Re: Command Line Application in D
On Monday, 4 August 2014 at 22:03:24 UTC, TJB wrote: On Monday, 4 August 2014 at 21:58:09 UTC, maarten van damme via Digitalmars-d-learn wrote: I am a little bit confused as to what you want. There is a command line example at dlang.org, and there exists a program (rdmd) that compiles several D files and runs them. http://dlang.org/rdmd.html Sorry. I wasn't very clear. Say I want to find all of the files that have a certain extension within a directory and process them somehow at the command line. How could I do that? Have a look at the function dirEntries in std.file. regards, -mike-
Re: building a D app with multiple source files
edit : btw, I understand how to build an app that conscists out of a few source files, I'd just do 'dmd file1.d file2.d' I amtalking here about the situation where that's unpractical because of the amount and folder structure.
Re: building a D app with multiple source files
On Tuesday, 5 August 2014 at 07:27:18 UTC, nikki wrote: Hello, I am completely new to D and have been paying around with the tutorials, some docs and little test programs. Now I want to try and use https://github.com/elvisxzhou/artemisd for little gamedev experiment but I am running into build issues. That project doesn't have a Makefile in the repo, and I am on linux so I need to build it on the terminal, I've read about rdmd (and tried it without success) and found a few 'general' usage Makefiles, can't get any to just work when I type 'make all'. in the repo I linked to (artemisd) there are dozens of source files in various folders, and an example i have to compile at the same time I think. could someone show me how it's done ? What issues have you had with rdmd? The library seems to have a package.json file, so you could also try dub: http://code.dlang.org/download
building a D app with multiple source files
Hello, I am completely new to D and have been paying around with the tutorials, some docs and little test programs. Now I want to try and use https://github.com/elvisxzhou/artemisd for little gamedev experiment but I am running into build issues. That project doesn't have a Makefile in the repo, and I am on linux so I need to build it on the terminal, I've read about rdmd (and tried it without success) and found a few 'general' usage Makefiles, can't get any to just work when I type 'make all'. in the repo I linked to (artemisd) there are dozens of source files in various folders, and an example i have to compile at the same time I think. could someone show me how it's done ?
Re: spawnProcess command-line arguments help
On Sunday, 3 August 2014 at 23:48:09 UTC, Martin wrote: When I use the spawnProcess function in std.process, the command line arguments that I provide to the function seem to get quoted. Is there a way to tell the spawnProcess function that I want the command line arguments to be non-quoted? Example: spawnProcess([SomePath\\Test.exe], [-silent]); I assume you mean: spawnProcess([SomePath\\Test.exe, -silent]); and the command line becomes: SomePath\Test.exe -silent (with the quotes exaclt like shown). Unfortunately (for some strange reason), the spawned process only responds to non-quoted arguments passed through the command line. So the command line should be exactly: SomePath\Test.exe -silent Is there any way to achieve this? No, there currently is no way to achieve this using spawnProcess. You could have better luck using spawnShell instead. I would consider such behavior a bug in the application you're trying to run, as it does not perform command-line parsing according to convention (CommandLineToArgvW). It would be possible to enhance spawnProcess and family to only quote arguments which need to be quoted, which would fix this particular case, however of course that can't address every program which parses its command line in a non-standard way.
Re: building a D app with multiple source files
On Tuesday, 5 August 2014 at 07:29:46 UTC, nikki wrote: edit : btw, I understand how to build an app that conscists out of a few source files, I'd just do 'dmd file1.d file2.d' I amtalking here about the situation where that's unpractical because of the amount and folder structure. With rdmd, simply run `rdmd --build-only mainfile.d` (mainfile.d being the file that contains the main function). Omit --build-only to build the program to a temporary directory, then run it.
Re: building a D app with multiple source files
On Tuesday, 5 August 2014 at 07:29:46 UTC, nikki wrote: edit : btw, I understand how to build an app that conscists out of a few source files, I'd just do 'dmd file1.d file2.d' I amtalking here about the situation where that's unpractical because of the amount and folder structure. You can take a look at the dub build tool to automate all this (as mentioned above). Dub works by compiling and linking everything together in your source folder. You specify the main entry point in a dub.json file. It's pretty easy to use and good for handling dependencies over the internet. To compile things manually you can use rdmd to automatically parse the files that need compiling. When using rdmd you only need to specify the file that contains the main function to build everything around it. for example: rdmd program.d This will pull in all imports inside program.d and compile and link them too.
Re: spawnProcess command-line arguments help
On Monday, 4 August 2014 at 17:02:27 UTC, Peter Alexander wrote: On Sunday, 3 August 2014 at 23:48:09 UTC, Martin wrote: When I use the spawnProcess function in std.process, the command line arguments that I provide to the function seem to get quoted. I can't reproduce this on OS X with 2.066rc1 (args are unquoted). Arguments on POSIX systems are passed to programs in a different way than on Windows. On POSIX, the arguments are passed as an array of zero-terminated strings (when a command is given as a string, a shell breaks it up into an argument array before running the program). On Windows, the arguments are passed as a string, and are parsed into an array by the executed program (or its language runtime). Although generally Windows programs use the OS function CommandLineToArgvW, they have no obligation to do so, and may implement their own algorithm.
Re: building a D app with multiple source files
What issues have you had with rdmd? The library seems to have a package.json file, so you could also try dub: http://code.dlang.org/download nikki@crunchbang:~/projects/d/artemisd$ rdmd example/source/app.d example/source/app.d(5): Error: module all is in file 'artemisd/all.d' which cannot be read import path[0] = example/source import path[1] = /usr/include/dmd/phobos import path[2] = /usr/include/dmd/druntime/import Failed: [dmd, -v, -o-, example/source/app.d, -Iexample/source] nikki@crunchbang:~/projects/d/artemisd$ rdmd --makedepend example/source/app.d example/source/app.d(5): Error: module all is in file 'artemisd/all.d' which cannot be read import path[0] = example/source import path[1] = /usr/include/dmd/phobos import path[2] = /usr/include/dmd/druntime/import Failed: [dmd, -v, -o-, example/source/app.d, -Iexample/source]
Re: building a D app with multiple source files
On Tuesday, 5 August 2014 at 07:43:56 UTC, nikki wrote: What issues have you had with rdmd? The library seems to have a package.json file, so you could also try dub: http://code.dlang.org/download nikki@crunchbang:~/projects/d/artemisd$ rdmd example/source/app.d example/source/app.d(5): Error: module all is in file 'artemisd/all.d' which cannot be read import path[0] = example/source import path[1] = /usr/include/dmd/phobos import path[2] = /usr/include/dmd/druntime/import Failed: [dmd, -v, -o-, example/source/app.d, -Iexample/source] nikki@crunchbang:~/projects/d/artemisd$ rdmd --makedepend example/source/app.d example/source/app.d(5): Error: module all is in file 'artemisd/all.d' which cannot be read import path[0] = example/source import path[1] = /usr/include/dmd/phobos import path[2] = /usr/include/dmd/druntime/import Failed: [dmd, -v, -o-, example/source/app.d, -Iexample/source] The search path does not include the artemisd package. Try: cd .. rdmd artemisd/example/source/app.d Or : rdmd -I.. example/source/app.d
Re: building a D app with multiple source files
On Tuesday, 5 August 2014 at 07:46:05 UTC, Vladimir Panteleev wrote: On Tuesday, 5 August 2014 at 07:43:56 UTC, nikki wrote: What issues have you had with rdmd? The library seems to have a package.json file, so you could also try dub: http://code.dlang.org/download nikki@crunchbang:~/projects/d/artemisd$ rdmd example/source/app.d example/source/app.d(5): Error: module all is in file 'artemisd/all.d' which cannot be read import path[0] = example/source import path[1] = /usr/include/dmd/phobos import path[2] = /usr/include/dmd/druntime/import Failed: [dmd, -v, -o-, example/source/app.d, -Iexample/source] nikki@crunchbang:~/projects/d/artemisd$ rdmd --makedepend example/source/app.d example/source/app.d(5): Error: module all is in file 'artemisd/all.d' which cannot be read import path[0] = example/source import path[1] = /usr/include/dmd/phobos import path[2] = /usr/include/dmd/druntime/import Failed: [dmd, -v, -o-, example/source/app.d, -Iexample/source] The search path does not include the artemisd package. Try: cd .. rdmd artemisd/example/source/app.d Or : rdmd -I.. example/source/app.d Correction: rdmd -Isource example/source/app.d
Re: building a D app with multiple source files
Correction: rdmd -Isource example/source/app.d that one worked, woohoo thanks. what did the -Isource do? it's not in the 'rdmd --help'
Re: building a D app with multiple source files
On Tuesday, 5 August 2014 at 07:51:53 UTC, nikki wrote: Correction: rdmd -Isource example/source/app.d that one worked, woohoo thanks. what did the -Isource do? it's not in the 'rdmd --help' You'll find it in dmd's --help. It adds the source directory to the search path, the list of directories where the compiler looks for imported modules.
Re: building a D app with multiple source files
On Tuesday, 5 August 2014 at 07:57:57 UTC, Vladimir Panteleev wrote: On Tuesday, 5 August 2014 at 07:51:53 UTC, nikki wrote: Correction: rdmd -Isource example/source/app.d that one worked, woohoo thanks. what did the -Isource do? it's not in the 'rdmd --help' You'll find it in dmd's --help. It adds the source directory to the search path, the list of directories where the compiler looks for imported modules. edit: couldn't find that flag in dmd --help (only -Ipath), atleast I know what it does now, hope I'll remember.. thanks a lot though @ great helpful community
Re: Help with porting grammar from PEGjs to D for dustjs project!
Different formats and also different languages. I don't see how you can compare a parse tree that's a D object and another tree made by dustjs: you never see the AST produced by dust, you only see the resulting JS code. Yes. That's a point. Thanks for all the explanations. I'll try to make something useful of it.
Re: building a D app with multiple source files
On 8/5/2014 5:06 PM, nikki wrote: On Tuesday, 5 August 2014 at 07:57:57 UTC, Vladimir Panteleev wrote: On Tuesday, 5 August 2014 at 07:51:53 UTC, nikki wrote: Correction: rdmd -Isource example/source/app.d that one worked, woohoo thanks. what did the -Isource do? it's not in the 'rdmd --help' You'll find it in dmd's --help. It adds the source directory to the search path, the list of directories where the compiler looks for imported modules. edit: couldn't find that flag in dmd --help (only -Ipath), atleast I know what it does now, hope I'll remember.. thanks a lot though @ great helpful community The switch itself is -I, not -Ipath. 'path' indicates a parameter for which you need to substitute something, in this case a directory path. It should be the root folder for the source modules you want to add to the search path. In this case, for artemisd, the source files are in the 'source' directory, so -Isource is what you pass to dmd. If the directory were named 'foo' instead, you would pass -Ifoo. --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com
Re: Threadpools, difference between DMD and LDC
On Mon, 2014-08-04 at 18:34 +, Dicebot via Digitalmars-d-learn wrote: […] Well it is a territory not completely alien to me either ;) I am less aware of academia research on topic though, just happen to work in industry where it matters. I have been out of academia now for 14 years, but tracking the various lists and blogs, not to mention SuperComputing conferences, there is very little new stuff, the last 10 has been about improving. The one new thing is though GPGPU, which started out as an interesting side show but has now come front and centre for data parallelism. I think initial spread of multi-threading approach has happened because it was so temptingly easy - no need to worry about actually modelling the concurrency execution flow, blocking I/O or scheduling; just write the code as usual and OS will take care of it. But there is no place for magic in programming world in it has fallen hard once network services started to scale. Threads are infrastructure just like stack and heap, very, very, very few people actually worry about and manage these resources explicitly, most just leave the run time system to handle it. OK so the usual GC argument can be plopped in here, let's not bother though as we've been through it three times this quarter :-) Right now is the glorious moment when engineers are finally starting to appreciate how previous academia research can help them solve practical issues and all this good stuff goes mainstream :) Actors are mid 1960s, dataflow early 1970s, CSP mid 1970s, it has taken the explicit shared-memory multithreading in applications fiasco a long time to pass. I can think of some applications which are effectively operating systems and so need all the best shared-memory multithreading techniques (I was involved in one 1999–2004), but most applications people should be using actors, dataflow, CSP or data parallelism as their applications model supported by library frameworks/infrastructure. […] Doubt programming / engineering community will ever accept research that states that choosing architecture can be done on pure theoretical basis :) It simply contradicts too much all daily experience which says that every concurrent application has some unique traits to consider and only profiling can rule them all. Most solutions to problems or subproblems can be slotted into one of actors, dataflow, pipeline, MVC, data parallelism, event loop for the main picture. If tweaking is needed, profiling and small localized tinkerings can do the trick. I have yet to find many cases in my (computation oriented) world where that is needed. Maybe in an I/O world there are different constraints. -- 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: building a D app with multiple source files
The switch itself is -I, not -Ipath. 'path' indicates a parameter for which you need to substitute something, in this case a directory path. It should be the root folder for the source modules you want to add to the search path. In this case, for artemisd, the source files are in the 'source' directory, so -Isource is what you pass to dmd. If the directory were named 'foo' instead, you would pass -Ifoo. aha! that would've bitten me in the future, now I get it, thanks.
Re: Help with porting grammar from PEGjs to D for dustjs project!
On Tuesday, 5 August 2014 at 08:13:25 UTC, Uranuz wrote: Different formats and also different languages. I don't see how you can compare a parse tree that's a D object and another tree made by dustjs: you never see the AST produced by dust, you only see the resulting JS code. Yes. That's a point. Thanks for all the explanations. I'll try to make something useful of it. Is there multiline comments available inside PEGGED template? As far as I understand inline comments are set via # sign.
Re: How to easily construct objects with multi-param constructors from lazy ranges?
On Tuesday, 5 August 2014 at 15:13:37 UTC, Rene Zwanenburg wrote: clean looking code to parse Wavefont OBJ files [0]. [0] http://en.wikipedia.org/wiki/Wavefront_.obj_file
Re: unittest affects next unittest
On Saturday, 2 August 2014 at 06:46:04 UTC, Jonathan M Davis via Digitalmars-d-learn wrote: On Fri, 01 Aug 2014 23:09:37 + sigod via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: Code: http://dpaste.dzfl.pl/51bd62138854 (It was reduced by DustMite.) Have I missed something about structs? Or this simply a bug? Don't do this with a member variable: private Node * _root = new Node(); Directly initializing it like that sets the init value for that struct, and that means that every struct of that type will have exactly the same value for _root, so they will all share the same root rather than having different copies. You need to initialize _root in the constructor. - Jonathan M Davis So, it's a static initialization? Documentation didn't mention it. (In class' section only 2 sentences about it and none in struct's section.) This is different from many languages (C#, Java... don't know about C and C++). What was the reason to make this initialization static?
How to easily construct objects with multi-param constructors from lazy ranges?
Here's something which I've run into a few times now without
finding a pretty solution. When parsing a text file using lazy
ranges and algorithms you will have to convert a string range to
an object at some point.
In this particular case I was curious to see if I could write
clean looking code to parse Wavefont OBJ files [0]. A simple OBJ
file could look like this:
v 0 1 0
v 1 1 0
v 1 0 0
v 0 0 0
vn 0 0 1
f 3//1 2//1 1//1
f 3//1 4//1 2//1
Now, to parse the vertex positions (the lines beginning with 'v')
I use:
struct vec3
{
float[3] v;
this(float x, float y, float z){ ... }
}
void foo()
{
auto lines =
File(SomeFile.obj)
.byLine
.map!(a = a.strip)
.filter!(a = !a.empty)
.filter!(a = !a.startsWith('#'));
auto vertices =
lines
.filter!(a = a.startsWith('v'))
.map!(a = a.splitter)
// Now what?
}
What is a nice way to convert the forward range [v, 0, 1,
0] to a vec3, without unneccessary allocations? Creating a
constructor function like
vec3 parseVec(R)(R range)
{
vec3 v;
v.v[0] = range.front.to!float;
range.popFront();
// Etc.
return v;
}
seems terribly awkward to me.
Some range which takes an at compile time known number of
elements from an input range and provides opIndex seems perfect
to me, but as far as I know there's no such thing in Phobos. It
would allow
auto vertices =
lines
.filter!(a = a.startsWith('v'))
.map!(a = a.splitter)
.map!(a = a.staticChunks!4)
.map!(a = vec3(a[1].to!float, a[2].to!float, a[3].to!float));
without heap allocations. Anyone know if Phobos has something
like this? Or another approach?
If not I'm willing to create something like staticChunks if
there's interest to add it to std.range.
Re: Preferred program config file format and parsing library?
On Saturday, 2 August 2014 at 12:42:00 UTC, Gary Willoughby wrote: What is the preferred format people here use for program config files? Json, Xml, ini, etc? Also what libraries exist to parse the preferred format? Preffered one is the one a RTL(run time library) or a VCL(visual component library) uses. I hate those using markups, like xml. ugly, hard to edit eg in notepad. I hate ini. ini is kind of a beginner format. ini is ridiculous. A good config file format has to - be editable. - be strongly used in the lang. standard library: the one used cause it's good. - not ini. ini files = child happy to discover he can save and load settings. - convertible: even if it's a proprietary format it must be convertible to json or xml or yaml (or ini for the children). https://en.wikipedia.org/wiki/Marshalling_(computer_science).
Re: building a D app with multiple source files
On Tuesday, 5 August 2014 at 08:06:57 UTC, nikki wrote: edit: couldn't find that flag in dmd --help (only -Ipath), atleast I know what it does now, hope I'll remember.. thanks a lot though @ great helpful community Remember rdmd is just a program to help collect and organise parameters. It still passes everything to dmd. In fact if you use the --chatty option with rdmd it will show you everything it is doing including what it is passing to dmd.
Dub failing to detect Shared Libraries
I am porting DerelictBGFX to linux, but I am having some
problems. When I run the dub command in my example directory, I
get the following error :
derelict.util.exception.SharedLibLoadException@../../../.dub/packages/derelict-util-1.0.2/source/derelict/util/exception.d(35):
Failed to load one or more shared libraries:
libbgfx-shared-libRelease.so - libbgfx-shared-libRelease.so:
cannot open shared object file: No such file or directory
libbgfx-shared-libDebug.so - libbgfx-shared-libDebug.so: cannot
open shared object file: No such file or directory
Here is the file I edited to detect those libaries :
https://github.com/shrub77/DerelictBgfx/blob/master/source/derelict/bgfx/bgfx.d#L55
Here is the dub.json :
{
name: 00-helloworld,
sourcePaths: [.],
targetType: executable,
mainSourceFile: helloworld.d,
dependencies:
{
gfm:sdl2: =1.1.4,
derelict-bgfx: {path: ../../, version: ~master}
}
}
Where should I put the *.so files so they can be detected
properly by dub?
Rishub
Re: unittest affects next unittest
On Tuesday, 5 August 2014 at 15:39:55 UTC, sigod wrote: On Saturday, 2 August 2014 at 06:46:04 UTC, Jonathan M Davis via Digitalmars-d-learn wrote: On Fri, 01 Aug 2014 23:09:37 + sigod via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: Code: http://dpaste.dzfl.pl/51bd62138854 (It was reduced by DustMite.) Have I missed something about structs? Or this simply a bug? Don't do this with a member variable: private Node * _root = new Node(); Directly initializing it like that sets the init value for that struct, and that means that every struct of that type will have exactly the same value for _root, so they will all share the same root rather than having different copies. You need to initialize _root in the constructor. - Jonathan M Davis So, it's a static initialization? Documentation didn't mention it. (In class' section only 2 sentences about it and none in struct's section.) This is different from many languages (C#, Java... don't know about C and C++). What was the reason to make this initialization static? It's a consequence of the fact that every type in D has a default initializer which is known at compile time.
Re: Help with porting grammar from PEGjs to D for dustjs project!
Is there multiline comments available inside PEGGED template? As far as I understand inline comments are set via # sign. No, no multiline comment. That's based on the original PEG grammar, which allows only #-comments.
Re: Preferred program config file format and parsing library?
https://en.wikipedia.org/wiki/Marshalling_(computer_science) bla. damn it.
static array in templated struct/class
alias Vec4f = TVector!(float,4);
alias Vec3f = TVector!(float,3);
class TVector(T,int n)
{
T[n] val;
...
TVector as class does work as expected, as a struct i get the
following errors, but why?
struct Vector.TVector!(float, 4).TVector no size yet for forward
reference
struct Vector.TVector!(float, 3).TVector no size yet for forward
reference
Re: static array in templated struct/class
On Tuesday, 5 August 2014 at 18:36:35 UTC, ddos wrote:
alias Vec4f = TVector!(float,4);
alias Vec3f = TVector!(float,3);
class TVector(T,int n)
{
T[n] val;
...
TVector as class does work as expected, as a struct i get the
following errors, but why?
struct Vector.TVector!(float, 4).TVector no size yet for
forward reference
struct Vector.TVector!(float, 3).TVector no size yet for
forward reference
Can you show the complete code? I cannot reproduce this with
either latest DMD git, DMD 2.065, or LDC 0.13.0:
alias Vec4f = TVector!(float,4);
alias Vec3f = TVector!(float,3);
struct TVector(T,int n)
{
T[n] val;
}
Vec3f a;
Vec4f b;
Re: static array in templated struct/class
Am 05.08.2014 21:13, schrieb Marc Schütz schue...@gmx.net:
On Tuesday, 5 August 2014 at 18:36:35 UTC, ddos wrote:
alias Vec4f = TVector!(float,4);
alias Vec3f = TVector!(float,3);
class TVector(T,int n)
{
T[n] val;
...
TVector as class does work as expected, as a struct i get the
following errors, but why?
struct Vector.TVector!(float, 4).TVector no size yet for forward
reference
struct Vector.TVector!(float, 3).TVector no size yet for forward
reference
Can you show the complete code? I cannot reproduce this with either
latest DMD git, DMD 2.065, or LDC 0.13.0:
alias Vec4f = TVector!(float,4);
alias Vec3f = TVector!(float,3);
struct TVector(T,int n)
{
T[n] val;
}
Vec3f a;
Vec4f b;
struct vs class?
Re: static array in templated struct/class
On Tuesday, 5 August 2014 at 19:13:31 UTC, Marc Schütz wrote:
On Tuesday, 5 August 2014 at 18:36:35 UTC, ddos wrote:
alias Vec4f = TVector!(float,4);
alias Vec3f = TVector!(float,3);
class TVector(T,int n)
{
T[n] val;
...
TVector as class does work as expected, as a struct i get the
following errors, but why?
struct Vector.TVector!(float, 4).TVector no size yet for
forward reference
struct Vector.TVector!(float, 3).TVector no size yet for
forward reference
Can you show the complete code? I cannot reproduce this with
either latest DMD git, DMD 2.065, or LDC 0.13.0:
alias Vec4f = TVector!(float,4);
alias Vec3f = TVector!(float,3);
struct TVector(T,int n)
{
T[n] val;
}
Vec3f a;
Vec4f b;
http://pastebin.com/34sbffSa
thx for your help :) !
i use DMD 2.065 btw
Re: How to easily construct objects with multi-param constructors from lazy ranges?
Some range which takes an at compile time known number of elements from an input range and provides opIndex seems perfect to me, but as far as I know there's no such thing in Phobos. There is chunks: http://dlang.org/phobos/std_range.html#chunks
Re: static array in templated struct/class
http://pastebin.com/34sbffSa
Your problem comes from lengthSquared:
public auto lengthSquared = function () = val.reduce!((a,b) = a + b*b);
That's an unusual way to define a method. Any reason why you are using
a pointer to a function as a member? Do you need to be able to
redefine it at runtime?
I guess that in this case, the compiler cannot determine its return
type and/or its size?
I'd use:
public auto lengthSquared () { return val.reduce!((a,b) = a + b*b);}
Re: static array in templated struct/class
i wasn't intentionally creating a functionpointer, i just liked
the syntax x3 ... but i guess i should read into it now :)
thx for you help !
On Tuesday, 5 August 2014 at 19:51:33 UTC, Philippe Sigaud via
Digitalmars-d-learn wrote:
http://pastebin.com/34sbffSa
Your problem comes from lengthSquared:
public auto lengthSquared = function () = val.reduce!((a,b) =
a + b*b);
That's an unusual way to define a method. Any reason why you
are using
a pointer to a function as a member? Do you need to be able to
redefine it at runtime?
I guess that in this case, the compiler cannot determine its
return
type and/or its size?
I'd use:
public auto lengthSquared () { return val.reduce!((a,b) = a +
b*b);}
Inner struct accessing host member
I'd have thought that this would work:
struct A
{
int[] i;
B b;
struct B
{
void foo() { i ~= 1;}
}
}
void main()
{
A a;
a.b.foo();
}
But the compiler tells me 'need this for i of type int[]'.
Is there any way I can gain access on i inside B?
Re: Haskell calling D code through the FFI
On Monday, 4 August 2014 at 20:48:09 UTC, Jon wrote:
For reasons I don't completely understand, you also need a fake
main function, dummy.d:
void main(){}
Note that this is not necessary if you compile with -lib e.g.:
dmd -lib -oflibtest.a test.d
and then
ghc Main.hs --make -omain libtest.a
I don't have gdc or ldc installed but as far as I know ldc has a
-lib flag as well.
Re: Inner struct accessing host member
On Tuesday, 5 August 2014 at 20:32:08 UTC, Philippe Sigaud wrote:
I'd have thought that this would work:
struct A
{
int[] i;
B b;
struct B
{
void foo() { i ~= 1;}
}
}
void main()
{
A a;
a.b.foo();
}
But the compiler tells me 'need this for i of type int[]'.
Is there any way I can gain access on i inside B?
I know I've read this in TDPL, but don't recall enough.
Does this help :
http://www.digitalmars.com/d/archives/digitalmars/D/learn/Nested_struct_member_has_no_access_to_the_enclosing_class_data_38294.html
?
Re: Inner struct accessing host member
On Tue, Aug 5, 2014 at 11:37 PM, Martijn Pot via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: Does this help : http://www.digitalmars.com/d/archives/digitalmars/D/learn/Nested_struct_member_has_no_access_to_the_enclosing_class_data_38294.html Yes, that helps: that explains why it does not wor :). I changed my code to use classes. It's a bit less handy, but it works.
Re: Inner struct accessing host member
why it does not wor :). why it does not *work*, of course. Sigh.
Re: Command Line Application in D
This is exactly what I was thinking. Thanks so much for your
help!
TJB
Just a little something I made for you. Untested of course. But
takes an argument from cli, which is a glob. Foreach file under
current working directory, if its a file write out processing.
(I gave std.stdio an alias because std.file and std.stdio
conflict for some symbols)
import std.file;
import stdio = std.stdio;
void main(string[] args) {
if (args.length == 2) {
foreach(entry; dirEntries(., args[1], SpanMode.Depth)) {
if (isDir(entry.name)) {
} else if (isFile(entry.name)) {
stdio.writeln(Processing ~ entry.name);
}
}
} else {
stdio.writeln(Arguments: glob);
}
}
Re: Inner struct accessing host member
On Tuesday, 5 August 2014 at 20:32:08 UTC, Philippe Sigaud wrote:
I'd have thought that this would work:
struct A
{
int[] i;
B b;
struct B
{
void foo() { i ~= 1;}
}
}
void main()
{
A a;
a.b.foo();
}
But the compiler tells me 'need this for i of type int[]'.
Is there any way I can gain access on i inside B?
programming Q, either youra newb or not, should rather be posted
to 'http://forum.dlang.org/group/digitalmars.D.learn'. Your post
appears on 'http://forum.dlang.org/group/digitalmars.D' which is
more related to the lang. design rather to programming Q. Take
care next time bro.
Re: Haskell calling D code through the FFI
Oh great thank you. I think that might solve the majority of the
confusion I was having. One thing I can't figure out though, is
getting garbage collection to work as expected. If I have a
function that allocates a pointer to a struct using new, I get an
error on linking _dAlloc... not found. But maybe compiling as a
lib will solve this too.
On Tuesday, 5 August 2014 at 21:28:08 UTC, David Soria Parra
wrote:
On Monday, 4 August 2014 at 20:48:09 UTC, Jon wrote:
For reasons I don't completely understand, you also need a
fake main function, dummy.d:
void main(){}
Note that this is not necessary if you compile with -lib e.g.:
dmd -lib -oflibtest.a test.d
and then
ghc Main.hs --make -omain libtest.a
I don't have gdc or ldc installed but as far as I know ldc has
a -lib flag as well.
Re: Declaring run time variables
On Monday, 4 August 2014 at 22:45:15 UTC, anonymous wrote:
On Monday, 4 August 2014 at 22:18:24 UTC, splatterdash wrote:
Indeed I do. I'm not sure which type I should use for the
common base type, though. MyFileReader is a templated class,
so using it plainly did not work. I also tried
`InputRange!string` to no avail despite `MyFileReader`
implementing the three InputRange requirement (popFront(),
front, and empty).
Any ideas on what I should as the class?
Let MyFileReader implement an interface that has the operations
you need. That interface can be std.range.InputRange!string, or
you can define your own.
Note that a type is an input range when it has the input range
primitives (front, popFront, empty), but it's only a
std.range.InputRange!T when it implements the interface in the
OOP sense: class C : InputRange!E {...}.
Phobos generally doesn't use InputRange, but templatizes
everything. You can go that way, too, and move the foreach loop
to a templated function:
void main()
{
File f = File(input_file)
// detect gzip ...
if (isGzip)
doThings(new MyFileReader!GzipIterator(f));
else
doThings(new MyFileReader!NormalIterator(f));
}
void doThings(I)(I fileIter)
{
foreach(string line; fileIter) {
// do things
}
}
That does it, thanks :)!
Re: Haskell calling D code through the FFI
So that does indeed solve some of the problems. However, using
this method, when linking I get two errors, undefined reference
rt_init() and rt_term() I had just put these methods in the
header file. If I put wrappers around these functions and export
I get the rt_init, rt_term is private.
On Tuesday, 5 August 2014 at 21:28:08 UTC, David Soria Parra
wrote:
On Monday, 4 August 2014 at 20:48:09 UTC, Jon wrote:
For reasons I don't completely understand, you also need a
fake main function, dummy.d:
void main(){}
Note that this is not necessary if you compile with -lib e.g.:
dmd -lib -oflibtest.a test.d
and then
ghc Main.hs --make -omain libtest.a
I don't have gdc or ldc installed but as far as I know ldc has
a -lib flag as well.
Best practices for testing functions that opens files
Hi all, Is there a recommended way to test functions that opens and iterates over files? The unittest block seems more suited for testing functions whose input and output can be defined in the program itself. I'm wondering if there is a better way to test functions that open files with specific formats. Thanks before :).
Re: Inner struct accessing host member
On Tuesday, 5 August 2014 at 20:32:08 UTC, Philippe Sigaud wrote:
But the compiler tells me 'need this for i of type int[]'.
Is there any way I can gain access on i inside B?
Been thinking about this a bit. I know some of my relies are in
the 2012 fourm posts regarding it, but access permissions seems
like the biggest reason, or rather lack of control of them.
So take your example:
struct A
{
int[] i;
B b;
}
Now let's make a couple instances of it; And assume it would
work...
A a;
immutable A i_a;
a.b.foo(); //fine
i_a.b.foo(); //won't run, due to not being const/immutable
So, a user decides let's copy the inner struct. If the struct
copies it's attached secondary pointer going to it's outer/host,
then:
A.B b = a.b;
A.B i_b = i_a.b;
A.B broken_b = cast(A.B) i_a.b;
b.foo(); //attached to a still, works...
i_b.foo(); //const or immutable, won't work.
broken_b.foo(); //i_a is accessible invisibly because overridden
or transformed assuming it would be converted or copied/moved as
appropriate.
return b; //if a is a local variable then b becomes invalid even
though it's a struct.
return i_b; //same as return b
return broken_b; //same as above two cases.
inner structs in a function where the struct is never passed
outside the function would probably work though...
void func() {
int[] i;
struct B {
void foo() { i ~= 1;}
}
B b;
b.foo(); //passed a reference to the current frame along with
it's local 'this', but since it never leaves the function it's
safe.
}
Now a current way to make it safe while still leaving it structs
could be passing a reference to either the outer struct or the
variable in question. For simplicity it would probably be the
struct.
struct A
{
int[] i;
B b;
struct B
{
void foo(ref A outer) { outer.i ~= 1;}
}
void bar() //call B foo
{
b.foo(this);
}
}
Or less safe is to use a pointer and assign it when b
instantiates to point back to A.. But if you pass B around
without A and A goes out of scope... same problem...
Maybe i'm over-thinking it.
Re: Inner struct accessing host member
On 08/05/14 22:32, Philippe Sigaud via Digitalmars-d-learn wrote:
I'd have thought that this would work:
struct A
{
int[] i;
B b;
struct B
{
void foo() { i ~= 1;}
}
}
void main()
{
A a;
a.b.foo();
}
But the compiler tells me 'need this for i of type int[]'.
Is there any way I can gain access on i inside B?
Not directly, but as you ask for /any/ way -- yes:
struct B
{
void foo() { outer.i ~= 1; }
ref A outer() inout @property { return
*cast(A*)(cast(void*)this-A.b.offsetof); }
}
Note this will work only as long as you have just one B
instance in A and B is never created or copied outside of A.
artur
Re: Haskell calling D code through the FFI
On Tuesday, 5 August 2014 at 23:23:43 UTC, Jon wrote: So that does indeed solve some of the problems. However, using this method, when linking I get two errors, undefined reference rt_init() and rt_term() I had just put these methods in the header file. If I put wrappers around these functions and export I get the rt_init, rt_term is private. It works for me, here are the main parts of my Makefile: DC = ~/bin/dmd main: Main.hs FunctionsInD.a ghc -o main Main.hs FunctionsInD.a ~/lib/libphobos2.a -lpthread FunctionsInD.a: FunctionsInD.d $(DC) -c -lib FunctionsInD.d I passed in the phobos object directly because I don't know how to specify the ~/lib directory on the ghc command line.
Re: Dub failing to detect Shared Libraries
On 8/6/2014 2:53 AM, Rishub Nagpal wrote:
I am porting DerelictBGFX to linux, but I am having some problems. When
I run the dub command in my example directory, I get the following error :
derelict.util.exception.SharedLibLoadException@../../../.dub/packages/derelict-util-1.0.2/source/derelict/util/exception.d(35):
Failed to load one or more shared libraries:
libbgfx-shared-libRelease.so - libbgfx-shared-libRelease.so: cannot
open shared object file: No such file or directory
libbgfx-shared-libDebug.so - libbgfx-shared-libDebug.so: cannot
open shared object file: No such file or directory
Here is the file I edited to detect those libaries :
https://github.com/shrub77/DerelictBgfx/blob/master/source/derelict/bgfx/bgfx.d#L55
Here is the dub.json :
{
name: 00-helloworld,
sourcePaths: [.],
targetType: executable,
mainSourceFile: helloworld.d,
dependencies:
{
gfm:sdl2: =1.1.4,
derelict-bgfx: {path: ../../, version: ~master}
}
}
Where should I put the *.so files so they can be detected properly by dub?
Rishub
This has nothing to do with dub. You need to install the shared
libraries manually so that Derelict can pick them up at run time. They
need to be on the global library search path, whatever that may be for
your system.
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is active.
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Re: unittest affects next unittest
On Tuesday, 5 August 2014 at 17:41:06 UTC, Marc Schütz wrote: On Tuesday, 5 August 2014 at 15:39:55 UTC, sigod wrote: On Saturday, 2 August 2014 at 06:46:04 UTC, Jonathan M Davis via Digitalmars-d-learn wrote: On Fri, 01 Aug 2014 23:09:37 + sigod via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: Code: http://dpaste.dzfl.pl/51bd62138854 (It was reduced by DustMite.) Have I missed something about structs? Or this simply a bug? Don't do this with a member variable: private Node * _root = new Node(); Directly initializing it like that sets the init value for that struct, and that means that every struct of that type will have exactly the same value for _root, so they will all share the same root rather than having different copies. You need to initialize _root in the constructor. - Jonathan M Davis So, it's a static initialization? Documentation didn't mention it. (In class' section only 2 sentences about it and none in struct's section.) This is different from many languages (C#, Java... don't know about C and C++). What was the reason to make this initialization static? It's a consequence of the fact that every type in D has a default initializer which is known at compile time. That and it solves a lot of problems with undefined behavior (this is particularly true when talking about module-level variables). static initialization ordering problems are hell in other languages (especially in C++). By making it so that all direct initializations of variables other than local variables are done statically, all kinds of nasty, subtle bugs go away. The one nasty, subtle issue that it causes that I'm aware of is that if you directly initialize any member variables which are reference types, then all instances of that type end up referring to the same object - and that's what you ran into. But fortunately, that's easy to fix, whereas the static initialization problems that were fixed by making all of those variables have to be initialized at compile time are much harder to fix. - Jonathan M Davis
Re: unittest affects next unittest
On Tuesday, 5 August 2014 at 17:41:06 UTC, Marc Schütz wrote: It's a consequence of the fact that every type in D has a default initializer which is known at compile time. Then doesn't this mean it should pop out a warning in case that's the behavior you wanted, perhaps a reference to the D specs? Beyond that it would be easy to forget it does that, since class initializes things different than structs because of the 'known at compile time' logic.
Re: Best practices for testing functions that opens files
On Tuesday, 5 August 2014 at 23:22:24 UTC, splatterdash wrote: Hi all, Is there a recommended way to test functions that opens and iterates over files? The unittest block seems more suited for testing functions whose input and output can be defined in the program itself. I'm wondering if there is a better way to test functions that open files with specific formats. Thanks before :). The concern would be more on functions that delete files. Yesterday I've made a programming error which resulted into the deletion if the source files of another project. Fortunately the other project was git-i-fyed and I just had to stash/pull to recover my files. Take care. Opening files with wrong args can overwrite, delete the curent one. Maybe make a sandbox environment (clean brand new account).
Re: Member access of __gshared global object
On Thursday, 31 July 2014 at 10:22:28 UTC, Marc Schütz wrote: On Thursday, 31 July 2014 at 02:03:37 UTC, Puming wrote: 1. Are AAs reference type? if so, why does the compiler copy it? This is probably your problem. They are reference types, but initially that reference is `null`. When you write: auto cmds = CONFIG.commands; `cmds` contains a copy of the `null` value. On assignment, the actual AA is created, and assigned to `cmds`, but not back to `CONFIG.commands`. Try initializing the AA in your class constructor. I checked the code and could concur your suggestion. What I found strange were: 1. The only way that I can initialize it is to assign a value. But I want to initialize an empty AA, is that possible? 2. CONFIG.commands is not `null` before initialized, it is '[]'(when I writeln it). But it still behave like what you described (except that it won't produce an NullPointer Exception.
HTP Handler
Hi , I am new to D, I would like to build HTTP Server in D. Can any one throw some light on what are all the libraries available in D and if there is any example it would be helpful. Thanks Hussain
Re: HTP Handler
On Wed, Aug 06, 2014 at 04:10:27AM +, HUSSAIN via Digitalmars-d-learn wrote: Hi , I am new to D, I would like to build HTTP Server in D. Can any one throw some light on what are all the libraries available in D and if there is any example it would be helpful. [...] http://vibed.org/ T -- This sentence is false.
Re: HTP Handler
See this list: https://github.com/zhaopuming/awesome-d#web-frameworks On Wednesday, 6 August 2014 at 04:10:28 UTC, HUSSAIN wrote: Hi , I am new to D, I would like to build HTTP Server in D. Can any one throw some light on what are all the libraries available in D and if there is any example it would be helpful. Thanks Hussain
Re: Inner struct accessing host member
On Tuesday, 5 August 2014 at 22:14:23 UTC, abanstadya wrote: programming Q, either youra newb or not, should rather be posted to 'http://forum.dlang.org/group/digitalmars.D.learn'. Your post appears on 'http://forum.dlang.org/group/digitalmars.D' which is more related to the lang. design rather to programming Q. Take care next time bro. This *is* D.learn, bro.
Re: Inner struct accessing host member
On Tuesday, 5 August 2014 at 23:47:00 UTC, Artur Skawina via
Digitalmars-d-learn wrote:
Is there any way I can gain access on i inside B?
Not directly, but as you ask for /any/ way -- yes:
struct B
{
void foo() { outer.i ~= 1; }
ref A outer() inout @property { return
*cast(A*)(cast(void*)this-A.b.offsetof); }
}
Note this will work only as long as you have just one B
instance in A and B is never created or copied outside of A.
OK. I have en entire graph, whose nodes are Bs inside A. So that
might not be totally appropriate for me. Thanks anyway, I always
forget about offsetof
Re: Inner struct accessing host member
Era: broken_b.foo(); //i_a is accessible invisibly because overridden or transformed assuming it would be converted or copied/moved as appropriate. return b; //if a is a local variable then b becomes invalid even though it's a struct. return i_b; //same as return b return broken_b; //same as above two cases. I see. I didn't know one could create an A.B 'outside'. I saw inner types as Voldemort types, but that is true only for inner structs in functions. Now a current way to make it safe while still leaving it structs could be passing a reference to either the outer struct or the variable in question. For simplicity it would probably be the struct. (...) Or less safe is to use a pointer and assign it when b instantiates to point back to A.. But if you pass B around without A and A goes out of scope... same problem... Maybe i'm over-thinking it. I already tried to propagate a ref through A's methods, but that made a mess: I have lots of methods, which have all to transmit this ref, only for *one* of them being able to update it. Thanks for you explanations :) I'm now using classes and inner classes. I'm not fond of classes, but that's working correctly.
