On Saturday, 11 November 2017 at 15:48:59 UTC, Mike Parker wrote:
auto s = "hello";
auto bytes = s.representation;
https://dlang.org/phobos/std_string.html#.representation
Thank you for the replay.
Now I know.
aki
Hello,
This will be trivial question but I cannot figure out
what's wrong. I want to convert string to an array of ubyte.
import std.conv;
void main() {
auto s = "hello";
ubyte[] b = to!(ubyte[])(s);
}
It compiles but cause run time error:
std.conv.ConvException@C:\APP\D\dmd2\w
On Thursday, 25 May 2017 at 01:34:35 UTC, Adam D. Ruppe wrote:
align(1) struct NAME {
align(1):
members
}
My problem is resolved. Thank you for the quick reply.
Thanks,
Aki
Hi,
This is a code ported from some windows C program.
It is the Windows WAVE file header definition.
The field layout is the same with C,
but it has extra 2 bytes at the end,
sizeof(WAVEHEADER) in C is 46 while WAVEHEADER.sizeof in D is 48.
Why it still have padding in spite of "align(1)" ?
How
On Thursday, 5 May 2016 at 11:35:09 UTC, Jonathan M Davis wrote:
If you want a different mutability, then use the more general
function std.utf.toUTFz. e.g. from the documentation:
auto p1 = toUTFz!(char*)("hello world");
auto p2 = toUTFz!(const(char)*)("hello world");
auto p3 = toU
Hello,
When I need to call C function, often need to
have char* pointer from string.
"Interfacing to C++" page:
https://dlang.org/spec/cpp_interface.html
have following example.
extern (C) int strcmp(char* string1, char* string2);
import std.string;
int myDfunction(char[] s)
{
return strcmp
On Tuesday, 29 March 2016 at 01:04:50 UTC, Mike Parker wrote:
On Monday, 28 March 2016 at 14:40:40 UTC, Adam D. Ruppe wrote:
On Monday, 28 March 2016 at 04:53:19 UTC, aki wrote:
So... You mean there are no way to declare functions
without exporting the symbol?
alas, no, even if it is private
On Monday, 28 March 2016 at 14:40:40 UTC, Adam D. Ruppe wrote:
On Monday, 28 March 2016 at 04:53:19 UTC, aki wrote:
So... You mean there are no way to declare functions
without exporting the symbol?
alas, no, even if it is private it can conflict on the outside
(so stupid btw).
Is it all th
On Monday, 28 March 2016 at 04:33:06 UTC, Rikki Cattermole wrote:
You have two choices. Change the name in code (so manual
mangling) or use pragma(mangle, ...) to change it instead.
So... You mean there are no way to declare functions
without exporting the symbol?
There are so many instances to
On Monday, 28 March 2016 at 04:12:56 UTC, Rikki Cattermole wrote:
Do you need it to use extern(C)?
Because if you don't, just drop that. D's mangling will fix it.
Yes, I do need extern(C) for some reason like:
alias Hook = extern(C) void function();
void sethook(Hook func) {
...
}
... setho
Hello,
When I porting legacy app. written in C to D,
I have a problem.
file a.d:
extern (C) private void foo() {}
file b.d:
extern (C) private void foo() {}
Error 1: Previous Definition Different : _foo
In C language, "static void foo(){}" does not
export the symbol out side the compilation
On Friday, 4 March 2016 at 16:46:35 UTC, Steven Schveighoffer
wrote:
You cannot add or remove keys. You can modify values for
existing keys.
Note, in your code, this would not cause a problem, since
setting hash to null just removes the reference from the local
variable 'hash', it does not
Is it okay to modify associative array while iterating it?
import std.stdio;
void main() {
string[string] hash = [ "k1":"v1", "k2":"v2" ];
auto r = hash.byKeyValue();
while(!r.empty) {
auto key = r.front.key;
auto value = r.front.value;
Thank you, Jonathan. Now I understand.
On Monday, 4 January 2016 at 17:34:47 UTC, Kapps wrote:
union
{
ubyte[size] store;
// conservatively mark the region as pointers
static if (size >= (void*).sizeof)
void*[size / (void*).sizeof] p;
}
Interesting to know the way to make G
Following function will return the reference to a object Foo
embedded in a Variant.
class Foo {}
Variant fun() {
Variant v;
v = new Foo();
return v;
}
According to the source code of VariantN.opAssign,
the assignment is done by:
memcpy(&store, &rhs, rhs.sizeof);
fptr =
On Friday, 17 July 2015 at 14:14:41 UTC, byron wrote:
Since I have yet to use or see anyone use shared in a useful
way I avoid it.
It's one way to avoid it. So, you mean you always use send/receive
when you need threading?
I did small test to know the memory layout.
import core.atomic;
int foo
On Thursday, 16 July 2015 at 09:17:47 UTC, Daniel Kozák wrote:
class DerivedThread : Thread {
shared int count = 0;
}
I thought shared is only for whole of the object.
auto thr = new DerivedThread();
Here, "thr" is not shared but it's member thr.count is shared?
But if it's not shared,
On Thursday, 16 July 2015 at 08:21:26 UTC, maarten van damme
wrote:
Have you checked out std.parallelism and std.concurrency?
I know std.concurrency to use spawn. If I cannot use Thread,
I'll implement by spawn. But want to try Thread class because
it seems similar to Java's Thread class.
I don
On Thursday, 16 July 2015 at 07:36:39 UTC, Jonathan M Davis wrote:
Yes. Every thread gets a copy of the non-shared static
variables, and all of the non-shared static constructors get
run for each thread.
- Jonathan M Davis
Thank you for reply. Now i know.
I did some test using C++ as you sai
I can't resolve the compile errors:
import core.thread;
class DerivedThread : Thread {
int count = 0;
this() {
super(&run);
}
private void run() {
inc(); //testThread.d(8): Error: shared method
testThread.DerivedThread.inc is not callable using a
I noticed just making many threads cause an error.
Are there any limit for the number of threads?
import std.concurrency;
import core.thread;
void fun() { Thread.sleep(5000.msecs); }
void testThread() {
foreach(i; 0..2000) {
spawn(&fun);
}
}
core.thread.ThreadErro
I want to make sure about the semantics of unshared variables.
import std.concurrency;
import core.thread;
ubyte[1024 * 1024] buf1MB;
void fun() { Thread.sleep(5000.msecs); }
void testThread() {
foreach(i; 0..2000) {
spawn(&fun);
}
}
Are instances of buf1MB create
On Tuesday, 14 July 2015 at 11:44:34 UTC, Steven Schveighoffer
wrote:
static Rebindable!(immutable(Foo))[string] map
-Steve
It all works. And I learned something from
the source code of Rebindable.
Thank you.
Aki.
On Tuesday, 14 July 2015 at 10:46:42 UTC, Andrea Fontana wrote:
Trying on http://dpaste.dzfl.pl/ I don't see that error.
Maybe you mean "const" and not "immutable" ?
Andrea
I used:
DMD32 D Compiler v2.067.1 on Windows8
I believe there are no typo because it is copy-pasted.
I noticed I can use
I like to create immutable object
which is identified by name as it's key.
And also need get() to look up named object
which is already created.
class Foo {
static immutable(Foo)[string] map;
string name;
// and other attributes here...
this(string name) immutable
On Thursday, 2 July 2015 at 17:21:03 UTC, Kapps wrote:
An ugly solution, but the approach used in Phobos is to create
something like a_init.d which a.d imports, provided that the
static ctors don't actually rely on things from the static ctor
of b.
How about this idea?
Allowing to define sub
On Wednesday, 1 July 2015 at 22:25:48 UTC, Jonathan M Davis wrote:
On Wednesday, July 01, 2015 08:52:38 Steven Schveighoffer via
Digitalmars-d-learn wrote:
The runtime cannot introspect the code to detect the circular
dependency, so it makes a conservative decision. I'm waiting
on an introducti
Following code causes run-time error.
How can I use static this() without causing error?
It's difficult to avoid this situation because
actual code is more complex.
file main.d:
void main() {
}
file a.d:
import b;
class A {
static this() {}
};
file b.d:
import a;
class B {
stati
On Tuesday, 30 June 2015 at 19:36:24 UTC, Jacob Carlborg wrote:
On 30/06/15 16:19, aki wrote:
Please suggest me if anyone have an idea.
You can use TypeInfo.getHash [1] to get the hash of a given
value. Something like:
string a = "foo";
typeid(a).getHash(&a)
[1] http://dlang.org/phobos/ob
I would like to know proper way to calculate
hash for given member fields.
class Foo {
int value;
string str;
override nothrow @safe size_t toHash() {
// calculate hash based on field value.
// value and str in this example.
}
}
boo
On Sunday, 28 June 2015 at 10:16:47 UTC, Marc Schütz wrote:
On Saturday, 27 June 2015 at 17:43:13 UTC, aki wrote:
But when I compile it by DMD 2.062 on Windows
it says:
testArray.d(5): Error: cannot infer argument types
(line 5 is at "foreach(i, v; a[]) {" )
2.062 is really ancient, we're abo
On Saturday, 27 June 2015 at 18:32:10 UTC, Ali Çehreli wrote:
On 06/27/2015 10:43 AM, aki wrote:
You are rightly assuming that the loop counter is available for
all container types. Unfortunately, it is the case only for
arrays.
Now I know. Thanks for it.
aki.
I want to print the contents of Array!int
import std.stdio;
import std.container;
void pr(Array!int a) {
foreach(i, v; a[]) {
writeln("%4s: %s\n", i, v);
}
}
But when I compile it by DMD 2.062 on Windows
it says:
testArray.d(5): Error: cannot infer argument type
33 matches
Mail list logo
