On Monday, 2 September 2019 at 12:43:31 UTC, berni wrote:
I need to pass the delegate add_new_way somehow to opApply.
Here I managed this, by adding this delegate to the
remove-delegate and safe it away for further use. This works,
because if remove is never called, add_new_way is not used
On Sunday, 1 September 2019 at 20:42:28 UTC, Jabari Zakiya wrote:
It still won't compile, with this error.
Error: AliasSeq!(modpg, res_0, restwins, resinvrs) is not an
lvalue and cannot be modified
Here's a gist of the code.
Top functions in code with issues are genPgParameters and
On Friday, 30 August 2019 at 13:43:54 UTC, XavierAP wrote:
On Thursday, 29 August 2019 at 10:11:58 UTC, berni wrote:
Iterating of some structure and removing elements thereby is
always errorprone and should be avoided. But: In case of AA,
I've got the feeling, that it might be safe:
foreach
On Sunday, 25 August 2019 at 19:03:10 UTC, JN wrote:
I think normal lambdas are better than these string ones:
foo.byPair.array.sort!((a, b) => a[0] < b[0]).map!(a =>
a[1]).writeln;
You can also use names instead of numeric indices:
foo.byPair.array.sort!((a, b) => a.key < b.key).map!(a =>
On Thursday, 22 August 2019 at 18:50:59 UTC, lili wrote:
Hi:
I write a template function is below, that need to remove
const topmost if has.
How to do this?
https://dlang.org/phobos/std_traits.html#Unqual
On Friday, 16 August 2019 at 08:07:28 UTC, aliak wrote:
Hi, I'm trying to fix a use-case where you have a wrapper
template type (it's an optional) and the wrapping type has
@disable this(this). And having this scenario work:
struct S {
@disable this(this);
}
Optional!S fun() {...}
On Friday, 16 August 2019 at 08:07:28 UTC, aliak wrote:
Hi, I'm trying to fix a use-case where you have a wrapper
template type (it's an optional) and the wrapping type has
@disable this(this). And having this scenario work:
[...]
2) use isRef inside opAssign like this:
void opAssign(auto
On Monday, 12 August 2019 at 22:48:43 UTC, Bert wrote:
Making a field static is effectively a global variable to the
class.
I have a recursive class structure(think of a graph or tree)
and I need to keep a global state for it, but this state
actually needs to be different for each tree
On Thursday, 8 August 2019 at 15:51:45 UTC, Drobet wrote:
I'm having a weird issue, where after defining my classes
variables as private, they can still be modified and looked at
from the outside. That leads to this code compiling with no
issues.
[...]
My question is if this is intended
On Sunday, 4 August 2019 at 18:22:30 UTC, matheus wrote:
On Sunday, 4 August 2019 at 18:15:30 UTC, Max Haughton wrote:
What do you want to do? If you just want to count to 255 then
use a foreach
This was just an example, what I'd like in this code is either:
Get an error (exception) when
On Wednesday, 31 July 2019 at 18:38:02 UTC, Alexandre wrote:
Hi everyone,
I would like an honest opinion.
I have a beginner level (able to do very small programs) in a
few languages such as python, go, C, guile(scheme) and common
lisp. I want to pick a language and go deep with it and focus
On Friday, 26 July 2019 at 03:42:58 UTC, Andrey Zherikov wrote:
Is there a way to check whether some module, say "foo", is
available for import before doing "import foo"?
I want to create a function that imports module if it's
available or does something else otherwise. So I think the code
On Thursday, 25 July 2019 at 21:58:06 UTC, aliak wrote:
Haha. Ironic. Thanks, again :)
Though, if you use auto ref, and you check if it's mutable and
not copyable and then move, then that means you could
potentially be applying move to an object on behalf of the
clients
auto a =
On Thursday, 25 July 2019 at 20:38:59 UTC, aliak wrote:
On Thursday, 25 July 2019 at 19:35:36 UTC, aliak wrote:
Basically, can template W be made to handle an S that can't be
copied?
import std;
static struct S {
int i;
@disable this(this);
this(int i) { this.i = i; }
}
[...]
On Wednesday, 24 July 2019 at 12:54:51 UTC, aliak wrote:
Trying to get dip1000 flag in use. I have this error:
Error: returning Optional(null, false).this(value) escapes a
reference to parameter value, perhaps annotate with return
in this function:
public auto some(T)(auto ref T value) {
On Sunday, 21 July 2019 at 18:03:33 UTC, Johannes Loher wrote:
I'd like to log stacktraces of caught exceptions in an @safe
manner. However, Throwable.TraceInfo.toString is not @safe (or
@trusted), so this is not possible. Why is it not @safe? Can it
be @trusted?
Thanks for your help!
On Wednesday, 17 July 2019 at 17:03:16 UTC, Mike Brockus wrote:
If you never seen Meson before then pick up a camera and take a
picture:
樂 https://mesonbuild.com/
Quick question.
I started integrating ci/cd best practices to my Meson projects
and I was wondering how would I know if AppVayer
On Monday, 15 July 2019 at 13:40:29 UTC, Ben Ogles wrote:
Now I want to extend it so that a caller can specify the values
of only some of the parameters. I tried using a static foreach
instead of the staticMap function. But I can't modify AliasSeq
values.
alias args = AliasSeq!(0, 0);
static
On Thursday, 11 July 2019 at 19:44:51 UTC, Stefanos Baziotis
wrote:
On Thursday, 11 July 2019 at 19:37:38 UTC, Nathan S. wrote:
If you know that what you're doing cannot result in memory
corruption but the compiler cannot automatically infer @safe,
it is appropriate to use @trusted. (For
On Thursday, 11 July 2019 at 16:31:58 UTC, Stefanos Baziotis
wrote:
I searched the forum but did not find something.
I want to do this:
int foo(T)(ref T s1, ref T s2)
{
const byte[] s1b = (cast(const(byte)*))[0 .. T.sizeof];
const byte[] s2b = (cast(const(byte)*))[0 .. T.sizeof];
}
On Tuesday, 2 July 2019 at 08:50:36 UTC, guiguidu60 wrote:
I have a hello world program build with DUB on Linux, but the
program as marked as "application/x-sharedlib" and not
"application/x-executable" (in properties of the file): so, I
can't able to execute the program from the file explorer
On Saturday, 29 June 2019 at 09:50:12 UTC, BoQsc wrote:
The correct syntax is:
environment.opIndexAssign("Some Random Value Here",
"variableName");
And not this one:
environment.opIndexAssign("variableName", "Some Random Value
Here");
Note that opIndexAssign is an operator overload [1], so
On Thursday, 27 June 2019 at 17:05:05 UTC, Vaidas wrote:
Is it possible to set the default values for the Main
function's arguments?
It seems that I'm getting Range error.
import std.stdio : writeln;
void main(string[] args = ["asdsfasdf", "asdklfajsdk",
"asdfasdfasd"]){
writeln("",
On Thursday, 27 June 2019 at 17:20:37 UTC, Paul Backus wrote:
void main(string[] args)
{
string[] defaultArgs = ["my", "default", "arguments"];
if (args.length == 0) {
args = defaultArgs;
}
// Process args...
}
Correction: you should check for `args.length == 1`, since
On Friday, 21 June 2019 at 22:35:55 UTC, Mike Brockus wrote:
On Friday, 21 June 2019 at 17:52:43 UTC, Mike Wey wrote:
On 21-06-2019 06:08, Mike Brockus wrote:
[...]
If you are using the D unittests in your source you can
recompile the same source with `d_unittest: true`, the
The following code fails to compile with -dip1000:
struct Inner(T) {
T value;
this(ref T value) { this.value = value; }
}
struct Outer(T) {
Inner!T inner;
void opAssign(ref T rhs) { inner = Inner!T(rhs); }
}
@safe void main() {
int x;
int* p =
Outer!(int*) o;
o
On Wednesday, 12 June 2019 at 06:57:55 UTC, Robert M. Münch wrote:
If you use an associative array or a set, it's O(n) time and
O(n) space.
I don't see how this is the case. The AA itself has some
overhead too. So, the checking loop is O(n) but the AA lookups
not.
Hash table insertion and
On Tuesday, 11 June 2019 at 17:12:17 UTC, Robert M. Münch wrote:
Is there a simple and elegant way to do this? Or is just using
a foreach(...) with canFind() the best way?
It's a space/time tradeoff. foreach with canFind is O(n^2) time
and O(1) space. If you use an associative array or a set,
On Sunday, 2 June 2019 at 16:39:57 UTC, Rnd wrote:
Is it not possible in the language to have template map
function also to called as map(x=>... ?
This will reduce complexity which will attract more people to
this language.
Easy languages have great mass appeal as has been shown with
On Sunday, 2 June 2019 at 15:48:54 UTC, Rnd wrote:
I have recently started using Dlang, hence this basic question.
Thanks for your insight.
map and filter are templates in D, and !(...) is D's syntax for
passing arguments to templates:
map!(x => x*x)([1, 2, 3, 4, 5])
^ ^
|
On Sunday, 2 June 2019 at 14:44:47 UTC, H. S. Teoh wrote:
On Sun, Jun 02, 2019 at 02:32:16PM +, Paul Backus via
Digitalmars-d-learn wrote: [...]
If std.v2 ever materializes, we'll have an opportunity to fix
papercuts like this. Until then, my preferred workaround is to
use a renaming
On Sunday, 2 June 2019 at 07:55:27 UTC, Amex wrote:
A.B
If A is null, crash.
A?.B : writeln("HAHA");
No crash, ignored, equivalent to
if (A is null) writeln("HAHA"); else A.B;
The "optional" package on dub [1] has a .dispatch method that
does this:
auto d = some(A());
//
On Sunday, 2 June 2019 at 06:59:02 UTC, Jonathan M Davis wrote:
Almost certainly, hasElaborateCopyConstructor should be updated
to test for both postblit constructors and copy constructors,
since its purpose is to test for whether the type has a
user-defined copying function [...] Whether
On Saturday, 1 June 2019 at 23:29:08 UTC, SrMordred wrote:
On Saturday, 1 June 2019 at 21:39:33 UTC, SImen Kjærås wrote:
On Saturday, 1 June 2019 at 21:05:32 UTC, SrMordred wrote:
hasElaborateCopyConstructor checks if the type defines a
postblit[0].
Yes, I know this.
But since dmd 2.086
On Saturday, 1 June 2019 at 02:27:36 UTC, SrMordred wrote:
Its possible to call copyctor manually without calling dtor?
ex, what i did before:
struct T{ ~this(){ writeln("DTOR"); } this(this){
writeln("POSTBLIT"); } }
T a;
T b;
memcpy(,,T.sizeof);
a.__postblit;
/*
output:
POSTBLIT
DTOR
On Sunday, 19 May 2019 at 22:20:48 UTC, Josh wrote:
Thank you, that helps big time.
This is just more curiosity, but do you happen to know why I
have to use DList.linearRemove() instead of DList.remove()?
import std.stdio;
import std.container.dlist;
import std.algorithm;
import std.range;
On Sunday, 19 May 2019 at 20:55:28 UTC, Josh wrote:
Just started looking at D this weekend, coming from a
C++/Java/Go/Rust background and it's really not going well.
Trying to write something to play with the language and need a
linked list, looking in std.container you have a single or
On Wednesday, 8 May 2019 at 18:01:53 UTC, Ben Jones wrote:
I'm trying to write a template function like the below... is it
possible without using string mixins?
void fun( alias(?) field, alias p1, alias p2)()
{
if(p1.field)
use(p2.field);
}
called with something like
static
On Monday, 29 April 2019 at 14:36:49 UTC, number wrote:
And how to use the d libs instead? is this the way to go?
```
Random rnd = Random(Clock.currTime().second);
uniform01(rnd); //(or whatever)
```
https://dlang.org/phobos/std_random.html#unpredictableSeed
On Sunday, 28 April 2019 at 23:10:24 UTC, Ferhat Kurtulmuş wrote:
You are right. I am rewriting the things using mallocs, and
will use core.stdc.stdlib.free on d side. I am not sure if I
can use core.stdc.stdlib.free to destroy arrays allocated with
new op.
core.stdc.stdlib.free is (as the
On Saturday, 27 April 2019 at 22:25:58 UTC, Ferhat Kurtulmuş
wrote:
Hi,
I am wrapping some C++ code for my personal project (opencvd),
and I am creating so many array pointers at cpp side and
containing them in structs. I want to learn if I am leaking
memory like crazy, although I am not
On Monday, 8 April 2019 at 19:56:50 UTC, Yuxuan Shui wrote:
In this example:
const(AliasSeq!(int, int)) a;
pragma(msg, typeof(a)); // (int, int)
This kind of make sense, since AliasSeq is not a "single" type.
But silently dropping const seems bad, the compiler should
probably report
On 4/6/19 11:47 PM, Alex wrote:
> What you need to tell me is why using .stringof is bad. You have simply
> conjured up a rule and are stating it but not giving any reason why it
> is not a good idea to follow when, in fact, not following can be shown
> to be beneficial.
I'm not Adam, but I've
On 4/7/19 1:30 AM, Nicholas Wilson wrote:
> On Sunday, 7 April 2019 at 05:24:38 UTC, Alex wrote:
>> Error: template instance `Reflect!(type)` cannot use local `type` as
>> parameter to non-global template `Reflect(Ts...)()`
>>
>> mixin(`import `~moduleName!(T)~`;`);
>> mixin(`alias X =
On Sunday, 7 April 2019 at 12:19:10 UTC, bauss wrote:
On Saturday, 6 April 2019 at 20:16:06 UTC, Paul Backus wrote:
On Saturday, 6 April 2019 at 19:31:15 UTC, Robert M. Münch
wrote:
I have a C interface that uses a parameter of type intptr_t.
Wondering if size_t is the correct D equivalent?
On Saturday, 6 April 2019 at 19:31:15 UTC, Robert M. Münch wrote:
I have a C interface that uses a parameter of type intptr_t.
Wondering if size_t is the correct D equivalent?
The correct equivalent is `intptr_t` from `core.stdc.stdint`.
On Friday, 5 April 2019 at 13:59:27 UTC, Alex wrote:
class X(T)
void opOpAssign(string op)(T d)
If T has more than length of one then
x +=
We can work around this but it seems to me that we should be
able to get it to work in some way
x += Alias!(a,b,c)
fails to package it up
On 3/27/19 8:29 PM, Jamie wrote:
> Is it possible to assign to all values in a tuple at once if they are
> the same type?
> I.e.
>
> Tuple!(double, "x", double, "y") t;
> t[] = 1.0;
>
foreach (ref member; t.expand) {
member = 1.0;
}
On Sunday, 24 March 2019 at 16:18:49 UTC, sighoya wrote:
Why
auto GenIf()()
{
return mixin("if(true) { return true;} else {return
false;}");
}
public bool testFunction2()
{
GenIf!();
}
gives me:
onlineapp.d-mixin-3(3): Error: expression expected, not if
onlineapp.d(8): Error:
On Sunday, 17 March 2019 at 10:49:03 UTC, aliak wrote:
Ah! Thanks! So next problem with that:
import std.stdio;
struct S(T) {
T value;
}
auto make(T)(inout auto ref T val) {
return inout(S!T)(val);
}
void main() {
writeln(make("hello") == S!string("hello"));
}
Error: Error:
On Saturday, 16 March 2019 at 11:55:56 UTC, spir wrote:
I think (but may be wrong) that you don't need inout here,
since a plain 'ref' will (and does) work. This is accepted by
me (I added vars to make the code clearer to myself):
struct S(T) {
T value = T.init;
}
auto ref make(T)(ref T
On Saturday, 16 March 2019 at 03:47:43 UTC, Murilo wrote:
Does anyone know if when I create a variable inside a scope as
in
{int a = 10;}
it disappears complete from the memory when the scope finishes?
Or does it remain in some part of the memory? I am thinking of
using scopes to make
On Friday, 15 March 2019 at 23:57:15 UTC, aliak wrote:
Anyone knows how to make this work?
You need an explicit `inout` on the return value of `make`:
auto ref make(T)(inout auto ref T value) {
return inout(S!T)(value);
}
On Wednesday, 13 March 2019 at 17:38:02 UTC, Victor Porton wrote:
Why this template code does not compile?
///
module runnable;
import std.meta;
import std.typecons;
template FieldInfo(argT, string argName) {
template FieldInfo(Nullable!argT argDefault =
Nullable!argT()) {
}
}
On Monday, 11 March 2019 at 17:33:31 UTC, HaraldZealot wrote:
Ah yes, I forget about laziness of `map`. BTW, I have found
other solution, which is more fit to my initial intention.
```d
ReturnType!(std.stdio.File.byLineCopy!(char,
immutable(char)))[] ranges;
foreach(filename; args[1 .. $])
{
On Saturday, 9 March 2019 at 19:18:38 UTC, ANtlord wrote:
Hello everyone! I've encountered the problem which I already
encountered before. Unfortunately, I had no time in the
previous time to report and to talk about it. So I decided to
play making my own "malloc" function in pure D (betterC)
On Monday, 25 February 2019 at 06:51:20 UTC, Yevano wrote:
I am writing a domain specific language of sorts in D for the
lambda calculus. One of my requirements is that I should be
able to generate expressions like this:
new Abstraction(v1, M)
like this:
L!(x => M)
A word of caution: this
On Sunday, 24 February 2019 at 13:09:15 UTC, Victor Porton wrote:
Let f be a variadic function:
Result f(...);
How to implement variadic function g which calls f with the
same arguments as one it receives?
Result g(...) {
// ...
}
If you must use C-style variadic arguments, then your
On Tuesday, 19 February 2019 at 22:43:25 UTC, SrMordred wrote:
import std.traits;
import std.stdio;
struct Test(T)
{
this(T)( auto ref T value )
{
writeln( TemplateOf!(typeof(value)).stringof);
writeln( __traits(isSame, TemplateOf!(typeof(value)), Test)
);
On Tuesday, 19 February 2019 at 18:37:22 UTC, Matthew_Blake wrote:
Hi there,
is the concept of generators (like in Python, using yield)
available in D? If so, where can I find information?
Regards
Generally speaking, things that are generators in Python are
implemented as ranges [1] in D.
On Wednesday, 6 February 2019 at 10:07:06 UTC, Sudhi wrote:
Hi,
I have been using dproto to work with protocol buffers. I have
below proto structure
message Person
{
required string name = 1;
required string id = 2;
repeated string emailId = 3;
}
Where a person can have multiple
On Monday, 4 February 2019 at 22:48:10 UTC, XavierAP wrote:
However one of the possibilities of D is the ability to
generate and execute quite some code at compile time by means
of meta-programming; and I guess here's where staticArray() may
end up being useful enough to have merited
On Sunday, 3 February 2019 at 16:33:48 UTC, Emil wrote:
I tried this on a whim and it appears to work:
auto static_array(T, size_t data_size)()
{
T[data_size] data;
return data;
}
This is actually already in the standard library:
https://dlang.org/phobos/std_array.html#staticArray
On Friday, 25 January 2019 at 15:53:10 UTC, Thomas Gregory wrote:
I would like to check that a char (unknown at compile time)
matches a particular type but I would like to do so without if
statements or a hash map as I would like it to be as fast as
possible.
Ideally I would choose something
On Friday, 25 January 2019 at 19:34:02 UTC, Sebastien Alaiwan
wrote:
On Saturday, 19 January 2019 at 09:24:21 UTC, Kagamin wrote:
On Friday, 18 January 2019 at 18:48:46 UTC, Jonathan M Davis
wrote:
Yes, but some D features will use the GC
They would like to allocate, but they don't know nor
On Thursday, 24 January 2019 at 16:04:06 UTC, Suliman wrote:
Error: static assert: "Cannot convert arguments '(MyUrl)' to
function arguments '(MyUrl*)'."
You've forgotten to change the call site to pass a pointer.
However, it turns out that even if you do that, vibe will not
allow you to
On Thursday, 24 January 2019 at 15:28:19 UTC, Suliman wrote:
I am doing very small link-checker. Here is' code
https://run.dlang.io/is/p8whrA
I am expecting that on line:
writefln("url: %s, status: %s", url.url, url.status);
I will print link and it's status. But I am getting only:
url:
On Monday, 21 January 2019 at 04:52:53 UTC, NaN wrote:
On Sunday, 20 January 2019 at 18:51:54 UTC, Steven
Schveighoffer wrote:
On 1/20/19 1:28 PM, faissaloo wrote:
In Python -1%3 == 2 however in D -1%3 == -1
Is there a standard library function or something that gives
me the Python version of
On Sunday, 20 January 2019 at 16:51:23 UTC, kdevel wrote:
Online but not on a local installation I frequently land on
pages under https://dlang.org/library/ (API Documentation).
What is the reason for this duplicate docs? The API
documentation looks much cleaner and better structured.
On Friday, 11 January 2019 at 04:59:50 UTC, Yui Hosaka wrote:
I want to do something like this:
template S(T) {
}
void main() {
pragma(msg, S!(int).T); // Error: no property `T` for type
`void`
}
You can get the arguments of a template instance as an AliasSeq
using
On Thursday, 3 January 2019 at 17:59:28 UTC, Manfred Nowak wrote:
According to this tutorial
https://wiki.dlang.org/Defining_custom_print_format_specifiers
it seems easy to change the format of the output for
`std.stdio.writef'.
But why is there no example for changing the output when there
On Tuesday, 1 January 2019 at 21:14:09 UTC, Michelle Long wrote:
auto foo(S s)
{
static foreach(k, p; [s, this])
for(int i = 0; i < p.length; i++)
...
}
The idea is to provide single for loop structure for each of
the variables(in this case s and
On Thursday, 27 December 2018 at 03:52:52 UTC, Johannes Loher
wrote:
Hey all,
I am a bit confused about the inferred types of function
literals which do not name their parameters (something like
`(int) {}`). The confusion arises from the fact that the
inferred type sometimes is `void` (might
On Monday, 24 December 2018 at 22:58:03 UTC, Per Nordlöw wrote:
Is it in the following code possible to make the statement
assert(car1 == car2);
in the function testEqual() compile in a `@safe pure nothrow
@nogc context`?
No, because equality comparison between classes lowers to
On Thursday, 13 December 2018 at 13:17:05 UTC, aliak wrote:
Ah. Is there any case where you would not want to do that when
you have a T value as parameter?
And, what if it's "this()(auto ref T value)"? Then moving could
be dangerous if the parameter was passed as a ref. Or maybe it
just
On Wednesday, 12 December 2018 at 20:05:18 UTC, aliak wrote:
Ie:
struct S {
@disable this();
this(int i) {}
}
struct Container(T) {
T value;
this(auto ref T value) {
this.value = value;
}
}
void main() {
auto a = Container!S(S(3)); // can't do this.
}
The
On Tuesday, 11 December 2018 at 17:51:56 UTC, Denis Feklushkin
wrote:
import std.stdio;
import std.range.primitives;
void main()
{
writeln(
typeid(ElementType!(char[2]))
);
static assert(is(ElementType!(char[2]) == dchar)); // why?
}
?
https://run.dlang.io/is/Q74yHm
On Monday, 10 December 2018 at 16:15:36 UTC, aliak wrote:
Ah, that's a good way of breaking it down. But ok, so then the
other version would be lowered to:
template match(handlers...) {
template match(T) {
auto match(T holder) {
return handlers[0](holder);
}
On Saturday, 8 December 2018 at 20:16:09 UTC, Andrew Pennebaker
wrote:
I think it's lame to have to use magical code like
`version(unittest) {} else` to guard our main functions, when
we run unit tests. Could D go ahead and do the right thing,
automatically shadowing our main functions when
On Saturday, 8 December 2018 at 09:57:29 UTC, aliak wrote:
This compiles fine. However, if I change the match template to:
template match(handlers...) {
auto match(alias f)(Holder!f holder) {
return handlers[0](holder);
}
}
Notice the template parameter of the eponymous match
On Wednesday, 5 December 2018 at 21:13:29 UTC, Sjoerd Nijboer
wrote:
A small question.
Is it intended behaviour that public imports inside function
calls fail with the message "Error: found public instead of
statement", or is it an underdocumented feature?
void foo()
{
public import bar;
On Sunday, 2 December 2018 at 14:50:05 UTC, Sjoerd Nijboer wrote:
The idea being that bar can be packed in a library and the
program that includes this library can decide what parameters
will be added to foo whitout any runtime overhead and ugly
looking syntax.
The normal way to do this
On Saturday, 17 November 2018 at 06:19:25 UTC, Alex wrote:
It can happen, that the input params are correct, however, the
calculation lasts too long. Is there a way, to measure the
execution time of foo (á la benchmark) and then, if some
execution time limit is exceeded to interrupt the
On Thursday, 8 November 2018 at 13:58:55 UTC, Vinay Sajip wrote:
Excuse my ignorance, but from looking at the documentation on
std.range and a quick skim of the guides mentioned there near
the top, I can't see what the simple way is of creating an
InputRange!(ubyte) from strings, files etc. I
On Sunday, 4 November 2018 at 01:17:01 UTC, Luigi wrote:
I need to call a function that can create a function from an
array of functions and calls them in reverse order. I am
learning D any help would be
import std.stdio;
import std.algorithm;
import std.array : array;
import std.range;
On Monday, 29 October 2018 at 21:50:32 UTC, aliak wrote:
Hi, so if you have this piece of code:
struct C {
void f() {
string[] others;
const string[] restArgs;
foreach (i, arg; args) {
if (isValidArg(arg)) {
restArgs = args[i + 1 .. $];
break;
}
On Thursday, 25 October 2018 at 12:25:37 UTC, Eduard Staniloiu
wrote:
As I wrote in the comments above, I was expecting `a[] = b[]`
to iterate the slices and assign the elements of b into a.
What really happens is a memcpy: as you can see from godblot
[0], this gets lowered to a call to
On Thursday, 18 October 2018 at 14:08:11 UTC, aliak wrote:
On Wednesday, 17 October 2018 at 23:34:55 UTC, Paul Backus
wrote:
auto x = () {
// do some heavy stuff
};
if (condition) {
func(x().y); // heavy stuff evaluated here
}
That would do heavy stuff everytime i wanted to get y
On Wednesday, 17 October 2018 at 07:32:37 UTC, aliak wrote:
lazy S x = () {
// do some heavy stuff
}();
if (condition) {
func(x.y); // heavy stuff evaluated here
}
auto x = () {
// do some heavy stuff
};
if (condition) {
func(x().y); // heavy stuff evaluated here
}
If you want
On Wednesday, 17 October 2018 at 07:01:21 UTC, test wrote:
test1:
module test1;
import test2;
enum X = getR(1,3);
void main(string[] args){}
test2:
module test2;
struct R {
int i;
}
R[] getR(int a, int b){
R[] r;
r ~=
On Wednesday, 10 October 2018 at 22:56:14 UTC, James Japherson
wrote:
The point of all this is because D does not allow nesting of
enums
which allows for nice use of . to separate hiearchies:
enum A
{
enum B
{
X,
}
}
A.B.X, rather than having to have one large flat enum and do
On Wednesday, 10 October 2018 at 12:10:06 UTC, bauss wrote:
On Wednesday, 10 October 2018 at 08:16:11 UTC, Kagamin wrote:
How do you want to use parameter names of an arbitrary
function?
What I want to do is pass a function to a template and that
template creates a function with the same
On Friday, 5 October 2018 at 06:56:49 UTC, Nicholas Wilson wrote:
On Friday, 5 October 2018 at 06:44:08 UTC, Nicholas Wilson
wrote:
Alas is does not because each does not accept additional
argument other than the range. Shouldn't be hard to fix though.
On Wednesday, 3 October 2018 at 07:57:07 UTC, drug wrote:
According to https://dlang.org/articles/ctarguments.html
compile time sequences "...allow a programmer to operate on
types, symbols and values..."
Phobos has `isType`/`isTypeTuple` traits, also `isExpressions`
where expression may
On Thursday, 20 September 2018 at 07:24:52 UTC, berni wrote:
I need to execute a program and capture stdout, which I hoped
std.process.execute would do. But unfortunatly this command
also captures stderr, which I need to be ignored. When looking
at the implementation of std.process.execute I
On Sunday, 16 September 2018 at 10:55:43 UTC, berni wrote:
The problem is more general: you can only use top-level
symbols in UFCS.
You can use an identity alias template to bypass this:
https://blog.thecybershadow.net/2015/04/28/the-amazing-template-that-does-nothing/
(search for UFCS in the
On Saturday, 15 September 2018 at 20:04:36 UTC, berni wrote:
Anotherone I'm not getting to work: From some output with
newlines I want to discard all lines, that start with a # and
select part of the other lines with a regex. (I know the regex
r".*" is quite useless, but it will be replaced by
On Saturday, 15 September 2018 at 05:39:48 UTC, berni wrote:
Oh, thanks. What I didn't know about was join. Now I wonder how
I could have found out about it, without asking here? Even yet
I know it's name I cannot find it, nighter in the language
documentation nor in the library documentation.
On Friday, 14 September 2018 at 20:43:45 UTC, SrMordred wrote:
What you want is std.range.chunks
auto a = [1,0,1,1,1,0,1,0,1,1,1,1,0];
a.map!(to!string)
.join("")
.chunks(4)
.map!(to!string) //don´t know why the chunks are not
already strings at this point ;/
On Wednesday, 12 September 2018 at 15:12:16 UTC, Anonymouse wrote:
void doByPair(Args...)(Args args)
if (Args.length)
{
foreach (pair; args.pairwise)
{
static assert(is(typeof(pair[0]) == string));
static assert(isPointer!(pair[1]));
assert(pair[1] !is null);
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