On Friday, 30 September 2022 at 06:25:33 UTC, Imperatorn wrote:
On Friday, 30 September 2022 at 00:18:42 UTC, Ruby The Roobster
wrote:
On Thursday, 29 September 2022 at 16:07:59 UTC, mw wrote:
On Thursday, 29 September 2022 at 16:02:43 UTC, Ruby The
Roobster wrote:
Is there any way one can interface with Rust, such as with a
struct, or a function?
I know that rust has an extern keyword, but I can't get it
to work.
https://code.dlang.org/packages/rust_interop_d
Read the notes on memory management:
Only pass pointers as u64 as value type.
This isn't the issue. I can't interface anything, period.
Show an example of exactly what you're trying to do. Maybe it's
some detail
lib.rs:
```rs
#[derive(Debug)]
struct Rectangle {
width: u32,
height: u32,
}
impl Rectangle {
extern "cdecl" fn area(&self) -> u32 {
self.width * self.height
}
extern "cdecl" fn can_hold(&self, other: &Rectangle) ->
bool {
self.width > other.width && self.height > other.height
}
}
```
main.d:
```d
struct Rectangle
{
uint width;
uint hight;
extern(C++) uint area();
extern(C++) bool can_hold(Rectangle rhs)
}
void main()
{
auto rect1 = Rectangle(1,1);
auto rect2 = Rectangle(0,0);
assert(rect1.area == 1 && rect2.area == 0 &&
rect1.canHold(rect2));
}
```
lib.rs was built as a "staticlib" using rustc, and the command I
used was:
ldc2 -m64 main.d lib.lib
The output:
```
main.obj : error LNK2019: unresolved external symbol "public:
unsigned int __cdecl Rectangle::area(void)"
(?area@Rectangle@@QEAAIXZ) referenced in function _Dmain
main.obj : error LNK2019: unresolved external symbol "public:
bool __cdecl Rectangle::can_hold(struct Rectangle)"
(?can_hold@Rectangle@@QEAA_NU1@@Z) referenced in function _Dmain
main.exe : fatal error LNK1120: 2 unresolved externals
Error: C:\Program Files (x86)\Microsoft Visual
Studio\2022\BuildTools\VC\Tools\MSVC\14.33.31629\bin\HostX64\x64\link.exe failed with status: 1120
```
Also, is it normal for the .lib file to be 11 megabytes?
