Re: Current limitations of -dip1000

[Walter Bright via Digitalmars-d]

On 10/10/2017 3:31 PM, Nordlöw wrote:

I did it: https://issues.dlang.org/show_bug.cgi?id=17892


Thank you!

[Issue 17892] Scope analysis with -dip1000 fails for templated structs

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17892

Walter Bright  changed:

   What|Removed |Added

   Keywords||safe
 CC||bugzi...@digitalmars.com
   Hardware|x86_64  |All
 OS|Linux   |All

--

Re: Why do I have to cast arguments from int to byte?

[rjframe via Digitalmars-d-learn]

On Tue, 10 Oct 2017 19:55:36 +, Chirs Forest wrote:

> It wouldn't be so bad if I didn't have to use the word cast before each
> cast, bust since I have to specify both the word cast and the cast type
> and then wrap both the cast type and the value in brackets... it just
> explodes my code into multiple lines of unreadable mess.
> 
> 
> void foo(T)(T bar, T bar2, T bar3){...}
> 
> byte foobar = 12;
> 
> foo!byte(foobar + 1, foobar + 22, foobar + 333);
> vs.
> foo!byte(cast(byte)(foobar + 1), cast(byte)(foobar + 22),
> cast(byte)(foobar + 333));


You could wrap the cast in a function to clean it up a bit:

void main() {
byte foobar = 12;
foo!byte((foobar + 1).b, (foobar + 22).b, (foobar + 333).b);
}

byte b(int n) pure {
pragma(inline, true); // Probably not necessary.
return cast(byte)n;
}

void foo(T)(T bar, T bar2, T bar3) {
import std.stdio : writeln;
import std.string : format;
writeln("%s, %s, %s".format(bar, bar2, bar3));
}


--Ryan

[Issue 10060] readf doesn't work with arrays

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=10060

alex.jercai...@gmail.com changed:

   What|Removed |Added

 CC||alex.jercai...@gmail.com
   Assignee|nob...@puremagic.com|alex.jercai...@gmail.com

--

Re: Current limitations of -dip1000

[Nordlöw via Digitalmars-d]

On Tuesday, 10 October 2017 at 18:58:42 UTC, Nordlöw wrote:

On Tuesday, 10 October 2017 at 14:12:04 UTC, 12345swordy wrote:
Report any bugs to the official bug tracker here: 
https://issues.dlang.org/


Shall I file the bug?


I did it: https://issues.dlang.org/show_bug.cgi?id=17892

[Issue 17892] New: Scope analysis with -dip1000 fails for templated structs

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17892

  Issue ID: 17892
   Summary: Scope analysis with -dip1000 fails for templated
structs
   Product: D
   Version: D2
  Hardware: x86_64
OS: Linux
Status: NEW
  Severity: critical
  Priority: P1
 Component: dmd
  Assignee: nob...@puremagic.com
  Reporter: per.nord...@gmail.com

When

struct S {
@safe:
int[ 128] x;
scope ref int front() return {
return x[ 0];
}
scope int* pointer() return {
return [ 0];
}
}
ref int testFront() {
S s;
return s.front(); // error
}
int* testPointer() {
S s;
return s.pointer(); // error
}

is turned into a template

@safe:
struct ST( T) {
@safe:
T[ 128] x;
scope ref T front() return {
return x[ 0];
}
scope T* pointer() return {
return [ 0];
}
}

scope analysis (with -dip1000) no longer forbids escaping of reference and
pointer as in

ref int testFrontT() {
ST!int s;
return s.front(); // reference to stack element escapes
}
int* testPointerT() {
ST!int s;
return s.pointer(); // pointer to stack element escapes
}

--

Re: Multiline string literal improvements

[sarn via Digitalmars-d]

On Tuesday, 10 October 2017 at 21:38:41 UTC, captaindet wrote:

string a = |q{
  firstLine();
  if (cond) {
  secondLine()
  }
   };


you could write your own string processing function according 
to your needs


FWIW, that's the solution in Python:
https://docs.python.org/release/3.6.3/library/textwrap.html#textwrap.dedent

Works even better in D because it can run at compile time.

Re: the best language I have ever met(?)

[Igor Shirkalin via Digitalmars-d-learn]

On Friday, 25 November 2016 at 19:16:43 UTC, ketmar wrote:
yeah. but i'm not Andrei, i don't believe that the only 
compiler task is to resolve templated code. ;-) i.e. Andrei 
believes that everything (and more) should be moved out of 
compiler core and done with library templates. Andrei is 
genius, for sure, but he is living somewhere in future, where 
our PCs are not bound by memory, CPU, and other silly 
restrictions. ;-)


tl;dr: using template for this sux.


Nice to meet you, Andrei!

Yes, in mathematics we are more servants than gentlemen (Charles 
Hermite).

Re: initializing a static array

[kinke via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 22:00:27 UTC, kinke wrote:

[...]


Ah sorry, overlooked that it's the initializer for a struct field.

Re: initializing a static array

[kinke via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 14:15:07 UTC, Simon Bürger wrote:
On Tuesday, 10 October 2017 at 13:48:16 UTC, Andrea Fontana 
wrote:

Maybe:

double[n] bar = 0.repeat(n).array;


This works fine, thanks a lot. I would have expected `.array` 
to return a dynamic array. But apparently the compiler is smart 
enough to know the length. Even the multi-dimensional case 
works fine:


double[n][n] bar = 0.repeat(n).array.repeat(n).array;


I hope this is not performance-critical code. The assembly is 
terrible for such code, at least for LDC, doing a GC allocation, 
unrolled reset to zero, then memcpying the dynamic array back to 
the stack: https://godbolt.org/g/uXBN75


`double[n] bar = void; bar[] = 0;` (2 lines, granted) results in 
a memset.

Re: Multiline string literal improvements

[captaindet via Digitalmars-d]

string a = |q{
  firstLine();
  if (cond) {
  secondLine()
  }
   };


you could write your own string processing function according to your 
needs to filter the code string, and use it like

string a = inject(q{...})   //or
string a = inject!(formatOpts)(q{...})

i have done this myself and also included positional argument formatting 
to my liking, optimized for CT code generation. don't have the code at 
my hands ATM though. could post it later if you are interested.


/det

[Issue 17891] forum is dog slow

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17891

ki...@gmx.net changed:

   What|Removed |Added

 CC||ki...@gmx.net

--- Comment #2 from ki...@gmx.net ---
Right now it's particularly bad, but the overall experience has been pretty bad
for weeks now. Not just the web forum, but the Wiki as well. CI is also dying
because dlang.org can't serve downloads at times.
As I stated in
http://forum.dlang.org/thread/vndgejrhmqynthwbf...@forum.dlang.org, most
requests are served in an instant, but there seem to be times where the server
takes 10-60 secs to respond, to the point where it's barely usable. If I have
multiple pending requests during such a period (a couple of browser tabs), all
of them are served at the same time once the server seems to recover.

I'd much rather have a constant delay of a few seconds instead of
not-that-infrequent-spikes, those are much more annoying. Of the few websites I
use regularly, dlang.org leaves the worst impression performance-wise, by far.

--

Re: Why do I have to cast arguments from int to byte?

[Adam D. Ruppe via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 19:55:36 UTC, Chirs Forest wrote:

Why?


D inherited a silly rule from C where any arithmetic is promoted 
to int first.


The big difference is D doesn't do implicit narrowing 
conversion... so x + 1 becomes int, but then int to byte requires 
an explicit cast (unless the compiler can prove the range in that 
particular expression - this is called "value range propagation").


I think it has proved to be a bit of a mistake :(

Re: "This week in D" state

[Igor Shirkalin via Digitalmars-d]

On Tuesday, 10 October 2017 at 15:52:03 UTC, Adam D. Ruppe wrote:
Of course, if someone wants to email me something I can 
copy/paste in, that's cool... but you could also send that to 
the blog...


I'd like to but i would be nice to know where to write to without 
required piles.

Multiline string literal improvements

[Igor via Digitalmars-d]

D has a very nice feature of token strings:
string a = q{
   looksLikeCode();
};

It is useful in writing mixins and to have syntax highlighting in 
editors. Although I like it, it is not something I ever felt like 
missing in other languages. What I do always miss are these two 
options:


1. Have something like this:

string a = |q{
 firstLine();
 if (cond) {
 secondLine()
 }
  };

mean count the number of whitespace characters at the start of a 
first new line of string literal and then strip up to that many 
whitespace characters from the start of each line.


2. If we just put for example "-" instead of "|" in above example 
have that mean: replace all whitespace with a single space in 
following string literal.


I think it is clear why would these be useful but if you want me 
I can add a few examples. This would not make any breaking 
changes to the language and it should be possible to simply 
implement it wholly in the lexer.


So what do think?

Re: how to shorten templates structs name?

[Ali Çehreli via Digitalmars-d-learn]

On 10/10/2017 04:30 AM, drug wrote:
> using classes I can make an inherited class of templated class and avoid
> too long mangled name:
> ```
> class TemplatedClass(A, Very, Much, Args, Here) { ... }
>
> class ShortenClass : TemplatedClass!(A,Very, Much, Args, Here) { ... };
> ```
> Now ShortenClass has a nice mangling.
>
> What can be done in case of struct?

I think an alias is more suitable here for both classes and structs:

alias ShortenClass = TemplatedClass!(int,bool, float, ubyte, string);

Ali

Re: Why do I have to cast arguments from int to byte?

[Moritz Maxeiner via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 19:55:36 UTC, Chirs Forest wrote:
I keep having to make casts like the following and it's really 
rubbing me the wrong way:


void foo(T)(T bar){...}

byte bar = 9;

[...]

Why?


Because of integer promotion [1], which is inherited from C.

[1] https://dlang.org/spec/type.html#integer-promotions

Re: Why do I have to cast arguments from int to byte?

[Igor Shirkalin via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 19:55:36 UTC, Chirs Forest wrote:
I keep having to make casts like the following and it's really 
rubbing me the wrong way:


void foo(T)(T bar){...}

byte bar = 9;

foo!byte(bar + 1); //Error: function foo!byte.foo (byte bar) is 
not callable using argument types (int)	

foo!byte(cast(byte)(bar + 1));

It wouldn't be so bad if I didn't have to use the word cast 
before each cast, bust since I have to specify both the word 
cast and the cast type and then wrap both the cast type and the 
value in brackets... it just explodes my code into multiple 
lines of unreadable mess.



void foo(T)(T bar, T bar2, T bar3){...}

byte foobar = 12;

foo!byte(foobar + 1, foobar + 22, foobar + 333);
vs.
foo!byte(cast(byte)(foobar + 1), cast(byte)(foobar + 22), 
cast(byte)(foobar + 333));


Why?


Because int (1) + ubyte (9) = int

Re: is private broken?

[Seb via Digitalmars-d]

On Tuesday, 10 October 2017 at 20:02:32 UTC, Jonathan M Davis 
wrote:
On Tuesday, October 10, 2017 15:33:30 Steven Schveighoffer via 
Digitalmars-d wrote:

On 10/10/17 3:20 PM, Jonathan Marler wrote:
> On windows I was able to compile the following using both 
> dmd.2.075.1 and dmd.2.076.1

>
>  From what I understand, you shouldn't be able to access 
> private

>
> fields/methods like this...am I missing something?

Before I even read your code, I was pretty sure the error :)


LOL. Same here. It seems like almost everyone makes this 
mistake unless they caught the information first by doing 
something like reading the spec carefully or reading TDPL. And 
if you always treat your types as if nothing else can access 
their private members and don't need the equivalent of a C++ 
friend function, odds are, that you'll never notice...


- Jonathan M Davis


FWIW this confusion found it's way into Phobos as the unittest 
was in the same module:


https://dlang.org/phobos/std_traits.html#getSymbolsByUDA

See also: https://issues.dlang.org/show_bug.cgi?id=17643

Re: is private broken?

[jmh530 via Digitalmars-d]

On Tuesday, 10 October 2017 at 19:59:05 UTC, Jonathan M Davis 
wrote:


There is - by putting them in a separate module. It was done 
this way to avoid the extra complication of friend functions 
that you get in C++, and the theory is that you're in control 
of everything that's in your own module, [snip]


I hadn't realized this was the reason for it. Makes sense.

[Issue 17891] forum is dog slow

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17891

--- Comment #1 from Vladimir Panteleev  ---
There is some maintenance running on the server right now which is impacting
load. Should be resolved soon.

--

Re: is private broken?

[Steven Schveighoffer via Digitalmars-d]

On 10/10/17 4:02 PM, Jonathan M Davis wrote:

On Tuesday, October 10, 2017 15:33:30 Steven Schveighoffer via Digitalmars-d
wrote:

On 10/10/17 3:20 PM, Jonathan Marler wrote:

On windows I was able to compile the following using both dmd.2.075.1
and dmd.2.076.1

  From what I understand, you shouldn't be able to access private

fields/methods like this...am I missing something?


Before I even read your code, I was pretty sure the error :)


LOL. Same here. It seems like almost everyone makes this mistake unless they
caught the information first by doing something like reading the spec
carefully or reading TDPL. And if you always treat your types as if nothing
else can access their private members and don't need the equivalent of a C++
friend function, odds are, that you'll never notice...


Yeah, if you look back far enough in the forums, I'm pretty sure I 
posted a message similar to Mr. Marler's about this shocking revelation :)


-Steve

Re: is private broken?

[Jonathan M Davis via Digitalmars-d]

On Tuesday, October 10, 2017 15:33:30 Steven Schveighoffer via Digitalmars-d 
wrote:
> On 10/10/17 3:20 PM, Jonathan Marler wrote:
> > On windows I was able to compile the following using both dmd.2.075.1
> > and dmd.2.076.1
> >
> >  From what I understand, you shouldn't be able to access private
> >
> > fields/methods like this...am I missing something?
>
> Before I even read your code, I was pretty sure the error :)

LOL. Same here. It seems like almost everyone makes this mistake unless they
caught the information first by doing something like reading the spec
carefully or reading TDPL. And if you always treat your types as if nothing
else can access their private members and don't need the equivalent of a C++
friend function, odds are, that you'll never notice...

- Jonathan M Davis

Why do I have to cast arguments from int to byte?

[Chirs Forest via Digitalmars-d-learn]

I keep having to make casts like the following and it's really 
rubbing me the wrong way:


void foo(T)(T bar){...}

byte bar = 9;

foo!byte(bar + 1); //Error: function foo!byte.foo (byte bar) is 
not callable using argument types (int)	

foo!byte(cast(byte)(bar + 1));

It wouldn't be so bad if I didn't have to use the word cast 
before each cast, bust since I have to specify both the word cast 
and the cast type and then wrap both the cast type and the value 
in brackets... it just explodes my code into multiple lines of 
unreadable mess.



void foo(T)(T bar, T bar2, T bar3){...}

byte foobar = 12;

foo!byte(foobar + 1, foobar + 22, foobar + 333);
vs.
foo!byte(cast(byte)(foobar + 1), cast(byte)(foobar + 22), 
cast(byte)(foobar + 333));


Why?

Re: is private broken?

[Jonathan M Davis via Digitalmars-d]

On Tuesday, October 10, 2017 19:50:49 Jonathan Marler via Digitalmars-d 
wrote:
> On Tuesday, 10 October 2017 at 19:33:30 UTC, Steven Schveighoffer
>
> wrote:
> > On 10/10/17 3:20 PM, Jonathan Marler wrote:
> >> On windows I was able to compile the following using both
> >> dmd.2.075.1 and dmd.2.076.1
> >>
> >>  From what I understand, you shouldn't be able to access
> >>
> >> private fields/methods like this...am I missing something?
> >
> > Before I even read your code, I was pretty sure the error :)
> >
> > private is module-based, not type based. Put your structs in a
> > different module, and private will work.
> >
> > -Steve
>
> Wow I can't believe I've gone this long not realizing that.  I'm
> surprised there's not a way to make fields private to their own
> struct/class.

There is - by putting them in a separate module. It was done this way to
avoid the extra complication of friend functions that you get in C++, and
the theory is that you're in control of everything that's in your own
module, so you should be able to deal with not having stuff access stuff in
the same module when it shouldn't. And if you want nothing outside the type
to have access, just stick the type in its own module.

- Jonathan M Davis

Re: is private broken?

[Jonathan Marler via Digitalmars-d]

On Tuesday, 10 October 2017 at 19:33:30 UTC, Steven Schveighoffer 
wrote:

On 10/10/17 3:20 PM, Jonathan Marler wrote:
On windows I was able to compile the following using both 
dmd.2.075.1 and dmd.2.076.1


 From what I understand, you shouldn't be able to access 
private fields/methods like this...am I missing something?


Before I even read your code, I was pretty sure the error :)

private is module-based, not type based. Put your structs in a 
different module, and private will work.


-Steve


Wow I can't believe I've gone this long not realizing that.  I'm 
surprised there's not a way to make fields private to their own 
struct/class.

[Issue 17891] New: forum is dog slow

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17891

  Issue ID: 17891
   Summary: forum is dog slow
   Product: D
   Version: D2
  Hardware: x86
OS: Windows
Status: NEW
  Severity: major
  Priority: P1
 Component: dlang.org
  Assignee: nob...@puremagic.com
  Reporter: johnnymar...@gmail.com

Lately the forms have been loading alot slower, over 10 seconds to load a
single page, sometimes it seems to take longer.  Today (October 10, 2017) pages
are taking about a minute to load each time making the forums almost unusable.

--

Re: is private broken?

[Steven Schveighoffer via Digitalmars-d]

Hah! Beat you by 10 seconds :)

-Steve

Re: is private broken?

[Steven Schveighoffer via Digitalmars-d]

On 10/10/17 3:20 PM, Jonathan Marler wrote:
On windows I was able to compile the following using both dmd.2.075.1 
and dmd.2.076.1


 From what I understand, you shouldn't be able to access private 
fields/methods like this...am I missing something?


Before I even read your code, I was pretty sure the error :)

private is module-based, not type based. Put your structs in a different 
module, and private will work.


-Steve

Re: is private broken?

[w0rp via Digitalmars-d]

https://wiki.dlang.org/Access_specifiers_and_visibility#private

Private means that only members of the enclosing class can 
access the member, or members and functions in the same module 
as the enclosing class.


You can access private attributes anywhere in the same module.

is private broken?

[Jonathan Marler via Digitalmars-d]

On windows I was able to compile the following using both 
dmd.2.075.1 and dmd.2.076.1


From what I understand, you shouldn't be able to access private 
fields/methods like this...am I missing something?  I find it 
hard to believe that a bug of this magnitudue could have been 
introduced and not been noticed for so long. Does this compile on 
other people's systems as well?


import std.stdio;
struct SomeStruct
{
private int privateValue;
private void privateFunction()
{
}
}
class SomeClass
{
private int privateValue;
private void privateFunction()
{
}
}
void main()
{
auto someStruct = SomeStruct(42);
writefln("someStruct.privateValue = %s", 
someStruct.privateValue);

someStruct.privateFunction();

auto someStructRef = new SomeStruct(42);
writefln("someStructRef.privateValue = %s", 
someStructRef.privateValue);

someStruct.privateFunction();

auto someClass = new SomeClass();
writefln("someClass.privateValue = %s", 
someClass.privateValue);

someClass.privateFunction();
}

Array/range-version of emplace

[Nordlöw via Digitalmars-d-learn]

Why isn't there an array/range version of `emplace`, when there 
is one for `moveEmplace`, namely


https://dlang.org/library/std/algorithm/mutation/move_emplace_all.html

?

Re: Current limitations of -dip1000

[Nordlöw via Digitalmars-d]

On Tuesday, 10 October 2017 at 14:12:04 UTC, 12345swordy wrote:
Report any bugs to the official bug tracker here: 
https://issues.dlang.org/


Shall I file the bug?

[Issue 17740] ghost "internal" symbols show up sometimes

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17740

--- Comment #9 from Mr. Smith  ---
Error doesn't happen when `import std.datetime : MonoTime;` is removed

--

[Issue 17740] ghost "internal" symbols show up sometimes

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17740

--- Comment #8 from Steven Schveighoffer  ---
Correction: PR was not about MonoTime but SysTime. But still, datetime seems to
be involved.

--

[Issue 17740] ghost "internal" symbols show up sometimes

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17740

--- Comment #7 from Steven Schveighoffer  ---
Hm... I didn't see this before, but you have an import for MonoTime. On the
original PR I saw this, it was an update to MonoTime.

Can you confirm that your code works or not without MonoTime import (which
seems to be doing nothing in your latest version)?

--

[Issue 17740] ghost "internal" symbols show up sometimes

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17740

--- Comment #6 from Mr. Smith  ---
Looks like the problem is with
Piece* sentinel = new Piece;
If I do that at runtime it works.

--

[Issue 17890] cpp_long is not declared for Posix 64bit

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17890

--- Comment #1 from anonymous4  ---
(In reply to Илья Ярошенко from comment #0)
> BTW, why c_long is always 32 bit for windows?

I suppose for compatibility with code written for 32-bit architecture, though
long was 32-bit in 16-bit mode too.

--

Re: "This week in D" state

[Adam D. Ruppe via Digitalmars-d]

On Tuesday, 10 October 2017 at 16:36:14 UTC, jmh530 wrote:
While I liked when you did the longer stuff, I think even the 
slimmed down version has value. It's also probably less work 
for you (or someone else if they take it over).


Yeah, I'll post the last couple I generated but never saved.

This previous sunday though I was busy and just totally forgot to 
even generate.

Re: "This week in D" state

[jmh530 via Digitalmars-d]

On Tuesday, 10 October 2017 at 15:52:03 UTC, Adam D. Ruppe wrote:


I generated the file for a couple weeks last month, but I'm not 
happy at all with the forum links but also don't have much 
else to put in. The blog really took over for the longer form 
stuff I used to write.


I might go ahead and post the back stuff anyway but without at 
least some other content it seems like a waste of time.


Of course, if someone wants to email me something I can 
copy/paste in, that's cool... but you could also send that to 
the blog...


While I liked when you did the longer stuff, I think even the 
slimmed down version has value. It's also probably less work for 
you (or someone else if they take it over).

[Issue 17740] ghost "internal" symbols show up sometimes

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17740

Mr. Smith  changed:

   What|Removed |Added

 CC||mrsmit...@yandex.ru

--- Comment #5 from Mr. Smith  ---
Here is even smaller test case:

// main.d
import texteditor;
void main() {}

// texteditor.d
module texteditor;
class EditorTextModel
{
void fun() { editor.fun2(); }
TextEditor editor;
}
struct TextEditor
{
Piece* sentinel = new Piece;
void fun2() {}
import std.datetime : MonoTime;
}
struct Piece {}

// dmd -m64 -lib -of="lib.lib" -debug -g -w  -I="./" texteditor.d
// dmd -m64 -of="app.exe" -debug -g -w -I="./" lib.lib main.d

--

Re: How do I filter out data from mongodb in D-code

[Eduard Staniloiu via Digitalmars-d]

On Tuesday, 10 October 2017 at 09:43:10 UTC, Anders S wrote:

Hi,

I'm working on a middleware application that reads array of 
data from a POSIX pipe and insert data into the db if any 
position in the array has changed.
This is where my problem lays, in order not to duplicate data I 
want to fetch the latest data/document in the array of 
documents.

I'm using MS Code and dub to code and compile.

This is the code:
Collection ct = mongo.boxweb.celltab;
int i = 1;
for(;i < 10; i++ ){
   auto cell = 
ct.find({"number":i}).sort({_id:-1}).limit(2).pretty();
   if (insert...


   i++;

Where "number" is the document nr in the array

I get these errors
source/app.d(166,54): Error: found : when expecting ; following 
statement
source/app.d(166,56): Error: found } when expecting ; following 
statement

source/app.d(166,57): Error: found ) instead of statement
dmd failed with exit code 1.

Any ideas?
Isn't there a way to markup code in the forum message to 
separate from the bodytext?


/anders



Hello,

I haven't used mongo and D together, but by looking at [0] and 
[1] I can see that mondo is using Bson, which, as far as I can 
tell takes an associative array.


I'm guessing you need to replace the JS dictionary sintax { k: v 
} with the AA one [ k: v ].


I haven't been able to try this out as I am on my phone. Also, 
this might be more suited for the Learn thread.


Regarding the code markup, as far as I know, we don't have this.

Hope this helps,
Eduard

[0] - https://code.dlang.org/packages/mondo
[1] - http://vibed.org/api/vibe.data.bson/

Re: initializing a static array

[ag0aep6g via Digitalmars-d-learn]

On 10/10/2017 03:36 PM, Simon Bürger wrote:
I have a static array inside a struct which I would like to be 
initialized to all-zero like so


   struct Foo(size_t n)
   {
     double[n] bar = ... all zeroes ...
   }

(note that the default-initializer of double is nan, and not zero)

I tried

   double[n] bar = 0;  // does not compile


Works for me:


struct Foo(size_t n)
{
double[n] bar = 0;
}
void main()
{
import std.stdio;
Foo!5 foo;
writeln(foo.bar); /* prints "[0, 0, 0, 0, 0]" */
}

Re: "This week in D" state

[Adam D. Ruppe via Digitalmars-d]

On Tuesday, 10 October 2017 at 07:12:19 UTC, Eliatto wrote:
I noticed that "This week in D" site was seldom updated. Last 
activity is September, the 3rd. If Adam is busy at the moment, 
then I think that he should have an assistant.


I generated the file for a couple weeks last month, but I'm not 
happy at all with the forum links but also don't have much 
else to put in. The blog really took over for the longer form 
stuff I used to write.


I might go ahead and post the back stuff anyway but without at 
least some other content it seems like a waste of time.


Of course, if someone wants to email me something I can 
copy/paste in, that's cool... but you could also send that to the 
blog...

[Issue 16510] Request: RSA digital signature validation in phobos

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16510

--- Comment #2 from Andre  ---
As far as I know there is no native library available (not depending on e.g.
openssl dll) which works for dmd OMF.

Unfortunately even botan only works with x86 / x64 coff.

--

[Issue 9362] Add a method to remove one item to std.container.SList

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=9362

Alexandru Razvan Caciulescu  changed:

   What|Removed |Added

 CC||alexandru.razva...@gmail.co
   ||m
   Assignee|nob...@puremagic.com|alexandru.razva...@gmail.co
   ||m

--

[Issue 17740] ghost "internal" symbols show up sometimes

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17740

--- Comment #4 from Steven Schveighoffer  ---
A better reduced test case:

https://gist.github.com/MrSmith33/dc53d8cb6ce642fcb6dbc5863d029cec

Courtesy of MrSmith:

https://forum.dlang.org/post/ahoyjzxreidgosqij...@forum.dlang.org

--

Re: Linking error: unresolved external symbol internal

[Steven Schveighoffer via Digitalmars-d-learn]

On 10/10/17 11:09 AM, MrSmith wrote:

I have a static library and an application.

When linking final executable I get:
     lib.lib(texteditor_1d_40c.obj) : error LNK2001: unresolved external 
symbol internal
     lib.lib(textbuffer_14_3ce.obj) : error LNK2001: unresolved external 
symbol internal


Happens on Windows 32 and 64 bit.
Only with debug build.
DMD 2.076.0
Error doesn't happen when I move code from library to the application.

Here is reduced test case (where 2 errors happen, 4 files): 
https://gist.github.com/MrSmith33/29125fa3538bb03637d0aebab6ccff7c
Here is smaller case (only 1 error, 2 files): 
https://gist.github.com/MrSmith33/dc53d8cb6ce642fcb6dbc5863d029cec



If this is relevant: 3 places I found in dmd where "internal" symbol is 
created:
* 
https://github.com/dlang/dmd/blob/4d86fcba2fd2ef86cc85738cd2ac2b059dbb5800/src/ddmd/backend/dt.c#L420 

* 
https://github.com/dlang/dmd/blob/4d86fcba2fd2ef86cc85738cd2ac2b059dbb5800/src/ddmd/tocsym.d#L662 

* 
https://github.com/dlang/dmd/blob/4d86fcba2fd2ef86cc85738cd2ac2b059dbb5800/src/ddmd/tocsym.d#L681 



No idea exactly what causes it, but here is another place I've seen it:

https://issues.dlang.org/show_bug.cgi?id=17740

-Steve

Re: initializing a static array

[Daniel Kozak via Digitalmars-d-learn]

https://run.dlang.io/is/SC3Fks

Re: Deprecation message of library functions should state the replacement function

[Eduard Staniloiu via Digitalmars-d]

On Tuesday, 10 October 2017 at 13:56:36 UTC, Seb wrote:

On Tuesday, 10 October 2017 at 12:57:36 UTC, bauss wrote:
On Tuesday, 10 October 2017 at 11:48:48 UTC, Eduard Staniloiu 
wrote:

Hi guys,

I've just build druntime on Windows and we are displaying the 
following deprecation message:


src\core\sys\windows\odbcinst.d(157): Deprecation: function 
core.sys.windows.odbcinst.SQLInstallTranslatorW is deprecated.


I believe that we should also state with what should the 
deprecated function be replaced.


My 2 cents,
Eduard


They usually do, I just assume it was forgotten there and if 
you know which function is to replace it, then simply create a 
pr?


Or simply remove it as it has been deprecated since more than 
two years:


https://github.com/dlang/druntime/blob/8fbcc2d819a84a5340cc6ac724320cae3561cb3b/src/core/sys/windows/odbcinst.d



I'm not sure we should remove it since the replacement is 
available starting with ODBC 3.x [0].


I've made a PR [1] that states the replacement function in the 
deprecation message.


[0] - 
https://docs.microsoft.com/en-us/sql/odbc/reference/syntax/sqlinstalltranslator-function

[1] - https://github.com/dlang/druntime/pull/1936

Re: Default hashing function for AA's

[Steven Schveighoffer via Digitalmars-d]

On 10/9/17 10:11 AM, RazvanN wrote:

Hi all,

We in the UPB dlang group have been having discussions about the hashing 
functions of associative arrays. In particular, we were wondering why is 
the AA implementation in druntime is not using the hash function 
implemented in druntime/src/core/internal/hash.hashOf for classes that 
don't define toHash().


AA uses typeid(Key).getHash. [1]

For objects, this calls the virtual function `toHash`. [2]

Please keep in mind that all you are hashing is the class reference 
pointer, as that is the default comparison for `opEquals`. It might make 
sense to shuffle those bits a bit, since the bucket algorithm only looks 
at the lower bits of the hash, and this basically guarantees keys with 
the default hash will be empty in the first few buckets, since class 
objects are aligned on a power-of-2 boundary.


But I'm not sure running a full blown hash on the pointer is necessary. 
Perhaps just xor-ing the upper bits with the lower bits makes more sense.


Alternatively, you could change the default `opEquals` but that may 
break things more than expected.


What you *can't* do is change what the hash is based on without changing 
`opEquals`.


Note that I wouldn't recommend using an Object as a key without defining 
toHash and opEquals anyway.


-Steve

[1] https://github.com/dlang/druntime/blob/master/src/rt/aaA.d#L310
[2] https://github.com/dlang/druntime/blob/master/src/object.d#L66

Re: Proposal: Object/?? Destruction

[Steven Schveighoffer via Digitalmars-d]

On 10/9/17 11:22 AM, Timon Gehr wrote:

On 09.10.2017 01:20, Steven Schveighoffer wrote:


My questioning comes with this:

void bar(int a);
void bar((int,) x);

To me, it is confusing or at least puzzling that these two aren't the 
same.

...


Well, to me it is a bit confusing that this is puzzling to you. Why 
should int be the same as (int,)? It does not make sense to index an 
integer, but (int,) can be indexed with 0 to get an integer.


I understand why (int,) is different from int. What I meant was, why 
can't I *call* a function that takes a single int tuple with a single 
int value?


It shouldn't matter to the caller whether you plan to fiddle with your 
parameter via tuple syntax or directly with a value.


Again, I go back to the 2-parameter version. I can call it with 2 
values, or a tuple of 2 values. It makes no difference to the callee how 
I call it, as long as I put 2 values on the stack.


I don't see why it should be different for a single parameter function.

To put it another way, in your scheme, what is the benefit to 
overloading a single value function call with a function call that takes 
a single element tuple? When would this be useful?



Currently, I can call this:

foo(T...)(T t) if (T.length == 1) // function that takes a single 
element tuple


like this:

foo(1);

Why is this disallowed in your tuple scheme?
...


I take this to mean, why does the following code not compile:

void foo(T)(T t) if(T.length == 1) { ... }

foo(1);


Nope, I meant my original. A "tuple" as D currently uses it, can have 
exactly one element, and I can call that function with exactly one 
value. I don't have to call it as:


AliasSeq!(int) v;
v[0] = 1;
foo(v);

Which is analogous to your requirements (obviously, D is missing the 
syntax for tuple literals, which is why it's complicated).


Note that if foo is:

foo(int x);

I can still call it with v. I don't see why we can't keep these kinds of 
allowances.


I would think single value tuples and single values would be pretty 
much interchangeable.


Well, no. Otherwise 2[0] would be allowed and equal to 2. And then, what 
would [2][0] be? [2] or 2?


Not interchangeable in terms of usage, but interchangeable in terms of 
overloading.


What I would have expected is for foo(int) and foo((int,)) to be 
equivalent mangling (like the bar(int, int) and bar((int, int)) are 
equivalent), and for the caller to be able to call those functions with 
either a single value or a singleton tuple.


Inside the function, of course, they are treated differently as the 
callee decides whether to unpack the tuple or not via the parameters.


We can also think about adding a "light" version of tuple support, 
that just supports unpacking for library-defined tuple types and 
nothing else, but I'd prefer to have proper tuples.


This flew over my head :)
...


If we cannot have proper tuples, having some syntactic sugar for tuple 
unpacking during variable declaration may still be useful:


import std.typecons;

auto (x,y) = tuple(1,"2");
(int x,string y) = tuple(1,"2");

This is syntactically forward-compatible.


OK, this makes sense, yes.

-Steve

Linking error: unresolved external symbol internal

[MrSmith via Digitalmars-d-learn]

I have a static library and an application.

When linking final executable I get:
lib.lib(texteditor_1d_40c.obj) : error LNK2001: unresolved 
external symbol internal
lib.lib(textbuffer_14_3ce.obj) : error LNK2001: unresolved 
external symbol internal


Happens on Windows 32 and 64 bit.
Only with debug build.
DMD 2.076.0
Error doesn't happen when I move code from library to the 
application.


Here is reduced test case (where 2 errors happen, 4 files): 
https://gist.github.com/MrSmith33/29125fa3538bb03637d0aebab6ccff7c
Here is smaller case (only 1 error, 2 files): 
https://gist.github.com/MrSmith33/dc53d8cb6ce642fcb6dbc5863d029cec



If this is relevant: 3 places I found in dmd where "internal" 
symbol is created:
* 
https://github.com/dlang/dmd/blob/4d86fcba2fd2ef86cc85738cd2ac2b059dbb5800/src/ddmd/backend/dt.c#L420
* 
https://github.com/dlang/dmd/blob/4d86fcba2fd2ef86cc85738cd2ac2b059dbb5800/src/ddmd/tocsym.d#L662
* 
https://github.com/dlang/dmd/blob/4d86fcba2fd2ef86cc85738cd2ac2b059dbb5800/src/ddmd/tocsym.d#L681

Re: initializing a static array

[Daniel Kozak via Digitalmars-d-learn]

Yeah, you are right. My fault.

On Tue, Oct 10, 2017 at 4:47 PM, Adam D. Ruppe via Digitalmars-d-learn <
digitalmars-d-learn@puremagic.com> wrote:

> On Tuesday, 10 October 2017 at 14:42:15 UTC, Daniel Kozak wrote:
>
>> It will return dynamic array. it is same as:
>>
>> double[5] = [0,0,0,0,0]; // this is still dynamicaly allocated.
>>
>
> Not true here, the compiler knows it is going into a static array and puts
> the result directly in there. It handles literals.
>
> The range version though will allocate since the function doesn't know
> where its result ends up. It will CTFE though if the variable is static.
>

Re: initializing a static array

[Adam D. Ruppe via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 14:42:15 UTC, Daniel Kozak wrote:

It will return dynamic array. it is same as:

double[5] = [0,0,0,0,0]; // this is still dynamicaly allocated.


Not true here, the compiler knows it is going into a static array 
and puts the result directly in there. It handles literals.


The range version though will allocate since the function doesn't 
know where its result ends up. It will CTFE though if the 
variable is static.

[Issue 17890] cpp_long is not declared for Posix 64bit

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17890

Илья Ярошенко  changed:

   What|Removed |Added

   Keywords||C++

--

[Issue 17890] New: cpp_long is not declared for Posix 64bit

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17890

  Issue ID: 17890
   Summary: cpp_long is not declared for Posix 64bit
   Product: D
   Version: D2
  Hardware: x86_64
OS: Mac OS X
Status: NEW
  Severity: enhancement
  Priority: P1
 Component: druntime
  Assignee: nob...@puremagic.com
  Reporter: ilyayaroshe...@gmail.com

...
BTW, why c_long is always 32 bit for windows?

--

Re: initializing a static array

[Daniel Kozak via Digitalmars-d-learn]

On Tue, Oct 10, 2017 at 4:15 PM, Simon Bürger via Digitalmars-d-learn <
digitalmars-d-learn@puremagic.com> wrote:

> On Tuesday, 10 October 2017 at 13:48:16 UTC, Andrea Fontana wrote:
>
>> On Tuesday, 10 October 2017 at 13:36:56 UTC, Simon Bürger wrote:
>>
>>> Is there a good way to set them all to zero? The only way I can think of
>>> is using string-mixins to generate a string such as "[0,0,0,0]" with
>>> exactly n zeroes. But that seems quite an overkill for such a basic task. I
>>> suspect I might be missing something obvious here...
>>>
>>
>> Maybe:
>>
>> double[n] bar = 0.repeat(n).array;
>>
>
> This works fine, thanks a lot. I would have expected `.array` to return a
> dynamic array. But apparently the compiler is smart enough to know the
> length. Even the multi-dimensional case works fine:
>
> double[n][n] bar = 0.repeat(n).array.repeat(n).array;
>

It will return dynamic array. it is same as:

double[5] = [0,0,0,0,0]; // this is still dynamicaly allocated.

Re: initializing a static array

[Simon Bürger via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 13:54:16 UTC, Daniel Kozak wrote:

struct Double
{
double v = 0;
alias v this;
}

struct Foo(size_t n)
{
Double[n] bar;
}


Interesting approach. But this might introduce problems later. 
For example `Double` is implicitly convertible to `double`, but 
`Double[]` is not implicitly convertible to `double[]`. Therefore 
I will stick with jmh530's solution for now, but thank you anyway.

Re: initializing a static array

[Simon Bürger via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 13:48:16 UTC, Andrea Fontana wrote:

On Tuesday, 10 October 2017 at 13:36:56 UTC, Simon Bürger wrote:
Is there a good way to set them all to zero? The only way I 
can think of is using string-mixins to generate a string such 
as "[0,0,0,0]" with exactly n zeroes. But that seems quite an 
overkill for such a basic task. I suspect I might be missing 
something obvious here...


Maybe:

double[n] bar = 0.repeat(n).array;


This works fine, thanks a lot. I would have expected `.array` to 
return a dynamic array. But apparently the compiler is smart 
enough to know the length. Even the multi-dimensional case works 
fine:


double[n][n] bar = 0.repeat(n).array.repeat(n).array;

Re: Current limitations of -dip1000

[12345swordy via Digitalmars-d]

On Tuesday, 10 October 2017 at 10:49:54 UTC, meppl wrote:

On Tuesday, 10 October 2017 at 09:55:13 UTC, meppl wrote:

...


also, these differ:
(with dmd v2.076.0)

@safe:
struct S {
@safe:
int* x;
scope int* pointer() return {
return x;
}
}
int* testPointer() {
S s;
return s.pointer(); // no error
}
struct SA {
@safe:
int[ 128] x;
scope int* pointer() return {
return [ 0];
}
}
int* testPointerA() {
SA s;
return s.pointer(); // error
}


Report any bugs to the official bug tracker here: 
https://issues.dlang.org/

Re: initializing a static array

[Andrea Fontana via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 13:53:37 UTC, jmh530 wrote:

double[n] bar;
bar[] = 0;


This works at runtime only for mutable arrays, anyway.

Re: Deprecation message of library functions should state the replacement function

[Seb via Digitalmars-d]

On Tuesday, 10 October 2017 at 12:57:36 UTC, bauss wrote:
On Tuesday, 10 October 2017 at 11:48:48 UTC, Eduard Staniloiu 
wrote:

Hi guys,

I've just build druntime on Windows and we are displaying the 
following deprecation message:


src\core\sys\windows\odbcinst.d(157): Deprecation: function 
core.sys.windows.odbcinst.SQLInstallTranslatorW is deprecated.


I believe that we should also state with what should the 
deprecated function be replaced.


My 2 cents,
Eduard


They usually do, I just assume it was forgotten there and if 
you know which function is to replace it, then simply create a 
pr?


Or simply remove it as it has been deprecated since more than two 
years:


https://github.com/dlang/druntime/blob/8fbcc2d819a84a5340cc6ac724320cae3561cb3b/src/core/sys/windows/odbcinst.d

Re: initializing a static array

[jmh530 via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 13:48:16 UTC, Andrea Fontana wrote:


Maybe:

double[n] bar = 0.repeat(n).array;


Alt:

double[n] bar;
bar[] = 0;

Re: Should we have prettier string printing for exceptions and std elemts?

[Seb via Digitalmars-d]

On Tuesday, 10 October 2017 at 11:17:09 UTC, bauss wrote:
On Monday, 9 October 2017 at 18:52:03 UTC, Petar Kirov 
[ZombineDev] wrote:

On Monday, 9 October 2017 at 17:44:12 UTC, jmh530 wrote:
On Monday, 9 October 2017 at 17:19:42 UTC, Petar Kirov 
[ZombineDev] wrote:



Printing the container
type, address and length would be most useful default IMO (but 
in a better looking way than what we have now for 
std.container.array).


That's your opinion though; IMO I'd rather have the elements 
printed by default.


It's all subjective and thus there's no real reason for one or 
the other.


FWIW I tried to propose a `dump` function one year ago [1].
There has never been a great interest in it though as while using 
`writeln` is a bit annoying (e.g. no spaces, no variable names) 
apparently all core people got used to it already ;-)


If someone considers to add a pretty printing method he/she, this 
new symbol could also be very useful for single elements too (and 
thus gain chances in its acceptance).


[1] 
https://github.com/dlang/phobos/pull/4318#issuecomment-241819997

Re: initializing a static array

[Daniel Kozak via Digitalmars-d-learn]

struct Double
{
double v = 0;
alias v this;
}

struct Foo(size_t n)
{
Double[n] bar;
}

Dne 10. 10. 2017 3:40 odpoledne napsal uživatel "Simon Bürger via
Digitalmars-d-learn" :

I have a static array inside a struct which I would like to be initialized
to all-zero like so

  struct Foo(size_t n)
  {
double[n] bar = ... all zeroes ...
  }

(note that the default-initializer of double is nan, and not zero)

I tried

  double[n] bar = 0;  // does not compile
  double[n] bar = {0}; // neither does this
  double[n] bar = [0]; // compiles, but only sets the first element,
ignoring the rest

Is there a good way to set them all to zero? The only way I can think of is
using string-mixins to generate a string such as "[0,0,0,0]" with exactly n
zeroes. But that seems quite an overkill for such a basic task. I suspect I
might be missing something obvious here...

Re: initializing a static array

[Andrea Fontana via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 13:36:56 UTC, Simon Bürger wrote:
Is there a good way to set them all to zero? The only way I can 
think of is using string-mixins to generate a string such as 
"[0,0,0,0]" with exactly n zeroes. But that seems quite an 
overkill for such a basic task. I suspect I might be missing 
something obvious here...


Maybe:

double[n] bar = 0.repeat(n).array;

Re: how to shorten templates structs name?

[Daniel Kozak via Digitalmars-d-learn]

Use alias this

Dne 10. 10. 2017 1:30 odpoledne napsal uživatel "drug via
Digitalmars-d-learn" :

> using classes I can make an inherited class of templated class and avoid
> too long mangled name:
> ```
> class TemplatedClass(A, Very, Much, Args, Here) { ... }
>
> class ShortenClass : TemplatedClass!(A,Very, Much, Args, Here) { ... };
> ```
> Now ShortenClass has a nice mangling.
>
> What can be done in case of struct?
>

initializing a static array

[Simon Bürger via Digitalmars-d-learn]

I have a static array inside a struct which I would like to be 
initialized to all-zero like so


  struct Foo(size_t n)
  {
double[n] bar = ... all zeroes ...
  }

(note that the default-initializer of double is nan, and not zero)

I tried

  double[n] bar = 0;  // does not compile
  double[n] bar = {0}; // neither does this
  double[n] bar = [0]; // compiles, but only sets the first 
element, ignoring the rest


Is there a good way to set them all to zero? The only way I can 
think of is using string-mixins to generate a string such as 
"[0,0,0,0]" with exactly n zeroes. But that seems quite an 
overkill for such a basic task. I suspect I might be missing 
something obvious here...

Re: New release v0.5 of the D bindings for SAP NetWeaver RFC SDK

[Martin Nowak via Digitalmars-d-announce]

On 10/08/2017 12:59 PM, Kai Nacke wrote:
> The included set of example applications show how easy it is to call an
> RFC. To use the library just add a dependency to your dub.json/dub.sdl
> file or clone the source at https://github.com/redstar/sapnwrfc-d.

Thanks, examples are nice for packages.

Wondering a little about the std. usage, as it seems very unlikely to
ever become standardized.
Why not just use sap. or netweaver. as top level package?

Also I can recommend at least some basic ddoc comments, it's really
trivial to use ddox to get some nice documentation, e.g. see
https://github.com/MartinNowak/bloom.

If you use x:ddoxFilterArgs without "--only-documented", it should even
work for undocumented functions.

-Martin

[Issue 10131] To remove duplicates and keep order

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=10131

Seb  changed:

   What|Removed |Added

 CC||greensunn...@gmail.com

--- Comment #1 from Seb  ---
PR https://github.com/dlang/phobos/pull/5774

--

Re: Deprecation message of library functions should state the replacement function

[bauss via Digitalmars-d]

On Tuesday, 10 October 2017 at 11:48:48 UTC, Eduard Staniloiu 
wrote:

Hi guys,

I've just build druntime on Windows and we are displaying the 
following deprecation message:


src\core\sys\windows\odbcinst.d(157): Deprecation: function 
core.sys.windows.odbcinst.SQLInstallTranslatorW is deprecated.


I believe that we should also state with what should the 
deprecated function be replaced.


My 2 cents,
Eduard


They usually do, I just assume it was forgotten there and if you 
know which function is to replace it, then simply create a pr?

[Issue 17889] Cross platform function to redirect standard input/output

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17889

--- Comment #2 from RazvanN  ---
I was actually refering to dup2:

[1] http://man7.org/linux/man-pages/man2/dup.2.html
[2] https://msdn.microsoft.com/en-us/library/8syseb29.aspx

--

[Issue 17889] Cross platform function to redirect standard input/output

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17889

b2.t...@gmx.com changed:

   What|Removed |Added

 CC||b2.t...@gmx.com

--- Comment #1 from b2.t...@gmx.com ---
What's the relationship between "dup" and "Cross platform function to redirect
standard input/output" ?

--

[Issue 17889] New: Cross platform function to redirect standard input/output

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17889

  Issue ID: 17889
   Summary: Cross platform function to redirect standard
input/output
   Product: D
   Version: D2
  Hardware: x86_64
OS: All
Status: NEW
  Severity: enhancement
  Priority: P1
 Component: phobos
  Assignee: nob...@puremagic.com
  Reporter: razvan.nitu1...@gmail.com

I suggest adding to phobos a wrapper function for dup which works for both
linux and windows.

--

Deprecation message of library functions should state the replacement function

[Eduard Staniloiu via Digitalmars-d]

Hi guys,

I've just build druntime on Windows and we are displaying the 
following deprecation message:


src\core\sys\windows\odbcinst.d(157): Deprecation: function 
core.sys.windows.odbcinst.SQLInstallTranslatorW is deprecated.


I believe that we should also state with what should the 
deprecated function be replaced.


My 2 cents,
Eduard

how to shorten templates structs name?

[drug via Digitalmars-d-learn]

using classes I can make an inherited class of templated class and avoid 
too long mangled name:

```
class TemplatedClass(A, Very, Much, Args, Here) { ... }

class ShortenClass : TemplatedClass!(A,Very, Much, Args, Here) { ... };
```
Now ShortenClass has a nice mangling.

What can be done in case of struct?

Re: Should we have prettier string printing for exceptions and std elemts?

[bauss via Digitalmars-d]

On Monday, 9 October 2017 at 18:52:03 UTC, Petar Kirov 
[ZombineDev] wrote:

On Monday, 9 October 2017 at 17:44:12 UTC, jmh530 wrote:
On Monday, 9 October 2017 at 17:19:42 UTC, Petar Kirov 
[ZombineDev] wrote:



Printing the container
type, address and length would be most useful default IMO (but 
in a better looking way than what we have now for 
std.container.array).


That's your opinion though; IMO I'd rather have the elements 
printed by default.


It's all subjective and thus there's no real reason for one or 
the other.

[Issue 11577] Template std.typetuple.NoDuplicates removes const types for classes and structs

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=11577

--- Comment #1 from alex.jercai...@gmail.com ---
What would be the correct behaviour here?
Should it treat the const and nonconst as duplicates?

--

Re: Current limitations of -dip1000

[meppl via Digitalmars-d]

On Tuesday, 10 October 2017 at 09:55:13 UTC, meppl wrote:

...


also, these differ:
(with dmd v2.076.0)

@safe:
struct S {
@safe:
int* x;
scope int* pointer() return {
return x;
}
}
int* testPointer() {
S s;
return s.pointer(); // no error
}
struct SA {
@safe:
int[ 128] x;
scope int* pointer() return {
return [ 0];
}
}
int* testPointerA() {
SA s;
return s.pointer(); // error
}

Re: Current limitations of -dip1000

[meppl via Digitalmars-d]

On Tuesday, 10 October 2017 at 02:37:21 UTC, Walter Bright wrote:

On 10/9/2017 8:04 AM, Per Nordlöw wrote:

...


Get rid of the templates, too. Replace T with int. Get rid of 
any of the layers of confusing complexity.

...


this looks like an issue to me. If its a template the pointer can 
escape. The non-template-version doesnt let the pointer escape


@safe:
struct ST( T) {
@safe:
T[ 128] x;
scope ref T front() return {
return x[ 0];
}
scope T* pointer() return {
return [ 0];
}
}
ref int testFrontT() {
ST!int s;
return s.front(); // pointer escapes
}
int* testPointerT() {
ST!int s;
return s.pointer(); // pointer escapes
}

struct S {
@safe:
int[ 128] x;
scope ref int front() return {
return x[ 0];
}
scope int* pointer() return {
return [ 0];
}
}
ref int testFront() {
S s;
return s.front(); // error
}
int* testPointer() {
S s;
return s.pointer(); // error
}

Re: How do I filter out data from mongodb in D-code

[Anders S via Digitalmars-d]

On Tuesday, 10 October 2017 at 09:43:10 UTC, Anders S wrote:
I'm working on a middleware application that reads array of 
data from a POSIX pipe and insert data into the db if any 
position in the array has changed.
This is where my problem lays, in order not to duplicate data I 
want to fetch the latest data/document in the array of 
documents.


To clarify,
This is where my problem lays, in order not to duplicate data I 
want to fetch the >latest data/document in the array of 
documents.
refers to latest inserted data/document in the mongodb 
collection. Also that the insert of document that changed include 
a timestamp like this

dateAdded: new Date()

How do I filter out data from mongodb in D-code

[Anders S via Digitalmars-d]

Hi,

I'm working on a middleware application that reads array of data 
from a POSIX pipe and insert data into the db if any position in 
the array has changed.
This is where my problem lays, in order not to duplicate data I 
want to fetch the latest data/document in the array of documents.

I'm using MS Code and dub to code and compile.

This is the code:
Collection ct = mongo.boxweb.celltab;
int i = 1;
for(;i < 10; i++ ){
   auto cell = 
ct.find({"number":i}).sort({_id:-1}).limit(2).pretty();
   if (insert...


   i++;

Where "number" is the document nr in the array

I get these errors
source/app.d(166,54): Error: found : when expecting ; following 
statement
source/app.d(166,56): Error: found } when expecting ; following 
statement

source/app.d(166,57): Error: found ) instead of statement
dmd failed with exit code 1.

Any ideas?
Isn't there a way to markup code in the forum message to separate 
from the bodytext?


/anders

Re: Catching C++ Exceptions in D - Windows and Linux

[Laeeth Isharc via Digitalmars-d-learn]

On Tuesday, 12 September 2017 at 04:33:30 UTC, Nicholas Wilson 
wrote:
On Tuesday, 12 September 2017 at 03:51:45 UTC, Laeeth Isharc 
wrote:

Hi.

I'm here in HK with Ilya, Atila, John Colvin, and Jonathan 
Davis.
 I wondered what the current state of D catching C++ 
exceptions was on Linux and Windows.  I know that some work 
was done on making this possible, and my understanding is that 
it is, more or less - just wondered what the rough corners 
might be.


Thanks.


Laeeth.


IIRC I remember Walter saying that we should only bother to be 
able to catch C++ exceptions derived from std::exception, as 
opposed to say ints or strings. I believe the line was "those 
who throw ints should get what they deserve".


Apart from that I believe they should "just work", although I 
haven't tested.


OT I'm sorry I could make it to HK, I'm busy with uni all this 
week. I could possibly do telepresence though.


Nic


Thanks, Nic.  Sorry about the dates - was arranged last minute.  
I'll drop you a line shortly in any case.



Laeeth.

Some tasks in D app

[Orkhan via Digitalmars-d]

Hello. I have an app for multiplayer game website. I am Facing an 
issue about stacking terminal. Also the app does not save the 
logs which is supposed to.  I need someone who can fix this. Will 
send the app to developer.


in total The tasks are :
1) Fix stacking issue in the terminal,
2) Fix saving logs
3) Fix the reconnection issue (during the game if one of the 
opponent has left the game then another opponent sees the pop up 
window which says  "please wait while your opponent reconnect". 
But the problem is server does not reconnects the disconnected 
user when he comes back.
4) The same username can be logged in the server. we need to 
prevent this case. if the user is already in the server, then it 
shouldnt be allowed him to login again.


We have allocated budget for all these tasks. In total we are 
going to pay 200-250$.

Please contact me by email if you are interested :
a.mammad...@liverpool.ac.uk

Regards

Re: "This week in D" state

[Joakim via Digitalmars-d]

On Tuesday, 10 October 2017 at 07:12:19 UTC, Eliatto wrote:
I noticed that "This week in D" site was seldom updated. Last 
activity is September, the 3rd. If Adam is busy at the moment, 
then I think that he should have an assistant.


I think he's lost interest, even when he does post, he rarely 
puts up anything more than forum links this year.  I don't blame 
him, it's a thankless job.  That's why I suggested merging it 
with the blog last year, but for whatever reason that hasn't 
happened:


http://forum.dlang.org/thread/mkxsvwxmusxifunpf...@forum.dlang.org

Re: How to call function with variable arguments at runtime?

[Marc Schütz via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 02:58:45 UTC, Mr. Jonse wrote:
I need to store a hetrogeneous array of delegates. How can I do 
this but still call the function with the appropriate number of 
parameters at run time?


I have the parameters as Variant[] params and a 
function/delegate pointer(void* for now).


Normally I'd push the parameters on the stack and use a call, 
but I'm sure D has some ability to do this, like apply(foo, 
args) would be the same as foo(args[0], ..., args[1]).


I'm not concerned about type correctness, it should always be 
consistent between what I call and what is stored.


Thanks.


Like so?

import std.variant;

void foo(int a, string b, float c) {
import std.stdio;
writefln("a = %s, b = %s, c = %s", a, b, c);
}

auto apply(alias fn)(Variant[] values) {
import std.traits : ParameterTypeTuple;
import std.conv : emplace;
alias Types = ParameterTypeTuple!fn;
assert(values.length == Types.length);
Types args = void;
foreach(i, ref arg; args) {
// using emplace instead of assignment here to be fully 
correct

emplace!(typeof(arg))(, values[i].get!(typeof(arg)));
}
return fn(args);
}

void main() {
Variant[] values = [Variant(1), Variant("Hello world"), 
Variant(3.14159f)];

apply!foo(values);
}

Re: How to call function with variable arguments at runtime?

[bauss via Digitalmars-d-learn]

On Tuesday, 10 October 2017 at 02:58:45 UTC, Mr. Jonse wrote:
I need to store a hetrogeneous array of delegates. How can I do 
this but still call the function with the appropriate number of 
parameters at run time?


I have the parameters as Variant[] params and a 
function/delegate pointer(void* for now).


Normally I'd push the parameters on the stack and use a call, 
but I'm sure D has some ability to do this, like apply(foo, 
args) would be the same as foo(args[0], ..., args[1]).


I'm not concerned about type correctness, it should always be 
consistent between what I call and what is stored.


Thanks.


Not entirely sure what you're wanting to do, but sounds a lot 
like variadic parameters.



https://dlang.org/spec/function.html#variadic mixed with some 
compile-time terminology.

Re: How to make commented code to compile?

[bauss via Digitalmars-d-learn]

On Monday, 9 October 2017 at 15:22:54 UTC, Adam D. Ruppe wrote:

On Monday, 9 October 2017 at 15:15:48 UTC, Zhuo Nengwen wrote:

test(cast(ushort) 1, (m, c) => {
  writeln(m);
  writeln(m);
});


Just remove the =>

(m, c) {
  // code here
}


Common mistake from people who worked with LINQ in C#.

"This week in D" state

[Eliatto via Digitalmars-d]

I noticed that "This week in D" site was seldom updated. Last 
activity is September, the 3rd. If Adam is busy at the moment, 
then I think that he should have an assistant.

[Issue 17797] [REG 2.073.2] double print to stdout when reading stdin in another thread

[d-bugmail--- via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17797

Rainer Schuetze  changed:

   What|Removed |Added

 CC||r.sagita...@gmx.de

--- Comment #4 from Rainer Schuetze  ---
I could verify it happens with 2.073.2, but not 2.073.1. This is caused by an
updated snn.lib. Might be introduced by the fix for issue 13727.

--