Re: AA behaves differently in CTFE?

2015-11-24 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 24 November 2015 at 14:23:38 UTC, Steven Schveighoffer wrote: If CTFE associative arrays perform differently, then that is a bug. I am not sure if this is the case, but you should file a bug anyway, someone can take a look at it. If you can narrow it down to a minimal case where

Re: AA behaves differently in CTFE?

2015-11-24 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 24 November 2015 at 07:54:24 UTC, Bastiaan Veelo wrote: This results TRUE at compile time, but FALSE at run time. Sorry, that should be the reverse: TRUE at run time, FALSE at compile time. Compile time exhibits the unexpected behaviour.

AA behaves differently in CTFE?

2015-11-23 Thread Bastiaan Veelo via Digitalmars-d-learn
Pegged uses an associative array to prevent infinite recursion [1]. This fails on some input, but only when used in CTFE [2]. The reduced case follows. I presume this is a bug? [1] https://github.com/PhilippeSigaud/Pegged/blob/master/pegged/dev/introspection.d#L281 [2]

Re: joiner: How to iterate over immutable ranges?

2016-02-15 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 15 February 2016 at 01:14:10 UTC, Ali Çehreli wrote: On 02/14/2016 11:32 AM, Bastiaan Veelo wrote: If it's acceptable for you, the following code calls .save on the elements and it works: import std.algorithm.iteration; import std.stdio; import std.array;// <-- ADDED void

Re: joiner: How to iterate over immutable ranges?

2016-02-15 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 15 February 2016 at 01:42:30 UTC, Mike Parker wrote: On Sunday, 14 February 2016 at 19:32:31 UTC, Bastiaan Veelo wrote: Maybe this [1] will help shed some light. [1] https://www.packtpub.com/books/content/understanding-ranges Good idea. I have your book, but it is very nice to

Re: joiner: How to iterate over immutable ranges?

2016-02-15 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 15 February 2016 at 18:13:48 UTC, Ali Çehreli wrote: On 02/15/2016 06:25 AM, Bastiaan Veelo wrote: > I didn't even know about save... Its documentation is hidden > quite > well, because I still cannot find it. Heh. :) It is a part of the ForwardRange interface (more correctly,

Re: joiner: How to iterate over immutable ranges?

2016-02-14 Thread Bastiaan Veelo via Digitalmars-d-learn
On Sunday, 14 February 2016 at 18:28:11 UTC, Jonathan M Davis wrote: An immutable range fundamentally does not work. The same goes with const. In fact, a type that's immutable is going to fail isInputRange precisely because it can't possibly function as one. While empty and front may be

joiner: How to iterate over immutable ranges?

2016-02-14 Thread Bastiaan Veelo via Digitalmars-d-learn
Hi, I am having trouble getting the iteration methods in std.algorithm.iteration to work on immutable data: import std.algorithm.iteration; import std.stdio; void main() { string[][] cycles; cycles ~= ["one", "two"]; cycles ~= ["three", "four"]; foreach

Re: Array start index

2017-02-07 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 6 February 2017 at 23:42:55 UTC, Ali Çehreli wrote: Then you use _ptr when indexing: // Support e = arr[5]; ref T opIndex(ptrdiff_t index) { assert(index >= first); assert(index <= last); return *(_ptr + index); } Ali Thank you very much for

Re: Array start index

2017-02-07 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 7 February 2017 at 20:28:30 UTC, Ali Çehreli wrote: You forgot to call that most important function. ;) Hah of course. I assumed the name would give it some special meaning, like postblit. 1) I don't understand the first assert there, which does not pass for me, so I commented

Re: Array start index

2017-02-07 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 7 February 2017 at 20:33:35 UTC, Ali Çehreli wrote: On 02/07/2017 02:11 AM, Bastiaan Veelo wrote: > We do not need to take measures against the GC? Of course we have to and the struct that I wrote is illegal because it is self-referencing through the _ptr member. (D has the right

Re: Array start index

2017-02-06 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 4 August 2015 at 08:18:50 UTC, Marc Schütz wrote: void opIndexAssign(U : T)(size_t index, auto ref U value) { Careful here, you've got the arguments reversed. The unit test didn't detect this because it was ambiguous. This one isn't: unittest {

Re: Array start index

2017-02-06 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 6 February 2017 at 14:26:35 UTC, Bastiaan Veelo wrote: The unit test didn't detect this because it was ambiguous. Sorry for that misinformation. I should have said that opIndexAssign wasn't tested. Here is a better test. unittest { OneBasedArray!int arr; arr =

Re: Array start index

2017-02-06 Thread Bastiaan Veelo via Digitalmars-d-learn
(There is an honest question in the end, please read on.) All good reasons set aside, both in favour and against 0-based arrays, the only reason that is relevant to me right now is that we are seriously looking into translating close to a million lines of foreign code to D, from a language

Re: Array start index

2017-02-08 Thread Bastiaan Veelo via Digitalmars-d-learn
Wrapup: I am going to go for the original approach of index conversion, and leaving the offset-pointer approach for what it is. Reasons: 1) uncertain efficiency gain/loss, 2) theoretically it may fail, 3) .sizeof does not include the payload, 4) analysis of the assembler generated by our

Re: Alias type with different initialiser.

2017-02-14 Thread Bastiaan Veelo via Digitalmars-d-learn
Thanks again. On Tuesday, 14 February 2017 at 14:08:31 UTC, John Colvin wrote: I would recommend making `template from(string moduleName)` global (maybe in a utils module?), there's no reason for it to be a member of Initial. Yes, I think there is high chance it will be part of Phobos, if

Re: Alias type with different initialiser.

2017-02-13 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 13 February 2017 at 16:40:02 UTC, Daniel Kozak wrote: https://dlang.org/phobos/std_typecons.html#.Typedef Thanks for the pointers. Both Typedef and Proxy create types that don't mix with the base type, which I want to the contrary. So I guess I'll go with struct Initial(T, T

Re: Alias type with different initialiser.

2017-02-14 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 13 February 2017 at 22:59:11 UTC, John Colvin wrote: Why not use a constructor instead of static opCall? I don't know, this comes from http://dlang.org/spec/struct.html#dynamic_struct_init. Your constructor looks a lot better. Am I missing a test case where static opCall would be

Re: Alias type with different initialiser.

2017-02-14 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 14 February 2017 at 01:31:10 UTC, John Colvin wrote: On Monday, 13 February 2017 at 22:59:11 UTC, John Colvin wrote: [ snip ] sorry, made a typo, that should have been alias int1 = Initial!(int, 1); static assert(int1.initial == 1); // typeof(int1.initial) == int

Alias type with different initialiser.

2017-02-13 Thread Bastiaan Veelo via Digitalmars-d-learn
Hi, In Extended Pascal, you can derive from a basic type and change the default initialiser like so: type int1 = integer value 1; var i : int1; ii : int1 value 2; assert(i = 1); assert(ii = 2); I have it working in D, but it seems a little clumsy. Is there a better way?

Why do static arrays affect executable size?

2017-02-10 Thread Bastiaan Veelo via Digitalmars-d-learn
// enum int maxarray = 0; enum int maxarray = 2_000_000; double[maxarray] a, b, c, d; void main() {} Compiled using "dub build --arch=x86_64 --build=release" on Windows (DMD32 D Compiler v2.073.0), the exe size is 302_592 bytes v.s. 64_302_592 bytes, depending on the array length. Is that

Re: Why is for() less efficient than foreach?

2017-02-10 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 10 February 2017 at 12:58:19 UTC, Stefan Koch wrote: If you want it to modify the array you have to use a ref elem. If you do you will see that foreach is a little slower. Thanks, I should have spotted that. Bastiaan.

Re: Why is for() less efficient than foreach?

2017-02-10 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 10 February 2017 at 12:57:38 UTC, biozic wrote: On Friday, 10 February 2017 at 12:39:50 UTC, Bastiaan Veelo wrote: void foreach_loop() { foreach(n, elem; d[]) elem = a[n] * b[n] / c[n]; } It's fast because the result of the operation (elem) is

Why is for() less efficient than foreach?

2017-02-10 Thread Bastiaan Veelo via Digitalmars-d-learn
Benchmarking for() against foreach(): / enum size_t maxarray = 500_000; double[maxarray] a, b, c, d; void main() { import std.stdio; import std.datetime; import std.random; for (int n = 0; n < maxarray; n++) { a[n] = uniform01; b[n] = uniform01;

Re: Why do static arrays affect executable size?

2017-02-11 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 11 February 2017 at 00:16:04 UTC, sarn wrote: If you explicitly initialise the array to all 0.0, you should see it disappear from the binary. I was actually wondering whether initialisation would make a difference, so thank you for this. Bastiaan.

Re: Why do static arrays affect executable size?

2017-02-11 Thread Bastiaan Veelo via Digitalmars-d-learn
Thanks for the clarifications.

Re: Parallel foreach over AliasSec?

2017-02-27 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 27 February 2017 at 11:53:09 UTC, ag0aep6g wrote: You can generate wrapper functions that have no overloads: static int wrap(alias f)(int arg) { return f(arg); } enum addrOf(alias f) = enum fptrs = staticMap!(addrOf, staticMap!(wrap, funcs)); /* ... r and foreach as before ...

Re: Parallel foreach over AliasSec?

2017-02-26 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 27 February 2017 at 02:02:57 UTC, ag0aep6g wrote: Make a range or an array of function pointers from the AliasSeq of function aliases: import std.meta: staticMap; import std.range: only; enum fptr(alias f) = enum fptrs = staticMap!(fptr, funcs); auto r = only(fptrs); foreach

Parallel foreach over AliasSec?

2017-02-26 Thread Bastiaan Veelo via Digitalmars-d-learn
Hi, Is it possible to parallelise the iteration over an AliasSec? Ordinary parallel foreach does not work. I have tried submitting tasks to taskPool in an ordinary foreach, but I can't because i cannot be read at compile time. int one(int) {return 1;} int two(int) {return 2;} int three(int)

Re: Parallel foreach over AliasSec?

2017-02-27 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 27 February 2017 at 02:02:57 UTC, ag0aep6g wrote: Make a range or an array of function pointers from the AliasSeq of function aliases: import std.meta: staticMap; import std.range: only; enum fptr(alias f) = enum fptrs = staticMap!(fptr, funcs); auto r = only(fptrs); foreach

Re: Parallel foreach over AliasSec?

2017-02-27 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 27 February 2017 at 16:04:00 UTC, Bastiaan Veelo wrote: I get a bus error some time out in execution. It could be that I am running out of stack space. I am on OS X, and non-main threads are given a very limited stack size, they say [1, 2]. This foreach of mine calls into itself,

readf interferes with readln

2017-04-27 Thread Bastiaan Veelo via Digitalmars-d-learn
Hi, I am having trouble explaining the following to someone learning D. Can someone explain why readln has different behaviour when it is preceded by readf? Suppose we want to not end the program before the user presses Enter by having readln at the end of main(): ``` import std.stdio;

Re: readf interferes with readln

2017-04-27 Thread Bastiaan Veelo via Digitalmars-d-learn
On Thursday, 27 April 2017 at 08:37:26 UTC, ketmar wrote: Bastiaan Veelo wrote: Hi, I am having trouble explaining the following to someone learning D. Can someone explain why readln has different behaviour when it is preceded by readf? Suppose we want to not end the program before the

Re: ldc D compiler installation on windows 10

2017-08-07 Thread Bastiaan Veelo via Digitalmars-d-learn
On Sunday, 6 August 2017 at 23:44:27 UTC, greatsam4sure wrote: Good day. I will appreciate it if anybody here can help me with the step by step way of installing ldc D compiler on windows. I have read online info but i just don't get it. let the process be in steps for easy

Re: VibeD - REST API and vibed.web.auth framework

2017-08-07 Thread Bastiaan Veelo via Digitalmars-d-learn
On Sunday, 6 August 2017 at 16:47:14 UTC, holo wrote: Hello I'm trying to use auth framework with REST api ( http://vibed.org/api/vibe.web.auth/ ). Is it possible to use it with registerRestInterface? According to description under: http://vibed.org/api/vibe.web.auth/requiresAuth it should

Re: As many thanks As possible to who crates D and UFCS feature

2017-05-12 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 12 May 2017 at 11:10:01 UTC, k-five wrote: I was waiting for a stable version of C++17 ( standard library ) to add some features of fileSystem in C++17 to my program that wants to iterate through all files in a directory recursively. I was thinking how could I do for implementing

Re: As many thanks As possible to who crates D and UFCS feature

2017-05-13 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 13 May 2017 at 08:23:55 UTC, k-five wrote: On Friday, 12 May 2017 at 20:53:56 UTC, Bastiaan Veelo wrote: Is it safe to say that these 40 lines of D do the same as your 324 lines of C++ [1]? No. I cannot say that. Since this is not a full port of renrem in C++ to D. It was just

Re: As many thanks As possible to who crates D and UFCS feature

2017-05-13 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 13 May 2017 at 10:51:09 UTC, k-five wrote: Okay, and NOW I understood what you are trying to say. First of all I thought you got mad at me. And I became sad. My sincere apologies! Always assume the best in people :-) I am glad you asked for clarification. [...] Still I am a

Re: How to avoid throwing an exceptions for a built-in function?

2017-05-13 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 13 May 2017 at 09:51:40 UTC, k-five wrote: On Saturday, 13 May 2017 at 09:05:17 UTC, Jonathan M Davis But obviously, to know what's actually happening with your code, you're going to have to profile and benchmark it - Can you please give a link or page or something to read about

Re: As many thanks As possible to who crates D and UFCS feature

2017-05-12 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 12 May 2017 at 15:24:52 UTC, k-five wrote: On Friday, 12 May 2017 at 11:10:01 UTC, k-five wrote: I was waiting for a stable version of C++17 ( standard library ) to add some features of fileSystem in C++17 to my program that wants to iterate through all files in a directory

Re: As many thanks As possible to who crates D and UFCS feature

2017-05-12 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 12 May 2017 at 15:24:52 UTC, k-five wrote: A full version that I just added to my gitgub: https://github.com/k-five/dren You may like getopt[1] for command line argument parsing. https://dlang.org/phobos/std_getopt.html

trait detecting anonymous union?

2017-05-22 Thread Bastiaan Veelo via Digitalmars-d-learn
` void main() { import std.stdio; struct S { int i; union { int a; double b; } } S s; writeln(s); // S(10, #{overlap a,

Re: trait detecting anonymous union?

2017-05-23 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 22 May 2017 at 22:11:15 UTC, Stanislav Blinov wrote: On Monday, 22 May 2017 at 21:03:42 UTC, Bastiaan Veelo wrote: Is there a way to detect at CT that S has overlapping data members, when an anonimous union is used as above? There isn't a built-in one. The best I can muster at

Re: trait detecting anonymous union?

2017-05-23 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 23 May 2017 at 01:02:59 UTC, Vladimir Panteleev wrote: On Monday, 22 May 2017 at 21:03:42 UTC, Bastiaan Veelo wrote: Is there a way to detect at CT that S has overlapping data members, when an anonimous union is used as above? I have an implementation here:

Re: Ddoc and struct members

2017-12-14 Thread Bastiaan Veelo via Digitalmars-d-learn
On Thursday, 14 December 2017 at 03:17:10 UTC, rikki cattermole wrote: On 14/12/2017 3:16 AM, n00nb wrote: I don't understand if there is a way to generate documentation for all the members without putting a '///' over every member There isn't. It doesn’t need to take any vertical space

Re: ddox empty public methods/interfaces etc

2017-11-13 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 10 November 2017 at 10:12:32 UTC, RazvanN wrote: I don't want to open a new forum thread for this, but if you guys have more experience with ddox can you please explain me how does it work? I expected you can simply run ddox on a .d file and it will output the documentation in some

How to inform dub of generated source files?

2018-05-17 Thread Bastiaan Veelo via Digitalmars-d-learn
Hi, Context: https://github.com/veelo/Pascal2D One of my source files is generated by executing `cd source && rdmd generate.d`, which creates the file `source/epparser.d`. (There is actually one step in between, calling `rdmd make.d`, which checks creation times, but that's not relevant

Template instantiation fails on Linux, succeeds on Windows

2018-05-17 Thread Bastiaan Veelo via Digitalmars-d-learn
Hi! The code in [1] compiles and runs flawlessly on Windows, but not on Linux (neither run.dlang nor Travis docker image). Any idea what can be done? errors: Error: undefined identifier __va_list_tag onlineapp.d(282): Error: template instance `onlineapp.SetFactory!byte` error instantiating

Re: How to inform dub of generated source files?

2018-05-17 Thread Bastiaan Veelo via Digitalmars-d-learn
On Thursday, 17 May 2018 at 17:42:21 UTC, Bastiaan Veelo wrote: Isn't preGenerateCommands meant to cover this case? Appears to be a bug. Filed https://github.com/dlang/dub/issues/1474

Re: Template instantiation fails on Linux, succeeds on Windows

2018-05-17 Thread Bastiaan Veelo via Digitalmars-d-learn
On Thursday, 17 May 2018 at 23:18:32 UTC, Basile B. wrote: On Thursday, 17 May 2018 at 22:07:46 UTC, Bastiaan Veelo wrote: Hi! The code in [1] compiles and runs flawlessly on Windows, but not on Linux (neither run.dlang nor Travis docker image). Any idea what can be done? Hello. Yes, add

File.put()

2018-06-08 Thread Bastiaan Veelo via Digitalmars-d-learn
Writing a single value to binary file can be done in (at least) two ways. Let `f` be a `File`: ``` f.rawWrite(()[0 .. 1]); ``` or ``` f.lockingBinaryWriter.put(value); ``` The former way is little talked about, the latter is not even documented. As far as I can see, the latter resolves to

Re: UCFS does not work for nested functions?

2018-06-18 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 18 June 2018 at 17:58:11 UTC, Steven Schveighoffer wrote: On 6/18/18 1:25 PM, bauss wrote: On Monday, 18 June 2018 at 17:16:29 UTC, aliak wrote: On Monday, 18 June 2018 at 14:19:30 UTC, Steven Schveighoffer wrote: On 6/18/18 7:16 AM, Bastiaan Veelo wrote: On Sunday, 18 May 2014 at

Re: UCFS does not work for nested functions?

2018-06-18 Thread Bastiaan Veelo via Digitalmars-d-learn
On Sunday, 18 May 2014 at 08:15:08 UTC, Steffen Wenz wrote: Hi, Just noticed that using UFCS does not work for nested functions, and was wondering whether that's intended, and what the rationale behind it is: I just had the same question. I can imagine that the context pointer of nested

Re: UCFS does not work for nested functions?

2018-06-18 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 18 June 2018 at 19:31:39 UTC, Steven Schveighoffer wrote: In other words, if UFCS meant that module-level symbols took precedent over local symbols, then it's backwards in terms of which place usually wins. Generally it's the local symbols. Ah, you mean it would have to be that way

Line endings when redirecting output to file on windows.

2018-06-03 Thread Bastiaan Veelo via Digitalmars-d-learn
I need some help understanding where extra '\r' come from when output is redirected to file on Windows. First, this works correctly: rdmd --eval="(\"hello\" ~ newline).toFile(\"out.txt\");" As expected, out.txt contains "hello\r\n". I would expect the following to do the same, but it doesn't:

Re: Line endings when redirecting output to file on windows.

2018-06-03 Thread Bastiaan Veelo via Digitalmars-d-learn
On Sunday, 3 June 2018 at 15:42:48 UTC, rikki cattermole wrote: On 04/06/2018 3:24 AM, Bastiaan Veelo wrote: I need some help understanding where extra '\r' come from when output is redirected to file on Windows. First, this works correctly:  rdmd --eval="(\"hello\" ~

Re: Line endings when redirecting output to file on windows.

2018-06-05 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 4 June 2018 at 15:31:04 UTC, Steven Schveighoffer wrote: Windows C library has this bizarro mode for FILE * called "text" mode, which is the default. In this mode, it scans all output, and anywhere it sees a '\n', it replaces it with "\r\n". Thanks, Steven.

BitArray shift left/right confusion.

2017-12-27 Thread Bastiaan Veelo via Digitalmars-d-learn
I suppose the following is not a bug, but confusing it is: ``` void main() { import std.stdio; import std.bitmanip; BitArray ba = [1, 1, 1, 1, 1, 1, 1, 1]; writeln(ba);// [1, 1, 1, 1, 1, 1, 1, 1] ba >>= 4; // right shift writeln(ba);// [1, 1,

Does dub support generating source files?

2018-01-06 Thread Bastiaan Veelo via Digitalmars-d-learn
Hi, One of my source files (epparser.d) should be generated by calling rdmd on another soure file (make.d) and therefore should depend on changes in make.d and an additional module (epgrammar.d). An include path to Pegged is required for compilation. epparser.d should be part of the main

Re: Does dub support generating source files?

2018-01-06 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 6 January 2018 at 13:40:54 UTC, rikki cattermole wrote: On 06/01/2018 1:23 PM, Bastiaan Veelo wrote: Can dub do this or is this a thing for reggae? It must work on Windows though. Thanks! See: https://github.com/Abscissa/gen-package-version That seems to be a good tip,

Re: Does dub support generating source files?

2018-01-06 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 6 January 2018 at 13:40:54 UTC, rikki cattermole wrote: On 06/01/2018 1:23 PM, Bastiaan Veelo wrote: I could script a custom preBuildCommand that checks modification dates and supplies the Pegged include path explicitly but that seems hackish and non-portable and typically

Re: Finding ElementType

2018-01-07 Thread Bastiaan Veelo via Digitalmars-d-learn
On Sunday, 7 January 2018 at 13:50:23 UTC, Adam D. Ruppe wrote: On Sunday, 7 January 2018 at 12:40:22 UTC, Bastiaan Veelo wrote: 1) Should we have a reference in the docs for std.traits to std.range.primitive : ElementType? wouldn't hurt i guess 2) Should phobos contain a version without the

Finding ElementType

2018-01-07 Thread Bastiaan Veelo via Digitalmars-d-learn
The learn forum is great not only for asking questions, but also for learning from the questions by others: I just learned about the existence of std.range.primitives: ElementType, a function that I have looked for in phobos before, without finding it. I had expected this to be in std.traits

Re: `Alias this` to a mixed in property

2018-01-24 Thread Bastiaan Veelo via Digitalmars-d-learn
On Wednesday, 24 January 2018 at 14:21:42 UTC, ag0aep6g wrote: The spec says that you cannot make an overload set just by mixing in multiple functions/methods with the same name. Instead, you have to do it like this: mixin getter g; mixin setter!int s; alias p = g.p; alias p = s.p;

Re: Shouldn't D be added to this list?

2018-02-07 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 6 February 2018 at 22:36:09 UTC, WhatMeWorry wrote: https://www.khronos.org/opengl/wiki/Language_bindings I was thinking that with derelictGL, D should be on this list? If so, I'm not sure how one would go about this? It is a wiki, anybody can add it, me thinks.

Re: BitArray shift left/right confusion.

2018-02-03 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 2 February 2018 at 00:33:03 UTC, Jakub Łabaj wrote: On the other hand, shifting operators are equally confusing for me, as they are for you - they really work in the other way around! I thought this is a very weird bug, but I found this pull request:

Re: BitArray shift left/right confusion.

2017-12-28 Thread Bastiaan Veelo via Digitalmars-d-learn
On Wednesday, 27 December 2017 at 20:45:49 UTC, Biotronic wrote: BitArray is apparently a mess. Thanks for your confirmation, digging and reporting issues https://issues.dlang.org/show_bug.cgi?id=18133 and https://issues.dlang.org/show_bug.cgi?id=18134 (Turns out we both live in the same

Re: Newbie: out-of-source builds with "dub"?

2018-07-30 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 30 July 2018 at 01:50:23 UTC, CC wrote: [...] My usual modus operandi is: 1. check out the project into some directory "foo". 2. create another directory "foo.build", somewhere outside of "foo". 3. "cd foo.build" 4. Run some configuration script/file located in "foo", to generate

Re: Dub project has both .sdl and .json files. Is this normal or did I do something wrong?

2018-08-03 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 19 December 2017 at 10:15:18 UTC, Jacob Carlborg wrote: On 2017-12-18 23:36, WhatMeWorry wrote: [...] But when I look the directory that has the dub.sdl file, I also see a file called dub.selections.json { "fileVersion": 1, "versions": {     "derelict-al":

Re: Dub project has both .sdl and .json files. Is this normal or did I do something wrong?

2018-08-05 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 4 August 2018 at 17:53:45 UTC, Neia Neutuladh wrote: On Friday, 3 August 2018 at 19:41:32 UTC, Bastiaan Veelo wrote: But if you commit it, and a compiler deprecation causes a dependency in that pinned version to fail to compile, then your app won't compile either, even though your

`Alias this` to a mixed in property

2018-01-24 Thread Bastiaan Veelo via Digitalmars-d-learn
Hi, `Alias this` to mixed in properties does not seem to work, see below. If you think it should, I'll file an issue. Otherwise: can this be made to work somehow? Interestingly, if you uncomment either the mixin getter or setter (row 36 or 37) and its corresponding use in `main`, then the

CT BitArray

2018-10-31 Thread Bastiaan Veelo via Digitalmars-d-learn
Currently, BitArray is not usable at compile time, so you cannot do ``` enum e = BitArray([1, 1, 1, 0]); ``` This gives /dlang/dmd/linux/bin64/../../src/phobos/std/bitmanip.d(1190): Error: `bts` cannot be interpreted at compile time, because it has no available source code IIUC, that is

Re: CT BitArray

2018-11-01 Thread Bastiaan Veelo via Digitalmars-d-learn
On Thursday, 1 November 2018 at 00:01:04 UTC, Stefan Koch wrote: On Wednesday, 31 October 2018 at 23:14:08 UTC, Bastiaan Veelo wrote: Currently, BitArray is not usable at compile time, so you cannot do ``` enum e = BitArray([1, 1, 1, 0]); ``` This gives

Re: CT BitArray

2018-11-01 Thread Bastiaan Veelo via Digitalmars-d-learn
On Thursday, 1 November 2018 at 00:01:04 UTC, Stefan Koch wrote: Tell me which version are you using and I'll make it for you. By the way this is a really generous offer, thanks for being like that!

Re: Determination of thread status.

2018-12-26 Thread Bastiaan Veelo via Digitalmars-d-learn
On Wednesday, 26 December 2018 at 05:43:47 UTC, Vitaly wrote: On Tuesday, 25 December 2018 at 17:08:00 UTC, Neia Neutuladh wrote: 1. Find the Thread object: Tid threadId = spawn(); auto thread = Thread.getAll.filter!(x => x.id == threadId).front; 2. Check the `isRunning` property. The

Re: Determination of thread status.

2018-12-25 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 25 December 2018 at 14:44:43 UTC, Vitaly wrote: Hi all. I can not understand how to track me that the thread has finished work. eg: import std.concurrency; void myThread () { // Do the work } void main () { Tid thread = spawn (& myThread); // It is necessary to check whether the

Re: Duplicate class/interface/struct completely

2019-03-26 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 26 March 2019 at 05:29:08 UTC, Michelle Long wrote: The idea is to be able to make sure one can modify a class and drop it in for the original and it work in all cases. With alias this, it can fail unless we can alias it too. This sounds like mocking, this answer might be of help:

Re: Why this eponymous template does not compile?

2019-03-25 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 25 March 2019 at 09:27:03 UTC, Victor Porton wrote: /tmp/temp_7F3C101460D0.d(9,5): Error: template instance `synchronizedMemoize!f` template `synchronizedMemoize` is not defined, did you mean sychronizedMemoize(alias fun)()? Why the error? Sometimes, template error messages are

Re: CTFE & code generators based on PEG grammars?

2019-04-06 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 6 April 2019 at 12:06:22 UTC, Robert M. Münch wrote: The idea is, that I can write a string (or maybe even a scope block?) in my DSL and use a CTFE grammer to transpile the code. Are you aware of Pegged[1]? It’s for exactly that. [1] http://code.dlang.org/packages/pegged

Re: Odd behavior of darray.dup

2019-02-24 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 23 February 2019 at 23:35:14 UTC, solidstate1991 wrote: On Saturday, 23 February 2019 at 19:21:10 UTC, Bastiaan Veelo wrote: It works for me: https://run.dlang.io/gist/473b0021487275751accaebeb00be05c -- Bastiaan Still no luck, not even with memcpy. There's even more mystery

Re: How to call other variadic function with the same arguments?

2019-02-24 Thread Bastiaan Veelo via Digitalmars-d-learn
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(...) { // ... } I don’t know if you can, but if at least g is a variadic

Re: Odd behavior of darray.dup

2019-02-24 Thread Bastiaan Veelo via Digitalmars-d-learn
On Sunday, 24 February 2019 at 12:10:22 UTC, Bastiaan Veelo wrote: 1) You get "immutable(Color)(#{overlap raw, colors})" on immutable Color because the `Color.toString()` method is not const (corrected in the Gist). This is a bug in pixelperfectengine. Likewise, getters like `green()` should

Re: Odd behavior of darray.dup

2019-02-23 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 22 February 2019 at 11:36:35 UTC, solidstate1991 wrote: If I want to copy an array of structs with .dup (cannot post the link in question here at the moment due to non-working clipboard, it's Color from pixelperfectengine.graphics.common) I get all zeroes instead of the values from

Re: Phobos in BetterC

2019-03-09 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 8 March 2019 at 09:24:25 UTC, Vasyl Teliman wrote: I've tried to use Mallocator in BetterC but it seems it's not available there: https://run.dlang.io/is/pp3HDq This produces a linker error. I'm wondering why Mallocator is not available in this mode (it would be intuitive to

Re: PyD - accessing D class fields in Python

2019-03-19 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 18 March 2019 at 22:25:10 UTC, clothlen wrote: Howdy; I'm trying to extend my Python program with D, but I'm having trouble accessing a D class's field/attribute/property/something. My D file looks like this: ``` module simpletest; import pyd.pyd; import std.stdio; class

Re: Compile-time associative array

2019-03-19 Thread Bastiaan Veelo via Digitalmars-d-learn
On Tuesday, 19 March 2019 at 08:50:15 UTC, boolangery wrote: Hi, I want to use a constant associative array in a ctfe-able function. Example: string ctfeableFunction() { return Foo["foo"]; } Then I force ctfe with: enum res = ctfeableFunction(); When I use an enum like: enum Foo =

Re: Compile-time associative array

2019-03-20 Thread Bastiaan Veelo via Digitalmars-d-learn
On Wednesday, 20 March 2019 at 08:11:27 UTC, boolangery wrote: Got it ! Thank you, so I need to write: enum string[string] CtfeFoo = ["foo" : "bar"]; static immutable string[string] Foo; static this() { Foo = CtfeFoo; } string ctfeableFunction() { if (__ctfe) return

Re: why is ifThrown un@safe?

2019-03-15 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 15 March 2019 at 19:19:41 UTC, H. S. Teoh wrote: On Fri, Mar 15, 2019 at 06:46:25PM +, bauss via Digitalmars-d-learn wrote: On Friday, 15 March 2019 at 18:04:05 UTC, Bastiaan Veelo wrote: > In the code below (https://run.dlang.io/is/d0oTNi), ifThrown > is inferred as un@safe. If

Re: why is ifThrown un@safe?

2019-03-15 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 15 March 2019 at 18:46:25 UTC, bauss wrote: On Friday, 15 March 2019 at 18:04:05 UTC, Bastiaan Veelo wrote: In the code below (https://run.dlang.io/is/d0oTNi), ifThrown is inferred as un@safe. If instead I write the implementation of ifThrown out (after res2) then it is @safe. As

Re: why is ifThrown un@safe?

2019-03-15 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 15 March 2019 at 19:24:17 UTC, Bastiaan Veelo wrote: Will do the filing and maybe experiment a bit. Bastiaan. https://issues.dlang.org/show_bug.cgi?id=19741

why is ifThrown un@safe?

2019-03-15 Thread Bastiaan Veelo via Digitalmars-d-learn
In the code below (https://run.dlang.io/is/d0oTNi), ifThrown is inferred as un@safe. If instead I write the implementation of ifThrown out (after res2) then it is @safe. As far as I can see, there is no real difference. So why doesn't ifThrown work in this case, and can it be made to work?

Re: Generalizing over function pointers and delegates

2019-02-15 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 15 February 2019 at 16:40:39 UTC, ag0aep6g wrote: Your fun_to_dlg fails when the function has parameters. Hah ok. std.functional.toDelegate() does work in its place though. As far as I see, it would be possible make the conversion would work by changing how a delegate's context is

Generalizing over function pointers and delegates

2019-02-15 Thread Bastiaan Veelo via Digitalmars-d-learn
Given a function taking a delegate, for example ``` int fun(int delegate() dg) {return dg();} ``` Sometimes we need to call `fun` with a pointer to a nested function and other times with a pointer to a top level function. As function pointers do not implicitly convert to delegates, this does

Re: Generalizing over function pointers and delegates

2019-02-15 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 15 February 2019 at 14:30:45 UTC, Alex wrote: There is https://dlang.org/library/std/functional/to_delegate.html Ah, there it is :-) Thanks. A templated function also works. ``` int genfun(F)(F dg) {return dg();} ​ int top_level() {return -1;} ​ void main() { int nested()

Re: Generalizing over function pointers and delegates

2019-02-15 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 15 February 2019 at 17:28:45 UTC, H. S. Teoh wrote: On Fri, Feb 15, 2019 at 05:40:39PM +0100, ag0aep6g via Digitalmars-d-learn wrote: Your fun_to_dlg fails when the function has parameters. Yes. Delegates are basically syntactic sugar for a function pointer with an implicit first

Re: 1 - 17 ms, 553 ╬╝s, and 1 hnsec

2019-05-17 Thread Bastiaan Veelo via Digitalmars-d-learn
On Friday, 17 May 2019 at 18:36:00 UTC, ag0aep6g wrote: I'd suggest "17 ms, and 553.1µs" for a better default (1 hns is 0.1 µs, right?). No weird "hnsecs", no false precision, still all the data that is there. I was going to propose the same. Hns is weird. Bastiaan.

Re: CTFE in imported static initializers

2019-05-14 Thread Bastiaan Veelo via Digitalmars-d-learn
On Monday, 13 May 2019 at 20:39:57 UTC, Steven Schveighoffer wrote: Why? I can't even use it at compile time... pragma(msg, moddata.length); Is that a good test or "usable at compile time", though? Isn't pragma(msg) done at an earlier stage than CTFE? I think that was the argument for

Re: Windows / redirect STDERR to see assert messages

2019-05-14 Thread Bastiaan Veelo via Digitalmars-d-learn
On Sunday, 12 May 2019 at 13:39:15 UTC, Robert M. Münch wrote: When developing Windows GUI applications I use: // detach from console and attach to a new one, works for x86 and x86_64 FreeConsole(); AllocConsole(); freopen("CONIN$", "r", stdin); freopen("CONOUT$",

Re: Compile time mapping

2019-05-12 Thread Bastiaan Veelo via Digitalmars-d-learn
On Saturday, 11 May 2019 at 15:48:44 UTC, Bogdan wrote: What would be the most straight-forward way of mapping the members of an enum to the members of another enum (one-to-one mapping) at compile time? If I understand your question correctly, you have two enums of equal length, and you want

Re: Compile time mapping

2019-05-12 Thread Bastiaan Veelo via Digitalmars-d-learn
On Sunday, 12 May 2019 at 17:53:56 UTC, Bastiaan Veelo wrote: On Saturday, 11 May 2019 at 15:48:44 UTC, Bogdan wrote: What would be the most straight-forward way of mapping the members of an enum to the members of another enum (one-to-one mapping) at compile time? If I understand your

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