Re: How does one attach a manifest file to a D executable on Windows?
On Sunday, 2 June 2024 at 21:46:41 UTC, solidstate1991 wrote: Well, it turns out I used the windres found in mingw instead of `rc.exe` since the latter cannot be found anywhere on my PC, even after reinstalling stuff. I need to hunt it down somehow. rc.exe comes with the Windows SDK - it gets installed in one of the subfolders of "C:\Program Files (x86)\Windows Kits\10\bin" (on my machine it's in "10.0.22000.0\x64").
Re: How does one attach a manifest file to a D executable on Windows?
On Saturday, 25 May 2024 at 13:13:08 UTC, solidstate1991 wrote: No, I meant something like this: https://learn.microsoft.com/en-us/windows/win32/controls/cookbook-overview Not tested but from memory I do this: 1) Copy that first XML snippet from the page you linked, save to a file called example.exe.manifest 2) Create a resource script file called resources.rc, with this at the top: 1 24 "example.exe.manifest" 3) Compile it with rc.exe 4) Include the resulting resources.res on your DMD command line You might also need to call InitCommonControls or InitCommonControlsEx before creating any windows.
Re: How can I tell D that function args are @nogc etc.
On Friday, 12 April 2024 at 15:08:50 UTC, Steven Schveighoffer
wrote:
On Friday, 12 April 2024 at 03:57:40 UTC, John Dougan wrote:
What is the procedure for bug reporting? I'm looking at the
issues tracker and have no clue how to drive the search to see
if this is already there.
https://issues.dlang.org
While entering the bug title, it does a fuzzy search for
existing open and closed issues.
The typical problem with issue/bug database searches is you have
to know the important discriminating keywords that projects
evolve over time. When you are new to a system, as I am with D,
you end up looking manually through a lot of possibles. Another
barrier to noobs that project long timers may not notice.
Any rate, it appears
https://issues.dlang.org/show_bug.cgi?id=22046 is the same issue.
And I'm not sure how to interpret it, as a noob I don't have
enough context. It appears to be deliberate and also afflicts var
declarations. Since 2014.
From my point of view, either it's still a bug and needs to be
written up in a best practices list with all the other long term
stuff you need to work around until it can be fixed (eg. "in
alias and var function declarations, put attributes as a suffix
because...", https://dlang.org/dstyle.html *might* be a place),
or it has aged in to become the effective intended behavior and
should be documented other places and have a compiler error or
warning ("@safe in prefix position in alias, is ignored"). Or of
course, it could get fixed but my experiences have shown me that
after 10 years that is low probability with most projects.
I'm not trying to be a dick here. I've managed projects and know
what unintentional dumb stuff can happen. But, at the moment, I'm
evaluating D for a project (porting 30,000 lines of very old C
with strict timing requirements) and I've got some time to build
impressions of system language candidates. There appears to be a
lot of talk from time to time over in General about luring new
people in to work with D, and this kind of issue is relevant.
-Steve
--john
Re: How can I tell D that function args are @nogc etc.
On Thursday, 11 April 2024 at 15:00:49 UTC, Steven Schveighoffer
wrote:
So D can provide a nice mechanism to show what is happening --
`pragma(msg, ...)`
If I do that with the two types above I see something *very*
interesting:
```d
pragma(msg, FnPrefixT);
pragma(msg, FnSuffixT);
```
```
bool function(int) nothrow @nogc
bool function(int) nothrow @nogc @safe
```
That surprises me. `nothrow` and `@nogc` go onto the type, but
not `@safe` if put before the declaration? I have no idea why.
All I can think of is that it is a bug.
`pragma(msg,...)` is very useful. Thanks.
My general impressions were correct then. It shouldn't matter on
which side the attrs get put, except in some ambiguous cases.
It's just broken. Not every day you get to blame a compiler bug.
Feeding:
```d
alias FnPrefixT = @safe nothrow @nogc bool function(int);
alias FnSuffixT = bool function(int) @safe nothrow @nogc ;
pragma(msg, FnPrefixT);
pragma(msg, FnSuffixT);
void main() { return; }
```
into run.dlang and having it compile with all the
compilers...gets the same result all the way back to 2.060. It
has this issue with gdc 2.076, which is what I'm using normally.
What is the procedure for bug reporting? I'm looking at the
issues tracker and have no clue how to drive the search to see if
this is already there.
-Steve
-- john
Re: How can I tell D that function args are @nogc etc.
Interesting. Thank you to both of you.
On Wednesday, 10 April 2024 at 17:38:21 UTC, Steven Schveighoffer
wrote:
On Wednesday, 10 April 2024 at 11:34:06 UTC, Richard (Rikki)
Andrew Cattermole wrote:
Place your attributes on the right hand side of the function,
not the left side.
Use the left side for attributes/type qualifiers that go on
the return type.
Just a word of warning, this explanation suggests putting
qualifiers on the left side would affect the return type, this
is not the case.
So in my example, what did I actually tell the compiler with the
placement of the attributes? And how was it different between the
function type alias declaration, and the actual function
declaration?
More specifically, what are the semantic differences below?
```d
alias FnPrefixT = @nogc nothrow @safe bool function(int);
// Versus
alias FnSuffixT = bool function(int) @nogc nothrow @safe;
```
and
```d
@nogc nothrow @safe bool fnPrefix(int) { stuff }
// Versus
bool fnSuffix(int) @nogc nothrow @safe { stuff }
```
Is there a reasonably clear overview of how this works anywhere?
What I have seen so far led me to the vague impression that it
wasn't significant just like attribute ordering.
-- john
How can I tell D that function args are @nogc etc.
Below is a example program that illustrates my issue.
When compiled at run.dlang I get:
```
onlineapp.d(18): Error: `@safe` function
`onlineapp.processSafely!(1, 4).processSafely` cannot call
`@system` function pointer `shouldDo`
onlineapp.d(28): Error: template instance
`onlineapp.processSafely!(1, 4)` error instantiating
```
Why isn't this working? How can I get the effect I want?
Cheers,
-- john
```
bool[7] stagesToProcess = false;
@nogc nothrow @safe bool shouldDoInStages(int index)
{
return stagesToProcess[index];
}
@nogc nothrow @safe bool shouldDoNever(int index)
{
return false;
}
template processSafely(int low, int high)
{
alias ShouldDoFnT = @nogc nothrow @safe bool function(int);
@nogc nothrow @safe uint processSafely(ShouldDoFnT shouldDo)
{
assert(low < high);
uint stepsProcessed;
for (int ii = low; ii <= high; ii++)
{
if (shouldDo(ii))
{
stepsProcessed++;
}
}
return stepsProcessed;
}
}
void main()
{
stagesToProcess = [false, false, true, true, false, true,
false];
uint count = processSafely!(1, 4)();
assert(count == 2);
}
```
Re: Disable wrilten buf in docker
I'm glad you find it helpful! If you have any more questions, whether it's about fashion or anything else, feel free to ask. I'm here to assist you with any information or insights you might need.https://vjackets.com/
Re: Preparing for the New DIP Process
On Sunday, 28 January 2024 at 04:47:30 UTC, FairEnough wrote:
module test;
@safe:
import std;
class C
{
private(this) int x; // intent: other code in this
module cannnot mutate this.
private(this) int y; // intent: other code in this
module cannnot mutate this.
invariant () { assert (x == y); }
void modifyX() {...}
void modifyY() {...}
}
void foo(C c)
{
c.x = 10; // compiler will not compile this code.
c.modifyX();
}
Thank you for posting a very informative example, i think not
just myself but everyone else on this forum had completely forgot
how class private is supposed to work. In spite of the 1000 or so
posts you've made about it.
Keep up the good work!
Re: Preparing for the New DIP Process
On Saturday, 27 January 2024 at 19:58:55 UTC, Jordan Wilson wrote: On Saturday, 27 January 2024 at 10:42:26 UTC, FairEnough wrote: On Saturday, 27 January 2024 at 08:00:32 UTC, Jordan Wilson I believe we are now in the "there is nothing more to be said" territory (just for the record, I think we both agree the feature is good, I just don't think the feature is necessary at all...nice-to-have at best. I suspect we'll agree to disagree). Its probably more useful if you manage a team of barely competent idiot programmers.
Re: Preparing for the New DIP Process
On Friday, 26 January 2024 at 23:41:51 UTC, FairEnough wrote: On Thursday, 25 January 2024 at 00:19:54 UTC, Jordan Wilson wrote: ... That wasn't what was said. What was said was "causing US problems". I.e. on the whole, the lack of class-level privacy does not appear to be causing widespread problems, which implies that it's simply lower on the list of feature requests for most people. Allowing mutable state to escape - the confines of the type in which it has been declared - into the whole of the module, will inevitably lead to a problem. My first use of the D language demonstrated that this statement is factual. The more 'widespread' D is used, will 'likely' also demonstrate the same. What we need to do is find a way to make the computer explode when somebody does that. Weed out the stupid programmers. ;-)
Re: SIGSEGV (Segmentation Fault) upon setting character in char array (object member var)
On Tuesday, 19 December 2023 at 14:01:31 UTC, John Kiro wrote: Thanks Adam. I agree, the behavior associated with the initialization here is confusing (compared for example to a similarly-looking code in Java). Also I don't get why an array of characters would be considered as an immutable array of characters (that is a **string**). I agree this could be a compiler bug, specially that it's not caught by the compiler. I mean: specially that **attempting to update it** is not caught by the compiler.
Re: SIGSEGV (Segmentation Fault) upon setting character in char array (object member var)
Thanks Adam. I agree, the behavior associated with the initialization here is confusing (compared for example to a similarly-looking code in Java). Also I don't get why an array of characters would be considered as an immutable array of characters (that is a **string**). I agree this could be a compiler bug, specially that it's not caught by the compiler.
SIGSEGV (Segmentation Fault) upon setting character in char array (object member var)
Hello there,
First time to experiment with DLang, after a long time.
I'm getting a weird behavior with an **array of chars**, where I
get a segmentation fault upon writing to it (see code and output
below). What makes this problem weird it two things:
1) Why there is no problem with the **int** array (unlike the
**char** array)?
2) Why reading the array element (**charArray[index]**) works,
unlike writing to it?
The problem is gone if I uncomment the constructor code.
Code:
import std.stdio;
void main()
{
(new Test).runit();
}
class Test {
static enum MAX = 10;
uint index = 0;
auto intArray = new int[MAX];
auto charArray = new char[MAX];
this() {
/*
charArray = new char[MAX];
*/
}
void runit() {
debug writefln("IntArray initially: %s", intArray);
intArray[index] = 40; //OK
debug writefln("IntArray becomes: %s", intArray);
debug writefln("Adding char in place of (%c) at index
(%d)..",
charArray[index], index);
charArray[index] = 'a'; //ERROR: segmentation fault
(code -11)!
debug writefln("CharArray becomes %s (PROGRAM ABORTS
BEFORE IT ACTUALLY!)",
charArray);
}
}
Output:
$ dub run
Starting Performing "debug" build using
/home/john/dlang/dmd-2.106.0/linux/bin64/dmd for x86_64.
Building hello-dlang ~master: building configuration
[application]
Linking hello-dlang
Running hello-dlang
IntArray initially: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
IntArray becomes: [40, 0, 0, 0, 0, 0, 0, 0, 0, 0]
Adding char in place of (�) at index (0)..
Error Program exited with code -11
Re: From the D Blog: Crafting Self-Evident Code in D
On Monday, 2 October 2023 at 17:28:19 UTC, Mike Parker wrote: It's been a long, long while since I published anything on the blog. I do intend to get pick it up again down the road, but Walter recently surprised me with plans of his own. He's taken the topic of his DConf '23 talk and derived a blog post from it: https://dlang.org/blog/2023/10/02/crafting-self-evident-code-with-d/ I guess he got impatient with the pace at which I'm getting the talk videos uploaded :-) And for anyone who'd like to engage in any Reddit discussion that comes up: https://www.reddit.com/r/programming/comments/16y2h36/crafting_selfevident_code_in_dlang/ Good talk. Many very clever people would achieve more if they tried to understand why a v. experienced developer would care to spend so much time talking about what might appear to be such basic points. The key challenge: If this stuff was so obvious & everyone did it or it didn't matter so much that they didn't, why would Walter care about it so much?
Re: What's dxml DOMEntity(R) type ?
On Monday, 5 June 2023 at 10:43:27 UTC, Ferhat Kurtulmuş wrote:
On Monday, 5 June 2023 at 10:01:01 UTC, John Xu wrote:
The parseDOM returns a DOMEntity(R) type, how do I write a
xmlRoot as global variable?
I need its detailed type (auto / Variant doesn't work).
import dxml.dom;
?? xmlRoot;
int main() {
string xml = readText("a.xml");
auto dom = parseDOM(xml);
xmlRoot = dom.children[0];
}
```d
import dxml.dom;
import std.stdio;
DOMEntity!string xmlRoot;
int main()
{
string xml = "";
auto dom = parseDOM(xml);
writeln(typeof(dom.children[0]).stringof); // yields
"DOMEntity!string"
xmlRoot = dom.children[0];
return 0;
}
```
Thanks, that's very helpful. D sometimes drives me crazy, screws
up my brain, :-)
What's dxml DOMEntity(R) type ?
The parseDOM returns a DOMEntity(R) type, how do I write a
xmlRoot as global variable?
I need its detailed type (auto / Variant doesn't work).
import dxml.dom;
?? xmlRoot;
int main() {
string xml = readText("a.xml");
auto dom = parseDOM(xml);
xmlRoot = dom.children[0];
}
Re: How get struct value by member name string ?
A correction:
string getTMember(T t, string columnName) {
foreach(member; __traits(allMembers, T)){
if (member == columnName) {
return __traits(getMember, t, member).to!string;
}
}
return "";
}
Re: How get struct value by member name string ?
On Thursday, 1 June 2023 at 15:38:08 UTC, Steven Schveighoffer
wrote:
On 5/31/23 12:08 AM, John Xu wrote:
When render vibe.d diet template,
string[] allMembers = __traits(allMembers, t);
enum allMembers = __traits(allMembers, t);
res.render!("index.dt", t, allMembers)
if I don't want write memberName one by one in diet template:
table
- foreach(memberName; allMembers)
tr
td #{memberName}
td #{getTMember!memberName(t)}
Problem: memberName is not known at compile time.
The problem is that you stored the member name list as a
runtime variable, and that is not known at compile time. Try
the enum.
Or really, just `foreach(memberName; __traits(allMembers, t))`
right in the diet template.
-Steve
Ok, thanks for all you gentlemen's help. I tried following
function,
now it works like C/C++/Python way:
string getTMember(T t, string columnName) {
foreach(member; __traits(allMembers, T)){
if (member == columnName) {
return __traits(getMember, mcu, member).to!string;
}
}
return "";
}
Re: How get struct value by member name string ?
On Tuesday, 30 May 2023 at 15:43:12 UTC, Steven Schveighoffer
wrote:
On 5/30/23 4:46 AM, John Xu wrote:
How to put above enum as a function parameter? Following code
wouldn't work:
string getTMember(T t, enum string memberName) {
return __traits(getMember, t, memberName);
}
compile time parameters come before runtime parameters:
```d
string getTMember(string memberName)(T t) {
return __traits(getMember, t, memberName);
}
// used like
auto v = getTMember!"name"(t);
```
-Steve
When render vibe.d diet template,
string[] allMembers = __traits(allMembers, t);
res.render!("index.dt", t, allMembers)
if I don't want write memberName one by one in diet template:
table
- foreach(memberName; allMembers)
tr
td #{memberName}
td #{getTMember!memberName(t)}
Problem: memberName is not known at compile time.
Re: How get struct value by member name string ?
On Tuesday, 30 May 2023 at 01:33:54 UTC, H. S. Teoh wrote:
On Tue, May 30, 2023 at 01:24:46AM +, John Xu via
Digitalmars-d-learn wrote:
On Monday, 29 May 2023 at 11:21:11 UTC, Adam D Ruppe wrote:
> On Monday, 29 May 2023 at 09:35:11 UTC, John Xu wrote:
> > Error: variable `column` cannot be read at compile time
>
> you should generally getMember on a variable
>
> T t;
> __traits(getMember, t, "name")
>
> like that, that's as if you wrote t.name
It seems I can't use variable as member name:
struct T {int a; string name;}
T t;
string s = "name";
writeln(__traits(getMember, t, s));
Above code fails to compile. Any help?
Short answer:
`s` must be known at compile-time. Or more precisely, known at
the time of template expansion. In this case, use `enum`:
enum s = "name";
Long answer:
https://wiki.dlang.org/Compile-time_vs._compile-time
T
How to put above enum as a function parameter? Following code
wouldn't work:
string getTMember(T t, enum string memberName) {
return __traits(getMember, t, memberName);
}
My database table is very wide, with many columns. Above ddbc
allows a struct
to map db returned data. Then if I want a member's value to show
in vibe.d template,
how do I use a function to get it?
Re: How get struct value by member name string ?
On Monday, 29 May 2023 at 11:21:11 UTC, Adam D Ruppe wrote:
On Monday, 29 May 2023 at 09:35:11 UTC, John Xu wrote:
Error: variable `column` cannot be read at compile time
you should generally getMember on a variable
T t;
__traits(getMember, t, "name")
like that, that's as if you wrote t.name
It seems I can't use variable as member name:
struct T {int a; string name;}
T t;
string s = "name";
writeln(__traits(getMember, t, s));
Above code fails to compile. Any help?
How get struct value by member name string ?
I saw ddbc
(https://github.com/buggins/ddbc/blob/master/source/ddbc/pods.d)
uses
static if (__traits(compiles, (typeof(__traits(getMember, T,
m) {
__traits(getMember, T, m)
}
But for my experience, above code sometimes/somewhere works,
sometimes/somewhere just doesn't:
Error: variable `column` cannot be read at compile time
Is there any friend can explain some more details?
How hide console in dub.sdl under windows 11?
For dmd, I can use a no_console.def file, which has: EXETYPE NT SUBSYSTEM WINDOWS Then `dmd my.d no_console.def` to hide console. But how do I realize it with dub.sdl ? Adding no_console.def to "sourceFiles", doesn't help.
Best way to convert between GBK/GB18030 to utf8 ?
What is the best way to convert a GBK/GB18030 file contents, i.e. read via: std.stdio.read(gbkFile).to!string , to utf8 encoding ?
Re: Can dmd compile a favicon.ico to exe file ?
On Friday, 19 May 2023 at 21:19:07 UTC, Richard (Rikki) Andrew Cattermole wrote: On 19/05/2023 9:39 PM, John Xu wrote: On Thursday, 18 May 2023 at 15:39:05 UTC, Richard (Rikki) Andrew Cattermole wrote: On 19/05/2023 2:19 AM, John Xu wrote: On Monday, 15 May 2023 at 03:54:03 UTC, Richard (Rikki) Andrew Cattermole wrote: That is only for OMF target. You need rc that comes with Visual Studio C++ build tools. Alternatively windres from mingw may work (I haven't tested). How can I add this step to dub.sdl ? You would use one of the build commands and then put the result file name into source files. However you may not want to require it in normal builds (since the file it outputs won't change you can just commit that) just to ensure your build is reproducible. sourceFiles ? or libFiles ? sourceFiles. libFiles is for shared libraries. When I put resource.rc in sourceFiles, dub said, "Error: unrecognized file extension rc"; When I put resource.res in sourceFiles, dub said,"resource.res : fatal error LNK1136: Invalid or damaged file. Error: linker exited with status 1136"
Re: Can dmd compile a favicon.ico to exe file ?
On Thursday, 18 May 2023 at 15:39:05 UTC, Richard (Rikki) Andrew Cattermole wrote: On 19/05/2023 2:19 AM, John Xu wrote: On Monday, 15 May 2023 at 03:54:03 UTC, Richard (Rikki) Andrew Cattermole wrote: That is only for OMF target. You need rc that comes with Visual Studio C++ build tools. Alternatively windres from mingw may work (I haven't tested). How can I add this step to dub.sdl ? You would use one of the build commands and then put the result file name into source files. However you may not want to require it in normal builds (since the file it outputs won't change you can just commit that) just to ensure your build is reproducible. sourceFiles ? or libFiles ?
Re: Can dmd compile a favicon.ico to exe file ?
On Monday, 15 May 2023 at 03:54:03 UTC, Richard (Rikki) Andrew Cattermole wrote: That is only for OMF target. You need rc that comes with Visual Studio C++ build tools. Alternatively windres from mingw may work (I haven't tested). How can I add this step to dub.sdl ?
Re: Where can I find D jobs?
On Saturday, 29 April 2023 at 00:31:21 UTC, Neto wrote: On Saturday, 29 April 2023 at 00:29:28 UTC, Neto wrote: I'm thinking in moving from freelancer to some company, but I'd like to use D. Are there any companies hiring where D is used? note: hire without a degree. and remote. I received emails from turing.com before, about remote jobs. But I never tried their real service.0
Re: Can dmd compile a favicon.ico to exe file ?
On Monday, 15 May 2023 at 02:45:17 UTC, John Xu wrote: Found a related link: https://forum.dlang.org/thread/wogdypudrmrgwjysf...@forum.dlang.org Where Adam D Ruppe informed rcc.exe from http://ftp.digitalmars.com/bup.zip ... Any help? My isp.ico was converted from a png with gimp, used in C# programs before, shouldn't have any problem. Searched bing.com about "Windows 3.0 icon", bing didn't give much info. I figured out that the rcc on ftp.digitalmars.com only supports 8-bit non-compressed icon format. We'll need a newer rcc.exe which can support 24-bit/32-bit/compressed-contents icon format.
Re: Can dmd compile a favicon.ico to exe file ?
Found a related link: https://forum.dlang.org/thread/wogdypudrmrgwjysf...@forum.dlang.org Where Adam D Ruppe informed rcc.exe from http://ftp.digitalmars.com/bup.zip But, I got problem: rcc -r .\resource.rc IDI_ICON1 ICON DISCARDABLE "isp.ico" ^ .\resource.rc(1) : Error: 'isp.ico' doesn't contain a valid Windows 3.0 icon resourc Any help? My isp.ico was converted from a png with gimp, used in C# programs before, shouldn't have any problem. Searched bing.com about "Windows 3.0 icon", bing didn't give much info.
Re: Can dmd compile a favicon.ico to exe file ?
On Friday, 12 May 2023 at 02:09:17 UTC, ryuukk_ wrote: create a ``ressource.rc`` file and paste: ``` IDI_ICON1 ICON DISCARDABLE "myicon.ico" ``` then put your ``mycon.ico`` file next to it ``` my_project\ app.d ressource.rc myicon.ico ``` ``` dmd app.d ressource.rc Thanks for your quick reply. I'll give a try.
Can dmd compile a favicon.ico to exe file ?
I saw c# program's exe, often have an favicon.ico image bound together, which can be dragged to desktop. Can dmd compile an icon image to an exe also?
Re: Any working REPL program on windows? DREPL doesn't compile
On Thursday, 23 March 2023 at 13:27:00 UTC, jmh530 wrote: I've composed a simple gui, partially solved my problem: to compile/test simple codes quickly: https://github.com/xucs007/dln
Re: Getting a total from a user defined variable
On Thursday, 20 April 2023 at 19:41:21 UTC, Joel wrote: // how do I get the total of ages added together? p.map!(x => x.age).sum();
Re: How can a function pointer required to be extern(C)?
On Wednesday, 12 April 2023 at 20:36:59 UTC, H. S. Teoh wrote:
---snip---
extern(C) void* abc(void*) {return null;}
alias FuncPtr = typeof();
You can also express it like this:
```d
extern(C) alias FuncPtr = void* function(void*);
```
Re: mutable pointers as associative array keys
On Monday, 10 April 2023 at 20:31:43 UTC, Steven Schveighoffer wrote: On 4/10/23 4:25 PM, Steven Schveighoffer wrote: It's also completely useless. Having const keys does nothing to guarantee unchanging keys. Another half-assed attempt to be encode correct semantics but fails completely in its goal. In case you wonder how old this is: https://issues.dlang.org/show_bug.cgi?id=11477 https://issues.dlang.org/show_bug.cgi?id=12491#c2 -Steve Oh dear.
mutable pointers as associative array keys
It seems that it isn't possible, am I missing something? alias Q = int[int*]; pragma(msg, Q); // int[const(int)*] Also, is this documented somewhere?
Any working REPL program on windows? DREPL doesn't compile
Anybody know any working REPL program? I failed to find a working one. https://github.com/dlang-community/drepl can't compile on my Windows 10, dub reports: src\drepl\engines\dmd.d(258,16): Error: undefined identifier `dlsym`
How to expand wildchar under dos ?
Under dos, how to get wildchar matched file names? PS E:> dmd a.d PS E:> .\a.exe a.* args=["a.exe", "a.*"] d-glob doesn't function well under windows dos either.
Re: Best way to read/write Chinese (GBK/GB18030) files?
I found this: https://github.com/meatatt/exCode/blob/master/source/excode/package.d There is mention of unicode/GBK conversion, maybe it could be helpful Thanks for quick answers. Now I found I can read both UTF8 and UTF-16LE chinese file: string txt = std.file.read(chineseFile).to!string; and write to UTF8 file: std.file.write(utf8ChineseFile, txt); But still need figure out how to read/write GBK directly.
Best way to read/write Chinese (GBK/GB18030) files?
I'm new to dlang. I didn't find much tutorials on internet about how to read/write Chinese easily. std.encoding doesn't seem to support GBK or GB18030: "Encodings currently supported are UTF-8, UTF-16, UTF-32, ASCII, ISO-8859-1 (also known as LATIN-1), ISO-8859-2 (LATIN-2), WINDOWS-1250, WINDOWS-1251 and WINDOWS-1252." Then what is best way to read GBK/GB18030 contents ? Even GBK/GB18030 file names ?
Re: staticMap but with two arguments
On Thursday, 9 February 2023 at 19:17:55 UTC, Ali Çehreli wrote: I could not figure out eliminating the hard-coded 4. Can we introspect the parameter list of a template like 'fun' in the example? If we could, then we could get 4 that way. Thank you for this. I don't mind hard-coding the N argument. TemplateArgsOf needs an instantiated template but maybe ```enum N = count(fun.stringof, ',') + 1``` is good enough.
Re: staticMap but with two arguments
On Monday, 6 February 2023 at 09:17:07 UTC, Ali Çehreli wrote:
I adapted staticMap's implementation to two sets of arguments:
So I've got this implementation, but wonder if I can generalise
the arg splitting portion rather than write it manually for each
N?
```d
template staticMapN(size_t N, alias fun, args...) if (args.length
% N == 0) {
alias staticMapN = AliasSeq!();
static foreach (i; 0 .. args.length / N)
static if (N == 1)
staticMapN = AliasSeq!(staticMapN, fun!(args));
else static if (N == 2)
staticMapN = AliasSeq!(staticMapN, fun!(args[0 .. $ /
N][i], args[$ / N .. ($ / N) * 2][i]));
else static if (N == 3)
staticMapN = AliasSeq!(staticMapN, fun!(args[0 .. $ /
N][i], args[$ / N .. ($ / N) * 2][i], args[($ / N) * 2 .. ($ / N)
* 3][i]));
// etc
}
```
Re: staticMap but with two arguments
On Monday, 6 February 2023 at 09:17:07 UTC, Ali Çehreli wrote: I adapted staticMap's implementation to two sets of arguments: Thanks Ali, that's perfect. I thought of splitting the args in half a few hours later but hadn't got around to trying it.
staticMap but with two arguments
I have two AliasSeqs: one containing a function's parameters
(SourceSeq), the other containing the types I want to convert
said parameters to (TargetSeq). I'd use something like staticMap
to call the conversion function with both a parameter from
SourceSeq and a type from TargetSeq, and return an AliasSeq of
converted values which will be forwarded to another function.
staticMap's "fun" can only be instantiated with a single
argument, while I need it to work with two.
E.g.:
```
template toTarget(alias source, Target) {
static if (is(typeof(source) == int) && is(Target == string))
// for example, convert int to string
}
alias TargetSeq = Parameters!targetFunc;
auto wrapperFunc(A...)(A) {
alias SourceSeq = __traits(parameters);
return targetFunc(staticMap!(toTarget, SourceSeq)); // How
would I call staticMap (or something similar) with SourceSeq
*and* TargetSeq?
}
```
I could build the list of converted values manually but I wanted
something smart (like staticMap) to do it inline. I thought
ApplyLeft/Right could help but couldn't get my head around it.
Re: Mixin helper help
On Friday, 13 January 2023 at 14:32:44 UTC, Salih Dincer wrote: Why not directly use the mixin template for opDispatch()? My opDispatch generates code based on the arguments passed, interpolating variable names and functions based on the type. I wanted to remove the double braces in my static foreach (needed as I declared some aliases inside but since it creates a scope those new variables can't be referred to outside of it). I saw Adam's post here http://dpldocs.info/this-week-in-d/Blog.Posted_2022_12_26.html showing use of a "helper" template, and I was trying to adapt it. I've since just dropped the double braces and removed the aliases. It's not as clean but works.
Mixin helper help
I'm obviously doing something wrong, but don't quite understand.
```d
mixin template helper() {
mixin("writeln(12);");
}
struct Foo {
void opDispatch(string name)() {
import std.stdio;
mixin helper!();
//mixin("writeln(12);");
}
}
void main() {
Foo.init.opDispatch!"bar"();
}
```
The compiler emits these errors about the mixin ("writeln(12);"):
unexpected `(` in declarator
basic type expected, not `12`
found `12` when expecting `)`
no identifier for declarator `writeln(_error_)`
semicolon expected following function declaration
declaration expected, not `)`
Why does the commented code work but the mixin not? Thanks for
any pointers.
Re: text based file formats
On Wednesday, 21 December 2022 at 04:19:46 UTC, 9il wrote: On Tuesday, 20 December 2022 at 19:46:36 UTC, John Colvin wrote: On Tuesday, 20 December 2022 at 00:40:07 UTC, H. S. Teoh wrote: [...] We use this at work with some light tweaks, it’s done a lot work It has already been replaced with [mir.csv](https://github.com/libmir/mir-ion/blob/master/source/mir/csv.d). Mir is faster, SIMD accelerated, and supports numbers and timestamp recognition. Hah, so it has! Well anyway, it did do a lot of hard work for us for a long time, so thanks :)
Re: text based file formats
On Tuesday, 20 December 2022 at 00:40:07 UTC, H. S. Teoh wrote: On Mon, Dec 19, 2022 at 04:16:57PM -0800, Walter Bright via Digitalmars-d-announce wrote: On 12/19/2022 4:35 AM, Adam D Ruppe wrote: > On Monday, 19 December 2022 at 09:55:47 UTC, Walter Bright > wrote: > > Curious why CSV isn't in the list. > > Maybe std.csv is already good enough? LOL, learn something every day! I've even written my own, but it isn't very good. There's also my little experimental csv parser that was designed to be as fast as possible: https://github.com/quickfur/fastcsv However it can only handle input that fits in memory (using std.mmfile is one possible workaround), has a static limit on field sizes, and does not do validation. T We use this at work with some light tweaks, it’s done a lot work
Re: Beerconf October 2022
On Sunday, 30 October 2022 at 01:50:33 UTC, Steven Schveighoffer wrote: On 10/29/22 2:00 PM, FeepingCreature wrote: On Saturday, 29 October 2022 at 10:14:31 UTC, rikki cattermole wrote: And now for some good news! Its almost Halloween, so grab your candy and any spooky brews you may have, and join us for a ghostly chat! https://meet.jit.si/Dlang2022OctoberBeerConf I wish you'd announce the time a bit in advance. :) I don't want to announce a time, because I don't know what time it can be started. I'm in the US, so I'm usually asleep when it's started. But I do try to announce 2 weeks before and then 2 days before. -Steve Quiet here, I’m around for a couple of hours, come say hi!
Re: How to add struct definition?
On Friday, 9 September 2022 at 00:16:01 UTC, Injeckt wrote: I need to add this struct definition in my project. But how to do that? This structure: https://docs.microsoft.com/en-us/windows/win32/api/iptypes/ns-iptypes-ip_adapter_info It's defined in DRuntime, so you can just import the module like this: import core.sys.windows.iptypes;
Re: Symmetry looking for D programmers in Singapore/Hong Kong/Australia/New Zealand
On Wednesday, 16 June 2021 at 17:13:35 UTC, russhy wrote: For what kind of project? need more info It might help to look at https://jobs.symmetryinvestments.dev/ and https://github.com/symmetryinvestments/
Re: From the D Blog -- Interfacing D with C: Strings Part One
On Monday, 24 May 2021 at 16:16:53 UTC, Steven Schveighoffer
wrote:
On 5/24/21 10:02 AM, Mike Parker wrote:
The latest post in the D and C series dives into the weeds of
D and C strings: how they're implemented, when you need to
NUL-terminate your D strings and when you don't, and how the
storage of literals in memory allows you to avoid NUL
termination in one case you might not have considered and
another case that you shouldn't rely on but can in practice
with the current compilers.
There are at least two more posts worth of information to go
into on this topic, but everything in this post is enough to
cover many use cases of D to C string interop.
The blog:
https://dlang.org/blog/2021/05/24/interfacing-d-with-c-strings-part-one/
Reddit:
https://www.reddit.com/r/programming/comments/njyf76/interfacing_d_with_c_strings_part_one/
Nice article!
Note that there is a huge pitfall awaiting you if you use
`toStringz`: garbage collection. You may want to amend the
article to identify this pitfall.
And I'm not talking about requiring `@nogc`, I'm talking about
the GC collecting the data while C is still using it.
In your example:
```d
puts(s1.toStringz());
```
This leaves a GC-collectible allocation in C land. For `puts`,
it's fine, as the data is not used past the call, but in
something else that might keep it somewhere not accessible to
the GC, you'll want to assign that to a variable that lasts as
long as the resource is used.
-Steve
It’s worse than that, no? If the only reference to GC data isn’t
on the stack of a tracked thread, in GC allocated memory or in a
tracked root then it can be freed. Even in D:
void foo(int* a) {
int** b = cast(int**) malloc((int*).sizeof);
*b = a;
a = null;
GC.collect();
**b = 4; // whoops!!
}
foo(new int);
Right? Obviously that collection could be from calling another
function (e.g. a callback from C to D code) or from another
thread. Or am I missing something?
Re: Are there any containers that go with allocators?
On Tuesday, 9 February 2021 at 12:23:52 UTC, rikki cattermole wrote: https://github.com/dlang-community/containers It uses the older design for allocators (dependency). Looks good, thank you
Are there any containers that go with allocators?
Normally I'm happy with the GC containers in D, they work well and suit my use. I have a few uses that would benefit from allocation in memory arenas or local stack based allocation. Looks like std.experimental has allocators for those use cases. But I can't find any containers to make use of those allocators. The built in ones use GC managed memory, there are std.container but they appear to use malloc/free which again is useful but not what I'm looking for. I'd like resizeable arrays, hashmaps and strings that I can allocate using an allocator? Am I missing something in the standard library, or a way to use the existing ones, or is it just that nobody has implemented this kind of thing yet?
Re: DIP 1034--Add a Bottom Type (reboot)--Formal Assessment Begins
On Wednesday, 3 February 2021 at 18:24:06 UTC, Imperatorn wrote: Is there a short explanation of why this was done and what it enables? Personally I'm excited to see this... Strangely enough there is a long running 'net wide disagreement on what an assert is or does. Some regard it as purely a debugging tool used as a programmer aid that is expressly turned on by the programmer, and others (such as myself) regard it as a way of stating, and enforcing the contract, provided by an API. And as such, people with the latter mindset wish the compiler would warn us if that contract is potentially violated on any path, and conversely, wish the optimizer to act on the information it provides. By adding it to the type system, it expresses and clarifies the intent of the author of the code, and expresses it in the compilers terms, ie. a type. In my day job, I have found the only resolution to the disagreement is to create two different facilities with two different names to permit the two groups of humans to get along. In my day job instead of "assert" we now have "log_If()" that are opt-in programmer debugging tools and "error_Check...()" that enforce.
Re: Printing shortest decimal form of floating point number with Mir
On Monday, 4 January 2021 at 17:22:55 UTC, John Colvin wrote:
On Monday, 4 January 2021 at 13:47:17 UTC, Ola Fosheim Grøstad
wrote:
[...]
I have a longer reply I'm trying to write, but just to make
sure I'm on the right track:
template Foo(T) {
alias Foo = T;
}
template Q(A : Foo!T, T) {
pragma(msg, A.stringof, " ", T.stringof);
}
alias X = Q!(Foo!int);
in your opinion, this should compile and msg `int int`, yes?
I'm trying to make a really concise example without using IFTI.
and presumably the same for
alias X = Q!(int);
yes?
Re: Printing shortest decimal form of floating point number with Mir
On Monday, 4 January 2021 at 13:47:17 UTC, Ola Fosheim Grøstad
wrote:
On Monday, 4 January 2021 at 12:35:12 UTC, John Colvin wrote:
What's the simplest example that doesn't work and is that
simple example just indirection through an alias or is it
actually indirection through a template that *when
instantiated* turns out to be just an alias?
Indirection through a parametric alias. This is the simplest I
have come up with so far:
struct Foo(T) {}
alias Bar(T) = Foo!T;
void f(T)(Bar!T x) {}
void main() {
f(Bar!int());
}
I created a thread for it:
https://forum.dlang.org/post/nxrfrizqdmhzhivxp...@forum.dlang.org
I have a suspicion that what you're asking for here is the
type-inference to have x-ray vision in to uninstantiated
templates that works for a few simple cases. Am I wrong?
No, just substitute: "Bar!int" with "Foo!int".
To be clear, a really useful special case can be really useful
and worthwhile, but I'm not convinced this is the principled
"type system bug" you are saying it is.
Why are you not convinced?
An alias is a short hand. If it is possible to discriminate by
the alias and the actual object then that it a semantic problem.
I have a longer reply I'm trying to write, but just to make sure
I'm on the right track:
template Foo(T) {
alias Foo = T;
}
template Q(A : Foo!T, T) {
pragma(msg, A.stringof, " ", T.stringof);
}
alias X = Q!(Foo!int);
in your opinion, this should compile and msg `int int`, yes?
I'm trying to make a really concise example without using IFTI.
Re: Printing shortest decimal form of floating point number with Mir
On Monday, 4 January 2021 at 09:21:02 UTC, Ola Fosheim Grøstad
wrote:
On Monday, 4 January 2021 at 09:18:50 UTC, Ola Fosheim Grøstad
wrote:
On Monday, 4 January 2021 at 05:55:37 UTC, Ola Fosheim Grostad
wrote:
On Monday, 4 January 2021 at 04:37:22 UTC, 9il wrote:
I suppose the answer would be that D doesn't pretend to
support all C++ template features and the bug is not a bug
because we live with this somehow for years.
But it is a bug even if there was no C++... An alias should
work by simple substitution, if it does not, then it is no
alias...
Here is an even simpler example that does not work:
struct Foo(T){}
void foo(T)(T!int x) {}
alias FooInt = Foo!int;
void main() {
foo(FooInt());
}
Oh, now wait, it does:
struct Foo(T){}
void foo(alias T)(T!int x) {}
alias FooInt = Foo!int;
void main() {
foo(FooInt());
}
My mistake.
What's the simplest example that doesn't work and is that simple
example just indirection through an alias or is it actually
indirection through a template that *when instantiated* turns out
to be just an alias?
I have a suspicion that what you're asking for here is the
type-inference to have x-ray vision in to uninstantiated
templates that works for a few simple cases. Am I wrong?
To be clear, a really useful special case can be really useful
and worthwhile, but I'm not convinced this is the principled
"type system bug" you are saying it is.
Re: Printing shortest decimal form of floating point number with Mir
On Thursday, 24 December 2020 at 14:14:33 UTC, 9il wrote: On Thursday, 24 December 2020 at 14:08:32 UTC, welkam wrote: On Wednesday, 23 December 2020 at 18:05:40 UTC, 9il wrote: It was a mockery executed by Atila Read the all comments and didnt saw any mockery Yes, it wasn't explicit. He didn't write bad words, he did a bad decision. Bad for D. Big difference between bad decision and mockery. It's very possible he was wrong, but I don't think he wasn't taking it seriously.
Re: MIR vs. Numpy
On Wednesday, 18 November 2020 at 13:01:42 UTC, Bastiaan Veelo wrote: On Wednesday, 18 November 2020 at 10:05:06 UTC, Tobias Schmidt wrote: Dear all, to compare MIR and Numpy in the HPC context, we implemented a multigrid solver in Python using Numpy and in D using Mir and perforemd some benchmarks with them. You can find our code and results here: https://github.com/typohnebild/numpy-vs-mir Nice numbers. I’m not a Python guy but I was under the impression that Numpy actually is written in C, so that when you benchmark Numpy you’re mostly benchmarking C, not Python. Therefore I had expected the Numpy performance to be much closer to D’s. An important factor I think, which I’m not sure you have discussed (didn’t look too closely), is the compiler backend that was used to compile D and Numpy. Then again, as a user one is mostly interested in the out-of-the-box performance, which this seems to be a good measure of. — Bastiaan. A lot of numpy is in C, C++, fortran, asm etc But when you chain a bunch of things together, you are going via python. The language boundary (and python being slow) means that internal iteration in native code is a requirement for performance, which leads to eager allocation for composability via python, which then hurts performance. Numpy makes a very good effort, but is always constrained by this. Clever schemes with laziness where operations in python are actually just composing operations for execution later/on-demand can work as an alternative, but a) that's hard and b) even if you can completely avoid calling back in to python during iteration you would still need JIT to really unlock the performance. Julia fixes this by having all/most in one language which is JIT'd D can do the same with templates AOT, like C++/Eigen does but more flexible and less terrifying code. That's (one part of) what mir provides.
Highlight general point about software dev and design in general.
On Tuesday, 20 October 2020 at 21:58:16 UTC, Johan Engelen wrote:
On Tuesday, 20 October 2020 at 20:21:56 UTC, aberba wrote:
On Tuesday, 20 October 2020 at 17:36:11 UTC, kinke wrote:
On Tuesday, 20 October 2020 at 16:08:47 UTC, aberba wrote:
It's an option but doesn't fill the need for an installer.
Not sure why its hasn't been done.
See https://github.com/ldc-developers/ldc/issues/1754.
From the discussions, it seems you still don't see the value
of an installer...backing it with the idea that LDC is for
"developers". I'm a developer myself and I use installers all
the time when on Windows...there are very few people I
personally know who would go for an archive file to set it up
themselves.
So not everyone is like you. The reason why I personally go
for DMD over LDC is convenience (especially when introducing D
to newbies)...even though LDC is more optimized for
performance.
Unless what you guys are doing is an artificial barrier to get
others to not use it.
Guys, all points have been made, there is no wrong and right
here, let's stop arguing over this.
What is needed is someone who thinks it is useful to have an
exe installer and wants to do the work. It cannot be done by
someone who thinks it is not useful, because there are
decisions to be made (like which folder to install it in,
whether to overwrite old or not), that can only be made by
someone who actually cares about it. There is no point in
trying to convince kinke or me.
I'm sure noone will be against uploading the installer exe onto
github release page once it's been made and checked.
-Johan
Johan hits an important nail right on the head here.
While it is possible to design for others who are unlike you,
it's much harder than designing for yourself or those who have
similar values and priorities w.r.t. the thing in question. A lot
of talk about "we (and by we I mean you) should do this thing I
think is important" isn't pushing in the most productive
direction, because
_*_*_{
even if one becomes convinced that there is value in something,
that does not mean one has the relevant understanding necessary
for good design of that thing
}_*_*_
Either the person with the problem works on understanding the
tools to fix the problem, or the person with the tools works on
understanding the problem. When values and "user experience" and
"ease of use" are in play, I think the latter usually gets harder
than normal, because understanding what will be easy or pleasing
for others who are unlike us is not something everyone is good
at.* This shifts the balance towards preferring the former
approach where the person with the problem works towards doing at
least a significant part of the design.** There will always be
other considerations of course, this is just one force out of
many.
This is not to say that developers shouldn't be thoughtful about
their users - they definitely should be - but that doing a good
job of that when the users are unlike the developer is _hard_.
* Perhaps in practice that ability is negatively associated with
a strong sense of personal taste, e.g. great musicians writing
the music _they_ want, not trying to specifically please people;
the magic isn't that they understand other people, it's that
their particular tastes resonate with others strongly. Maybe
truly great mass-market businesses come from people who both have
that magic _and_ a strong ability to experience their work from
other's perspectives, the combination being rare and the ability
to integrate the two effectively being even rarer (Steve Jobs
comes to mind).
** Design and implementation often don't separate very cleanly in
practice, so this probably means implementing it too, at least to
proof-of-concept quality.
Re: winapi, dll
On Thursday, 15 October 2020 at 20:13:37 UTC, Atmosfear wrote:
On Thursday, 15 October 2020 at 16:32:06 UTC, Imperatorn wrote:
On Thursday, 15 October 2020 at 12:45:42 UTC, Atmosfear wrote:
I didn't find how to call the queryperformancecounter
function. I tried this. Returns errors, doesn't know what
BOOL and LARGE_INTEGER are.
import core.sys.windows.windows;
import core.sys.windows.w32api;
import core.sys.windows.winbase;
pragma(lib, "kernel32");
extern (Windows)
{
BOOL QueryPerformanceCounter(LARGE_INTEGER
*lpPerformanceCount);
}
void main()
{}
It's already defined. Just use QueryPerformanceCounter, (no
extern).
I'm a newby. Can you show me an example? In which module is it?
Just import core.sys.windows.windows and call the function like
so:
---
import core.sys.windows.windows;
void main() {
LARGE_INTEGER pc;
QueryPerformanceCounter();
}
---
Re: I need "windowsx.d" Someone can send It to me?
On Friday, 25 September 2020 at 15:03:56 UTC, Marcone wrote: I need windowsx.d but for I don't know the reason is not in dmd. Someone that have it can send to me? I don't know convert windowsx.h to windowsx.d windowsx.h is mostly a bunch of macros that forward to functions elsewhere in the SDK. Yes, it's handy, but you can get by without it in case you don't manage to get it translated to D. Open windowsx.h in your editor, find the macro you want to use, look across to the right to see what the macro expands to, and use that in your code instead. A lot of the macros that simply cast between HBITMAP, HPALETTE, HFONT, HPEN, HGDIOBJ etc are redundant because in D they're all just aliases for void*.
Re: Beta 2.094.0
On Friday, 18 September 2020 at 13:35:34 UTC, Jacob Carlborg wrote: On 2020-09-17 12:10, John Colvin wrote: I personally think it's not so bad as long as the commit gets written to the dub.selections.json It doesn't. I know. But it should be. But then again a lot of things “should be” with dub.
Re: Beta 2.094.0
On Wednesday, 16 September 2020 at 18:52:23 UTC, Jacob Carlborg wrote: On 2020-09-16 19:20, mw wrote: Why it's deprecated? can we revive it? It was deprecated because it's a bad idea to not lock versions. Using `~master` would fetch the latest code from the "master" branch when compiling. You never know which version you get. You don't get reproducible builds. I personally think it's not so bad as long as the commit gets written to the dub.selections.json
Re: Access violation when using IShellFolder2
On Thursday, 10 September 2020 at 13:30:15 UTC, FreeSlave wrote: Thanks. I tried this, but VarDateFromStr does not succeed for me. It turns out the shell embeds some control characters in the string, specifically 8206 and 8207. So remove those before passing it to VarDateFromStr. auto temp = strRet.pOleStr[0 .. lstrlenW(strRet.pOleStr)] .replace(cast(wchar)8206, "") .replace(cast(wchar)8207, ""); DATE date; VarDateFromStr((temp ~ '\0').ptr, LOCALE_USER_DEFAULT, 0, );
Re: Access violation when using IShellFolder2
On Wednesday, 9 September 2020 at 22:44:50 UTC, FreeSlave wrote: Btw do you know how to parse a date returned by GetDetailsOf? Couldn't find any examples in C++. I actually can see digits representing date and time as a part of the string, but I would prefer to use some winapi function to translate it into some time type instead of manually parsing the result. You could look at passing the str.pOleStr field in the SHELLDETAILS you got from GetDetailsOf to VarDateFromStr. It will give you a DATE value that VariantTimeToSystemTime will convert to a SYSTEMTIME from which you can get the years, months, days etc. For example: SHELLDETAILS details; GetDetailsOf(pidl, 3, ); DATE date; VarDateFromStr(details.str.pOleStr, LOCALE_USER_DEFAULT, 0, ); SYSTEMTIME st; VariantTimeToSystemTime(date, ); auto year = st.wYear; auto month = st.wMonth; You can convert that into a more D-friendly SysTime object using SYSTEMTIMEToSysTime from the std.datetime package.
Re: Access violation when using IShellFolder2
On Tuesday, 8 September 2020 at 22:24:22 UTC, FreeSlave wrote:
However if I change the type of recycleBin variable to
IShellFolder (not IShellFolder2), the crash does not happen.
Does IShellFolder2 require some special handling?
The issue is caused by druntime's definition of IShellFolder2. To
fix it temporarily, just redefine it in your module somewhere:
interface IShellFolder2 : IShellFolder {
HRESULT GetDefaultSearchGUID(GUID*);
HRESULT EnumSearches(IEnumExtraSearch*);
HRESULT GetDefaultColumn(DWORD, ULONG*, ULONG*);
HRESULT GetDefaultColumnState(UINT, SHCOLSTATEF*);
HRESULT GetDetailsEx(LPCITEMIDLIST, const(SHCOLUMNID)*,
VARIANT*);
HRESULT GetDetailsOf(LPCITEMIDLIST, UINT, SHELLDETAILS*);
HRESULT MapColumnToSCID(UINT, SHCOLUMNID*);
}
IShellFolder2 isn't the only culprit - IShellView2 will need
fixing too if you intend to use it. There are probably others as
well.
Re: Contributing to D wiki
On Monday, 27 July 2020 at 16:58:13 UTC, H. S. Teoh wrote: On Mon, Jul 27, 2020 at 11:39:32AM +, John Burton via Digitalmars-d-learn wrote: [...] I tried looking there for information and examples of getting glfw3 statically linked into my program using LDC and didn't really find anything. I wonder if adding a page for static linking tips would be useful as it seems to be problematic and compiler and environment dependent? Perhaps I should go ahead and see if I can make a page and see if anyone objects :P Yes, please go ahead. I don't think there's a need to ask. :-) T I will try to add something in the coming days
Re: Contributing to D wiki
On Wednesday, 15 July 2020 at 22:18:47 UTC, H. S. Teoh wrote: On Wed, Jul 15, 2020 at 09:27:22PM +, tastyminerals via Digitalmars-d-learn wrote: [...] D wiki is badly outdated. This is not a fact but a gut feeling after reading through some of its pages. I was wondering who's owning it myself but never actually dared to just go and update. Why not? It's a *wiki*. Wikis are intended for the user community (i.e. you & me) to go and edit. That's the whole point of a wiki. If that wasn't the intention we wouldn't have set up a wiki in the first place. I tried looking there for information and examples of getting glfw3 statically linked into my program using LDC and didn't really find anything. I wonder if adding a page for static linking tips would be useful as it seems to be problematic and compiler and environment dependent? Perhaps I should go ahead and see if I can make a page and see if anyone objects :P
Re: Static link of glfw3 library fails for me
On Monday, 27 July 2020 at 08:53:25 UTC, Mike Parker wrote: On Monday, 27 July 2020 at 07:30:42 UTC, John Burton wrote: For reference I got this to work by doing the following :- 1) Installed visual studio build tools. I could not get this to work at all with the linker etc that comes with ldc2. 2) Copied the glfw3.lib vs2019 version file into my build directory (obviously could point the linker at it too which would be better) 3) Used the following dub.sdl name "game" description "Test Project" authors "Me" copyright "Copyright ┬® 2020, Me" license "proprietary" dependency "bindbc-glfw" version="~>0.10.0" dflags "-mscrtlib=ucrt" libs "glfw3" versions "BindGLFW_Static" The key seems to be using the dflags line to make it link with the "modern" C libraries, and using the microsoft linker. I appear to have glfw3 statically linked and working :) Cool. To be clear, you're still compiling with LDC, correct? I'm pretty sure DMD is using the universal C runtime out of the box when VS is installed. yes compiling with LDC (Installed via "scoop" (see https://scoop.sh) but I don't think that matter where it came from). I got it previously to work with DMD with no issue, my issue was with LDC only. I was using DMD for my project previously but started doing something where performance mattered so thought to use LDC instead.
Re: Static link of glfw3 library fails for me
On Sunday, 26 July 2020 at 12:24:06 UTC, John Burton wrote: On Sunday, 26 July 2020 at 10:41:27 UTC, Mike Parker wrote: On Sunday, 26 July 2020 at 08:28:29 UTC, John Burton wrote: And I get the following errors from the link :- lld-link: error: undefined symbol: __GSHandlerCheck lld-link: error: undefined symbol: __security_check_cookie lld-link: error: undefined symbol: __security_cookie I believe that's because the GLFW library was compiled with the Microsoft compiler's /GS option: For reference I got this to work by doing the following :- 1) Installed visual studio build tools. I could not get this to work at all with the linker etc that comes with ldc2. 2) Copied the glfw3.lib vs2019 version file into my build directory (obviously could point the linker at it too which would be better) 3) Used the following dub.sdl name "game" description "Test Project" authors "Me" copyright "Copyright ┬® 2020, Me" license "proprietary" dependency "bindbc-glfw" version="~>0.10.0" dflags "-mscrtlib=ucrt" libs "glfw3" versions "BindGLFW_Static" The key seems to be using the dflags line to make it link with the "modern" C libraries, and using the microsoft linker. I appear to have glfw3 statically linked and working :)
Re: Static link of glfw3 library fails for me
On Sunday, 26 July 2020 at 10:41:27 UTC, Mike Parker wrote: On Sunday, 26 July 2020 at 08:28:29 UTC, John Burton wrote: And I get the following errors from the link :- lld-link: error: undefined symbol: __GSHandlerCheck lld-link: error: undefined symbol: __security_check_cookie lld-link: error: undefined symbol: __security_cookie I believe that's because the GLFW library was compiled with the Microsoft compiler's /GS option: https://docs.microsoft.com/en-us/cpp/build/reference/gs-buffer-security-check?view=vs-2019 The __security_* functions are MS extensions to the C standard library. A quick search suggests you should try linking with bufferoverflowU.lib. Either that or compile GLFW with /GS- to turn off the security checks. This is one reason I gave on on static linking pre-built C binaries long ago. I use the static bindings with import libraries, but I don't touch static libs unless I compile them myself. Thank you. I'll look into this. I wanted a single statically linked binary for an application I had in mind so thought I'd try this out. It's nice just to be able to send a single binary without needing to have an installer or copy multiple files for some use cases. This is the main reason I quite like go, not so much for the language but that things like "gitea" can be just one single binary and nothing else. I can rebuild glfw I guess, that's not a problem (but makes it harder for people if I want to share my code of course). Perhaps I ought to try this. I understand, as mentioned in your other reply, that I'll have to link with all the other dependencies of glfw too. I oversimplified my example a bit too much :)
Static link of glfw3 library fails for me
I'm trying to replicate a program I make in C++ using D. I am using the ldc2 compiler and want to *static* link in the glfw library. Following the docs I have an dub.sdl file that looks like the one below. The library I'm linking with is the vs2019 one from the GLFW zip file from their website. My program isn't work showing, it just calls glfwInit, creates a windows, and does a basic event loop. (This is a simplified test made when I couldn't get my real program to link) However I get link errors shown below. Am I doing this wrong? Am I using the wrong library to link with? (And if so which should I use). Am I missing any options etc? Or will this just not work with ldc2? Thanks for any help! My dub.sdl file looks like this :- name "game" description "Test Project" authors "Me" copyright "Copyright © 2020, Me" license "proprietary" dependency "bindbc-glfw" version="~>0.10.0" versions "BindGLFW_Static" libs "glfw3" lflags "-L..\\work\\3rdparty\\lib" And I get the following errors from the link :- lld-link: error: undefined symbol: __GSHandlerCheck lld-link: error: undefined symbol: __security_check_cookie lld-link: error: undefined symbol: __security_cookie
Re: Decimal string to floating point conversion with correct half-to-even rounding
On Tuesday, 7 July 2020 at 15:08:33 UTC, Adam D. Ruppe wrote: On Tuesday, 7 July 2020 at 13:00:04 UTC, Steven Schveighoffer wrote: Doing that these days would be silly. You can depend on a specific version of a repository without problems. I always have problems when trying to do that. git submodules bring pretty consistent pain in my experience. But it probably isn't so bad if the submodule rarely changes. Just for 100% control anyway nothing beats copy/paste. Then there's zero difference between you writing it yourself. I kinda wish the D upstream were more willing to do that. My view is it shouldn't be on independent developers to add stuff to Phobos, for example, instead the Phobos team should just be copying and testing modules they are interested in on their own. git subtree it's like submodules but also like copy-paste.
Re: final switch problem
On Saturday, 13 June 2020 at 15:33:55 UTC, Boris Carvajal wrote: On Saturday, 13 June 2020 at 09:02:21 UTC, John Chapman wrote: Is this a bug or have I made a mistake? This worked a few days ago and I haven't changed my setup since then. https://issues.dlang.org/show_bug.cgi?id=19548 Your code triggers it by using "-debug" option on https://run.dlang.io/ using DMD Hmm, compiling with -release makes it work. Not a huge issue, I'll just avoid final switches in debug mode until it's fixed. Thanks.
final switch problem
If I use a final switch and import std.uni (or any other module
that imports it, such as std.string), I'm getting unresolved
external symbol errors with DMD 2.092.
This code triggers the issue:
---
module test;
import std.uni;
enum Cheese { cheddar, edam }
void test(Cheese cheese) {
final switch (cheese) {
case Cheese.cheddar: break;
case Cheese.edam: break;
}
}
void main() {
test(Cheese.cheddar);
}
---
error LNK2019: unresolved external symbol "pure nothrow @nogc
@safe void
core.internal.switch_.__switch_error!().__switch_error(immutable(char)[], ulong)" (_D4core8internal7switch___T14__switch_errorZQrFNaNbNiNfAyamZv) referenced in function _Dmain
If I remove "final" and add a default case, it compiles fine. Is
this a bug or have I made a mistake? This worked a few days ago
and I haven't changed my setup since then.
Re: Rationale for accepting DIP 1028 as is
On Wednesday, 27 May 2020 at 05:49:49 UTC, Walter Bright wrote: On 5/26/2020 9:31 AM, Bruce Carneal wrote: Currently a machine checked @safe function calling an unannotated extern C routine will error out during compilation. This is great as the C routine was not machine checked, and generally can not be checked. Post 1028, IIUC, the compilation will go through without complaint. This seems quite clear. What am I missing? Nothing at all. But I doubt there is much legacy non-compiling code around. The point isn't that incorrect legacy code that didn't compile now does (although that does matter a bit), it's that newly written code will compile when it shouldn't. Existing code will be full of extern(C) declarations that are implicitly and correctly @system now and will become @safe with dip1028, which means that when I write new @safe code calling those (could be through a deep dependency chain of inferred-@safety APIs, multiple dub packages...) I could easily find my new code compiling when it shouldn't. Effectively, by silently @safe-ing things you can't infer, you will be changing APIs from @system to @trusted without any checks. Just in case there's any confusion, here's a timeline: 1. library A is written containing a dangerous but useful extern(C) declaration assuming @system by default. 2. application B is written for and compiled with dip1028, @safe: at the top of every file. 3. B adds a dependency on A. It continues to compile as @safe, calling an unsafe C function. This seems like one of those things where it's either wrong or a showstopper.
Re: How to get the pointer of "this" ?
On Tuesday, 26 May 2020 at 13:37:22 UTC, Vinod K Chandran wrote:
On Tuesday, 26 May 2020 at 12:41:20 UTC, John Chapman wrote:
On Monday, 25 May 2020 at 16:26:31 UTC, Vinod K Chandran wrote:
Here is my full code. Please take a look.
https://pastebin.com/av3nrvtT
Change line 124 to:
SetWindowSubclass(this.mHandle, SUBCLASSPROC(),
UINT_PTR(subClsID), cast(DWORD_PTR)cast(void*)this);
That is, change `` to `cast(void*)this`.
Hi,
Thanks for the reply. That will work like charm but we need to
change the code in subclassed button's WndProc like this--
extern(Windows)
private LRESULT btnWndProc(HWND hWnd, UINT message, WPARAM
wParam, LPARAM lParam, UINT_PTR scID, DWORD_PTR refData) {
try {
Button thisBtn = cast(Button)cast(void*)refData;
{
catch (Exception e) {}
Yes, that should work.
Re: How to get the pointer of "this" ?
On Monday, 25 May 2020 at 16:26:31 UTC, Vinod K Chandran wrote: Here is my full code. Please take a look. https://pastebin.com/av3nrvtT Change line 124 to: SetWindowSubclass(this.mHandle, SUBCLASSPROC(), UINT_PTR(subClsID), cast(DWORD_PTR)cast(void*)this); That is, change `` to `cast(void*)this`.
Re: How to get the pointer of "this" ?
On Monday, 25 May 2020 at 16:39:30 UTC, Mike Parker wrote: On Monday, 25 May 2020 at 08:39:23 UTC, John Burton wrote: I believe that in D *this* is a reference to the object and not a pointer like in C++. So I think that writing might be what you need? No. A class reference is a pointer under the hood. Getting its address will result in a pointer to the reference variable itself, not to the class instance. When passing a reference to a C API, casting it directly to the C type is correct. Ah I see. In that case I have some code I need to investigate as it's probably only working by accident!
Re: How to get the pointer of "this" ?
On Sunday, 24 May 2020 at 17:40:10 UTC, bauss wrote: On Sunday, 24 May 2020 at 17:05:16 UTC, Vinod K Chandran wrote: [...] I think your issue might be elsewhere because casting this should be fine and it should not complain about that in your given code. At least you should be able to pass this to another function or even cast it. Please show the full code and the full error which gives you the stacktrace of where it's called and from where. I believe that in D *this* is a reference to the object and not a pointer like in C++. So I think that writing might be what you need?
Overload function template for rectangular array
Is it possible to overload a function template for rectangular
arrays? Is there any way to tell them apart from normal ones?
void foo(T)(T[] a) {}
void foo(T)(T[][] a) {}
auto ra = new int[][](5, 5);
ra.foo(); // matches both
Thanks for any hints.
Re: Objective C protocols
On Saturday, 16 May 2020 at 19:14:51 UTC, John Colvin wrote: What's the best way to implement an Objective C protocol in D? I see mention here https://dlang.org/changelog/2.085.0.html#4_deprecated_objc_interfaces but it's not clear where things are these days. Based on some experimentation, I'm starting to wonder do protocols actually have any runtime component in Objective C? Because if I pass in an extern(Objective-C) class with the right interface to a function expecting a protocol everything just works.
Objective C protocols
What's the best way to implement an Objective C protocol in D? I see mention here https://dlang.org/changelog/2.085.0.html#4_deprecated_objc_interfaces but it's not clear where things are these days.
Re: Easy way to format int in pragma msg ?
On Thursday, 14 May 2020 at 09:49:15 UTC, wjoe wrote:
Is there an easy way to print an int in hexadecimal, octal or
binary representation ?
The documentation on pragma(msg, ...) and a quick web search
didn't provide an answer.
import std.string;
pragma(msg, format("%x", 10));
%x = hex
%o = octal
%b = binary
Re: Luneta: terminal fuzzy finder
On Tuesday, 5 May 2020 at 07:31:18 UTC, Panke wrote: On Monday, 4 May 2020 at 22:49:49 UTC, Felipe wrote: Hi, I develop an interactive terminal fuzzy finder in D with ncurses. Feel free to check it out and contribute. Any feedback is welcome. Thanks, Felipe [1] https://github.com/fbeline/luneta [2] https://code.dlang.org/packages/luneta [3] https://code.dlang.org/packages/fuzzyd What's the difference to fzf? Seems like this is being discussed here: https://github.com/fbeline/luneta/issues/28
Re: dmdcache
On Saturday, 25 April 2020 at 10:17:50 UTC, Ali Çehreli wrote: A colleague of mine has written dmdcache which may be very useful for some projects: https://github.com/seeraven/dmdcache It drops our build time from 8 minutes to 45 seconds on a particular build environment for about half a dozen D programs, one of which ends up being a 2G executable! WAT! :) And the total cache size is 5.5G. Wow! This build is with dmd 2.084.1 and that one particular application uses tons of template instantiations most of which are in generated source code. If I remember correctly, 2.084.1 does not contain template symbol name improvements and that may be the reason for the large size. Enjoy! Ali Perhaps I'm being very dumb, but how does this differ from just using make?
Re: Online D Conference
Motivating Questions: What is the difference between an "Online Conference" and watching something on youtube? If the answer is nothing, don't bother with a conference, just create a youtube channel. If the answer is a conference is nothing like watching stuff on youtube... you better consciously and actively organise it to be different. What is the difference between "Online" and "Meat space"? If the answer is "Nothing", you will have a guy, selected by a papers committee, standing in front of an empty hall talking at the camera. Otherwise you can think much much wider... * screencasts * massively multiprogrammer online sessions * remove the paper selection committee and replace it with redditlike upvotes * or write a paper like you write a library, collaboratively, on github, with PR's. * Have game sessions, virtual choirs, ... whatever can turn online handles into humans. Disclaimer: I was involved in arranging linuxconfau 2019 and observed first hand that meatspace conferences impose huge and tight constraints on what is possible... Some things are about meatspace are very nice (eat! drink! be merry!). Some things cost a huge amount and decrease the value of the conference. (Very tight limits on number of tracks / papers, attendees, health and safety, transport, accommodation, flights, .)
Re: DConf 2020 Canceled
On Saturday, 7 March 2020 at 20:37:32 UTC, Mike Parker wrote: Personally, I was really looking forward to heading to London and seeing everyone again, but I do agree with the decision. We hope not many of you will be impacted by the decision and we're terribly sorry if you are. Very disappointing as I'd hoped to go for at least one day for the first time. But very much the right thing to do under the circumstances.
Is it safe in D to cast pointers to structures like this?
After years of C++ I have become paranoid about any casting of
pointers being undefined behavior due to aliasing so want to see
if :-
1) This is safe to do in D.
2) If not is there anything I can do to make it safe.
3) If not, what is the best approach?
I have a void* pointing to a block of allocated memory. In that
memory I have a header struct at the start, and some of the
members of that struct are offsets into the memory of other
structs.
Can I do this? It appears to compile and "work" in dmd 64 bit but
I need to make sure it's valid and reliable code. (This is a
minimal example without any error checking etc)
import std.stdio;
//
// getMemory is just an example to make this compile...
//
void* getMemory()
{
static byte[100] someData;
// Something fills in the data here
}
struct Header
{
ulong data1;
ulong data2;
}
struct Data1
{
int a;
}
struct Data2
{
int b;
float[10] d;
}
void main()
{
void* memory = getMemory();
auto header = cast(Header*)memory;
auto data1 = cast(Data1*)(memory + header.data1);
auto data2 = cast(Data2*)(memory + header.data2);
writeln(data1.a, " ", data2.b);
}
Re: Win32 Api: How create Open/"Save as" Dialog?
On Saturday, 11 January 2020 at 10:34:34 UTC, Marcone wrote:
This code works, but I can't get file Path. Someone can help me?
import std;
import core.sys.windows.windows;
pragma(lib, "comdlg32");
void main(){
OPENFILENAME ofn;
wchar* szFileName;
You need to supply a buffer, not a pointer:
wchar[MAX_PATH] szFileName;
(cast(byte*)& ofn)[0 .. ofn.sizeof] = 0;
ofn.lStructSize = ofn.sizeof;
ofn.hwndOwner = null;
The above lines are unnecessary as D structs are automatically
initialized and lStructSize is already filled in.
ofn.lpstrFilter = "Text Files (*.txt)\0*.txt\0All Files
(*.*)\0*.*\0";
ofn.lpstrFile = szFileName;
It wants a pointer to your buffer:
ofn.lpstrFile = szFileName.ptr;
ofn.nMaxFile = MAX_PATH;
ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST |
OFN_HIDEREADONLY;
ofn.lpstrDefExt = "txt";
if(GetOpenFileNameW()){
writeln(szFileName); // Print null
writeln(ofn.lpstrFile); // Print null
You'll need to slice the buffer to the right length:
import core.stdc.wchar_ : wcslen;
writeln(ofn.lpstrFile[0 .. wcslen(ofn.lpstrFile.ptr)]);
}
}
Re: DConf 2019 Pictures
On Tuesday, 7 January 2020 at 13:37:24 UTC, Ethan wrote: On Tuesday, 7 January 2020 at 09:04:04 UTC, Ali Çehreli wrote: This one is Laeeth introducing Andrei at Symmetry Investments: http://acehreli.org/photo/dconf_2019/DSC04839.html Ali And if you start here you get to the important bits: BeerConf! http://acehreli.org/photo/dconf_2019/DSC04853.html Damn... I miss beerconf.
Re: code.dlang.org downtime
On Wednesday, 18 December 2019 at 10:18:03 UTC, Sebastiaan Koppe wrote: On Wednesday, 18 December 2019 at 09:29:50 UTC, John Colvin wrote: This is still down for me, regardless of using the IP or address. I don't think it's just me either: https://stats.uptimerobot.com/6mQX4Crw2L/783838659 Anytime you see the metadata working you can add `--registry=https://dub.bytecraft.nl` to dub. I am really tempted to cache the metadata as well. Although that brings up the question of how to purge it when new versions are released. (I could setup a job to import the dump every now and then, hmm). This stuff just begs to be fixed. can't get metadata, so no good right now.
Re: code.dlang.org downtime
On Monday, 16 December 2019 at 11:04:38 UTC, Sönke Ludwig wrote: As you may have already noticed, the main registry server, code.dlang.org got unreachable yesterday. This was caused by an old VPS of mine getting terminated. The registry had already moved to a different server years ago, but, without me realizing it, the DNS entry still pointed to the old one, with a "temporary" HTTP proxy forwarding to the new server being set up. By now the DNS entry has been corrected, an up-to-date TLS certificate is in place, and the registry is running stable. There are still reports of people not being able to access code.dlang.org, which is apparently caused by intermediate DNS servers still reporting the old IP address and should start working during the next few hours. A temporary workaround is to specify --registry=http://31.15.67.41/ on the dub command line. Unfortunately both fallback servers have been down for a while now, so that this resulted in a total blackout. I plan to move the main registry to a powerful dedicated server in January, which will fix all memory resource related issues that sometimes show up, and could then keep the current VPS as a relatively reliable fallback server. Both together should guarantee virtually 100% uptime, although more fallback servers are of course highly desirable. In addition to that, I plan to separate the repository polling process form the web and REST frontend, as the former appears to be the main cause for failures (a GC memory leak of some kind and a possibly codegen related crash when being compiled with DMD being the two known issues, which both need further investigation). This is still down for me, regardless of using the IP or address. I don't think it's just me either: https://stats.uptimerobot.com/6mQX4Crw2L/783838659
Re: Release D 2.089.0
On Wednesday, 6 November 2019 at 01:16:00 UTC, Manu wrote: On Tue, Nov 5, 2019 at 5:14 PM Manu wrote: On Tue, Nov 5, 2019 at 1:20 PM John Chapman via Digitalmars-d-announce wrote: > > On Tuesday, 5 November 2019 at 19:05:10 UTC, Manu wrote: > > Incidentally, in your sample above there, `a` and `b` are > > not shared... why not just write: `cas(, null, b);` ?? > > If source data is not shared, you shouldn't cast to shared. > > Because casts were needed in 2.088 and earlier and I just > updated to 2.089, unaware of the API change. Should I log > `null` not working as a bug? Yes But I also think you should update your code to not perform the casts. Can you confirm that the null works when removing the shared casts? Yes and no - it compiles when removing the casts, but AVs at runtime. Bug filed: https://issues.dlang.org/show_bug.cgi?id=20359
Re: Release D 2.089.0
On Tuesday, 5 November 2019 at 19:05:10 UTC, Manu wrote: Incidentally, in your sample above there, `a` and `b` are not shared... why not just write: `cas(, null, b);` ?? If source data is not shared, you shouldn't cast to shared. Because casts were needed in 2.088 and earlier and I just updated to 2.089, unaware of the API change. Should I log `null` not working as a bug?
Re: Release D 2.089.0
On Tuesday, 5 November 2019 at 07:52:12 UTC, John Chapman wrote:
Sure - this AVs on DMD 2.088 Windows:
import core.atomic;
void main() {
Object a, b = new Object;
cas(cast(shared), null, cast(shared)b);
}
Sorry, I meant it AVs 2.089, but works on 2.088.
Re: Release D 2.089.0
On Tuesday, 5 November 2019 at 06:44:29 UTC, Manu wrote:
On Mon., 4 Nov. 2019, 2:05 am John Chapman via
Digitalmars-d-announce, < digitalmars-d-announce@puremagic.com>
wrote:
Something has changed with core.atomic.cas - it used to work
with `null` as the `ifThis` argument, now it throws an AV. Is
this intentional?
If I use `cast(shared)null` it doesn't throw but if the change
was deliberate shouldn't it be mentioned?
Changes were made because there were a lot of problems with
that module...
but the (reasonably comprehensive) unit tests didn't reveal any
such
regressions. We also build+test many popular OSS projects via
buildkite,
and there weren't problems.
Can you show the broken code?
Sure - this AVs on DMD 2.088 Windows:
import core.atomic;
void main() {
Object a, b = new Object;
cas(cast(shared), null, cast(shared)b);
}
