date:20110613

I'm in the process of porting WinAPI examples from Petzold's Windows
Programming book to D. In the book there's a chapter on
multithreading. It covers thread creation, messaging queues, critical
sections, TLS (heh..), and event signaling.

Since we pretty much have all of this in D already (+ its
multiplatform), I'm thinking it might be a good idea to skip
translating this chapter's samples. I don't want to encourage newbies
to use WinAPI threading functions when it's completely unnecessary to
do so.

I *could* however demonstrate how it's done in D instead, and put some
documentation in the modules on how it works. So while it won't follow
what the book says, at least it's there instead of being completely
left out.

Whaddya think, Windoze users?

Re: Is it reasonable to learn D

2011-06-13 Thread Jose Armando Garcia

On Mon, Jun 13, 2011 at 6:33 AM, Lloyd Dupont  wrote:
> Let's learn together then! :P
> http://galador.net/codeblog/?tag=/D
>
> While my blog post are only about setting up the environment so far.. I have
> delved in the code for 2 weeks now! (Although I had some day off (work and
> programing) in Darwin) I'm right into it now, should have a new blog post
> soon! About programing this time!
>
> My verdict: it's frustrating yes. But D has a couple of advantages and 2
> that you might like:
> - D has event / delegate, just like C# (and unlike C++, or maybe C++ has
> them, (it has method pointer, right!?) but it's not taken advantage of!)
> - the above point is probably what makes the C++ GUI so... difficult.
> Whereas I found a GUI API for D just like WinForm! (DGui!)
>

Boost, GTK+ and QT have signals. E.g.
http://www.boost.org/doc/libs/1_46_1/doc/html/signals.html

Re: Is there any convenient CopyMemory function in Phobos?

On 2011-06-13 17:38, Andrej Mitrovic wrote:
> So why's it in core.stdc.string, instead of say.. core.memory?
> 
> Btw, I've had some imports already in the module and it seems these
> two conflict:
> 
> import core.thread;
> import core.stdc.string;
> 
> void main()
> {
> int* p, x;
> memcpy(p, x, 1);
> }
> 
> test.d(9): Error: core.stdc.string.memcpy at
> D:\DMD\dmd2\windows\bin\..\..\src\druntime\import\core\stdc\string.di(11)
> conflicts with core.thread.memcpy at
> D:\DMD\dmd2\windows\bin\..\..\src\druntime\import\core\thread.di(37)

core.thread has its own private declaration of memcpy (IIRC, they don't match 
for some reason). Why a private declaration conflicts, I don't know. That 
certainly _sounds_ like a bug. Regardless, I have no clue why those 
declarations are where they are. I would have expected something like 
core.memory, but they seem to be strewn about druntime. That should probably 
be improved. I just grepped druntime to find where memcpy's declaration was. I 
don't know why it is where it is.

- Jonathan M Davis

Re: Is there any convenient CopyMemory function in Phobos?

Andrej Mitrovic:

> Right, haven't thought about the C functions at all (silly me).
> Thanks, this did the trick:
> extern (C) void* memcpy(void*, const void*, size_t);

Maybe you are able to wrap that memcpy in a templated D function (named 
copyMemory) that does what you want in a bit safer way, that contains some 
static and runtime asserts, etc.

Bye,
bearophile

Re: Undefined function, even though imported

Trass3r Wrote:

> > Shouldn't the linker/compiler be able to solve this on its own then?
> 
> Use rdmd or xfBuild to automatically compile all needed modules.

Everyone we'll keep asking that question forever until the D compiler does this 
by itself :-)

Bye,
bearophile

Re: Undefined function, even though imported


Thanks for all the answers! Seems like rdmd did the trick.
I don't see why this isn't built in to dmd though, or does it cause
overhead when you are using rdmd? Benefits, Drawbacks?

I've also stumbled upon an additional error with the win32 DirectX
bindings, but this seems D related actually. When I compile any code
at all (with rdmd) which imports win32.directx.d3d9 and uses the
function Direct3DCreate9, the linker issues this warning:

Error 42: Symbol Undefined _Direct3DCreate9@4

It is shown even though I'm using rdmd and I have linked to d3d9.lib
(other functions like CreateDevice and Present still works though).
To solve this error, I did some searching and it seems like I'm not
the first one with this problem. I got 2 hits:

http://www.digitalmars.com/d/archives/digitalmars/D/learn/1475.html
http://www.dsource.org/forums/viewtopic.php?p=13971&sid=d43d05620f0c3a30758a326394ac2e26

Both of these links says that the problem is solved by adding
_Direct3DCreate9 to imports. I've tried to do this by linking to a
.def file with this content (without success, same error is still
issued).

EXETYPE NT
SUBSYSTEM WINDOWS

IMPORTS
_Direct3DCreate9@4=d3d9.Direct3DCreate9

I also tried this code but pragma build_def seems deprecated:

pragma(build_def, "IMPORTS");
pragma(build_def, "_Direct3DCreate9@4=d3d9.Direct3DCreate9");

So am I doing something wrong with the def file or am I perhaps
supposed to use another pragma?

Thanks in advance!

Re: Is there any convenient CopyMemory function in Phobos?

So why's it in core.stdc.string, instead of say.. core.memory?

Btw, I've had some imports already in the module and it seems these
two conflict:

import core.thread;
import core.stdc.string;

void main()
{
int* p, x;
memcpy(p, x, 1);
}

test.d(9): Error: core.stdc.string.memcpy at
D:\DMD\dmd2\windows\bin\..\..\src\druntime\import\core\stdc\string.di(11)
conflicts with core.thread.memcpy at
D:\DMD\dmd2\windows\bin\..\..\src\druntime\import\core\thread.di(37)

Re: Is there any convenient CopyMemory function in Phobos?

On 2011-06-13 17:01, Andrej Mitrovic wrote:
> Right, haven't thought about the C functions at all (silly me).
> Thanks, this did the trick:
> extern (C) void* memcpy(void*, const void*, size_t);

core.stdc.string has memcpy's declaration in it. You should be able to just 
import it rather than declaring memcpy yourself.

- Jonathan M Davis

Re: Is there any convenient CopyMemory function in Phobos?

Right, haven't thought about the C functions at all (silly me).
Thanks, this did the trick:
extern (C) void* memcpy(void*, const void*, size_t);

Re: Is there any convenient CopyMemory function in Phobos?

On 2011-06-13 16:27, Andrej Mitrovic wrote:
> Apparently in the Windows API there's a whole lot of byte-copying going
> around.
> 
> Here's an example:
> 
> int CALLBACK EnhMetaFileProc (HDC hdc, HANDLETABLE * pHandleTable,
> CONST ENHMETARECORD * pEmfRecord,
> int iHandles, LPARAM pData)
> {
> ENHMETARECORD * pEmfr ;
> 
> pEmfr = (ENHMETARECORD *) malloc (pEmfRecord->nSize) ;
> 
> CopyMemory (pEmfr, pEmfRecord, pEmfRecord->nSize) ;
> 
> if (pEmfr->iType == EMR_RECTANGLE)
> pEmfr->iType = EMR_ELLIPSE ;
> 
> PlayEnhMetaFileRecord (hdc, pHandleTable, pEmfr, iHandles) ;
> 
> free (pEmfr) ;
> 
> return TRUE ;
> }
> 
> The nSize field specifies the byte size of the structure pointed to by
> pEmfRecord. The reason copying is required is because of this code:
> if (pEmfr->iType == EMR_RECTANGLE)
> pEmfr->iType = EMR_ELLIPSE ;
> 
> pEmfRecord itself is const, so new memory has to be allocated first
> and then the memory from pEmfRecord is copied there, and then the
> iType field is changed. A simple pointer dereference won't copy all
> the bytes, since this is one of those variable-length structure types
> you often see in C code.
> 
> In D I've used the slice trick to assign a byte range of data from one
> memory location to another:
> extern (Windows)
> int EnhMetaFileProc(HDC hdc, HANDLETABLE* pHandleTable,
> const ENHMETARECORD* pEmfRecord,
> int iHandles, LPARAM pData)
> {
> ENHMETARECORD* pEmfr;
> immutable newlength = pEmfRecord.nSize;
> 
> pEmfr = cast(ENHMETARECORD*)GC.malloc(newlength);
> 
> (cast(ubyte*)pEmfr)[0..newlength] =
> (cast(ubyte*)pEmfRecord)[0..newlength];
> 
> if (pEmfr.iType == EMR_RECTANGLE)
> pEmfr.iType = EMR_ELLIPSE;
> 
> PlayEnhMetaFileRecord(hdc, pHandleTable, pEmfr, iHandles);
> 
> GC.free(pEmfr);
> return TRUE;
> }
> 
> That's quite ugly.. Is there a Phobos/Druntime and maybe
> platform-independent function that can do byte-memory copies in a
> simple way? Something like this is what I need:
> CopyBytes(dest, src, bytecount);
> 
> Btw, CopyMemory is a WinAPI specific function, but I can't even link
> to it (it's actually an alias to RtlCopyMemory, but it's not in
> kernel32.lib for some reason even though MSDN says it is).

mempcy? The C memory functions are all available in D.

- Jonathan M Davis

Is there any convenient CopyMemory function in Phobos?

Apparently in the Windows API there's a whole lot of byte-copying going around.

Here's an example:

int CALLBACK EnhMetaFileProc (HDC hdc, HANDLETABLE * pHandleTable,
  CONST ENHMETARECORD * pEmfRecord,
  int iHandles, LPARAM pData)
{
 ENHMETARECORD * pEmfr ;

 pEmfr = (ENHMETARECORD *) malloc (pEmfRecord->nSize) ;

 CopyMemory (pEmfr, pEmfRecord, pEmfRecord->nSize) ;

 if (pEmfr->iType == EMR_RECTANGLE)
  pEmfr->iType = EMR_ELLIPSE ;

 PlayEnhMetaFileRecord (hdc, pHandleTable, pEmfr, iHandles) ;

 free (pEmfr) ;

 return TRUE ;
}

The nSize field specifies the byte size of the structure pointed to by
pEmfRecord. The reason copying is required is because of this code:
 if (pEmfr->iType == EMR_RECTANGLE)
  pEmfr->iType = EMR_ELLIPSE ;

pEmfRecord itself is const, so new memory has to be allocated first
and then the memory from pEmfRecord is copied there, and then the
iType field is changed. A simple pointer dereference won't copy all
the bytes, since this is one of those variable-length structure types
you often see in C code.

In D I've used the slice trick to assign a byte range of data from one
memory location to another:
extern (Windows)
int EnhMetaFileProc(HDC hdc, HANDLETABLE* pHandleTable,
const ENHMETARECORD* pEmfRecord,
int iHandles, LPARAM pData)
{
ENHMETARECORD* pEmfr;
immutable newlength = pEmfRecord.nSize;

pEmfr = cast(ENHMETARECORD*)GC.malloc(newlength);

(cast(ubyte*)pEmfr)[0..newlength] = (cast(ubyte*)pEmfRecord)[0..newlength];

if (pEmfr.iType == EMR_RECTANGLE)
pEmfr.iType = EMR_ELLIPSE;

PlayEnhMetaFileRecord(hdc, pHandleTable, pEmfr, iHandles);

GC.free(pEmfr);
return TRUE;
}

That's quite ugly.. Is there a Phobos/Druntime and maybe
platform-independent function that can do byte-memory copies in a
simple way? Something like this is what I need:
CopyBytes(dest, src, bytecount);

Btw, CopyMemory is a WinAPI specific function, but I can't even link
to it (it's actually an alias to RtlCopyMemory, but it's not in
kernel32.lib for some reason even though MSDN says it is).

Re: So how exactly does one make a persistent range object?

2011-06-13 Thread Ali Çehreli

On Sat, 04 Jun 2011 20:27:16 +0200, Andrej Mitrovic wrote:

> This is my #1 problem with ranges right now:
> 
> import std.range;
> 
> int[3] a = [1, 2, 3];
> shared range = cycle(a[]);  // nope
> 
> void main()
> {
> foo();
> }
> 
> void foo()
> {
> // do something with range
> }
> 
> test.d(6): Error: static variable a cannot be read at compile time
> test.d(6): Error: cannot evaluate cycle(a[]) at compile time

Has this been answered? The problem is with 'a'. Defining it as enum 
fixes that problem:

import std.stdio;
import std.range;

enum a = [1, 2, 3];
auto range = cycle(a[]);

void main()
{
foreach (i; 0 .. 2) {
foo();
}
}

void foo()
{
foreach(i; 0 .. 5) {
writeln(range.front);
range.popFront();
}
}

Ali

Re: Undefined function, even though imported

2011-06-13 Thread Trass3r


Shouldn't the linker/compiler be able to solve this on its own then?


Use rdmd or xfBuild to automatically compile all needed modules.

Re: Undefined function, even though imported

sc.ini is going to get overwritten when you upgrade DMD so changing it
is a bad idea. An alternative is to copy sc.ini to your projects local
directory, this way DMD will use that one instead of its own. But this
is all working around the issue that you should be passing import
directories via a build script, makefile, or some type of build system
(that's a bit difficult given the current state of build tools..), and
not hardcoding paths to a global config file.

Btw, there are some notes on how to use DMD/Optlink and static libs here:
http://prowiki.org/wiki4d/wiki.cgi?D__Tutorial/CompilingLinkingD

I can't tell if it's any good until someone bothers to try things out
and see if things work like the page describes. If something's wrong
or that page doesn't explain what you need to know, let me know and
I'll try to update it with more information.

Re: Undefined function, even though imported


On 2011-06-13 23:51, Jonathan M Davis wrote:

On 2011-06-13 14:44, Loopback wrote:

Thanks for your answer!

Seems like supplying with the file location solved the problem, though I
still wonder about one thing. The imported module is located in
"c:/d/dmd2/import/win32/windef.d" and I have used this command line to
the DMD compiler: -I"c:/d/dmd2/import/". Shouldn't the linker/compiler
be able to solve this on its own then?


-I just tells it where to look for imports, not what to link. The linker never
links in anything unless you explicitly tell it to - either by having it
directly on the command line or in DFLAGS (usually set by dmd.conf on Linux
and sc.ini or Windows). Phobos is listed in dmd.conf/sc.ini, which is why it
gets linked in. If it wasn't there, you'd have to list it explicitly too.

- Jonathan M Davis

Can you modify the sc.ini so the linker automatically checks a specific
directory for imports? Let's say for example this I have my imports in
c:/d/dmd2/import/, can I implement this in sc.ini so I don't have to
worry about these specific linker errors again?

I tried adding "-I%@P%\..\..\import" (custom import directory) in sc.ini
without success.

Another question I'm wondering is; if I include a module and tell its
location explicitly to the linker, do I then also have to tell the
linker the location of all local imports this file have as well?

Running DMD tests

2011-06-13 Thread Peter Alexander


I'm trying to run the test suite for DMD, but I'm running into issues.

I've cloned dmd from github, and successfully built dmd, but when I run 
'make' from the dmd/test dir, I get:


  $ make
  Creating output directory: test_results
  Building d_do_test tool
  object.d: Error: module object is in file 'object.d' which cannot
  be read
  Specify path to file 'object.d' with -I switch
  make: *** [test_results/d_do_test] Error 1

Do I need to set up my environment differently to run dmd in 
development? How can I get around this?


Note: I'm running OSX 10.6.7

Thanks

Re: Undefined function, even though imported

On 2011-06-13 14:44, Loopback wrote:
> Thanks for your answer!
> 
> Seems like supplying with the file location solved the problem, though I
> still wonder about one thing. The imported module is located in
> "c:/d/dmd2/import/win32/windef.d" and I have used this command line to
> the DMD compiler: -I"c:/d/dmd2/import/". Shouldn't the linker/compiler
> be able to solve this on its own then?

-I just tells it where to look for imports, not what to link. The linker never 
links in anything unless you explicitly tell it to - either by having it 
directly on the command line or in DFLAGS (usually set by dmd.conf on Linux 
and sc.ini or Windows). Phobos is listed in dmd.conf/sc.ini, which is why it 
gets linked in. If it wasn't there, you'd have to list it explicitly too.

- Jonathan M Davis

Re: Undefined function, even though imported


Thanks for your answer!

Seems like supplying with the file location solved the problem, though I 
still wonder about one thing. The imported module is located in 
"c:/d/dmd2/import/win32/windef.d" and I have used this command line to 
the DMD compiler: -I"c:/d/dmd2/import/". Shouldn't the linker/compiler 
be able to solve this on its own then?

Re: Undefined function, even though imported

On 2011-06-13 14:18, Loopback wrote:
> Hi!
> 
> Let me begin by saying, I'm sorry if this is caused of some obvious
> error but since I am new to D, I am not aware of all the tricks and
> treats it offers.
> 
> I am working with the WindowsAPI binding at dsource.org (though I do not
> believe this is related to the binding itself). However, in my code I
> call the function LOWORD (win32 specific). This function is defined in
> the win32.windef module. Although it is defined there (without any
> encapsulations in version statements or anything similar) I receive this
> error:
> 
> Error 42: Symbol Undefined _D5win326windef6LOWORDFkZt (LOWORD undefined)
> 
> To solve this I had to copy-paste the exact function directly into my
> own file/module instead. So my question is the following; why do I have
> to copy and paste the function directly in my code when it is clearly
> defined in one of the files I import?
> 
> Windef.d attached

Importing the module with the function in it means that the compilation of the 
current module can see that module and use its symbols. But the compiled 
functions in the imported module are in the object file generated when 
compiling that module, not the current module. In the case of binding to a C 
function, you're telling D that a function with that signature exists, but it 
doesn't have the source to it. In either case, the actual function definition 
is going to be needed when linking (at least with static linking - it's a bit 
more complicated with dynamic linking, but on Windows at least, the .lib file 
still needs to be linked in). In this particular case, one of two things is 
likely happening.

1. You never linked in the lib file for the library with the function.

2. The declaration given for the C function in question isn't using the right 
linking. That is, it needs to be extern(C) and/or extern(Windows) (I'm not 
quite sure what extern(Windows) does differently than extern(C), but I gather 
that it's necessary at least some of the time when dealing with Windows system 
functions).

The symbol that it's complaining about looks rather mangled to me (though I 
don't look at pure C function symbols very often, so I don't know exactly what 
they look like unmangled - both C++ and D mangle functions to allow for 
function overloading). So, it's likely that the function's declaration in D 
isn't properly marked with extern(C) or extern(Windows). So, the function's 
name gets mangled, and it can't find the unmangled C function in the .lib 
file.

Regardless, that particular error indicates that the linker failed to locate 
that particular function, and you have to make whatever changes are necessary 
- either in code or in your compilation process - to make it so that the 
linker is able to find the definition of the function in question.

- Jonathan M Davis

Re: Clear big AAs

useo:

> toRender is my AA which contains the textures as key (instances of my
> class "Texture") and the tiles (position of them) as values. When I
> remove the first two lines (clear and set null) it doesn't drops down
> to 1 FPS, it runs normal.
> 
> I hope anyone know a solution :)

Try to disable the GC before that double loop and enable after it. Generally 
those appends create lot of garbage, so it's not something to do in a 
performance critical part of the program (try to use fixed-sized arrays, or 
structs with a fixed-sized array plus a length). You can also try an AA of 
appender. Also try to profile your code, and take a look at GC stats.

Bye,
bearophile

Re: Undefined function, even though imported

2011-06-13 Thread Trass3r

Importing it means dmd knows about the function and emits a call but  
doesn't automatically generate the function code.

This is only done if you also pass the file containing it to dmd.

Re: Undefined function, even though imported

2011-06-13 Thread Mafi


Am 13.06.2011 23:18, schrieb Loopback:

Hi!

Let me begin by saying, I'm sorry if this is caused of some obvious
error but since I am new to D, I am not aware of all the tricks and
treats it offers.

I am working with the WindowsAPI binding at dsource.org (though I do not
believe this is related to the binding itself). However, in my code I
call the function LOWORD (win32 specific). This function is defined in
the win32.windef module. Although it is defined there (without any
encapsulations in version statements or anything similar) I receive this
error:

Error 42: Symbol Undefined _D5win326windef6LOWORDFkZt (LOWORD undefined)

To solve this I had to copy-paste the exact function directly into my
own file/module instead. So my question is the following; why do I have
to copy and paste the function directly in my code when it is clearly
defined in one of the files I import?

Windef.d attached


Your error is an linker error.  This means the last step of creating an 
exceutable couldn't be taken: finding all names you promised to be there.
When you, import a module, you promise: "Compiler, I know that 
definitions I'm using in this module aren't declared in there, but look 
at this module. I promise that all these functions in there will be 
there during the linking process". The compiler gives no error because 
you promised, but now the linker has problem: It hasn't got the 
defintions you said to be there. You have to say the linker where to 
find them.

One way is to give your .d/.lib file to dmd so he can give it to the linker:
dmd main.d path/to/windef.d

Mafi

Undefined function, even though imported


Hi!

Let me begin by saying, I'm sorry if this is caused of some obvious 
error but since I am new to D, I am not aware of all the tricks and 
treats it offers.


I am working with the WindowsAPI binding at dsource.org (though I do not 
believe this is related to the binding itself). However, in my code I 
call the function LOWORD (win32 specific). This function is defined in 
the win32.windef module. Although it is defined there (without any 
encapsulations in version statements or anything similar) I receive this 
error:


Error 42: Symbol Undefined _D5win326windef6LOWORDFkZt (LOWORD undefined)

To solve this I had to copy-paste the exact function directly into my 
own file/module instead. So my question is the following; why do I have 
to copy and paste the function directly in my code when it is clearly 
defined in one of the files I import?


Windef.d attached
/***\
*windef.d   *
*   *
*   Windows API header module   *
*   *
* Translated from MinGW Windows headers *
*   by Stewart Gordon   *
*   *
*   Placed into public domain   *
\***/
module win32.windef;

public import win32.winnt;
private import win32.w32api;

const size_t MAX_PATH = 260;

ushort MAKEWORD(ubyte a, ubyte b) {
return cast(ushort) ((b << 8) | a);
}

uint MAKELONG(ushort a, ushort b) {
return cast(uint) ((b << 16) | a);
}

ushort LOWORD(uint l) {
return cast(ushort) l;
}

ushort HIWORD(uint l) {
return cast(ushort) (l >>> 16);
}

ubyte LOBYTE(ushort w) {
return cast(ubyte) w;
}

ubyte HIBYTE(ushort w) {
return cast(ubyte) (w >>> 8);
}

template max(T) {
T max(T a, T b) {
return a > b ? a : b;
}
}

template min(T) {
T min(T a, T b) {
return a < b ? a : b;
}
}

const void* NULL = null;
alias ubyte   BYTE;
alias ubyte*  PBYTE, LPBYTE;
alias ushort  USHORT, WORD, ATOM;
alias ushort* PUSHORT, PWORD, LPWORD;
alias uintULONG, DWORD, UINT, COLORREF;
alias uint*   PULONG, PDWORD, LPDWORD, PUINT, LPUINT;
alias int WINBOOL, BOOL, INT, LONG, HFILE, HRESULT;
alias int*PWINBOOL, LPWINBOOL, PBOOL, LPBOOL, PINT, LPINT, LPLONG;
alias float   FLOAT;
alias float*  PFLOAT;
alias CPtr!(void) PCVOID, LPCVOID;

alias UINT_PTR WPARAM;
alias LONG_PTR LPARAM, LRESULT;

alias HANDLE HGLOBAL, HLOCAL, GLOBALHANDLE, LOCALHANDLE, HGDIOBJ, HACCEL,
  HBITMAP, HBRUSH, HCOLORSPACE, HDC, HGLRC, HDESK, HENHMETAFILE, HFONT,
  HICON, HINSTANCE, HKEY, HMENU, HMETAFILE, HMODULE, HMONITOR, HPALETTE, HPEN,
  HRGN, HRSRC, HSTR, HTASK, HWND, HWINSTA, HKL, HCURSOR;
alias HANDLE* PHKEY;

static if (WINVER >= 0x500) {
alias HANDLE HTERMINAL, HWINEVENTHOOK;
}

alias extern (Windows) int function() FARPROC, NEARPROC, PROC;

struct RECT {
LONG left;
LONG top;
LONG right;
LONG bottom;
}
alias RECT RECTL;
alias RECT*   PRECT, LPRECT, PRECTL, LPRECTL;
alias CPtr!(RECT) LPCRECT, LPCRECTL;

struct POINT {
LONG x;
LONG y;
}
alias POINT POINTL;
alias POINT* PPOINT, LPPOINT, PPOINTL, LPPOINTL;

struct SIZE {
LONG cx;
LONG cy;
}
alias SIZE SIZEL;
alias SIZE* PSIZE, LPSIZE, PSIZEL, LPSIZEL;

struct POINTS {
SHORT x;
SHORT y;
}
alias POINTS* PPOINTS, LPPOINTS;

enum : BOOL {
FALSE = 0,
TRUE  = 1
}

Re: WindowsAPI Binding - Linker Errors

2011-06-13 Thread Nick Sabalausky

"Nick Sabalausky"  wrote in message 
news:it5ui1$1l75$1...@digitalmars.com...
> "Loopback"  wrote in message 
> news:it4ud4$1kf5$1...@digitalmars.com...
>> Hello!
>>
>> I've been test programming win32 applications recently, and since the 
>> phobos win32 library is so limited, I decided to download and test the 
>> WindowsAPI Binding 
>> (http://www.dsource.org/projects/bindings/wiki/WindowsApi). Using the 
>> latest snapshot (as of this writing) I receive the following linker 
>> errors when I compile:
>>
>> Error 42: Symbol Undefined _D5win328winerror12MAKE_HRESULTFbkkZi
>> (MAKE_HRESULT is undefined).
>>
>> These are my imports: win32.mmsystem, win32.windef, win32.winuser, 
>> win32.wingdi and win32.directx.d3d9.
>>
>> The problem lies within the DirectX module. If I do not import it, there 
>> are no errors. I've taken the d3d9.lib and d3dx9.lib from the DirectX SDK 
>> and used coffimplib and the linked to them, without success.
>>
>> These are the libraries I am linking to: gdi32.lib, winmm.lib and 
>> d3d9.lib.
>>
>> Any theories why MAKE_HRESULT is undefined? Have I forgotten to link to 
>> something?
>
> You could maybe try Derelict: http://www.dsource.org/projects/derelict
>

Sorry, I thought Derelict did DirectX. Looking at it now, I guess maybe it 
doesn't.

Re: WindowsAPI Binding - Linker Errors

2011-06-13 Thread Nick Sabalausky

"Loopback"  wrote in message 
news:it4ud4$1kf5$1...@digitalmars.com...
> Hello!
>
> I've been test programming win32 applications recently, and since the 
> phobos win32 library is so limited, I decided to download and test the 
> WindowsAPI Binding 
> (http://www.dsource.org/projects/bindings/wiki/WindowsApi). Using the 
> latest snapshot (as of this writing) I receive the following linker errors 
> when I compile:
>
> Error 42: Symbol Undefined _D5win328winerror12MAKE_HRESULTFbkkZi
> (MAKE_HRESULT is undefined).
>
> These are my imports: win32.mmsystem, win32.windef, win32.winuser, 
> win32.wingdi and win32.directx.d3d9.
>
> The problem lies within the DirectX module. If I do not import it, there 
> are no errors. I've taken the d3d9.lib and d3dx9.lib from the DirectX SDK 
> and used coffimplib and the linked to them, without success.
>
> These are the libraries I am linking to: gdi32.lib, winmm.lib and 
> d3d9.lib.
>
> Any theories why MAKE_HRESULT is undefined? Have I forgotten to link to 
> something?

You could maybe try Derelict: http://www.dsource.org/projects/derelict

Re: Int within ranges

== Auszug aus Steven Schveighoffer (schvei...@yahoo.com)'s Artikel
> On Mon, 13 Jun 2011 15:44:01 -0400, nrgyzer 
wrote:
> >> On Mon, 13 Jun 2011 14:52:24 -0400, nrgyzer 
> > wrote:
> >> >> On Mon, 13 Jun 2011 12:15:40 -0400, nrgyzer

> >> > wrote:
> >> >> > Hi there,
> >> >> >
> >> >> > is there any possibility to get a sliced array from another
> > array
> >> >> > between two ranges like:
> >> >> >
> >> >> > int[uint] myArray;
> >> >> > myArray[10] = 1000;
> >> >> > myArray[20] = 2000;
> >> >> > myArray[30] = 3000;
> >> >> > myArray[40] = 4000;
> >> >> > myArray[50] = 5000;
> >> >> >
> >> >> > int[] newArray = myArray[>= 20 .. <= 40]; // not able to do
> > this
> >> >> > writeln(newArray); // should print [2000, 3000, 4000]
> >> >> >
> >> >> > Is there any way to do this?
> >> >> import dcollections.TreeMap;
> >> >> auto myArray = new TreeMap!(uint, int);
> >> >> myArray[10] = 1000;
> >> >> myArray[20] = 2000;
> >> >> myArray[30] = 3000;
> >> >> myArray[40] = 4000;
> >> >> myArray[50] = 5000;
> >> >> // this is a little kludgy, but necessary since you require
<= 40
> >> >> auto c = myArray.elemAt(40);
> >> >> c.popFront();
> >> >> int newArray = array(myArray[20..c]);
> >> >> Note two things:
> >> >> 1. int[uint] is a hash, and so has no particular order.
> > Therefore,
> >> > there
> >> >> is no guarantee of iteration order, or that a range of such a
> >> > container
> >> >> (if one existed) would be properly constructed with two
keys.  A
> >> > TreeMap,
> >> >> or RedBlackTree, is sorted, and so the order is guaranteed.
> >> >> 2. dcollections.TreeMap is implemented with the same
collection
> > as
> >> >> std.container.RedBlackTree, so you could potentially do the
same
> >> > thing
> >> >> with it.  But the dcollections.TreeMap API is more polished.
> >> >> -Steve
> >> >
> >> > Exactly what I'm looking for, but how can I realize that it
also
> >> > gives me the elements when the key doesn't exists like:
> >> >
> >> > import std.range;
> >> > import dcollections.TreeMap;
> >> >
> >> > auto myArray = new TreeMap!(uint, int);
> >> >
> >> > myArray[10] = 1000;
> >> > myArray[20] = 2000;
> >> > myArray[30] = 3000;
> >> > myArray[45] = 4500;
> >> > myArray[50] = 5000;
> >> >
> >> > auto c = myArray.elemAt(40);
> >> > c.popFront();
> >> > int[] newArray = array(myArray[20..c]);
> >> > writeln(newArray);
> >> >
> >> > This will throw an exception because element 40 doesn't exist.
Is
> >> > there any possibility to get the element 20 and 30 from this
map?
> >> It might be useful to have elemAt return an empty range that is
> > located at
> >> the place the element *would* be.
> >> When this code was first written, in order to detect whether
elemAt
> > found
> >> your element, you compared it to container.end (similar to C++'s
> > STL).
> >> But now that cursors are tiny ranges, and have an empty
property, I
> > can
> >> use that to indicate the element wasn't exactly found.  So I can
> > change
> >> the semantics to find the place the element *would* be.
> >> myArray[20..41];
> >> and it will find all elements >= 20 and < 41, regardless of
whether
> > 20 and
> >> 41 were valid elements.
> >> Hm... can you post this as an enhancement to dcollections so it's
> > not
> >> forgotten?
> >> http://www.dsource.org/projects/dcollections/newticket
> >> -Steve
> >
> > Thanks! I created a new ticket... by the way - is there any bug in
> > DMD 2.053 by using my own opCmp? The following code throws me an
> > HiddenFuncException:
> >
> > private import std.stdio : writeln;
> >
> > class Example {
> >
> > int pId;
> >
> > this(int id) {
> >
> > pId = id;
> >
> > }
> >
> > int opCmp(ref Example other) {
> The signature of this function must be
> int opCmp(Object other)
> Note, also, that ref is unnecessary, as all objects (i.e. class
instances)
> are passed by reference.
> -Steve

Works, thanks for all that!

Re: Int within ranges


On Mon, 13 Jun 2011 15:44:01 -0400, nrgyzer  wrote:


On Mon, 13 Jun 2011 14:52:24 -0400, nrgyzer 

wrote:

>> On Mon, 13 Jun 2011 12:15:40 -0400, nrgyzer 
> wrote:
>> > Hi there,
>> >
>> > is there any possibility to get a sliced array from another

array

>> > between two ranges like:
>> >
>> > int[uint] myArray;
>> > myArray[10] = 1000;
>> > myArray[20] = 2000;
>> > myArray[30] = 3000;
>> > myArray[40] = 4000;
>> > myArray[50] = 5000;
>> >
>> > int[] newArray = myArray[>= 20 .. <= 40]; // not able to do

this

>> > writeln(newArray); // should print [2000, 3000, 4000]
>> >
>> > Is there any way to do this?
>> import dcollections.TreeMap;
>> auto myArray = new TreeMap!(uint, int);
>> myArray[10] = 1000;
>> myArray[20] = 2000;
>> myArray[30] = 3000;
>> myArray[40] = 4000;
>> myArray[50] = 5000;
>> // this is a little kludgy, but necessary since you require <= 40
>> auto c = myArray.elemAt(40);
>> c.popFront();
>> int newArray = array(myArray[20..c]);
>> Note two things:
>> 1. int[uint] is a hash, and so has no particular order.

Therefore,

> there
>> is no guarantee of iteration order, or that a range of such a
> container
>> (if one existed) would be properly constructed with two keys.  A
> TreeMap,
>> or RedBlackTree, is sorted, and so the order is guaranteed.
>> 2. dcollections.TreeMap is implemented with the same collection

as

>> std.container.RedBlackTree, so you could potentially do the same
> thing
>> with it.  But the dcollections.TreeMap API is more polished.
>> -Steve
>
> Exactly what I'm looking for, but how can I realize that it also
> gives me the elements when the key doesn't exists like:
>
> import std.range;
> import dcollections.TreeMap;
>
> auto myArray = new TreeMap!(uint, int);
>
> myArray[10] = 1000;
> myArray[20] = 2000;
> myArray[30] = 3000;
> myArray[45] = 4500;
> myArray[50] = 5000;
>
> auto c = myArray.elemAt(40);
> c.popFront();
> int[] newArray = array(myArray[20..c]);
> writeln(newArray);
>
> This will throw an exception because element 40 doesn't exist. Is
> there any possibility to get the element 20 and 30 from this map?
It might be useful to have elemAt return an empty range that is

located at

the place the element *would* be.
When this code was first written, in order to detect whether elemAt

found

your element, you compared it to container.end (similar to C++'s

STL).

But now that cursors are tiny ranges, and have an empty property, I

can

use that to indicate the element wasn't exactly found.  So I can

change

the semantics to find the place the element *would* be.
myArray[20..41];
and it will find all elements >= 20 and < 41, regardless of whether

20 and

41 were valid elements.
Hm... can you post this as an enhancement to dcollections so it's

not

forgotten?
http://www.dsource.org/projects/dcollections/newticket
-Steve


Thanks! I created a new ticket... by the way - is there any bug in
DMD 2.053 by using my own opCmp? The following code throws me an
HiddenFuncException:

private import std.stdio : writeln;

class Example {

int pId;

this(int id) {

pId = id;

}

int opCmp(ref Example other) {


The signature of this function must be

int opCmp(Object other)

Note, also, that ref is unnecessary, as all objects (i.e. class instances)  
are passed by reference.


-Steve

Re: Int within ranges

> On Mon, 13 Jun 2011 14:52:24 -0400, nrgyzer 
wrote:
> >> On Mon, 13 Jun 2011 12:15:40 -0400, nrgyzer 
> > wrote:
> >> > Hi there,
> >> >
> >> > is there any possibility to get a sliced array from another
array
> >> > between two ranges like:
> >> >
> >> > int[uint] myArray;
> >> > myArray[10] = 1000;
> >> > myArray[20] = 2000;
> >> > myArray[30] = 3000;
> >> > myArray[40] = 4000;
> >> > myArray[50] = 5000;
> >> >
> >> > int[] newArray = myArray[>= 20 .. <= 40]; // not able to do
this
> >> > writeln(newArray); // should print [2000, 3000, 4000]
> >> >
> >> > Is there any way to do this?
> >> import dcollections.TreeMap;
> >> auto myArray = new TreeMap!(uint, int);
> >> myArray[10] = 1000;
> >> myArray[20] = 2000;
> >> myArray[30] = 3000;
> >> myArray[40] = 4000;
> >> myArray[50] = 5000;
> >> // this is a little kludgy, but necessary since you require <= 40
> >> auto c = myArray.elemAt(40);
> >> c.popFront();
> >> int newArray = array(myArray[20..c]);
> >> Note two things:
> >> 1. int[uint] is a hash, and so has no particular order.
Therefore,
> > there
> >> is no guarantee of iteration order, or that a range of such a
> > container
> >> (if one existed) would be properly constructed with two keys.  A
> > TreeMap,
> >> or RedBlackTree, is sorted, and so the order is guaranteed.
> >> 2. dcollections.TreeMap is implemented with the same collection
as
> >> std.container.RedBlackTree, so you could potentially do the same
> > thing
> >> with it.  But the dcollections.TreeMap API is more polished.
> >> -Steve
> >
> > Exactly what I'm looking for, but how can I realize that it also
> > gives me the elements when the key doesn't exists like:
> >
> > import std.range;
> > import dcollections.TreeMap;
> >
> > auto myArray = new TreeMap!(uint, int);
> >
> > myArray[10] = 1000;
> > myArray[20] = 2000;
> > myArray[30] = 3000;
> > myArray[45] = 4500;
> > myArray[50] = 5000;
> >
> > auto c = myArray.elemAt(40);
> > c.popFront();
> > int[] newArray = array(myArray[20..c]);
> > writeln(newArray);
> >
> > This will throw an exception because element 40 doesn't exist. Is
> > there any possibility to get the element 20 and 30 from this map?
> It might be useful to have elemAt return an empty range that is
located at
> the place the element *would* be.
> When this code was first written, in order to detect whether elemAt
found
> your element, you compared it to container.end (similar to C++'s
STL).
> But now that cursors are tiny ranges, and have an empty property, I
can
> use that to indicate the element wasn't exactly found.  So I can
change
> the semantics to find the place the element *would* be.
> myArray[20..41];
> and it will find all elements >= 20 and < 41, regardless of whether
20 and
> 41 were valid elements.
> Hm... can you post this as an enhancement to dcollections so it's
not
> forgotten?
> http://www.dsource.org/projects/dcollections/newticket
> -Steve

Thanks! I created a new ticket... by the way - is there any bug in
DMD 2.053 by using my own opCmp? The following code throws me an
HiddenFuncException:

private import std.stdio : writeln;

class Example {

int pId;

this(int id) {

pId = id;

}

int opCmp(ref Example other) {

return pId - other.pId;

}

}

int main(string[] args) {

Example[] exps;
exps ~= new Example(1);
exps ~= new Example(2);
writeln(exps.sort);

return 1;

}

Re: Int within ranges

On Mon, 13 Jun 2011 14:52:24 -0400, nrgyzer  wrote:

On Mon, 13 Jun 2011 12:15:40 -0400, nrgyzer 

wrote:

> Hi there,
>
> is there any possibility to get a sliced array from another array
> between two ranges like:
>
> int[uint] myArray;
> myArray[10] = 1000;
> myArray[20] = 2000;
> myArray[30] = 3000;
> myArray[40] = 4000;
> myArray[50] = 5000;
>
> int[] newArray = myArray[>= 20 .. <= 40]; // not able to do this
> writeln(newArray); // should print [2000, 3000, 4000]
>
> Is there any way to do this?
import dcollections.TreeMap;
auto myArray = new TreeMap!(uint, int);
myArray[10] = 1000;
myArray[20] = 2000;
myArray[30] = 3000;
myArray[40] = 4000;
myArray[50] = 5000;
// this is a little kludgy, but necessary since you require <= 40
auto c = myArray.elemAt(40);
c.popFront();
int newArray = array(myArray[20..c]);
Note two things:
1. int[uint] is a hash, and so has no particular order.  Therefore,

there

is no guarantee of iteration order, or that a range of such a

container

(if one existed) would be properly constructed with two keys.  A

TreeMap,

or RedBlackTree, is sorted, and so the order is guaranteed.
2. dcollections.TreeMap is implemented with the same collection as
std.container.RedBlackTree, so you could potentially do the same

thing

with it.  But the dcollections.TreeMap API is more polished.
-Steve

Exactly what I'm looking for, but how can I realize that it also
gives me the elements when the key doesn't exists like:

import std.range;
import dcollections.TreeMap;

auto myArray = new TreeMap!(uint, int);

myArray[10] = 1000;
myArray[20] = 2000;
myArray[30] = 3000;
myArray[45] = 4500;
myArray[50] = 5000;

auto c = myArray.elemAt(40);
c.popFront();
int[] newArray = array(myArray[20..c]);
writeln(newArray);

This will throw an exception because element 40 doesn't exist. Is
there any possibility to get the element 20 and 30 from this map?

It might be useful to have elemAt return an empty range that is located at  
the place the element *would* be.

When this code was first written, in order to detect whether elemAt found  
your element, you compared it to container.end (similar to C++'s STL).   
But now that cursors are tiny ranges, and have an empty property, I can  
use that to indicate the element wasn't exactly found.  So I can change  
the semantics to find the place the element *would* be.

myArray[20..41];

and it will find all elements >= 20 and < 41, regardless of whether 20 and  
41 were valid elements.

Hm... can you post this as an enhancement to dcollections so it's not  
forgotten?

http://www.dsource.org/projects/dcollections/newticket

-Steve

Re: Int within ranges

> On Mon, 13 Jun 2011 12:15:40 -0400, nrgyzer 
wrote:
> > Hi there,
> >
> > is there any possibility to get a sliced array from another array
> > between two ranges like:
> >
> > int[uint] myArray;
> > myArray[10] = 1000;
> > myArray[20] = 2000;
> > myArray[30] = 3000;
> > myArray[40] = 4000;
> > myArray[50] = 5000;
> >
> > int[] newArray = myArray[>= 20 .. <= 40]; // not able to do this
> > writeln(newArray); // should print [2000, 3000, 4000]
> >
> > Is there any way to do this?
> import dcollections.TreeMap;
> auto myArray = new TreeMap!(uint, int);
> myArray[10] = 1000;
> myArray[20] = 2000;
> myArray[30] = 3000;
> myArray[40] = 4000;
> myArray[50] = 5000;
> // this is a little kludgy, but necessary since you require <= 40
> auto c = myArray.elemAt(40);
> c.popFront();
> int newArray = array(myArray[20..c]);
> Note two things:
> 1. int[uint] is a hash, and so has no particular order.  Therefore,
there
> is no guarantee of iteration order, or that a range of such a
container
> (if one existed) would be properly constructed with two keys.  A
TreeMap,
> or RedBlackTree, is sorted, and so the order is guaranteed.
> 2. dcollections.TreeMap is implemented with the same collection as
> std.container.RedBlackTree, so you could potentially do the same
thing
> with it.  But the dcollections.TreeMap API is more polished.
> -Steve

Exactly what I'm looking for, but how can I realize that it also
gives me the elements when the key doesn't exists like:

import std.range;
import dcollections.TreeMap;

auto myArray = new TreeMap!(uint, int);

myArray[10] = 1000;
myArray[20] = 2000;
myArray[30] = 3000;
myArray[45] = 4500;
myArray[50] = 5000;

auto c = myArray.elemAt(40);
c.popFront();
int[] newArray = array(myArray[20..c]);
writeln(newArray);

This will throw an exception because element 40 doesn't exist. Is
there any possibility to get the element 20 and 30 from this map?

Re: Int within ranges

On 2011-06-13 09:15, nrgyzer wrote:
> Hi there,
> 
> is there any possibility to get a sliced array from another array
> between two ranges like:
> 
> int[uint] myArray;
> myArray[10] = 1000;
> myArray[20] = 2000;
> myArray[30] = 3000;
> myArray[40] = 4000;
> myArray[50] = 5000;
> 
> int[] newArray = myArray[>= 20 .. <= 40]; // not able to do this
> writeln(newArray); // should print [2000, 3000, 4000]
> 
> Is there any way to do this?

Slices take a contiguous chunk of an array. You can't skip any values. So, if 
you want them separate, you're going to have to put them in another container 
yourself.

- Jonathan M Davis

Re: Int within ranges

On Mon, 13 Jun 2011 13:25:39 -0400, bearophile <  
 wrote:



Steven Schveighoffer:


But the dcollections.TreeMap API is more polished.


I think most people will want to use just Phobos, to avoid a dependency,  
even if the Phobos one is less polished...


Sure, but it's difficult to demonstrate a possible solution without having  
the API for slicing present in the phobos version...


Essentially, what I'm saying is it *could* be done in Phobos, if phobos'  
RedBlackTree was updated to be like dcollections'.


-Steve

Re: Int within ranges

Steven Schveighoffer:

> But the dcollections.TreeMap API is more polished.

I think most people will want to use just Phobos, to avoid a dependency, even 
if the Phobos one is less polished...

Bye,
bearophile

Re: Int within ranges


On Mon, 13 Jun 2011 12:15:40 -0400, nrgyzer  wrote:


Hi there,

is there any possibility to get a sliced array from another array
between two ranges like:

int[uint] myArray;
myArray[10] = 1000;
myArray[20] = 2000;
myArray[30] = 3000;
myArray[40] = 4000;
myArray[50] = 5000;

int[] newArray = myArray[>= 20 .. <= 40]; // not able to do this
writeln(newArray); // should print [2000, 3000, 4000]

Is there any way to do this?


import dcollections.TreeMap;

auto myArray = new TreeMap!(uint, int);

myArray[10] = 1000;
myArray[20] = 2000;
myArray[30] = 3000;
myArray[40] = 4000;
myArray[50] = 5000;

// this is a little kludgy, but necessary since you require <= 40
auto c = myArray.elemAt(40);
c.popFront();
int newArray = array(myArray[20..c]);

Note two things:

1. int[uint] is a hash, and so has no particular order.  Therefore, there  
is no guarantee of iteration order, or that a range of such a container  
(if one existed) would be properly constructed with two keys.  A TreeMap,  
or RedBlackTree, is sorted, and so the order is guaranteed.
2. dcollections.TreeMap is implemented with the same collection as  
std.container.RedBlackTree, so you could potentially do the same thing  
with it.  But the dcollections.TreeMap API is more polished.


-Steve

Int within ranges

Hi there,

is there any possibility to get a sliced array from another array
between two ranges like:

int[uint] myArray;
myArray[10] = 1000;
myArray[20] = 2000;
myArray[30] = 3000;
myArray[40] = 4000;
myArray[50] = 5000;

int[] newArray = myArray[>= 20 .. <= 40]; // not able to do this
writeln(newArray); // should print [2000, 3000, 4000]

Is there any way to do this?

Re: simple syntax issue with template

2011-06-13 Thread Joshua Niehus

> I'm trying to create 2 extra method for arrays ("range" would be
> better, though I don't quite understand what is a "range")
> Although I have some indecipherable (to me) compiler error...
>
> What's wrong with the code below?
> ==
> import std.algorithm;
>
> public:
>
> void remove(T)(ref T[] array, T element)
> {
>auto index = array.countUntil!("a == b", T[], T)(array, element);
>removeAt(index);
> }
>
> void removeAt(T)(ref T[] array, sizediff_t index)
> {
>if(index < 0 || index >= array.length)
>return;
>array.replaceInPlace(index, index + 1, []);
> }
>
>
> unittest
> {
>auto a = [1, 3, 4];
>a.remove(3);
>assert(a == [1, 4]);
> }
> ==

Hi Lloyd,

why not just use the built in functionality of arrays?

//--
import std.stdio;

void main() {
auto a = [1, 2, 3, 4, 5, 6, 7, 8];
remove(a, 3);

foreach (i; a) {
write(i, " ");
}
writeln("");
}

void remove(T) (ref T[] myarray, int element) {
auto front = myarray[0 .. (element -1)];
auto back =  myarray[element .. $];
myarray = front ~ back;
// or simply: myarray = myarray[0 .. (element - 1)] ~ myarray[element ..
$];
}
//--

Josh

Re: simple syntax issue with template

2011-06-13 Thread Dmitry Olshansky


On 13.06.2011 16:49, Lloyd Dupont wrote:

ho.. plenty of silly mistake indeed.. thanks for spotting them!
(maybe I should take a break and play the witcher 2 hey!?!? :)


Why not ? ;-)


however I still have a problem with removeAt now! :(
===
void removeAt(T)(ref T[] array, int index)
{
   if(index < 0 || index >= array.length)
   return;
   array.replaceInPlace(index, index + 1, []);
}
Yeah, I think I've hit this issue before, and used plain cast(T[])[]. 
The problem is that [] is null of type void[], and template fails to 
resolve type. Seems like insertInPlace probably should take this special 
case into account.



===
will produce the following errors:
===
Error: template std.array.replaceInPlace(T,Range) if 
(isDynamicArray!(Range) && is(ElementEncodingType!(Range) : T) && 
!is(T == const(T)) && !is(T == immutable(T))) does not match any 
function template declaration
Error: template std.array.replaceInPlace(T,Range) if 
(isDynamicArray!(Range) && is(ElementEncodingType!(Range) : T) && 
!is(T == const(T)) && !is(T == immutable(T))) cannot deduce template 
function from argument types !()(int[],int,int,void[])

===

mmm.. strangely enough the code below succeed!

void removeAt(T)(ref T[] array, int index)
{
   if(index < 0 || index >= array.length)
   return;
   T[] empty;
   array.replaceInPlace(index, index + 1, empty);
}

but T[].init didn't work either?! ho well, thanks! :)



--
Dmitry Olshansky

Re: dmd vs rdmd

2011-06-13 Thread Joshua Niehus

Thanks Jonathan, that cleared things up for me.

Josh

On Sat, Jun 11, 2011 at 12:00 PM,  wrote:

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> Today's Topics:
>
>   1. dmd vs rdmd (Joshua Niehus)
>   2. Re: dmd vs rdmd (Jonathan M Davis)
>   3. Re: dmd vs rdmd (Andrej Mitrovic)
>   4. char[] to string (Jonathan Sternberg)
>   5. Re: char[] to string (Jonathan M Davis)
>   6. Re: DMD Backend: Deciding instructions to use/avoid?
>  (Nick Sabalausky)
>   7. Re: char[] to string (bearophile)
>
>
> --
>
> Message: 1
> Date: Fri, 10 Jun 2011 14:28:41 -0700
> From: Joshua Niehus 
> To: digitalmars-d-learn@puremagic.com
> Subject: dmd vs rdmd
> Message-ID: 
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello,
>
> I am trying to compile code which is composed of two modules (in the same
> directory):
>
> main.d
> foo.d
>
> foo.d just declares a class Foo which has a string variable "bar" which i
> set to "hello" and main.d just prints bar's value to the console:
>
> // - main.d ---
> import std.stdio, foo;
>
> void main() {
>Foo f = new Foo;
>writeln(f.bar);
> }
>
> When i attempt to compile main.d via:
> $dmd main.d
> I get undefined symbol errors.
>
> But when I run:
> $rdmd main.d
> it works as expected.
>
> The only way I could get main.d to compile with just dmd was to compile foo
> as a lib first and then compile main.d and passing the foo.a file as an
> argument:
> $dmd -lib foo.d
> $dmd main.d foo.a
>
> Is this normal?
> I got the impression from TDPL (Alexandrescu) that the dmd compiler would
> automatically search the root directory, find foo.d, work its magic, and
> create all the symbols that were defined in foo.d for main.d to compile...
>
> Thanks,
> Josh
> -- next part --
> An HTML attachment was scrubbed...
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> http://lists.puremagic.com/pipermail/digitalmars-d-learn/attachments/20110610/dccf485f/attachment-0001.html
> >
>
> --
>
> Message: 2
> Date: Fri, 10 Jun 2011 21:50:37 +
> From: "Jonathan M Davis" 
> To: "digitalmars.D.learn" 
> Subject: Re: dmd vs rdmd
> Message-ID: <20110610215037.56...@gmx.com>
> Content-Type: text/plain; charset="utf-8"
>
> On 2011-06-10 14:28, Joshua Niehus wrote:
> > Hello,
> >
> > I am trying to compile code which is composed of two modules (in the same
> > directory):
> >
> > main.d
> > foo.d
> >
> > foo.d just declares a class Foo which has a string variable "bar" which i
> > set to "hello" and main.d just prints bar's value to the console:
> >
> > // - main.d ---
> > import std.stdio, foo;
> >
> > void main() {
> > Foo f = new Foo;
> > writeln(f.bar);
> > }
> >
> > When i attempt to compile main.d via:
> > $dmd main.d
> > I get undefined symbol errors.
> >
> > But when I run:
> > $rdmd main.d
> > it works as expected.
> >
> > The only way I could get main.d to compile with just dmd was to compile
> foo
> > as a lib first and then compile main.d and passing the foo.a file as an
> > argument:
> > $dmd -lib foo.d
> > $dmd main.d foo.a
> >
> > Is this normal?
> > I got the impression from TDPL (Alexandrescu) that the dmd compiler would
> > automatically search the root directory, find foo.d, work its magic, and
> > create all the symbols that were defined in foo.d for main.d to
> compile...
>
> With dmd, you must list every file that you're compiling. The only
> exceptions
> are that when dealing with libraries, dmd to have the root directory where
> the
> source is passed to -I, and it needs to have the root directory where the
> library is given with -L and -l with the library name (or just the library
> directly if you don't want it to search for the library). It's like gcc and
> dmc in that respect. It does nothing extra to track down files to compile
> for
> you. It'll find the source for importing thanks to -I, but it won't compile
> it. You must still compile it. You don't normally need -I or -L however,
> because dmd.conf (or sc.ini on Windows) already adds the appropriate flags
> for
> Phobos for you. You only need too specify them yourself when using other
> libraries.
>
> rdmd does extra magic to automatically track down all of the files that
> main.d
> imports and compile them. dmd doesn't do that.
>
> - Jonathan M Davis
>
>
> --
>
> Message: 3
> Date: Sat, 11 Jun 2011 01:08:50 +0200
> From: Andrej Mitrovic 
> To: "digitalm

Re: introspection woes (2)


Works a treat!
Thanks for your detailed sample! :)



"Robert Clipsham"  wrote in message news:it5395$2028$1...@digitalmars.com... 


See: http://www.digitalmars.com/d/2.0/traits.html

class MyClass
{
void method1(){}
void method2(){}
}

import std.stdio;

void main()
{
foreach (member; __traits(allMembers, MyClass))
writefln("member: %s", member);

foreach (member; __traits(derivedMembers, MyClass))
writefln("derived member: %s", member);
}


Instead of writefln() you can append to an array. You can also make this 
a bit more generic with:


class MyClass
{
mixin memberArray!MyClass;
void method1(){}
void method2(){}
}

import std.stdio;

mixin template memberArray(T)
{
immutable static members = [__traits(derivedMembers, T)];
}

void main()
{
foreach (member; MyClass.members)
writefln("member: %s", member);
}


Hope this helps :)

--
Robert
http://octarineparrot.com/

Re: introspection woes (2)

2011-06-13 Thread Robert Clipsham


On 13/06/2011 13:56, Lloyd Dupont wrote:

Thanks Robert!

Mm.. can you (per chance!) share some code?
I'm a newbie and compile time reflection is something which eludes me
(so far...)!


See: http://www.digitalmars.com/d/2.0/traits.html

class MyClass
{
void method1(){}
void method2(){}
}

import std.stdio;

void main()
{
foreach (member; __traits(allMembers, MyClass))
writefln("member: %s", member);

foreach (member; __traits(derivedMembers, MyClass))
writefln("derived member: %s", member);
}


Instead of writefln() you can append to an array. You can also make this 
a bit more generic with:


class MyClass
{
mixin memberArray!MyClass;
void method1(){}
void method2(){}
}

import std.stdio;

mixin template memberArray(T)
{
immutable static members = [__traits(derivedMembers, T)];
}

void main()
{
foreach (member; MyClass.members)
writefln("member: %s", member);
}


Hope this helps :)

--
Robert
http://octarineparrot.com/

Re: introspection woes (2)


Thanks Robert!

Mm.. can you (per chance!) share some code?
I'm a newbie and compile time reflection is something which eludes me (so 
far...)!



"Robert Clipsham"  wrote in message news:it4vp1$1n5q$1...@digitalmars.com...


Anyway of ... making the runtime update xgetMembers?


My understanding is that xgetMembers is never filled in due to the
overhead it would add. You can recompile dmd to support it, but that's a
pain. The work around I use is to  put a mixin in every class I want to
use which uses compile time reflection to build an array which I can
access at runtime. Not the most elegant solution. Perhap's a bug report
needs opening for this if one isn't already open.

Re: simple syntax issue with template


ho.. plenty of silly mistake indeed.. thanks for spotting them!
(maybe I should take a break and play the witcher 2 hey!?!? :)

however I still have a problem with removeAt now! :(
===
void removeAt(T)(ref T[] array, int index)
{
   if(index < 0 || index >= array.length)
   return;
   array.replaceInPlace(index, index + 1, []);
}
===
will produce the following errors:
===
Error: template std.array.replaceInPlace(T,Range) if (isDynamicArray!(Range) 
&& is(ElementEncodingType!(Range) : T) && !is(T == const(T)) && !is(T == 
immutable(T))) does not match any function template declaration
Error: template std.array.replaceInPlace(T,Range) if (isDynamicArray!(Range) 
&& is(ElementEncodingType!(Range) : T) && !is(T == const(T)) && !is(T == 
immutable(T))) cannot deduce template function from argument types 
!()(int[],int,int,void[])

===

mmm.. strangely enough the code below succeed!

void removeAt(T)(ref T[] array, int index)
{
   if(index < 0 || index >= array.length)
   return;
   T[] empty;
   array.replaceInPlace(index, index + 1, empty);
}

but T[].init didn't work either?! ho well, thanks! :)

Re: introspection woes (2)

2011-06-13 Thread Robert Clipsham


On 13/06/2011 13:11, Lloyd Dupont wrote:

Interesting... I think I understand...
Thanks! :)

However an other problem arise with getMembers() it always returns null!
Looking at the code it seems (from my beginner's perspective) that
getMembers() rely on the member field (function) xgetMembers which is
always null, as far as I can tell (didn't see any assignment...)

Anyway of ... making the runtime update xgetMembers?


My understanding is that xgetMembers is never filled in due to the 
overhead it would add. You can recompile dmd to support it, but that's a 
pain. The work around I use is to  put a mixin in every class I want to 
use which uses compile time reflection to build an array which I can 
access at runtime. Not the most elegant solution. Perhap's a bug report 
needs opening for this if one isn't already open.


--
Robert
http://octarineparrot.com/

Re: simple syntax issue with template


removed some obvious error, still stumped on the templated syntax ...
so.. why is it not compiling?
(error:
Error: template std.algorithm.countUntil(alias pred = "a == b",R1,R2) if 
(is(typeof(startsWith!(pred)(haystack,needle does not match any function 
template declaration

)
=
import std.algorithm;

public:

void remove(T)(ref T[] array, T element)
{
   sizediff_t index = array.countUntil!("a == b", T[], T)(array, element);
   removeAt(array, index);
}

void removeAt(T)(ref T[] array, sizediff_t index)
{
   if(index < 0 || index >= array.length)
   return;
   array.replaceInPlace(index, index + 1, []);
}


unittest
{
   auto a = [1, 3, 4];
   a.remove(3);
   assert(a == [1, 4]);
}
=

Re: simple syntax issue with template

2011-06-13 Thread Dmitry Olshansky


On 13.06.2011 16:03, Lloyd Dupont wrote:
I'm trying to create 2 extra method for arrays ("range" would be 
better, though I don't quite understand what is a "range")

Although I have some indecipherable (to me) compiler error...

What's wrong with the code below?
==
import std.algorithm;

public:

void remove(T)(ref T[] array, T element)
{
   auto index = array.countUntil!("a == b", T[], T)(array, element);
   removeAt(index);
}

void removeAt(T)(ref T[] array, sizediff_t index)
{
   if(index < 0 || index >= array.length)
   return;
   array.replaceInPlace(index, index + 1, []);
}


unittest
{
   auto a = [1, 3, 4];
   a.remove(3);
   assert(a == [1, 4]);
}
==


It's not exactly clear what's your problem, since you haven't put a 
tiniest description of what the compiler outputs.

still:
array.countUntil!("a == b", T[], T)(array, element);
should be ether
countUntil!("a == b", T[], T)(array, element);
or:
array.countUntil!("a == b", T[], T)( element);

also drop thouse ugly explicit template params (the compiler can and 
would figure them out anyway):
array.countUntil!"a == b"(element);  //same as default 
array.countUntil(element);


another one:
removeAt(index);
should be array.removeAt(index) or removeAt(array, index);

And last but not least there is remove in Phobos, it's just link to it 
from summary table is constantly getting screwed up.


--
Dmitry Olshansky

Re: introspection woes (2)


Interesting... I think I understand...
Thanks! :)

However an other problem arise with getMembers() it always returns null!
Looking at the code it seems (from my beginner's perspective) that 
getMembers() rely on the member field (function) xgetMembers which is always 
null, as far as I can tell (didn't see any assignment...)


Anyway of ... making the runtime update xgetMembers?



"Johannes Pfau"  wrote in message 
news:20110613140030.70c8d27b@jpf-Satellite-A100...


Lloyd Dupont wrote:

trying to learn introspection, I have this simple test method:

===
static void dumpelement(Object o)
{
   if (!o)
   return;

   auto ci = o.classinfo;
   foreach(mi ; ci.getMembers(null))
   {
   writefln("%s . %s", ci.name, mi.name());
   }
}
==

Looks like getMembers() returns 'const MemberInfo' but name() is not
declared as const. That's likely a bug in druntime, but as a workaround
you can try this:

==
writefln("%s . %s", ci.name, (cast(MemberInfo)mi).name());
==

simple syntax issue with template

I'm trying to create 2 extra method for arrays ("range" would be better, 
though I don't quite understand what is a "range")

Although I have some indecipherable (to me) compiler error...

What's wrong with the code below?
==
import std.algorithm;

public:

void remove(T)(ref T[] array, T element)
{
   auto index = array.countUntil!("a == b", T[], T)(array, element);
   removeAt(index);
}

void removeAt(T)(ref T[] array, sizediff_t index)
{
   if(index < 0 || index >= array.length)
   return;
   array.replaceInPlace(index, index + 1, []);
}


unittest
{
   auto a = [1, 3, 4];
   a.remove(3);
   assert(a == [1, 4]);
}
==

Re: introspection woes (2)

2011-06-13 Thread Johannes Pfau

Lloyd Dupont wrote:
>trying to learn introspection, I have this simple test method:
>
>===
>static void dumpelement(Object o)
>{
>if (!o)
>return;
>
>auto ci = o.classinfo;
>foreach(mi ; ci.getMembers(null))
>{
>writefln("%s . %s", ci.name, mi.name());
>}
>}
>==
>
>However it fails to compile with the following error: (any ideas?)
>===
>main.d(57): Error: function object.MemberInfo.name () is not callable
>using argument types () const
>Building Debug\dtest.exe failed! 
>

Looks like getMembers() returns 'const MemberInfo' but name() is not
declared as const. That's likely a bug in druntime, but as a workaround
you can try this:

==
writefln("%s . %s", ci.name, (cast(MemberInfo)mi).name());
==
-- 
Johannes Pfau

WindowsAPI Binding - Linker Errors


Hello!

I've been test programming win32 applications recently, and since the 
phobos win32 library is so limited, I decided to download and test the 
WindowsAPI Binding 
(http://www.dsource.org/projects/bindings/wiki/WindowsApi). Using the 
latest snapshot (as of this writing) I receive the following linker 
errors when I compile:


Error 42: Symbol Undefined _D5win328winerror12MAKE_HRESULTFbkkZi
(MAKE_HRESULT is undefined).

These are my imports: win32.mmsystem, win32.windef, win32.winuser, 
win32.wingdi and win32.directx.d3d9.


The problem lies within the DirectX module. If I do not import it, there 
are no errors. I've taken the d3d9.lib and d3dx9.lib from the DirectX 
SDK and used coffimplib and the linked to them, without success.


These are the libraries I am linking to: gdi32.lib, winmm.lib and d3d9.lib.

Any theories why MAKE_HRESULT is undefined? Have I forgotten to link to 
something?

introspection woes (2)


trying to learn introspection, I have this simple test method:

===
static void dumpelement(Object o)
{
   if (!o)
   return;

   auto ci = o.classinfo;
   foreach(mi ; ci.getMembers(null))
   {
   writefln("%s . %s", ci.name, mi.name());
   }
}
==

However it fails to compile with the following error: (any ideas?)
===
main.d(57): Error: function object.MemberInfo.name () is not callable using 
argument types () const
Building Debug\dtest.exe failed!

Re: Is it reasonable to learn D

Let's learn together then! :P
http://galador.net/codeblog/?tag=/D

While my blog post are only about setting up the environment so far.. I have
delved in the code for 2 weeks now! (Although I had some day off (work and
programing) in Darwin) I'm right into it now, should have a new blog post
soon! About programing this time!

My verdict: it's frustrating yes. But D has a couple of advantages and 2
that you might like:
- D has event / delegate, just like C# (and unlike C++, or maybe C++ has
them, (it has method pointer, right!?) but it's not taken advantage of!)
- the above point is probably what makes the C++ GUI so... difficult.
Whereas I found a GUI API for D just like WinForm! (DGui!)

In short summary I found these cool things:

VisualD 0.3.24 (plugin for programing from Visual Studio)
http://www.dsource.org/projects/visuald

VisualD NOTE: (system tweaks)(required) : edit sc.ini
http://www.dsource.org/projects/visuald/wiki/KnownIssues#Librarysearchpathnotpassedtolinker

DGui 02052011 (WinForm like API)
http://code.google.com/p/dgui/

Doost (r88) (serialization)
http://www.dsource.org/projects/doost

Windows API r371
http://dsource.org/projects/bindings/wiki/WindowsApi

"Fabian" wrote in message news:islvgf$1b61$1...@digitalmars.com...

Dear D Community,
is it reasonable to learn D?
I've found a lot of good points for D but I've found a lot of negative
points too. I believe that I needn't to list all the point for D but I
want to give a few examples against learning D I've read in some German
and English boards:

- The D compiler has only bad code optimization
- There are no maintained GUI libraries
- The development of the compiler is very slow
- Only a small community
=> no real German community

So I ask you - Is it reasonable to learn D?
I'm looking forward to your answers.

Greetings Fabian

PS: If you want to contact me you are allowed to write an Email to me.
contact-...@freemail.de

Re: Object


I see mm
Thanks for the info!

"Jonathan M Davis"  wrote in message 
news:mailman.866.1307943671.14074.digitalmars-d-le...@puremagic.com...


Object is not currently const-correct:
http://d.puremagic.com/issues/show_bug.cgi?id=1824

As a result, a number of basic functions do not currently work with const
objects. So, making opEquals const means that it's not going to work. It
sucks, but until Object is fixed to be const-correct, that's the way it 
goes.

introspection woes...