On Wednesday, 17 August 2016 at 19:38:22 UTC, Engine Machine
wrote:
Well, the is does work and that probably is the best solution.
I don't mind the extra type at this point. Of course, a library
solution for this type of stuff would be nice. I'd rather not
have to even use a type but rather
On Saturday, 20 August 2016 at 22:18:57 UTC, Engine Machine wrote:
On Saturday, 20 August 2016 at 22:11:40 UTC, Engine Machine
wrote:
Is there a way to rebind the arguments of a template?
template foo(X)
{
// X is like A!(a,b,c)
Y = Rebind!(X,d,e,f);
// Y is like A!(d,e,f);
}
Good day.
In current implementation of dmd/ldc/gdc, does this trait
guarantee, that the order of elements returned in tuple, is same,
in several calls of it on same Type and member?
Also, is guaranteed that in future versions of dmd, the order of
elements won't change?
On Thursday, 23 February 2017 at 21:04:39 UTC, Nick Sabalausky
(Abscissa) wrote:
Suppose I want ddoc output to include this line:
--
Note: Blah blabbety blah
--
But the colon causes "Note" to be considered a section header.
Is there a way to escape the ":" so that it's
On Thursday, 29 December 2016 at 21:29:47 UTC, Stefan Koch wrote:
ldc accepts invalid code there.
But it might be that dmd 2.071.2 did that as well.
If so It will be fixed as soon as ldc updates the front-end
version.
Nope, tried with dmd v2.071.2 and it gives same error as v2.072.1.
I think
Hi all.
How it is possible to show readme.md from github repository in
code.dlang.org for a particular project?
Thanks.
Given code below:
import std.stdio;
struct Annotation {
public int delegate(int) dg;
}
void main() {
import std.traits;
__traits(getAttributes, Cls)[0].dg(20).writeln;
}
@Annotation(delegate int(int d) {
return d;
})
class Cls {
void method() {
}
}
On Thursday, 29 December 2016 at 21:07:00 UTC, Stefan Koch wrote:
It's a delegate and not function.
Therefore it will get a frame-ptr regardless, without checking
if it is needed or not, or if there is a frame to point to.
Since there is no frame to point to you get the error.
At least this is
Hi all,
Having a trivial example such as:
```D
class Foo {
/**
* A documentation info
**/
void fancy();
}
class Moo {
override void fancy();
}
```
Is there a way to tell ddoc to use Foo.fancy documentation block
for overriding Moo.fancy method?
Thx.
Hi,
Have someone tried to test a function against a signature using
is expression?
Suppose:
struct F {
static void foo(T)(T i, int o) {}
}
enum bool check(T) = is(F.foo!T == void function(Z, int), Z);
enum correct = check!int;
Upon running it will return false,
On Sunday, 17 December 2017 at 16:19:00 UTC, ag0aep6g wrote:
On Sunday, 17 December 2017 at 14:44:15 UTC, Alexandru Ermicioi
wrote:
Suppose:
struct F {
static void foo(T)(T i, int o) {}
}
enum bool check(T) = is(F.foo!T == void function(Z, int), Z);
enum correct = check!int;
Hi Dlang community!
I've been playing with dip1000 and scope storage class and
stumbled upon a strange error that I can't to understand yet.
Here is minimized version of code that generates the error:
The link: https://run.dlang.io/is/rg2Odu
--
import std.stdio;
Hi Dlang community!
I've stumbled on an interesting issue with allocators. It seems
that we can't get disposed of arrays with const or immutable
data. Consider example below:
Link: https://run.dlang.io/is/frnQI8
import std.stdio;
import std.range;
import
Perhaps I missed somewhere, but it seems that you can pass only
classes or interfaces to alias argument of a template. Trying to
pass another type (such as int, int[]) yields an error.
Example of issue:
void test(alias T)(int o) {
import std.stdio;
Hi everyone,
I've stumbled on another possible bug:
-
import std.stdio;
import std.conv;
void main() {
"[ \"test\" ]".to!(dstring[]).writeln;
}
-
It gives following error:
-
/dlang/dmd/linux/bin64/../../src/phobos/std/conv.d(222): Error:
On Sunday, 3 November 2019 at 17:02:30 UTC, Vinod K Chandran
wrote:
On Sunday, 3 November 2019 at 16:55:36 UTC, Vinod K Chandran
wrote:
Hi all,
I can do this in C++.
#include
using namespace std ;
#define end };
#define log(x) cout << x << endl
#define wait std::cin.get()
int main() {
On Sunday, 3 November 2019 at 16:55:36 UTC, Vinod K Chandran
wrote:
Hi all,
I can do this in C++.
#include
using namespace std ;
#define end };
#define log(x) cout << x << endl
#define wait std::cin.get()
int main() {
log("Trying to avoid the visual clutter aused by closing
curly
On Friday, 15 November 2019 at 03:29:16 UTC, Heromyth wrote:
On Thursday, 14 November 2019 at 19:50:22 UTC, NonNull wrote:
Greetings, Java seems to be almost a subset of D in various
ways.
No, it's not exactly right. Java is more powerful than D as for
a language. Many things that Java can do
On Thursday, 21 November 2019 at 20:48:03 UTC, Adam D. Ruppe
wrote:
On Thursday, 21 November 2019 at 20:45:16 UTC, Steven
Schveighoffer wrote:
To clarify, I need the compile time string that will match
typeid(instance).name, so I can match the derived type.
You have to make sure that the
On Friday, 28 February 2020 at 06:12:37 UTC, Виталий Фадеев wrote:
How to implement ?
I would go for a template mixin that implements send operation in
each subclass. Sine template mixin's content is declared in scope
of declaration not template's module, the code inside it is aware
of
On Friday, 27 December 2019 at 17:26:58 UTC, Robert M. Münch
wrote:
...
There are set of range interfaces that can be used to mask range
type. Check for
https://dlang.org/library/std/range/interfaces/input_range.html
for starting point, and for
On Friday, 27 December 2019 at 07:06:52 UTC, mipri wrote:
On Friday, 27 December 2019 at 06:08:16 UTC, Marcone wrote:
import std;
import core.thread;
auto threading(lazy void fun){ return
task!fun().executeInNewThread(); }
void main(){
threading(writeln("Hello World!"));
}
I want
Hi everyone,
there is https://issues.dlang.org/show_bug.cgi?id=21180 bug,
anyone knows how to avoid it?
Test case:
-
import std;
class Silly {
bool opEquals(const Silly silly) const @safe {
return silly is this;
}
alias opEquals = Object.opEquals;
}
bool
On Friday, 28 August 2020 at 08:16:01 UTC, Alexandru Ermicioi
wrote:
Hi everyone,
Would be glad at least to pointers, where in dmd is logic for
operator overloading happens, as well as for overloading rules,
so I could fix it myself, if no-one is able to pick up it.
On Friday, 28 August 2020 at 10:28:07 UTC, Simen Kjærås wrote:
What you'll need to do is mark every function that does compare
two class objects with == as @trusted or @system.
No that is not a solution at all, in template code that requires
safety. You basically will have to sacrifice
On Friday, 28 August 2020 at 12:29:20 UTC, Simen Kjærås wrote:
Seems that these methods should be rooted out from Object, and
placed in respective interfaces like:
-
interface Equatable(T) {
bool opEquals(T value);
}
-
Then it would be a lot more simple. People who want
On Friday, 28 August 2020 at 10:42:09 UTC, Alexandru Ermicioi
wrote:
...
Also, why it is limited to just objects? It seems that this
function enforces symmetry between two objects. What about rest
of the possible types, such as structs, unions?
On Wednesday, 2 June 2021 at 15:32:38 UTC, Sean wrote:
...
You can implement deep copy using template recursion:
import std;
T[] rdup(T : U[], U)(T[] duped) {
return duped.map!(arr => arr.rdup).array;
}
T[] rdup(T)(T[] duped) {
return duped.dup;
}
On Friday, 2 July 2021 at 00:26:52 UTC, someone wrote:
... just wondering:
...
Imho, if you want all of the app to be safe, and you cannot avoid
unsafe code, then there are two choices:
1. Mark the method doing unsafe stuff as @trusted, or pieces of
code which are unsafe with trusted lambda
On Friday, 2 July 2021 at 04:21:24 UTC, Kirill wrote:
...
1. use static foreach for tuple loop.
2. start column and end column should be known at compile time.
Either make them immutable, or as enum constant, or pass them as
an template argument.
Tuple is basically a wrapper over built in
On Friday, 2 July 2021 at 22:08:31 UTC, tsbockman wrote:
(Responding out of order:)
On Friday, 2 July 2021 at 00:26:52 UTC, someone wrote:
But when you start attempting to declare @safe chunks of code
that actually DO things ... well, it seems end-of-the-story.
If you find yourself unable to
On Wednesday, 30 June 2021 at 20:12:29 UTC, H. S. Teoh wrote:
On Wed, Jun 30, 2021 at 07:40:40PM +, someone via
Digitalmars-d-learn wrote: [...]
@property int data() { return m_data; } // read property
[...]
string something() @property { return this.whatever; }
[...]
Now I am not
On Wednesday, 30 June 2021 at 17:47:05 UTC, someone wrote:
...
That is because const/immutable/shared are being applied on the
object hence 'this' variable inside function body if function is
a member of a struct or class. It doesn't make sense to have a
const modifier on a simple function.
On Saturday, 3 July 2021 at 20:09:56 UTC, tsbockman wrote:
On Saturday, 3 July 2021 at 16:06:33 UTC, Alexandru Ermicioi
wrote:
3. An edge case. Ex: You need to mutate some data and then
assume it is immutable in a constructor.
Can you give a valid example where that is necessary? The main
On Sunday, 15 August 2021 at 16:23:25 UTC, Ali Çehreli wrote:
That output contains two automatically chained exceptions:
Failed: Main failed
This failed too: The destructor failed
Ali
Hmm, wasn't aware of such use case (results of too much java :)).
Considering this case I'd say it is
On Monday, 16 August 2021 at 06:12:14 UTC, Tejas wrote:
...
Fyi, check out std.exeprimental.allocator package. You can use
allocators from there to do allocation of exceptions, on the heap
or any other region.
On Tuesday, 17 August 2021 at 18:11:56 UTC, james.p.leblanc wrote:
Is there a more elegant way, to do this?
Regards,
James
PS Any violations should be caught at compile time.
That is template specialization:
```
auto moo(T : YourSpecialClassOrDType)(T myMoo) {•••}
```
You can also declare
On Tuesday, 17 August 2021 at 19:53:52 UTC, james.p.leblanc wrote:
Wow! That is absolutely beautiful ... I had never seen (or even
imagined) a recursive template! This expands my mind in a good
way ... and is going into my toolbox immediately.
Best Regards,
James
Just don't over rely on
On Tuesday, 24 August 2021 at 09:15:23 UTC, bauss wrote:
A range should be a struct always and thus its state is copied
when the foreach loop is created.
Actually the range contracts don't mention that it needs to be a
by value type. It can also be a reference type, i.e. a class.
Which
On Tuesday, 24 August 2021 at 08:36:18 UTC, frame wrote:
How do you handle that issue? Are your ranges designed to have
this bug or do you implement opApply() always?
This is expected behavior imho. I think what you need is a
forward range, not input range. By the contract of input range,
it
On Wednesday, 25 August 2021 at 11:04:35 UTC, Steven
Schveighoffer wrote:
It never has called `save`. It makes a copy, which is almost
always the equivalent `save` implementation.
-Steve
Really?
Then what is the use for .save method then?
The only reason I can find is that you can't declare
On Wednesday, 25 August 2021 at 06:51:36 UTC, bauss wrote:
Of course it doesn't disallow classes but it's generally
advised that you use structs and that's what you want in 99% of
the cases. It's usually a red flag when a range starts being a
reference type.
Well, sometimes you can't avoid
On Wednesday, 25 August 2021 at 08:15:18 UTC, frame wrote:
I know, but foreach() doesn't call save().
Hmm, this is a regression probably, or I missed the time frame
when foreach moved to use of copy constructor for forward ranges.
Do we have a well defined description of what input, forward
On Monday, 16 August 2021 at 06:36:02 UTC, james.p.leblanc wrote:
To be honest, I am not exactly sure what is happening here. I
am unfamiliar with the "(T : T[])" syntax ... need to read
That is template argument secialization. You're saying that T can
be accept only types that are arrays of
On Saturday, 14 August 2021 at 13:24:22 UTC, Tejas wrote:
...
I don't think there are any gotchas here. The problem with this
technique, is when your exceptions aren't just simple labels but
also carry some additional data, say for example specific error
type, and subject that, caused this.
On Saturday, 21 August 2021 at 04:34:46 UTC, Ali Çehreli wrote:
...
Consider __traits(identifier, member) instead. This one should
return member name as string, removing the need of memberName
function.
Also you could have an annotation @Equality.Include for example,
and make mixin scan
On Saturday, 21 August 2021 at 05:34:59 UTC, Alexandru Ermicioi
wrote:
...
Also there is no need for mixing string code here. You can get
the field using __traits(getMember, this, member).
On Sunday, 15 August 2021 at 00:15:32 UTC, Ali Çehreli wrote:
Even though this feature is probably never used, in D, multiple
exception objects are chained. For example, you can throw e.g.
in a destructor when there is an active exception in flight and
that second object gets attached to the
On Wednesday, 4 August 2021 at 15:08:24 UTC, someone wrote:
However, __traits(hasMember, ...) checks for the existence of
anything labeled lstrCurrencyID within the class (eg: unrelated
variables with same name; not gonna happen, but, I like to code
it the right way); so, question is: is
On Wednesday, 4 August 2021 at 22:28:53 UTC, someone wrote:
Is that what you mean ?
Not really. I was assuming you were talking about @property
methods, and if so you could declare such cases:
```
interface HasMutableLstrSymbolId {
@property lstrSymbolId();
@property lstrSymbolId(string
On Friday, 18 March 2022 at 21:04:03 UTC, H. S. Teoh wrote:
On Fri, Mar 18, 2022 at 11:16:51AM -0700, Ali Çehreli via
Digitalmars-d-learn wrote:
tldr; I am talking on a soap box with a big question mind
hovering over on my head: Why can't I accept pulling in
dependencies automatically?
Hi team,
I'd like to ask a lazy question:
How easy is to use D compiler frontend without backend?
How complicated would be to write a transpiler, and from which
files should you start modifications?
I'm wondering if something like
https://typescripttolua.github.io/ could be done, but with d
On Monday, 26 December 2022 at 23:08:59 UTC, Richard (Rikki)
Andrew Cattermole wrote:
...
That on the other hand... Yeah, things aren't great on that
front. The thing you want to implement is what we call glue
code and isn't really setup right now for this (nobody has
tried like this,
On Monday, 21 November 2022 at 11:34:50 UTC, thebluepandabear
wrote:
Best regards,
Alexandru.
Thanks but I haven't reached that yet.
Well, I wish you'll reach as soon as possible :)
On Monday, 21 November 2022 at 11:20:31 UTC, Alexandru Ermicioi
wrote:
On Thursday, 17 November 2022 at 04:39:35 UTC, thebluepandabear
wrote:
[...]
Dunno if someone mentioned, but you can minimize use of
boilerplate by hiding it into mixin templates. Say you have:
```D
mixin template
On Thursday, 17 November 2022 at 04:39:35 UTC, thebluepandabear
wrote:
I am creating a TUI library and I have a class with the
following constant fields:
```
class Label : Renderable {
const string text;
const TextAlignment textAlignment;
const Color color;
this(Dimensions
On Sunday, 17 December 2023 at 04:13:20 UTC, Ki Rill wrote:
I am trying to overload `opOpAssign` for my class. The code
compiles, but it does not seem to be working.
```d
// binary operations have already been implemented for Value
// i need +=, -=, *=, /=
auto opOpAssign(string op)(Value rhs)
On Sunday, 31 December 2023 at 04:40:02 UTC, Axel Casillas wrote:
Hi there,
I'm trying to implement web api's into a terminal program. With
some help at the IRC have gotten pretty far but just hit a
roadblock trying to manipulate the web api to accept input from
the user.
Example:
auto
On Sunday, 31 December 2023 at 09:47:27 UTC, Siarhei Siamashka
wrote:
Also take a look at the `c` array. The handling of arithmetic
overflows is a safety problem of the D language design. Certain
types of input may cause overflows, which result in producing
bogus data as a result of running
On Friday, 24 November 2023 at 17:39:10 UTC, Antonio wrote:
...
Dunno if this might help, but I noticed that `==` sometimes calls
`opEquals(const Object) const` instead of overload defined on
class/interface, you might try and override it as well, and
delegate to your overload that deals
On Monday, 27 November 2023 at 09:53:48 UTC, Antonio wrote:
...but why?
All classes (and interfaces I think), at root of inheritance have
`Object` class, this class defines couple of generic methods, you
can find this class in object.d btw. One of those methods is
`bool opEquals(const
On Monday, 29 January 2024 at 14:59:23 UTC, Richard (Rikki)
Andrew Cattermole wrote:
If you are using a NewsGroup reader like ThunderBird it should
be possible to branch off and post in a different one.
What about web interface?
Although nobody does that, normally people rename the subject
Hi everyone,
So just wondering is it possible to branch off a thread into new
one (viewable as separate item in forum group)?
Also, is it possible to branch into a different gruop all
toghether?
I.e. from "blabla" thread in announce to "some other thing"
thread in learn for example?
On Tuesday, 23 January 2024 at 16:11:25 UTC, ryuukk_ wrote:
Hello,
I have the following:
```D
struct Stuff {
int opApply(scope int delegate(Stuff*) dg)
{
return 0;
}
};
void main()
{
Stuff* stuff;
foreach(it; *stuff)
{}
}
```
It works fine.. but when the
On Tuesday, 14 November 2023 at 08:50:34 UTC, dhs wrote:
In other words: why doesn't ss2=s2 fail here?
Thanks,
dhs
Seems like it isn't called at all, your copy constructor with
inout. Could be a bug.
My assumption is that default copy constructors are generated
alongside inout one, and
On Monday, 13 November 2023 at 14:15:31 UTC, seany wrote:
Is there a better way? I want a method that works for every
variable type including classes and objects.
Thank you
Perhaps, use length property of string. It should tell you length
of a string and then you multiply it by size of
On Sunday, 24 March 2024 at 07:41:41 UTC, Dom DiSc wrote:
I'm creating a library that is completely pure, but it doesn't
compile with pure: at the top because of one impure unittest
(which uses random to test some things only probabilistic)!
So do I really need to declare every function pure
On Monday, 8 April 2024 at 07:53:01 UTC, Dom DiSc wrote:
On Sunday, 24 March 2024 at 07:41:41 UTC, Dom DiSc wrote:
Try `debug unittest {...}`?
Cool. This seems to work. That's a nice workaroud for tests.
Yay!
Nice, fyi, you can use it with statements inside function bodies
as well.
On Monday, 22 April 2024 at 11:36:43 UTC, Chloé wrote:
The first implementation has the advantage is being simpler and
empty being const, but has the downside that next is called
even if the range ends up not being used. Is either approach
used consistently across the D ecosystem?
You can
Hello,
Given:
class SomeClass {
public {
void someSimpleMethod() {}
template setOfTemplatedMethods(Type) {
void templatedMethodOne() {}
void templatedMethodTwo() {}
}
}
}
Is there a way to detect at compile time if a member of
Suppose we have, two modules:
module testOne;
import std.traits;
template getMember(alias T, string member) {
alias getMember = Identity!(__traits(getMember, T, member));
}
module app;
import testOne;
import std.traits;
class TestOne {
private {
int property;
}
On Saturday, 26 September 2015 at 10:10:39 UTC, Alexandru
Ermicioi wrote:
Suppose we have, two modules:
module testOne;
[...]
So, is this behavior correct?
If yes, then why?
On Tuesday, 22 September 2015 at 15:37:32 UTC, Meta wrote:
On Sunday, 13 September 2015 at 08:26:55 UTC, Alexandru
Ermicioi wrote:
Hello,
Given:
class SomeClass {
public {
void someSimpleMethod() {}
template setOfTemplatedMethods(Type) {
void
On Sunday, 13 September 2015 at 09:29:13 UTC, Enamex wrote:
On Sunday, 13 September 2015 at 08:26:55 UTC, Alexandru
Ermicioi wrote:
Hello,
Given:
class SomeClass {
public {
void someSimpleMethod() {}
template setOfTemplatedMethods(Type) {
void
I have to pass an array to a function that accepts an input
range. Therefore I need to transform somehow array into an input
range.
Is there a range that wraps an array in standard library?
Good day,
Is it possible somehow to convert implicitly a string literal
into an ubyte array?
For example:
void do(immutable(ubyte)[] asciiString) {
// Do something with ascii string.
}
And from another section of code, calling it like:
do("Some ascii string");
---
If no, is there
76 matches
Mail list logo
