such a clear line between what's recoverable and what's not. If you really want to push things to the extreme, the sole unrecoverable error shall be assertion failure and the SIGKILL. Everything else could be otherwise handled, even if for that you'd need to program a new operating system inside your program, just because the one that intend to use is missing ;) No, that's extreme. But, matter is, what is recoverable and what not, is a matter of what the architect (and the specification) decide to be.
