Re: miscellaneous array questions...
On 7/20/20 8:16 PM, a...@a.com wrote:
>> 3) Lastly, In the following code snippet, is arrayA and arrayB both
>> allocated on the stack?
arrayA is allocated on thread-local storage and lives as long as the
program is active. I guess a final interaction with it can be in a
'static ~this()' or a 'shared static ~this()' block.
Note that this is different from e.g. C++: In that language, arrayA
would be a "global" variable and there would be a single instance of it.
In D, there will be as many arrayA variables as there are active
threads. (One thread's modification to its own arrayA is not seen by
other threads.)
arrayB is allocated on the stack and lives as long as the scope that it
is defined inside. That scope is main's body in your code.
> And how does their scopes and/or lifetimes
>> differ?
>>
>> module1 =
>> int[100] arrayA;
>> void main()
>> {
>> int[100] arrayB;
>> // ...
>> }
>> module1 =
Ali
Re: miscellaneous array questions...
On Monday, 20 July 2020 at 22:05:35 UTC, WhatMeWorry wrote:
1) The D Language Reference says:
"There are four kinds of arrays..." with the first example being
"type* Pointers to data" and "int* p; etc.
At the risk of sounding overly nitpicky, isn't a pointer to an
integer simply a pointer to an integer? How does that pertain
to an array?
2) "The total size of a static array cannot exceed 16Mb" What
limits this? And with modern systems of 16GB and 32GB, isn't
16Mb excessively small? (an aside: shouldn't that be 16MB in
the reference instead of 16Mb? that is, Doesn't b = bits and B
= bytes)
3) Lastly, In the following code snippet, is arrayA and arrayB
both allocated on the stack? And how does their scopes and/or
lifetimes differ?
module1 =
int[100] arrayA;
void main()
{
int[100] arrayB;
// ...
}
module1 =
1) Pointers can be used as arrays with the [] operator, int* p =
arrayA.ptr; assert(*(p + 99) == p[99]); should access the same
element.
http://ddili.org/ders/d.en/pointers.html ("Using pointers with
the array indexing operator []")
2) I've encountered this problem too, it's arbitrary AFAIK but it
can be circumvented with dynamic arrays.
Re: How Install and Configure DCD (D Completion Daemon) on Sublime Text?
On Monday, 20 July 2020 at 18:08:02 UTC, Marcone wrote: How Install and Configure DCD (D Completion Daemon) on Sublime Text? I need auto complete for the Dlang in Sublime Text. Recently tried sublime myself for D since its quite lightweight compared to VS code for when I need to write something quick. Turns out most of the packages are outdated as everyone moved from it to something else...VS Code. See https://wiki.dlang.org/IDEs if you want alternatives.
Re: std.process - avoid interaction with parent shell
On Monday, 20 July 2020 at 20:55:52 UTC, Steven Schveighoffer wrote: I don't want any user interaction. Occasionally, I get a repository that no longer exists (404). Then git comes up and asks for a username/password. I want it to just fail. Apparently git has no option to be non-interactive, it supposedly checks stdin to see if it's a tty, and only errors if it's not. -Steve Try setting GIT_TERMINAL_PROMPT=0 as an environment variable.
miscellaneous array questions...
1) The D Language Reference says:
"There are four kinds of arrays..." with the first example being
"type* Pointers to data" and "int* p; etc.
At the risk of sounding overly nitpicky, isn't a pointer to an
integer simply a pointer to an integer? How does that pertain to
an array?
2) "The total size of a static array cannot exceed 16Mb" What
limits this? And with modern systems of 16GB and 32GB, isn't 16Mb
excessively small? (an aside: shouldn't that be 16MB in the
reference instead of 16Mb? that is, Doesn't b = bits and B =
bytes)
3) Lastly, In the following code snippet, is arrayA and arrayB
both allocated on the stack? And how does their scopes and/or
lifetimes differ?
module1 =
int[100] arrayA;
void main()
{
int[100] arrayB;
// ...
}
module1 =
Re: std.process - avoid interaction with parent shell
On Monday, 20 July 2020 at 20:55:52 UTC, Steven Schveighoffer wrote: I tried redirecting /dev/null to stdin when executing my application (and I assumed that would pass onto the process child), but it still asks. What am I doing wrong? Generically, I think you want to detach the program from the current terminal (as well as doing the above). I think setsid can be used for this purpose. Specifically, checking git's source code, I see that setting the environment variable GIT_TERMINAL_PROMPT to 0 will disable password prompts.
Re: How spand array for use with functions arguments like tuple?
On Monday, 20 July 2020 at 17:59:06 UTC, Marcone wrote: On Sunday, 19 July 2020 at 23:05:45 UTC, Marcone wrote: How spand array for use with functions arguments like tuple? expand* If the array is a compile-time constant, you can use aliasSeqOf [1]. Otherwise, you can't. [1] http://dpldocs.info/experimental-docs/std.meta.aliasSeqOf.html
Re: std.process - avoid interaction with parent shell
On Monday, 20 July 2020 at 21:44:31 UTC, Steven Schveighoffer wrote: I think you might be right. I don't know how it's accessing my terminal, but clearly it can keep doing so even without any handles open. Probably /dev/tty
Re: std.process - avoid interaction with parent shell
On 7/20/20 5:24 PM, H. S. Teoh wrote: On Mon, Jul 20, 2020 at 04:55:52PM -0400, Steven Schveighoffer via Digitalmars-d-learn wrote: I am doing some scripting via D, and using std.process.execute to git clone things. I don't want any user interaction. Occasionally, I get a repository that no longer exists (404). Then git comes up and asks for a username/password. I want it to just fail. Apparently git has no option to be non-interactive, it supposedly checks stdin to see if it's a tty, and only errors if it's not. Try --no-pager perhaps? Not sure if that would help, since this isn't technically a pager that's prompting you. Another way is to take a look at std.process.execute's implementation. I believe it's just a wrapper around spawnProcess. What you want is to adapt that implementation so that it closes stdin before fork-n-exec'ing git; that should stop any prompts. I ran the git command from the shell directly with < /dev/null and it still can ask for username/password. I don't know if it's possible to prevent it. One thing to be aware of is that it may not necessarily be git itself that's prompting you; it could be a helper program like a password manager that creates the prompt. In that case you probably have to find out what it is, and disable it somehow (usually by overriding some environment variable that gets passed to the git child process). I think you might be right. I don't know how it's accessing my terminal, but clearly it can keep doing so even without any handles open. I'm even using ctrl-D and it continues to come up with prompts and wait for input. I was able to solve it by backgrounding the process, and then quitting the parent shell, then it had no option but to error ;) I'm still interested in knowing how this works, if anyone knows. Searching for things like "how does git access my terminal when I closed stdin" doesn't give me much information. -Steve
Re: std.process - avoid interaction with parent shell
On Mon, Jul 20, 2020 at 04:55:52PM -0400, Steven Schveighoffer via Digitalmars-d-learn wrote: > I am doing some scripting via D, and using std.process.execute to git > clone things. > > I don't want any user interaction. Occasionally, I get a repository > that no longer exists (404). Then git comes up and asks for a > username/password. I want it to just fail. Apparently git has no > option to be non-interactive, it supposedly checks stdin to see if > it's a tty, and only errors if it's not. Try --no-pager perhaps? Not sure if that would help, since this isn't technically a pager that's prompting you. Another way is to take a look at std.process.execute's implementation. I believe it's just a wrapper around spawnProcess. What you want is to adapt that implementation so that it closes stdin before fork-n-exec'ing git; that should stop any prompts. One thing to be aware of is that it may not necessarily be git itself that's prompting you; it could be a helper program like a password manager that creates the prompt. In that case you probably have to find out what it is, and disable it somehow (usually by overriding some environment variable that gets passed to the git child process). T -- Ph.D. = Permanent head Damage
std.process - avoid interaction with parent shell
I am doing some scripting via D, and using std.process.execute to git clone things. I don't want any user interaction. Occasionally, I get a repository that no longer exists (404). Then git comes up and asks for a username/password. I want it to just fail. Apparently git has no option to be non-interactive, it supposedly checks stdin to see if it's a tty, and only errors if it's not. I tried redirecting /dev/null to stdin when executing my application (and I assumed that would pass onto the process child), but it still asks. What am I doing wrong? e.g.: myapp < /dev/null Username for 'https://github.com': Program pauses, waits for my input. -Steve
Re: What would be the advantage of using D to port some games?
On Monday, 20 July 2020 at 19:49:52 UTC, RegeleIONESCU wrote: Hello! I was wondering why some game related packages/libraries are not being developed anymore or are kind of paused. Fore example the last version of derelict-sdl2 is an alpha from May 2018. Lack of people to develop it, to take care of it or is kind of language focus shift? The derelict-* packages are being superseded by bindbc-* packages as far as I know, so bindbc-sdl is probably what you want now: https://code.dlang.org/packages/bindbc-sdl
Re: What would be the advantage of using D to port some games?
On Wednesday, 24 June 2020 at 21:14:35 UTC, matheus wrote: On Wednesday, 24 June 2020 at 19:46:55 UTC, IGotD- wrote: . Hello! I was wondering why some game related packages/libraries are not being developed anymore or are kind of paused. Fore example the last version of derelict-sdl2 is an alpha from May 2018. Lack of people to develop it, to take care of it or is kind of language focus shift?
Accurately serializing and deserializing a SysTime in binary format
I'm currently implementing a small open source backup tool (dub), and therefore I need to accurately store the file modification SysTime in binary format, so that I can later load this SysTime from the snapshot file to compare it with the current file modification SysTime. Having unfortunately not understood how to do this from the SysTime documentation, in despair, I've tried to directly serialize the 16 bytes of the SysTime value. This worked fine until I call the ".toISOString()" on the deserialized SysTime, which inevitably crashes the executable ;) Anyway, that's not really want I intended to do, as in practice a "ulong" already has enough resolution for that purpose. So sorry for my ignorance, but I would definitely need some help on how to : - convert a file modification SysTime to a serializable number, for instance the number of hectonanoseconds since 1/1/1970 in UTC; - convert that number back into a SysTime that I can compare to the modification SysTime of the same file. Eric
How Install and Configure DCD (D Completion Daemon) on Sublime Text?
How Install and Configure DCD (D Completion Daemon) on Sublime Text? I need auto complete for the Dlang in Sublime Text.
Re: How spand array for use with functions arguments like tuple?
On Sunday, 19 July 2020 at 23:05:45 UTC, Marcone wrote: How spand array for use with functions arguments like tuple? expand*
Re: alias restriction??!
On Monday, 20 July 2020 at 17:24:56 UTC, Carl Sturtivant wrote: Well perhaps you do parse a "constant-offset expression" i.e. syntactically dotted with constant indexes, like name1.name2[constant].name3 and then later there's a semantic check that the "constant-offset expression" involves no indirections when an offset into the top level object is computed. Then it's treated like any other attribute of a struct with a known offset. Perhaps this could also work for a class at the top with recursively embedded structs and value arrays.
Re: alias restriction??!
On Sunday, 19 July 2020 at 20:46:19 UTC, Steven Schveighoffer wrote: On 7/19/20 4:21 PM, Carl Sturtivant wrote: Perhaps what's needed is something more that is less than allowing aliases for expressions in the wide sense you suggest here. I agree. Something not yet mentioned is that aliases provide direct access to the symbols for the purposes of looking at attributes -- something that a wrapper function doesn't provide. The question is: how do you restrict it to explicit data items within a specific aggregate without parsing arbitrary expressions? Well perhaps you do parse a "constant-offset expression" i.e. syntactically dotted with constant indexes, like name1.name2[constant].name3 and then later there's a semantic check that the "constant-offset expression" involves no indirections when an offset into the top level object is computed. Then it's treated like any other attribute of a struct with a known offset.
Re: Is there a compiler option to list all functions executed at compile time when compiling a file?
On Monday, 20 July 2020 at 16:01:53 UTC, blizzard wrote: I am trying to learn D and knowing when code is run at compile time would be good for learning what functions can be used without thinking much about performance. No function is ever run at compile time unless you specifically request it with some kind of static context, like top-level in a module or class declaration, putting the static keyword on the variable, passing it to a !() template argument, or using the enum keyword.
Is there a compiler option to list all functions executed at compile time when compiling a file?
I am trying to learn D and knowing when code is run at compile time would be good for learning what functions can be used without thinking much about performance.
Re: Garbage collection
On Tuesday, 30 June 2020 at 06:16:26 UTC, Kagamin wrote: On Saturday, 27 June 2020 at 14:49:34 UTC, James Gray wrote: I have produced something which essentially reproduces my problem. What is the problem? Do you have a leak or you want to know how GC works? I have managed to resolve my problem (which was a memory leak). My code uses a large data structure similar to a link list and the garbage collector was not collecting it. However, if I set all the "links" between the nodes in the data structure to null it is then collected.
Re: Ada-Style Modulo Integer Types
On Friday, 22 April 2016 at 19:52:46 UTC, Nordlöw wrote: On Friday, 22 April 2016 at 17:37:44 UTC, Nordlöw wrote: Have anybody implement Ada-style modulo types https://en.wikibooks.org/wiki/Ada_Programming/Types/mod Here's my first try https://github.com/nordlow/phobos-next/blob/master/src/modulo.d Now at https://github.com/nordlow/phobos-next/blob/69e57fb2eed57d7450d746baa30d9f112d76f527/src/nxt/modulo.d
