Tuesday, December 3, 2019

Digest for comp.lang.c++@googlegroups.com - 18 updates in 3 topics

T <T@invalid.invalid>: Dec 02 09:02PM -0800

Hi All,
 
I write in Perl6. I wrote a module to give me a pop up
in Windows to send information to the user. It uses
a native call and I do believe it is a C++ call, but I
really don't know what I am doing when it comes to
anything C.
 
Do any of you guys know how to add a time out to the
pop up? I do believe it would be in the choice of the
constants.
 
Many thanks,
-T
 
 
<WinMsg.pm6>
# unit module WinMsg;
# WinMsg.pm6
 
#`{
Reference:
 
https://stackoverflow.com/questions/59105696/how-can-i-create-pop-up-windows-for-perl6-in-windows
}
 
use NativeCall;
 
sub WinMsg( Str $TitleStr, Str $MessageStr ) is export( :WinMsg ) {
#`{
 
Pop up a message box to the user. Windows only.
Test one liner:
perl6 -e "use lib '.'; use WinMsg :WinMsg; WinMsg( 'Super Duper
Title', 'What? You were expecting something witty?' );"
 
}
 
my $SubName = &?ROUTINE.name;
my $OS = $*KERNEL.name;
if not $OS eq "win32" { say "Sorry, $SubName only work in Windows.";
exit; }
 
constant WCHAR = uint16;
constant INT = int32;
constant UINT = uint32;
constant HANDLE = Pointer[void];
constant LPWCTSTR = CArray[WCHAR];
constant MB_ICONEXCLAMATION = 0x00000030;
 
# Note: the following two subs have to be embedded
 
sub MessageBoxW( HANDLE, LPWCTSTR, LPWCTSTR, UINT ) is
native('user32') returns INT { * };
 
sub to-c-str( Str $str ) returns CArray[WCHAR] {
my @str := CArray[WCHAR].new;
for ( $str.comb ).kv -> $i, $char { @str[$i] = $char.ord; }
@str[ $str.chars ] = 0;
@str;
}
 
# MessageBoxW( my $handle, to-c-str("๘❤ Raku is awesome ❤๖"),
to-c-str("Hellö Wαrld"), MB_ICONEXCLAMATION );
 
MessageBoxW( my $handle, to-c-str( $MessageStr ), to-c-str(
$TitleStr ), MB_ICONEXCLAMATION );
}
</WinSmg/pm6>
Paavo Helde <myfirstname@osa.pri.ee>: Dec 03 10:13AM +0200

On 3.12.2019 7:02, T wrote:
> a native call and I do believe it is a C++ call, but I
> really don't know what I am doing when it comes to
> anything C.
 
C and C++ are two different languages. Windows SDK interface is defined
in C, not C++.
 
> constants.
> MessageBoxW( my $handle, to-c-str( $MessageStr ), to-c-str(
> $TitleStr ), MB_ICONEXCLAMATION );
 
MessageBoxW is documented at
"https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-messagebox"
- it does not mention any timeout.
 
I have written some code for a "Windows popup with timeout" in C++, but
I doubt it will help you. It displays the message box in a separate
thread, while the main thread waits for it on a condition variable with
a timeout.
 
I guess you would get better responses in forums where Perl or Windows
are on topic.
T <T@invalid.invalid>: Dec 03 01:17AM -0800

On 2019-12-03 00:13, Paavo Helde wrote:
> a timeout.
 
> I guess you would get better responses in forums where Perl or Windows
> are on topic.
 
Hi Paavo,
 
Now I know were and what is going on with my MessageBoxW call.
 
On your reference, I also found MessageBoxIndirectA and
MessageBoxIndirectW. Maybe they will work. It is worth
experimenting!
 
Thank you!
 
-T
"Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com>: Dec 03 11:08AM +0100

On 03.12.2019 06:02, T wrote:
> a native call and I do believe it is a C++ call, but I
> really don't know what I am doing when it comes to
> anything C.
 
Perl code that calls a C function in the Windows API.
 
Naturally that's best asked about in a C++ language group.
 
 
> Do any of you guys know how to add a time out to the
> pop up?  I do believe it would be in the choice of the
> constants.
 
No, `MessageBox` and immediate closest family does not support any timeouts.
 
It may be that this JScript snippet, using the some of the COM-based
scripting support in the Windows API, can help you:
 
var WshShell = WScript.CreateObject("WScript.Shell");
var BtnCode = WshShell.Popup("Do you feel alright?", 7, "Answer
This Question:", 4 + 32);
switch(BtnCode) {
case 6:
WScript.Echo("Glad to hear you feel alright.");
break;
case 7:
WScript.Echo("Hope you're feeling better soon.");
break;
case -1:
WScript.Echo("Is there anybody out there?");
break;
}
 
Here "7" is the number of seconds before the message box closes
automatically, and "WScript.Shell" is a COM programmatic ID, which you
maybe can use with the relevant COM object creation functionality in
Perl, if there is.
 
 
> Many thanks,
 
Oh, don't mention it.
 
- Alf
T <T@invalid.invalid>: Dec 03 03:06AM -0800

On 2019-12-03 02:08, Alf P. Steinbach wrote:
 
>> Many thanks,
 
> Oh, don't mention it.
 
> - Alf
 
 
Thank you!
Geoff <geoff@invalid.invalid>: Dec 03 12:28PM -0800

>constants.
 
>Many thanks,
>-T
 
There is no provision for a timeout in any message box in Windows.
However, you can probably use SetTimer in the initialization of the
message box with a pointer to a TimerProc and when the timer expires
the TimerProc function can send a WM_COMMAND message to the message
box.
T <T@invalid.invalid>: Dec 03 02:14PM -0800

On 2019-12-03 12:28, Geoff wrote:
> message box with a pointer to a TimerProc and when the timer expires
> the TimerProc function can send a WM_COMMAND message to the message
> box.
 
That explains it. Thank you!
 
I am spoiled by Linux's send-notify.
Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk>: Dec 03 05:05PM

On 01/12/2019 17:33, Christian Gollwitzer wrote:
>> capable of defining the syntax of any
 
>> context-free grammar:
> here is your problem: C is not context free. It is usually dealt with the "lexer hack" to use a parser for context-free grammar.
 
neos can compile code for languages which aren't definable using a context free grammar; neos also deals with BOTH the syntax AND the semantics of a language.
 
> Also, parsing the syntax is only a minor step in most actual compilers. The big pile of work is in the optimizer (which is in theory optional) and the code generator, and another big pile is in the library. Pure C without the library is good for nothing.
 
> That's why most regulars in this group are rather sceptical of Flibble's project. A more realistic approach would sit on top of LLVM, where years of work have been done already.
 
Try speaking for yourself and not for others unless you own some kind of fucking crystal ball.
 
/Flibble
 
--
"Snakes didn't evolve, instead talking snakes with legs changed into snakes." - Rick C. Hodgin
 
"You won't burn in hell. But be nice anyway." – Ricky Gervais
 
"I see Atheists are fighting and killing each other again, over who doesn't believe in any God the most. Oh, no..wait.. that never happens." – Ricky Gervais
 
"Suppose it's all true, and you walk up to the pearly gates, and are confronted by God," Byrne asked on his show The Meaning of Life. "What will Stephen Fry say to him, her, or it?"
"I'd say, bone cancer in children? What's that about?" Fry replied.
"How dare you? How dare you create a world to which there is such misery that is not our fault. It's not right, it's utterly, utterly evil."
"Why should I respect a capricious, mean-minded, stupid God who creates a world that is so full of injustice and pain. That's what I would say."
boltar@nowhere.co.uk: Dec 03 05:09PM

On Tue, 3 Dec 2019 17:05:03 +0000
>work have been done already.
 
>Try speaking for yourself and not for others unless you own some kind of
>fucking crystal ball.
 
I'll speak for me - I'm sure your project is fun and important for you, but no
one else gives a rats arse.
Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk>: Dec 03 06:03PM

>> fucking crystal ball.
 
> I'll speak for me - I'm sure your project is fun and important for you, but no
> one else gives a rats arse.
 
You just contradicted yourself, dear.
 
/Flibble
 
--
"Snakes didn't evolve, instead talking snakes with legs changed into snakes." - Rick C. Hodgin
 
"You won't burn in hell. But be nice anyway." – Ricky Gervais
 
"I see Atheists are fighting and killing each other again, over who doesn't believe in any God the most. Oh, no..wait.. that never happens." – Ricky Gervais
 
"Suppose it's all true, and you walk up to the pearly gates, and are confronted by God," Byrne asked on his show The Meaning of Life. "What will Stephen Fry say to him, her, or it?"
"I'd say, bone cancer in children? What's that about?" Fry replied.
"How dare you? How dare you create a world to which there is such misery that is not our fault. It's not right, it's utterly, utterly evil."
"Why should I respect a capricious, mean-minded, stupid God who creates a world that is so full of injustice and pain. That's what I would say."
"Öö Tiib" <ootiib@hot.ee>: Dec 02 03:39PM -0800

On Monday, 2 December 2019 23:17:41 UTC+2, Melzzzzz wrote:
> goal is safety in that kind of safety Rust is ok choice.
> There were times I loved it (beginnings) then hated it, then I love it
> again. One cannot be indeferent to Rust, that's for sure.
 
Who knows? Google has Go and Apple has Swift so perhaps Microsoft
also wants to have some garbage-free programming language.
The syntax of Rust is not that different from Swift or Go.
However the compiler feels like impressive effort of limiting
ways to express nonsense. Actually what does it matter how
easy it is to write some incoherent and buggy programs? There
are no such "gotcha!" bear traps in Rust like C++ is full of
and so it perhaps suits novices better than C++.
Pankaj Jangid <p4j@j4d.net>: Dec 03 09:21AM +0530

Actually, it is considering implementing a new language inspired by
Rust. https://www.zdnet.com/article/microsoft-were-creating-a-new-rust-based-programming-language-for-secure-coding/
 
--
Pankaj Jangid
Cholo Lennon <chololennon@hotmail.com>: Dec 03 02:03AM -0300

On 12/3/19 12:51 AM, Pankaj Jangid wrote:
> Actually, it is considering implementing a new language inspired by
> Rust. https://www.zdnet.com/article/microsoft-were-creating-a-new-rust-based-programming-language-for-secure-coding/
 
OMG! I didn't know that, another programming language and what's worse,
created/sponsored by Microsoft :-O
 
I've already seen this several times... a company needs to have the
control of the tool (Microsoft/VisualBasic/VisualJ/C#/TypeScript/F#,
Sun/Java, Google/Go/Dart, JetBrains/Kotlin, etc)
 
 
--
Cholo Lennon
Bs.As.
ARG
gazelle@shell.xmission.com (Kenny McCormack): Dec 03 09:40AM

In article <qs4qb5$1qt5$1@gioia.aioe.org>,
 
>I've already seen this several times... a company needs to have the
>control of the tool (Microsoft/VisualBasic/VisualJ/C#/TypeScript/F#,
>Sun/Java, Google/Go/Dart, JetBrains/Kotlin, etc)
 
Not Invented Here Syndrome.
 
--
Just for a change of pace, this sig is *not* an obscure reference to
comp.lang.c...
David Brown <david.brown@hesbynett.no>: Dec 03 11:40AM +0100

On 03/12/2019 10:40, Kenny McCormack wrote:
>> control of the tool (Microsoft/VisualBasic/VisualJ/C#/TypeScript/F#,
>> Sun/Java, Google/Go/Dart, JetBrains/Kotlin, etc)
 
> Not Invented Here Syndrome.
 
Not /Controlled/ Here Syndrome.
 
MS were quite happy to support Java as long as they could make their own
incompatible version. When the courts said they were not allowed to do
that (and still call it "Java"), they went off in a huff and made C# as
their own alternative to Java which /they/ controlled.
 
(I don't think MS are as bad at this as they used to be, and I am not
implying that other companies are necessarily better.)
gazelle@shell.xmission.com (Kenny McCormack): Dec 03 11:33AM

In article <qs5e3e$91s$1@dont-email.me>,
David Brown <david.brown@hesbynett.no> wrote:
...
>incompatible version. When the courts said they were not allowed to do
>that (and still call it "Java"), they went off in a huff and made C# as
>their own alternative to Java which /they/ controlled.
 
Well, they controlled it because they had invented it.
 
I don't think we really disagree much here.
 
P.S. People often talk as if C# was invented by itself, as a standalone
language. In fact, C# is just one member of the .NET/CLR family. I think
of VB.NET as the primary .NET language. I suppose C# comes next after VB.
 
--
To my knowledge, Jacob Navia is not a Christian.
 
- Rick C Hodgin -
David Brown <david.brown@hesbynett.no>: Dec 03 04:24PM +0100

On 03/12/2019 12:33, Kenny McCormack wrote:
>> that (and still call it "Java"), they went off in a huff and made C# as
>> their own alternative to Java which /they/ controlled.
 
> Well, they controlled it because they had invented it.
 
Actually, I believe a fair amount of the work on dotnet / CLR was by
Borland originally, within their Delphi range. But I am not sure about
that (and it's getting a good deal off-topic here, even though they made
C++ compilers).
 
 
> I don't think we really disagree much here.
 
Not much, no, but you have the logic reversed. It is not "MS made C#,
so they get to control that language" - it is "MS wanted a language they
controlled, so they made C#".
 
Manfred <noname@add.invalid>: Dec 03 05:13PM +0100

On 12/3/2019 4:24 PM, David Brown wrote:
> Borland originally, within their Delphi range. But I am not sure about
> that (and it's getting a good deal off-topic here, even though they made
> C++ compilers).
 
C# was developed "originally" by Microsoft, but the lead architect of
the project was (still is?) Anders Hejlsberg, who formerly was the chief
architect of Turbo Pascal and Delphi at Borland.
 
 
> Not much, no, but you have the logic reversed. It is not "MS made C#,
> so they get to control that language" - it is "MS wanted a language they
> controlled, so they made C#".
 
Sounds pretty much like two sides of the same story.
 
Bottom line is that they control the runtime, so they ensure that C#
applications need the Windows ecosystem to run (Mono looks far too
limited as far as I have seen).
 
 
>> P.S. People often talk as if C# was invented by itself, as a standalone
>> language. In fact, C# is just one member of the .NET/CLR family. I think
>> of VB.NET as the primary .NET language. I suppose C# comes next after VB.
 
I think VB.NET was the primary target from the marketing point of view,
i.e. VB is a huge market for Microsoft, thus of primary relevance.
I doubt that C# can be seen as a derivative of VB.NET (which I know
little about, I have to admit), although contamination is evident.
I think it is mostly because of the need for interoperability, rather
than language derivation, though - one of the goals of C# was to talk
easily with VB and remove the complexity of COM.
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