On Monday, 16 August 2021 at 05:36:07 UTC, Tejas wrote:
That is why I was using heapAllocate, because using `new` on
scope allocates exception on stack, and if you exit, then the
exception is basically freed before it even gets caught. It
fails even when you catch within the same function.
On Sunday, 15 August 2021 at 20:23:03 UTC, Paul Backus wrote:
On Sunday, 15 August 2021 at 18:47:27 UTC, Tejas wrote:
Do you see anything wrong with the following
`emplace`-allocated, RAII following exceptions:
[...]
Is this good enough for general use now? Any other drawbacks?
It only
On Sunday, 15 August 2021 at 20:41:51 UTC, james.p.leblanc wrote:
Greetings,
I have been trying to get a working example of slice assignment
operator
overloading ... and am befuddled. From the spec (section
20.6.2), the
code below appears:
struct A
{
int opIndexAssign(int
On Monday, 16 August 2021 at 02:26:04 UTC, Tejas wrote:
Agh >_<
if I remove the `scope`and replace it with `auto`?
No longer having anything to do with the stack or RAII, just
using malloc + emplace instead of GC?
Yeah it might leak memory unless the catch block explicitly
frees the
On Sunday, 15 August 2021 at 20:23:03 UTC, Paul Backus wrote:
On Sunday, 15 August 2021 at 18:47:27 UTC, Tejas wrote:
Do you see anything wrong with the following
`emplace`-allocated, RAII following exceptions:
[...]
Is this good enough for general use now? Any other drawbacks?
It only
On Sunday, 15 August 2021 at 07:10:17 UTC, JG wrote:
Hi,
This is exactly the behaviour I was trying to obtain.
It however comes with a fair amount of overhead, as can be seen
in the following llvm ir:
[...]
What you are asking for are reference variables. C++ has them:
the example here
On Sunday, 15 August 2021 at 21:28:53 UTC, james.p.leblanc wrote:
On Sunday, 15 August 2021 at 21:15:02 UTC, Bastiaan Veelo wrote:
On Sunday, 15 August 2021 at 20:41:51 UTC, james.p.leblanc
— Bastiaan.
Bastiaan,
Thanks once again,
James
On Sunday, 15 August 2021 at 21:28:53 UTC,
On Sunday, 15 August 2021 at 21:15:02 UTC, Bastiaan Veelo wrote:
On Sunday, 15 August 2021 at 20:41:51 UTC, james.p.leblanc
— Bastiaan.
Bastiaan,
Thanks kindly for your response!
Unfortunately, I do not see what the program does. I mean A is a
structure
that has only functions. So, how
There is an example here:
http://www.rosettacode.org/wiki/Multi-dimensional_array#D
Look at the Matrix struct
On Sunday, 15 August 2021 at 20:41:51 UTC, james.p.leblanc wrote:
I have been trying to get a working example of slice assignment
operator
overloading ... and am befuddled. From the spec (section
20.6.2), the
code below appears:
struct A
{
int opIndexAssign(int v); //
On Sunday, 15 August 2021 at 20:41:51 UTC, james.p.leblanc wrote:
struct A
{
int opIndexAssign(int v); // overloads a[] = v
int opIndexAssign(int v, size_t[2] x); // overloads
a[i .. j] = v
int[2] opSlice(size_t x, size_t y); // overloads i
.. j
}
Greetings,
I have been trying to get a working example of slice assignment
operator
overloading ... and am befuddled. From the spec (section
20.6.2), the
code below appears:
struct A
{
int opIndexAssign(int v); // overloads a[] = v
int opIndexAssign(int v, size_t[2]
On Sunday, 15 August 2021 at 18:47:27 UTC, Tejas wrote:
Do you see anything wrong with the following
`emplace`-allocated, RAII following exceptions:
[...]
Is this good enough for general use now? Any other drawbacks?
It only works if you're throwing and catching in the same
function.
On Sunday, 15 August 2021 at 16:23:25 UTC, Ali Çehreli wrote:
On 8/15/21 2:10 AM, Alexandru Ermicioi wrote:
>> This may be useful in some cases but in general, these
colatteral
>> exceptions don't carry much information and I don't think
anybody
>> looks at them. Usually, the first one is the
On Saturday, 14 August 2021 at 23:09:14 UTC, Paul Backus wrote:
On Saturday, 14 August 2021 at 14:04:47 UTC, kdevel wrote:
~~~
char [7] d7 = "x"; // okay
string s = "x";
char [7] c7 = s; // throws RangeError
~~~
What justifies that the compiler behaves differently on two
terms ('s',
On Sunday, 15 August 2021 at 16:23:25 UTC, Ali Çehreli wrote:
That output contains two automatically chained exceptions:
Failed: Main failed
This failed too: The destructor failed
Ali
Hmm, wasn't aware of such use case (results of too much java :)).
Considering this case I'd say it is
On Sunday, 15 August 2021 at 16:49:22 UTC, Paul Backus wrote:
On Sunday, 15 August 2021 at 07:10:17 UTC, JG wrote:
Hi,
This is exactly the behaviour I was trying to obtain.
It however comes with a fair amount of overhead, as can be
seen in the following llvm ir:
[...]
I'm not really
On Sunday, 15 August 2021 at 07:10:17 UTC, JG wrote:
Hi,
This is exactly the behaviour I was trying to obtain.
It however comes with a fair amount of overhead, as can be seen
in the following llvm ir:
[...]
I'm not really familiar with llvm ir, but looking at it on
godbolt, it seems
On 8/15/21 2:10 AM, rempas wrote:
So when I'm doing something like the following: `string name = "John";`
Then what's the actual type of the literal `"John"`?
In the chapter [Calling C
functions](https://dlang.org/spec/interfaceToC.html#calling_c_functions)
in the "Interfacing with C" page,
On 8/15/21 2:10 AM, Alexandru Ermicioi wrote:
>> This may be useful in some cases but in general, these colatteral
>> exceptions don't carry much information and I don't think anybody
>> looks at them. Usually, the first one is the one that explains the
>> error case.
> That is just an
Lot's of great information and pointers already. I will try from another
angle. :)
On 8/14/21 11:10 PM, rempas wrote:
> So when I'm doing something like the following: `string name = "John";`
> Then what's the actual type of the literal `"John"`?
As you say and as the code shows, there are
On Sunday, 15 August 2021 at 10:12:17 UTC, Timofeyka wrote:
Thank you for your reply!
I wanted to link to my project another project without source
code.
This tutorial can help you create yours libs:
https://wiki.dlang.org/Win32_DLLs_in_D
On Sunday, 15 August 2021 at 09:49:39 UTC, Timofeyka wrote:
Hello!
I may have a very stupid question, but still.
How do I include a .lib library? How to use it in your code?
Inside the source code you can use pragma. Example:
pragma(lib, "gdi32.lib");
In DMD command line you can use -L flag
On Sunday, 15 August 2021 at 10:40:36 UTC, jfondren wrote:
Yeah, that's not possible. You either need the source or a set
of D interface files that declares all the symbols you need.
Meaning, it is possible. On Windows where I assume these .lib
files are:
I mentioned C libraries in an
On Sunday, 15 August 2021 at 10:19:33 UTC, Mike Parker wrote:
On Sunday, 15 August 2021 at 10:12:17 UTC, Timofeyka wrote:
Thank you for your reply!
I wanted to link to my project another project without source
code.
Yeah, that's not possible. You either need the source or a set
of D
Note you might need to open the screenshots externally, as they
are cut off by the forum.
I am unsure where to mention this as I am utterly lost as to what
the issue is, which I can simply best describe with 2
screenshots. Though I'll first give a short description.
For some reason my debugger is "\" for
one of my variables in one of my unittests. This is however not
the case
On Sunday, 15 August 2021 at 10:12:17 UTC, Timofeyka wrote:
Thank you for your reply!
I wanted to link to my project another project without source
code.
Yeah, that's not possible. You either need the source or a set of
D interface files that declares all the symbols you need. The
compiler
On Sunday, 15 August 2021 at 10:05:15 UTC, Mike Parker wrote:
You don't import a .lib file. They are for the linker, not the
compiler. How you make use of it depends on what sort of
library it is and how you're building your project.
If this is all new to you, it will be easier just to
On Sunday, 15 August 2021 at 09:49:39 UTC, Timofeyka wrote:
Hello!
I may have a very stupid question, but still.
How do I include a .lib library? How to use it in your code?
You don't import a .lib file. They are for the linker, not the
compiler. How you make use of it depends on what sort of
Hello!
I may have a very stupid question, but still.
How do I include a .lib library? How to use it in your code?
On Sunday, 15 August 2021 at 09:06:14 UTC, Mike Parker wrote:
The D `string` is an alias for `immutable(char)[]`, immutable
contents of a mutable array reference (`immutable(char[])`
would mean the array reference is also immutable). You don't
want to assign that to a `char*`, because then
On Sunday, 15 August 2021 at 00:15:32 UTC, Ali Çehreli wrote:
Even though this feature is probably never used, in D, multiple
exception objects are chained. For example, you can throw e.g.
in a destructor when there is an active exception in flight and
that second object gets attached to the
On Sunday, 15 August 2021 at 08:11:39 UTC, rempas wrote:
I mean that in C, we can assign a string literal into a `char*`
and also a `const char*` type without getting a compilation
error while in D, we can only assign it to a `const char*`
type. I suppose that's because of C doing explicit
On Sunday, 15 August 2021 at 09:01:17 UTC, jfondren wrote:
They don't do the same thing. toStringz always copies, always
GC-allocates, and always NUL-terminates. `cast(char*)` only
does what you want in the case that you're applying it a string
literal. But in that case you shouldn't cast, you
On Sunday, 15 August 2021 at 08:56:07 UTC, rempas wrote:
On Sunday, 15 August 2021 at 08:53:50 UTC, Tejas wrote:
External C libraries expect strings to be null terminated, so
if you do use `.dup`, use `.toStringz` as well.
Yeah, yeah I got that. My question is, if I should avoid
On Sunday, 15 August 2021 at 08:53:50 UTC, Tejas wrote:
External C libraries expect strings to be null terminated, so
if you do use `.dup`, use `.toStringz` as well.
Yeah, yeah I got that. My question is, if I should avoid
`cast(char*)` and use `.toStringz` while both do the exact same
On Sunday, 15 August 2021 at 08:51:19 UTC, rempas wrote:
On Sunday, 15 August 2021 at 08:47:39 UTC, jfondren wrote:
dup() isn't aware of the NUL since that's outside the slice of
the string. It only copies the chars in "John". You can use
toStringz to ensure NUL termination:
On Sunday, 15 August 2021 at 08:47:39 UTC, jfondren wrote:
dup() isn't aware of the NUL since that's outside the slice of
the string. It only copies the chars in "John". You can use
toStringz to ensure NUL termination:
https://dlang.org/phobos/std_string.html#.toStringz
Is there something
On Sunday, 15 August 2021 at 08:11:39 UTC, rempas wrote:
On Sunday, 15 August 2021 at 07:43:59 UTC, jfondren wrote:
```d
unittest {
char* s = "John".dup.ptr;
s[0] = 'X'; // no segfaults
assert(s[0..4] == "Xohn"); // ok
}
```
Well, that one didn't worked out really well for me.
On Sunday, 15 August 2021 at 07:47:27 UTC, jfondren wrote:
On Sunday, 15 August 2021 at 07:43:59 UTC, jfondren wrote:
On Sunday, 15 August 2021 at 06:10:53 UTC, rempas wrote:
```d
unittest {
char* s = "John".dup.ptr;
s[0] = 'X'; // no segfaults
assert(s[0..4] == "Xohn"); // ok
}
```
On Sunday, 15 August 2021 at 08:17:47 UTC, rikki cattermole wrote:
pragma is a set of commands to the compiler that may be
compiler specific.
In the case of the msg command, it tells the compiler to output
a message to stdout during compilation.
Thanks man!
On 15/08/2021 8:11 PM, rempas wrote:
Still don't know what "pragma" does but thank you.
pragma is a set of commands to the compiler that may be compiler specific.
In the case of the msg command, it tells the compiler to output a
message to stdout during compilation.
On Sunday, 15 August 2021 at 07:43:59 UTC, jfondren wrote:
```d
unittest {
pragma(msg, typeof("John")); // string
pragma(msg, is(typeof("John") == immutable(char)[])); //
true
}
```
Still don't know what "pragma" does but thank you.
```d
void zerort(string s) {
On Sunday, 15 August 2021 at 07:43:59 UTC, jfondren wrote:
On Sunday, 15 August 2021 at 06:10:53 UTC, rempas wrote:
```d
unittest {
char* s = "John".dup.ptr;
s[0] = 'X'; // no segfaults
assert(s[0..4] == "Xohn"); // ok
}
```
So am I going to have an extra runtime cost having to
On Sunday, 15 August 2021 at 06:10:53 UTC, rempas wrote:
So when I'm doing something like the following: `string name =
"John";`
Then what's the actual type of the literal `"John"`?
```d
unittest {
pragma(msg, typeof("John")); // string
pragma(msg, is(typeof("John") ==
On Saturday, 14 August 2021 at 20:50:47 UTC, Carl Sturtivant
wrote:
```
struct S {
int x = 1234;
}
void main() {
import std.stdio;
S s;
//construction of a using &(s.x)
auto a = Ref!(int)();
writeln(a); //displays 1234
s.x += 1;
writeln(a); //displays 1235
a += 1;
So when I'm doing something like the following: `string name =
"John";`
Then what's the actual type of the literal `"John"`?
In the chapter [Calling C
functions](https://dlang.org/spec/interfaceToC.html#calling_c_functions) in the "Interfacing with C" page, the following is said:
Strings are
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