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knowledge_knowledge/knowledge_aquamarine/marine/marine-rs-sdk.md
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@ -60,10 +60,10 @@ The `[marine]` macro can also wrap an [`extern` block](https://doc.rust-lang.org
* There should be another module, module B, that exports the same functions. The name of module B is indicated in the `link` macro \(see examples below\). * There should be another module, module B, that exports the same functions. The name of module B is indicated in the `link` macro \(see examples below\).
* Module B should be loaded to `Marine` by the moment the loading of module A starts. Module A cannot be loaded if at least one imported function is absent in `Marine`. * Module B should be loaded to `Marine` by the moment the loading of module A starts. Module A cannot be loaded if at least one imported function is absent in `Marine`.
See the examples below for wrapped `extern` block usage:
{% tabs %}
See the example below of a wrapped `extern` block: {% tab title="Example 1" %}
```rust ```rust
#[marine] #[marine]
pub struct TestRecord { pub struct TestRecord {
@ -79,6 +79,18 @@ extern "C" {
pub fn foo(arg: Vec<Vec<Vec<Vec<TestRecord>>>>, arg_2: String) -> Vec<Vec<Vec<Vec<TestRecord>>>>; pub fn foo(arg: Vec<Vec<Vec<Vec<TestRecord>>>>, arg_2: String) -> Vec<Vec<Vec<Vec<TestRecord>>>>;
} }
``` ```
{% endtab %}
{% tab title="Example 2" %}
```rust
[marine]
#[link(wasm_import_module = "some_module")]
extern "C" {
pub fn foo(arg: Vec<Vec<Vec<Vec<u8>>>>) -> Vec<Vec<Vec<Vec<u8>>>>;
}
```
{% endtab %}
{% endtabs %}