Error code E0044

You cannot use type or const parameters on foreign items.

Example of erroneous code:

extern "C" { fn some_func<T>(x: T); }
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To fix this, replace the generic parameter with the specializations that you need:

extern "C" { fn some_func_i32(x: i32); }
extern "C" { fn some_func_i64(x: i64); }
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