On Wednesday, 13 January 2021 at 02:15:49 UTC, Tim wrote:
Basically, the program calls a function which modifies a
document in the database. If it is called form it's own class'
constructor, it works fine. If it is called by a thread, it
never returns.
...
class Caller : Thread{
void deleg
Currently I'm with this:
auto ref ifNotNull(T, T2)(T lhs, lazy T2 rhs)
{
if(lhs) {
rhs();
}
return lhs;
}
far from good. I wish there was a way to create a new operator so
I would make .? similar to C#'s but would evaluate the
left-handed side only if it's null and do noth
On Tuesday, 12 January 2021 at 01:49:11 UTC, tsbockman wrote:
The compiler and the physical CPU are both allowed to change
the order in which instructions are executed to something
different from what your code specifies, as long as the
visible, "official" results and effects of the chosen orde
On Sun, Jan 10, 2021 at 06:58:13PM +, aberba via Digitalmars-d-learn wrote:
> I'm looking to explore running a D application on Android based on
> Adams previous foundation work. However, I'm not familiar with the
> Android + D integration so I need some help.
>
> Has any of you successfully d
On Tuesday, 12 January 2021 at 21:32:14 UTC, Ali Çehreli wrote:
On 1/12/21 12:58 PM, cc wrote:
> void send(T query, void delegate(T.RESPONSE) callback) {
That wants a delegate that takes a T.RESPONSE (PingResponse in
this case). However, the following lambda is in fact a template:
>
On Tuesday, 12 January 2021 at 21:38:59 UTC, sighoya wrote:
What about this?
No magic, but I don't know the performance impact.
```
import std.meta;
import std.conv;
template same(Types...)
{
static if (Types.length >= 2)
{
static if (is(Types[0] == Types[$ - 1]))
{
On Tuesday, 12 January 2021 at 14:00:11 UTC, Steven Schveighoffer
wrote:
On 1/11/21 8:49 PM, tsbockman wrote:
However, this re-ordering IS permitted to freely alter the
behavior of your code from the perspective of OTHER threads. A
likely cause of your bug is that the write to db by the
constr
What about this?
No magic, but I don't know the performance impact.
```
import std.meta;
import std.conv;
template same(Types...)
{
static if (Types.length >= 2)
{
static if (is(Types[0] == Types[$ - 1]))
{
const same = same!(Types[1 .. $]);
}
I was looking for a way to avoid null checks everywhere. I was
checking the Null object pattern, or use something like enforce
pattern, or even if I could make a new operator and implement
something like C#'s .? operator, that Java was going to have one
but they refused[1] (doesn't behave exact
On 1/12/21 12:58 PM, cc wrote:
> void send(T query, void delegate(T.RESPONSE) callback) {
That wants a delegate that takes a T.RESPONSE (PingResponse in this
case). However, the following lambda is in fact a template:
> send(PingQuery("helo"), (resp) {
You specify the type there an
On Tuesday, 12 January 2021 at 18:12:14 UTC, Q. Schroll wrote:
Did you consider `in`? It will do that in some time and do it
now with -preview=in.
If you're using `const`, in almost all cases, `in` will work,
too, and be better (and shorter).
Has the redesignation of "in" like in the preview
Given the following program:
struct PingQuery {
string msg;
}
struct PingResponse {
string msg;
}
template send(T) {
void send(T query, void delegate(PingResponse) callback) {
writefln("Sending: %s", query);
if (callback) {
On 1/12/21 2:49 PM, ryuukk_ wrote:
On Tuesday, 12 January 2021 at 18:44:53 UTC, Jonathan Levi wrote:
On Tuesday, 12 January 2021 at 17:46:14 UTC, Q. Schroll wrote:
It's obvious why arrays work, it's the primary use case. I have no
idea why classes are allowed. That classes are allowed, but stru
On Tuesday, 12 January 2021 at 20:19:20 UTC, ag0aep6g wrote:
On 12.01.21 21:09, cc wrote:
import core.sys.windows.windows;
import mymodule; // contains a struct named MSG
Error: `core.sys.windows.winuser.MSG` ... conflicts with
`mymodule.MSG`
vs
import core.sys.windows.windows : winMSG = MSG
On 1/12/21 12:46 PM, Q. Schroll wrote:
On Tuesday, 12 January 2021 at 17:26:15 UTC, Jonathan Levi wrote:
Why is this not working?
```
struct S {
int x;
string y;
}
void fun(S s ...) {
This is intended for arrays and classes, not structs. Using ... for
something other than arrays and
On Tuesday, 12 January 2021 at 18:44:53 UTC, Jonathan Levi wrote:
On Tuesday, 12 January 2021 at 17:46:14 UTC, Q. Schroll wrote:
It's obvious why arrays work, it's the primary use case. I
have no idea why classes are allowed. That classes are
allowed, but structs are not, makes no sense to me.
On 12.01.21 21:09, cc wrote:
import core.sys.windows.windows;
import mymodule; // contains a struct named MSG
Error: `core.sys.windows.winuser.MSG` ... conflicts with `mymodule.MSG`
vs
import core.sys.windows.windows : winMSG = MSG; // this leaves out other
symbols
Error: undefined identifier
Is it possible to import all symbols of a module, while renaming
just one of them? It seems like doing an import with renaming
automatically makes it selective.
In the example below, I'd prefer not to have to use the fully
qualified name for mymodule.MSG every time e.g.:
import core.sys.windo
On Tuesday, 12 January 2021 at 18:44:53 UTC, Jonathan Levi wrote:
On Tuesday, 12 January 2021 at 17:46:14 UTC, Q. Schroll wrote:
It's obvious why arrays work, it's the primary use case. I
have no idea why classes are allowed. That classes are
allowed, but structs are not, makes no sense to me.
On 1/12/21 10:44 AM, Jonathan Levi wrote:
> why does `fun` still compile?
I'm not familiar with that particular syntax, I don't know why it
compiles, and I don't know why structs are different. :) However, it
looks very much like the following *slice* syntax:
void fun(S[] s...) {
writeln
On Tuesday, 12 January 2021 at 17:46:14 UTC, Q. Schroll wrote:
It's obvious why arrays work, it's the primary use case. I have
no idea why classes are allowed. That classes are allowed, but
structs are not, makes no sense to me.
I like the variadic feature for classes, but I wish it worked for
On Monday, 11 January 2021 at 16:53:50 UTC, IGotD- wrote:
I usually use "const string text" because D has no implicit
declaration of variables. So using "ref" will not create a
variable. This is contrary to C++ where passing as "const
std::string &text" has a performance benefit and also C++
c
On Monday, 11 January 2021 at 14:12:57 UTC, zack wrote:
A beginner question: How to pass strings properly to functions
in D?
Is there any allocation going on if just use a function as
"myPrint"? In C++ I have often seen calls where one just passes
a reference/const reference to a string to avoi
On Tuesday, 12 January 2021 at 17:26:15 UTC, Jonathan Levi wrote:
Why is this not working?
```
struct S {
int x;
string y;
}
void fun(S s ...) {
This is intended for arrays and classes, not structs. Using ...
for something other than arrays and c
fun(S(5,"hi"));
That one sho
Why is this not working?
```
struct S {
int x;
string y;
}
void fun(S s ...) {
writeln(s);
}
void main() {
fun(S(5,"hi"));
fun(5,"hi");
}
```
Why does `fun` compile if calling it does not?
On Tuesday, 12 January 2021 at 13:51:16 UTC, Imperatorn wrote:
On Tuesday, 12 January 2021 at 12:40:28 UTC, Mike Parker wrote:
Are you asking if anyone patched the binaries and made them
available as a third-party download?
Yes, or if there are any plans for those changes to go upstream.
On 1/11/21 8:49 PM, tsbockman wrote:
On Monday, 11 January 2021 at 00:43:00 UTC, Tim wrote:
When MessageService calls the delegate for start, db is null. If I
call start() in the Foo constructor it works just fine. Am I missing
something here? Do delegates get called outside of their class
con
On 1/11/21 12:26 PM, Arafel wrote:
Thanks for the detailed explanation! I think this mixing of types and
storage classes makes a very unfortunate combination:
```
import std;
int i = 0;
shared int j = 0;
struct S {
int i = 0;
shared int j = 0;
}
S s;
void main() {
i = 1;
On Tuesday, 12 January 2021 at 12:40:28 UTC, Mike Parker wrote:
On Tuesday, 12 January 2021 at 10:25:42 UTC, Imperatorn wrote:
https://forum.dlang.org/post/qsgtohsykwldipgng...@forum.dlang.org
On Saturday, 3 October 2020 at 23:14:57 UTC, Drone1h wrote:
On Monday, 18 May 2020 at 05:36:01 UTC, M
On 1/11/21 6:52 PM, Paul Backus wrote:
On Monday, 11 January 2021 at 16:10:49 UTC, Steven Schveighoffer wrote:
There are some... odd rules.
struct S
{
[...]
immutable int e = 5; // stored in data segment, not per instance!
Are you sure?
struct S
{
immutable int n = 123;
this(i
On Tuesday, 12 January 2021 at 10:25:42 UTC, Imperatorn wrote:
https://forum.dlang.org/post/qsgtohsykwldipgng...@forum.dlang.org
On Saturday, 3 October 2020 at 23:14:57 UTC, Drone1h wrote:
On Monday, 18 May 2020 at 05:36:01 UTC, Mike Parker wrote:
[...]
This is not exactly a reply to the ori
Ok, so I now have this, but I think maybe the switch could be
turned into a static array by an reinterpret cast of
"&expand[0]"? I would assume the layout would typically be
"expand_field_0, expand_field_1 etc...
template Tuple(Types...){
template same(){
static foreach (i, dummy;
NOTE : the entire code we are talking about is in the tiny url in
my previous post.
On Thursday, 7 January 2021 at 01:55:07 UTC, SealabJaster wrote:
On Wednesday, 6 January 2021 at 17:05:02 UTC, ludo wrote:
...
Using a static class like this seems to mostly be a design
decision.
So in ot
https://forum.dlang.org/post/qsgtohsykwldipgng...@forum.dlang.org
On Saturday, 3 October 2020 at 23:14:57 UTC, Drone1h wrote:
On Monday, 18 May 2020 at 05:36:01 UTC, Mike Parker wrote:
[...]
This is not exactly a reply to the original thread, but maybe
it helps someone who has searched for "
On Tuesday, 12 January 2021 at 09:49:46 UTC, Mike Parker wrote:
On Tuesday, 12 January 2021 at 09:31:08 UTC, ichneumwn wrote:
Follow on to my own question: on Linux, with gcc, I have
created the following file "starter.c" that I inject into my D
shared library:
int rt_init(void);
int r
On Tuesday, 12 January 2021 at 09:02:38 UTC, Imperatorn wrote:
On Tuesday, 12 January 2021 at 08:19:45 UTC, ichneumwn wrote:
Where could one file a suggestion for an update to the
documentation?
In the top right section of the page you can click the "Improve
this page"-link.
Thanks, I will
On Tuesday, 12 January 2021 at 09:31:08 UTC, ichneumwn wrote:
Follow on to my own question: on Linux, with gcc, I have
created the following file "starter.c" that I inject into my D
shared library:
int rt_init(void);
int rt_term(void);
// should really check for errors!
static void
On Tuesday, 12 January 2021 at 08:19:45 UTC, ichneumwn wrote:
Dear all,
I was trying to invoke some D code from Python and ran into
issues which I eventually traced back to a simple example on
the D website itself :
https://dlang.org/articles/dll-linux.html
Particularly the section "Dynamic
On Monday, 11 January 2021 at 17:26:00 UTC, Arafel wrote:
void f() {
assert(i == 0); // Expected
assert(j == 1); // Expected
assert(s.i == 0); // Expected
assert(s.j == 0); // Wait, what?
}
At first sight this looks unexpected. But I think if you have a
shared variable inside
On Tuesday, 12 January 2021 at 06:25:09 UTC, evilrat wrote:
On Tuesday, 12 January 2021 at 00:35:41 UTC, Marcone wrote:
Hi, Someone can Help me build exe dcd server and client on
WIndows? Step by step? Becouse the informations disponible is
very hard to undestand.
Are you serious?
It's on the
On Tuesday, 12 January 2021 at 08:19:45 UTC, ichneumwn wrote:
Where could one file a suggestion for an update to the
documentation?
In the top right section of the page you can click the "Improve
this page"-link.
Dear all,
I was trying to invoke some D code from Python and ran into
issues which I eventually traced back to a simple example on the
D website itself :
https://dlang.org/articles/dll-linux.html
Particularly the section "Dynamically Loading a D DLL From a C
Program"
In my case, and indee
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