Re: Variable length arrays under -betterC?
On Monday, 17 April 2023 at 19:12:20 UTC, user456 wrote: ... but you'll have to implement - ctors - concat assign - slice assign - copy construction - value type elem alignment - default elem construction - default elem destruction - etc. to make that usable in on trivial cases. I understand from the thread this: D gives us -betterC but nothing from the Phobos. So he says, see what you have, do what the hell you want! Am I wrong about this? SDB@79
Re: Variable length arrays under -betterC?
On Monday, 17 April 2023 at 18:34:19 UTC, DLearner wrote:
Requirement is to write some D code (which avoids the GC), that
will be called from C.
So simple approach seemed to be to write D code under -betterC
restrictions.
However, also need variable length arrays - but D Dynamic
Arrays not allowed under -betterC.
[...]
Any ideas how to implement variable length arrays under
-betterC?
You need a struct with operator overloads and libc realloc(),
(very) basically
```d
struct Array(T)
{
private:
struct Payload
{
T* ptr;
size_t length;
}
Payload p;
public:
size_t length() {
return p.length;
}
void length(size_t v) {
import core.stdc.stdlib;
p.ptr = cast(T*) realloc(p.ptr, v * T.sizeof);
}
ref T opIndex(size_t i) {
return p.ptr[i];
}
}
void main()
{
Array!int a;
}
```
but you'll have to implement
- ctors
- concat assign
- slice assign
- copy construction
- value type elem alignment
- default elem construction
- default elem destruction
- etc.
to make that usable in on trivial cases.
Maybe try to find an already existing one;
https://github.com/gilzoide/betterclist
https://github.com/aferust/dvector
(maybe more in https://code.dlang.org/search?q=betterc)
Variable length arrays under -betterC?
Requirement is to write some D code (which avoids the GC), that
will be called from C.
So simple approach seemed to be to write D code under -betterC
restrictions.
However, also need variable length arrays - but D Dynamic Arrays
not allowed under -betterC.
So tried trivial example using std.container:
```
extern(C) void main() {
import std.container;
auto arr = Array!int(0, 2, 3);
}
```
compiled with:
```
dmd -betterC -run Array_ex_01v00
```
Which failed with:
```
C:\D\dmd2\windows\bin\..\..\src\druntime\import\core\internal\array\construction.d(207):
Error: cannot use try-catch statements with -betterC
C:\D\dmd2\windows\bin\..\..\src\phobos\std\container\array.d(151): Error:
template instance
`core.internal.array.construction._d_arraysetctor!(const(Array!int)[],
const(Array!int))` error instantiating
C:\D\dmd2\windows\bin\..\..\src\phobos\std\container\array.d(244):
instantiated from here: `RangeT!(const(Array!int))`
C:\D\dmd2\windows\bin\..\..\src\phobos\std\container\array.d(633):
instantiated from here: `RangeT!(Array!int)`
Array_ex_01v00.d(5):instantiated from here: `Array!int`
C:\D\dmd2\windows\bin\..\..\src\druntime\import\core\internal\array\construction.d(207):
Error: cannot use try-catch statements with -betterC
C:\D\dmd2\windows\bin\..\..\src\phobos\std\container\array.d(151): Error:
template instance
`core.internal.array.construction._d_arraysetctor!(immutable(Array!int)[],
immutable(Array!int))` error instantiating
C:\D\dmd2\windows\bin\..\..\src\phobos\std\container\array.d(639):
instantiated from here: `RangeT!(immutable(Array!int))`
Array_ex_01v00.d(5):instantiated from here: `Array!int`
```
Any ideas how to implement variable length arrays under -betterC?
Re: Unresolvable dependencies to package
On Saturday, 15 April 2023 at 00:48:21 UTC, Mike Parker wrote: On Saturday, 15 April 2023 at 00:42:17 UTC, Mike Parker wrote: I also suggest you visit the issues page for bindbc-imgui and file an issue there: I meant to delete this line. I've filed the issue: https://github.com/BindBC/bindbc-imgui/issues/1 Inochi Creator is additionally not meant to be used as a package, if you want to use Inochi2D in your game or software you want the inochi2d package, then provide your own OpenGL 3.1 context.
