On Wednesday, 16 March 2022 at 07:27:06 UTC, test wrote:
```c struct Test { int32_t a; } struct Test2 { int32_t a; Test arr[]; } ```I need static const init Test2, then pass it to c library late(third library, can not change the type def).
Any time you see a '[]' in C, the equivalent declaration in D has to be a pointer. Like Ali said, D's arrays are a pointer and length pair, so declaring the declaration of the `arr` member will not match the declaration on the C side.
Since you say you can't change the declaration on the C side, user1234's answer is the direction you want to go (though you don't need the `extern(C)` on the structs).
