On Sunday, 13 June 2021 at 21:13:33 UTC, frame wrote:
On Sunday, 13 June 2021 at 10:02:45 UTC, cc wrote:
it seems to work as expected with the same C# code. Does D
explicitly disallow slices as an extern(C) export parameter
type?
The spec says that there is no equivalent to type[]. You get a
type* instead.
I can't seem to get it to work as a return type, but
interestingly it does work as an out/pass by ref parameter.
D:
```d
export void D_testString(out string ret) {
ret = "hello".idup;
}
```
C#:
```c#
public struct DString {
public ulong length;
public IntPtr ptr;
public string str {
get {
byte[] b = new byte[length];
for (int i = 0; i < (int)length; i++) {
b[i] = Marshal.ReadByte(ptr, i);
}
return Encoding.UTF8.GetString(b);
}
}
}
[DllImport("test.dll")]
private static extern void D_testString(out DString dd);
public static string testString() {
DString d;
D_testString(out d);
return d.str;
}
```
