Unexpected auto-concatenation of string elements:
string[] arr = ["a", "b" "c"];// ["a", "bc"], length==2
int[] arr2 = [[1], [2] [3]];// Error: array index 3 is out
of bounds [2][0 .. 1]
// Error: array index 3 is out
of bounds [0..1]
dmd 2.071.2-b2
On Friday, 23 September 2016 at 09:21:56 UTC, Claude wrote:
...
// Maybe you can try using std.variant?
import std.variant;
alias Component = Variant;
class Entity
{
void register (Component v) { components ~= v; }
void unregister (T) () {
foreach (i, c; components) if (c.type
On Thursday, 15 September 2016 at 14:42:13 UTC, Jonathan M Davis
wrote:
On Thursday, September 15, 2016 14:07:18 deed via
Digitalmars-d-learn wrote:
On Thursday, 15 September 2016 at 13:57:13 UTC, rikki
cattermole
wrote:
> Not a bug, it is never used.
I'd expect an "Error:
On Thursday, 15 September 2016 at 13:57:13 UTC, rikki cattermole
wrote:
Not a bug, it is never used.
I'd expect an "Error: ... no effect ..." from the compiler.
void main ()
{
new int[](1);
}
Compiles with dmd 2.071.2-b2, but no code is generated for `new
int[](1);`.
Caused a bug due to:
char[] arr;
got updated to
char[] arr; new char[](SIZE);
If it's considered a bug and someone would file it, I'd be
thankful.
On Monday, 9 May 2016 at 22:33:37 UTC, John Colvin wrote:
There are lots of ways to approach this. Here's one possibility:
auto cars(Bar bar)
{
static struct Res
{
Bar bar;
Car opIndex(size_t i)
{
return /* e.g. getCar(bar, i); */
}
}
r
struct Foo {
Bars bars;
...
}
struct Foos {
Foo[] arr;
Foo opIndex (size_t idx) { return arr[idx]; }
...
}
struct Bar {
// No Car[] cars;
...
}
struct Bars {
Bar[] arr;
Bar opIndex (size_t idx) { return arr[idx]; }
...
}
struct Car {
...
}
Foos foos
On Friday, 22 April 2016 at 01:42:11 UTC, Yuxuan Shui wrote:
Maybe use something like:
auto a = () => instanceA.verboseFieldA.verboseFieldB;
You can certainly declare temporaries and rely on the compiler
optimizing those away:
auto a = instanceA.verboseFieldA.verboseFieldB;
auto b = instanc
Often I find myself wanting to alias an expression, such as
verbose fields, possibly nested. AFAIK, the with statement makes
it easier, but not as good as it could have been. What I'd like
to express is for example something like this:
with( a = instanceA.verboseFieldA.verboseFieldB,
b
On Sunday, 10 April 2016 at 16:19:51 UTC, Lucien wrote:
Hello,
Is there the possibility to set the cursor position in a file ?
Example:
void main()
{
File myFile = File("myFile.txt");
showFile(myFile);
// set cursor pos to 0
showFile(myFile);
}
void showFile(Fil
On Monday, 12 October 2015 at 15:39:15 UTC, TheFlyingFiddle wrote:
How does this compile?
{
string str = "hello";
foreach (n; [32, 119, 111, 114, 108, 100, 33]) str ~= n;
import std.stdio : writeln;
str.writeln;// prints "hello world!"
writeln(true == 1); /
On Monday, 14 September 2015 at 18:36:54 UTC, Meta wrote:
As an aside, you should use `sort()` instead of the
parentheses-less `sort`. The reason for this is that doing
`arr.sort` invokes the old builtin array sorting which is
terribly slow, whereas `import std.algorithm; arr.sort()` uses
the
On Sunday, 13 September 2015 at 03:20:31 UTC, deed wrote:
...
and since `string` is an alias for `const(char)[]`, it's not ...
string is an alias for immutable(char)[], not const(char)[].
http://dlang.org/arrays.html#strings
Sorry about the noise.
On Sunday, 13 September 2015 at 03:20:31 UTC, deed wrote:
string s = "Some text";
s.retro.find("e"); // `Some te` (Surprising to me.
Error? 2.067.1)
Sorry, the above is wrong, .retro.find does indeed return what's
expected.
string s = "Some te
On Saturday, 12 September 2015 at 12:51:04 UTC, Namal wrote:
Anyway, there is no .reverse for strings I guess, what is the
way to completely reverse a string in D?
What do you want to do? Do you want to keep your data in original
order, but get a reversed view of it for something, or do you
a
On Saturday, 12 September 2015 at 10:17:19 UTC, Nordlöw wrote:
How do I most elegantly iterate all the adjacent pairs in an
`InputRange` using Phobos?
Something like
[1,2,3,4] => [(1,2), (2,3), (3,4)]
Why not just:
zip(arr[0 .. $-1], arr[1 .. $])
?
On Friday, 11 September 2015 at 10:41:16 UTC, ixid wrote:
Does sort have to be eager or would it be possible to have a
lazy version? It's messy to always have to use array and leap
in and out of lazy operations within a UFCS chain. Surely as
many functions as possible should be optionally lazy.
On Wednesday, 9 September 2015 at 20:28:35 UTC, Laeeth Isharc
wrote:
I have a DateTime[][] arg ...
I would like to find the intersection of the dates.
A suggestion:
auto minLength = arg.map!(a => a.length).reduce!min;
auto minIdx = arg.map!(a =>
a.length).countUntil(minLength);
a
On Wednesday, 9 September 2015 at 11:30:26 UTC, Bahman Movaqar
wrote:
On Wednesday, 9 September 2015 at 08:29:20 UTC, cym13 wrote:
The way I would have written it is:
auto result = foobars.filter!(fb => nums.all!(n => (fb.x *
fb.y) > n))
.filter!(fb => nums.all!(n => fb.x
On Sunday, 6 September 2015 at 22:04:55 UTC, Namal wrote:
oh, sorry. But I found out what I have been doing wrong besides
that.
arr.sort.uniq;
uniq(arr) or arr.sort.uniq; compiles but doesn't store it in
the arr array, I need to store it in a new one.
Right, it's like
int x = 3;
// x + 5;
On Monday, 7 September 2015 at 10:25:09 UTC, deed wrote:
writeln(x);// or you can pass it to a function.
I meant `writeln(x + 5)`
On Sunday, 6 September 2015 at 17:57:49 UTC, Namal wrote:
Yeah, I just checked, it is 2.066, how can I install the new
version on ubuntu with sudo apt-get?
sudo apt-get install dmd
will give you dmd v2.067.1. Don't know when it will be upgraded
to 2.068 though.
On Saturday, 5 September 2015 at 17:31:39 UTC, Namal wrote:
Yeah, I have have been trying this example from wiki books
https://en.wikibooks.org/wiki/Learning_D_With_Project_Euler
It is not even compiling.
What exactly is not compiling?
On Saturday, 5 September 2015 at 14:44:19 UTC, deed wrote:
.map!(s => chomp(s, "\"")
.map!(s => chompPrefix(s, "\"")
should be
.map!(s => chomp(s, "\""))
.map!(s => chompPrefix(s, "\""))
On Saturday, 5 September 2015 at 12:41:37 UTC, Namal wrote:
Thx guys. Now I try out the split function. I read the file as
a single string?
auto arr = split(cast(string)read(filename),",");
where the file has "A", "B", "C"
and I get the output ["\"A\"", " \"B\"", " \"C\"\n"]
I can understand
On Friday, 4 September 2015 at 07:27:54 UTC, Namal wrote:
On Friday, 4 September 2015 at 01:55:13 UTC, deed wrote:
On Friday, 4 September 2015 at 01:31:28 UTC, Namal wrote:
How can I get just the maximum element? Do I need to give a
range for it?
Use max?
http://dlang.org/phobos
On Friday, 4 September 2015 at 01:31:28 UTC, Namal wrote:
How can I get just the maximum element? Do I need to give a
range for it?
Use max? http://dlang.org/phobos/std_algorithm_comparison.html#max
static if (is(typeof(T) == int))
should be
static if (is(T == int))
T is already a type.
Ahh. Thanks!
struct Internal { int i; double d; string s; }
struct External_int {
Internal internal;
@property Internal* ptr () { return &internal; }
this (int a)
{
internal.s = "int";
internal.i = a;
}
}
struct External (T) {
Internal internal;
@property Internal* ptr () { ret
Your link is failing because the .init value of the struct is
not found. The .init will be in the object file corresponding
to the module where the struct is defined, so to fix the linker
error, add the win32.oaidl module to the list of modules you're
compiling and linking. An easy way to do th
// bindings from
https://github.com/CS-svnmirror/dsource-bindings-win32/blob/308739a417eaaba85a5d3ce7741fd43d3042efe0/oaidl.d
---
import win32.oaidl;
// The following gives linker error: error LNK2019: unresolved
external
// symbol _D5win325oaidl7VARIANT6__initZ referenced
// in function ...
OK, I tried with OSX 64-bit compiler. Perhaps 32 bit would not
fare as well. What platform are you testing on?
Have tried Linux and Windows 64-bit and it seems to be an issue
when compiled with -m32. Tests are provided here
http://dpaste.dzfl.pl/5f55f4152aa8.
I agree that one cannot compare
On Thursday, 23 October 2014 at 21:42:46 UTC, anonymous wrote:
On Thursday, 23 October 2014 at 21:17:25 UTC, deed wrote:
Some testing can be found on http://dpaste.dzfl.pl/5f55f4152aa8
for both Windows and Linux. This just illustrates the sin
function.
I think the tests marked "[1]
Some testing can be found on http://dpaste.dzfl.pl/5f55f4152aa8
for both Windows and Linux. This just illustrates the sin
function.
Replacing double with real makes everything pass on Linux Mint 16
with -m32 and -m64. Replacing double with float seems to give the
same problems as before, but
A similar problem was recently (about 2-3 weeks ago IIRC) seen
in one of
the Phobos PR's. It appears to be related to the autoextension
of float
to double (or double to real, I forget which) in certain
contexts on
Windows. @deed Could you please try to reduce the failing test
to a
mi
On Thursday, 23 October 2014 at 18:26:53 UTC, Steven
Schveighoffer wrote:
On 10/23/14 2:18 PM, deed wrote:
Using equality is not a good idea with floating point.
The compiler will on a whim, or depending on whether it can
inline or
not, use higher precision floats, changing the outcome
Using equality is not a good idea with floating point.
The compiler will on a whim, or depending on whether it can
inline or not, use higher precision floats, changing the
outcome slightly.
I cannot say for certain whether this explains all the issues
you have, the very last one seems troubl
assert (fasin(a) != fasin(a)); // ?
assert (facos(a) != facos(a)); // ?
Too quick there.. But:
assert (fasin(0.5) != fasin(0.5)); // ?
assert (facos(0.5) != facos(0.5)); // ?
--
Why bother?
import std.algorithm : max;
F fun (F a, F b) { return max(a,b) + 1.; }
unittest { assert (gun(1, 2) == gun(2, 1)); } // Passes
F pun (F a, F b) { return sin(max(a,b)); }
unittest { assert (fun(1, 2) == fun(2, 1)); } // Fails
// Fun, gun, pun...
unittest { assert (fun(1, 2) =
// DMD v2.066.0
// All asserts pass (!)
import std.math : sin, cos, tan, asin, acos, atan,
sinh, cosh, tanh, asinh, acosh, atanh;
alias F = double;
immutable F a = 3, b = 5;
F fmul (F a) pure { return a * b; }
F fsin (F a) pure { return sin(a); }
struct Smul { F value; this
Hi!
struct Vector (T)
{
T[]arr;
T[] opSlice() { return arr; }
}
Vector!double v;
double[] d;
v[][] = d[] + d[];
//first [] call opSlise, second [] for array syntax
Best Regards,
Ilya
Thanks for your suggestion. It's not as attractive though, it
would be the same as v.arr[] =
struct Vector (T)
{
T[]arr;
void opSliceAssign (T[] a) { arr[] = a[]; }
}
unittest
{
auto v = Vector!double([1, 2]);
double[] d1 = [11, 12];
double[] d2 = [21, 22];
double[] d3 = new double[](2);
d3[] = d1[] + d2[];
assert (d3 == [11.+21., 12.+22.]);
assert (is(typeof(d1[] + d2[]
On Saturday, 1 February 2014 at 22:59:12 UTC, bearophile wrote:
deed:
auto lines = File(filename).byLine.array;
writeln(lines); // Crap
---
Beside the answers that others have already given you, another
way to do that is to read the whole file (with read or
readText) and then use
On Saturday, 1 February 2014 at 22:52:24 UTC, Andrej Mitrovic
wrote:
On Saturday, 1 February 2014 at 22:47:54 UTC, deed wrote:
Docs say:
- std.stdio.byLine returns an input range
- std.array.array takes an input range
Docs also say:
/**
Note:
Each $(D front) will not persist after $(D
---
import std.stdio;
import std.array;
auto lines = File(filename).byLine.array;
writeln(lines); // Crap
---
dmd 2.064(.2 I think)
Docs say:
- std.stdio.byLine returns an input range
- std.array.array takes an input range
On Saturday, 9 November 2013 at 16:08:15 UTC, evilrat wrote:
On Saturday, 9 November 2013 at 15:59:02 UTC, deed wrote:
No, it doesn't work. Do I have to compile my own runtime
library and pass it on the command line? (Have just grabbed
the 3.064.2.zip file and not run any installer.)
On Saturday, 9 November 2013 at 15:56:12 UTC, deed wrote:
On Saturday, 9 November 2013 at 15:49:40 UTC, evilrat wrote:
On Saturday, 9 November 2013 at 15:30:55 UTC, deed wrote:
core.runtime's import path is specified in the sc.ini file,
in DFLAGS
If I specify the core.runtime file in the
On Saturday, 9 November 2013 at 15:49:40 UTC, evilrat wrote:
On Saturday, 9 November 2013 at 15:30:55 UTC, deed wrote:
core.runtime's import path is specified in the sc.ini file, in
DFLAGS
If I specify the core.runtime file in the build file
everything works
Why is it so?
in short
sc.ini
[Environment]
DFLAGS="-I%@P%\..\..\src\phobos"
"-I%@P%\..\..\src\druntime\import"
VCINSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio
10.0\VC
WindowsSdkDir=C:\Program Files\Microsoft SDKs\Windows\v7.1
LIB="%@P%\..\lib"
[Environment32]
LIB="%@P%\..\lib"
LINKC
Simple example:
struct Circle {
double radius;
this(double radius) { this.radius = radius; }
this(double diameter) { this.radius = diameter / 2; }
}
void main() {
auto c1 = Circle(radius = 1.0);
auto c2 = Circle(diameter = 2.0);
assert(c1.radius == c2.radius);
}
auto o = getO("info3");
if (cast(Container)o != null) { ... }
Thanks Simen.
(Compiler requires !is instead of !=)
class A { ... }
class NonContainer : A { ... }
class Container : A { A[] container; }
class NC1 : NonContainer {}
...
class C1 : Container {}
...
A getO(string info)
{
switch (info)
{
default : return new NonContainer();
case "info1": return new
/* SNIP */
int var() @property
{
return var;
}
Isn't the problem in this property function? (Shouldn't it
return _var :o)
that's also an error. changing to _var gives same result though..
The following compiles and crashes with DMD 2.063.
Should this be a compile time error?
class A
{
int _var;
void var(int i) @property
{
this.var = i; // oops, crashes.
} // should have been this._var
int var() @property
{
return var;
bug submitted:
http://d.puremagic.com/issues/show_bug.cgi?id=9969
Thanks for reporting.
By the way, I was compiling for Windows and had only compile time
errors.
Made available on dpaste:
http://dpaste.dzfl.pl/7b5c36f8
On dpaste, the struct with an int didn't compile. (Same error
message)
It turns out that
Template!(2, Sint).statArr()[0].writeln();
compiles with
$ dmd test.d -m64
but not with
$ dmd test.d
import std.stdio : writeln;
template Template (uint n, T)
{
T[n] statArr()
{
T[n] arr;
return arr;
}
T[] dynArr()
{
T[] dynArr = new T[n];
return dynArr;
}
}
void main()
{
alias statArr9 = Template!(9, int).statArr;
alias statArr3
import std.algorithm, std.array, std.range;
void main() {
int[] data = [2, 0, 1];
auto mapped = data.map!q{a * 10};
alias R = typeof(mapped);
pragma(msg, hasSwappableElements!R);
pragma(msg, hasAssignableElements!R);
pragma(msg, isRandomAccessRange!R);
pragma(msg, ha
Why randomAccessRange.array() before calling sort?
The std.algorithm.sort doc says: "Sorts a random-access range ..."
import std.algorithm, std.array;
long[] source = [2, 0, 1];
auto mapped = source.map!("a * 10");
assert (isRandomAccessRange!(typeof(mapped))); // Passes.
Implies possibilit
as there is no randomness involved, only the possibility to
access by index.
D code DLLs called by D code are heavly broken. Don't expect it
to work.
Any solid workarounds?
I'm running into several issues, so first, is this supposed to
work correctly? I'm looking into D code DLLs called by D code.
Input regaridng DWT with phobos is welcome. See posting here:
http://forum.dlang.org/thread/otyfilaasbxrwnqvr...@forum.dlang.org
dmd should output coff when compiling with -m64
You are right, no need for conversion. Coff is output.
Anyone having a correct sc.ini file they could post?
Mine looks like this:
[Version]
version=7.51 Build 020
[Environment]
LIB="%@P%\..\lib"
DFLAGS="-I%@P%\..\phobos" "-I%@P%\..\druntime\
Do I need another linker?
Ach, Windows.
Yeah, you need VS Linker when compiling for 64bits on Windows.
Can't help you more with this. I think there is somewhere
step-by-step guide for 64bits+windows. (wiki.dlang.org maybe?
not sure)
Thanks for your help!
The solution that worked out for me
Missing -m64 or something?
Probably. I am on Windows using dmd 2.061 and optlink 8.00.12
dmd main.d -m64
Con't run 'bin\amd64\link.exe', check PATH
Setting LINKCMD64 to the same path as for LINKCMD in sc.ini:
dmd main.d -m64
OPTLINK : Warning 9: Unknown Option : MERGE
OPTLINK : Error 8: Illeg
void main()
{
asm
{
movRAX, 3;
}
}
results in:
Error: undefined identifier 'RAX'
AX and EAX work.
Anything missing or isn't it yet implemented?
.d.obj:
$(DC) $(DFLAGS) -c $<
Ali
from http://digitalmars.com/ctg/make.html:
Implicit Definition lines
.targ_ext.dep_ext : [; rule] [# ... ]
Isn't targ_ext .obj and dep_ext .d?
If so, either the example or the documentation seems incorrect.
The example provided works. The .obj is update
.d.obj:
$(DC) $(DFLAGS) -c $<
Ali
Works like a charm! Case solved.
Thank you very much!
don't know what make you're using, [...]
I'am using the make.exe coming with the DMD 2.061 distro in
D/dmd2/windows/bin/
Thought/hoped the GNU spec was applicable, but if it works with
GNU make and not Digital Mars make, well..
make -man leads to http://digitalmars.com/ctg/make.html, which
Assuming that this is for GNU make, ensuring that the rule
starts with a tab characters, that file works with GNU Make
3.81.
Ali
It is Digital Mars Make Version 5.06 and it's on Windows 7.
On Wednesday, 9 January 2013 at 17:57:28 UTC, Ali Çehreli wrote:
On 01/09/2013 09:51 AM, deed wrote:
$(DC) $< $(DCFLAGS)
Your post has spaces at the beginning on that line.
(Thunderbird removes those when I reply. Curse!)
Target rules must start with a tab character.
Ali
Yeah, tha
Yeah, that's not the problem. Replacing %.obj and %.d with
main.obj and main.d works.
And $< with main.d
# makefile ---
OBJS= main.obj othermodule.obj
DC = dmd
DCFLAGS = -c
all : $(OBJS)
%.obj : %.d
$(DC) $< $(DCFLAGS)
#
Error on line 9: expecting target : dependencies
* main.d, othermodule.d and makefile are in the same folder.
* make is executed in
Thanks for your replies. How about this:
interface I {}
interface I1 : I
{
void setx(int x);
int getx();
int getSum();
}
interface I2 : I
{
void sety(int y);
int gety();
int getSum();
}
class Impl : I1, I2
{
int x, y;
void setx(int x) { this.x = x; }
in
interface I
{
void setX(int x);
int getX();
}
class C : I
{
int x, y;
void setX(int x) { this.x = x; }
int getX() { return x; }
void setY(int y) { this.y = y }
int getY() { return y; }
}
void main()
{
auto obj = new C; // Want new C to instantia
What I know about this topic is in the following chapter:
http://ddili.org/ders/d.en/object.html
Ali
Thanks, Ali. That clarifies why it worked with opCmp and not with
opEquals.
interface I
{
bool opEquals(I i);
}
class C : I
{
bool opEquals(I i)
{
return true;
}
}
void main()
{
I i1 = new C;
I i2 = new C;
assert(i1 == i2); // Assertino failure
assert(i1 != i2); // Passes, although it's the opposite of
what I want..
}
What's
interface I
{
// ...
bool opEquals(I i);
}
class C : I
{
// ...
bool opEquals(I i)
{
return true;
}
}
void main()
{
I i1 = new C;
I i2 = new C;
assert(i1 == i2); // Assertion failure
assert(i1 != i2); // Passes, although it's the opposite of
what
On Monday, 3 December 2012 at 23:42:38 UTC, bearophile wrote:
deed:
How is a playing card's rank represented most elegantly in
code?
Maybe with an enum?
enum Card { J, Q, ...}
If you have to store many of them then maybe giving them a size
of one byte is better:
enum Card : ubyte
How is a playing card's rank represented most elegantly in code?
* Should be a customized uint/an own type representing uints in
the range of 2 through 14.
* void foo(Rank rank) { } // Accepts only the valid range
foo(0); // Error
foo(2); // Ok
foo(10); // Ok
alias J 11;
alias Q 1
Struct pointers are useful and reliable, but before using them
you need to know the difference between heap and stack, what a
stack frame is, and how structs are handled when they are on
the stack. Learning the basics of such things ideas requires
only few minutes and it will be useful for many
On Tuesday, 9 October 2012 at 16:21:47 UTC, bearophile wrote:
deed:
// Again, why are the three last adresses the same?
The D language and its compiler is acting correctly here, so
the output you see is correct. All those structs are allocated
on the stack. The first three Test are
import std.stdio;
struct Test
{
static Test[] objects;
static Test*[] psObject;
static int[] ints;
static int*[] psInt;
int a;
int b;
int* pa;
this(int a)
{
this.a = a;
this.pa = &this.a;
this.b = 2 * a;
Anyone having experience in using WIC? How can I render, let's
say a png file on disk, to the screen?
Thanks to all of you for your informative replies. I was testing
different code structures and wondered whether this was possible.
Hi
I am trying to register a class member function as
wc.lpfnWndProc, but get the error message "cannot implicitly
convert expression (&this.WndProc) of type extern (Windows) int
delegate(...) to extern (Windows) int function(...).
I have:
extern (Windows)
class App
{
HRESULT initialize
Exactly. I couldn't remember seeing this error before.
But why is the wndProc function nothrow?
Why do I have to mark it with nothrow?
I did, but then I am not able to use writeln for debugging.
Is this restriction something new?
I get this error from a minimal windows example:
import core.runtime;
import std.c.windows.windows;
import std.string;
pragma(lib, "gdi32.lib");
extern (Windows)
{
int WinMain( ... ) { ... }
HRESULT appMain( ... ) {
...
WNDCLASS wc;
...
wc.lpfnWndProc = &wndProc;
...
}
HRESU
Reinstallation solved the case. Thanks for your prompt reply.
You druntime installation is bad due to some cruft left from a
previous
install (the installer obviously needs some work). If you used
an installer,
then uninstall dmd, make sure that it's completely removed, and
then reinstall
it.
If you installed it manually, then make sure that you blow awa
On Friday, 31 August 2012 at 22:44:11 UTC, ixid wrote:
You're missing the semi-colon after import std.random.
Sorry, typo. Semicolon is included in the file. DMD 2.060.
import std.random
void main() {}
---
results in:
Error 42: Symbol Undefined
_D4core6memory2GC6qallocFkkZS4core6memory8BLkInfo_
Error 42: Symbol Undefined _D4core6memory2GC6extendFPvkkZk
Error 42: Symbol Undefined _D4core5bitop3bsrFNaNbkZi
--- errorlevel 3
What is wrong?
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